    [Time Interval Apparatus Ee-56, Ee-85, Ee-86-A, Line Connector Unit Ee-87, Time Interval Signal Be-65, and Bell MC-153]
    [From the U.S. Government Publishing Office, www.gpo.gov]

    ﻿VVl35’:n-433
    TM 11-433
    Document WAR DEPARTMENT Reserve _____________________
    / TECHNICAL MANUAL
    TIME INTERVAL APPARATUS EE-56, EE-85, EE-86-A
    LINE CONNECTOR UNIT EE-87
    TIME INTERVAL SIGNAL BE-65
    AND BELL MC-153
    August 17, 1942
    NON-CIRCULATING
    Ai,W nsiN
    TM 11433
    TECHNICAL MANUAL No. 11-433
    WAR DEPARTMENT, Washington, August 17, 1942.
    TIME INTERVAL APPARATUS EE-56, EE-85, EE-86-A, LINE CONNECTOR UNIT EE-87, TIME INTERVAL SIGNAL BE-65, AND BELL MC-153
    Section I. General.
    Paragraph
    Purpose_________________________________________ 1
    Use_____________________________________________ 2
    Description_____________________________________ 3
    Capabilities____________________________________ 4
    II.	Employment.
    Installation____________________________________ 5
    Preparation for use_____________________________ 6
    Operation_______________________________________ 7
    III.	Detailed functioning of parts.
    Time interval apparatus EE-56___________________ 8
    Time interval apparatus EE-86-A_________________ 9
    Time interval apparatus EE-85__________________ 10
    Line connector unit EE-87______________________ 11
    Time interval signal BE-65_____________________ 12
    IV.	Servicing and repair.
    Servicing______________________________________ 13
    Inspection_____________________________________ 14
    Lubrication____________________________________ 15
    Special adjustments____________________________ 16
    V.	Lists of replaceable parts.
    Time interval apparatus EE-56__________________ 17
    Time interval apparatus EE-86-A________________ 18
    Time interval apparatus EE-85__________________ 19
    Line connector unit EE-87______________________ 20
    Time interval signal BE-65_____________________ 21
    Page
    Appendix. Addresses of manufacturers__________________________ 66
    Section I
    GENERAL
    Purpose_________________________
    Use_____________________________
    Paragraph
    1
    2
    Description__________________________________________________________________ 3
    Capabilities_________________________________________________________________ 4
    473998°—42---1
    1
    TM 11-433
    1-2	SIGNAL CORPS
    1. Purpose.—a. Time interval apparatuses EE-56, EE-85, and EE-86-A* are designed to afford chronological coordination of all functions of fire control of the Coast Artillery Corps. The battery commander and personnel concerned with the several functions at observation posts, plotting rooms, and gun positions thus to a great extent are guided and their functions coordinated, by means of proper control of the time element, through accurate time interval programs.
    b. Time interval apparatuses EE-56 and EE-86-A, with the associated bells MC-153, are designed for use in permanently installed fire-control systems of fixed seacoast artillery. Time interval apparatus EE-86-A is of later design and includes certain improvements and refinements.
    c. Time interval apparatus EE-85, with the associated line connector unit EE-87 and time interval signal BE-65, is designed for use in fire-control systems of mobile seacoast artillery.
    2. Use.—a. General.—(1) Seacoast artillery must be able to fire simultaneously on a number of relatively small, rapidly moving, armored targets; make necessary changes in types of projectiles or weights of propelling charges; and take full advantage of fleeting opportunities to deliver an intensive and accurate fire.
    (2) Time interval equipment is, therefore, an integral part of fire-control communication systems of both fixed and mobile seacoast artillery.
    b. Provision jor time interval signals.—(1) In fixed seacoast artillery, either time interval apparatus EE-56 or time interval apparatus EE-86-A is used to provide the timing of time interval signals. Either is capable of providing time intervals suitable for any or all elements of armament controlled from one fire-control switchboard without requiring relays and local power supply in distant stations. A section of the regimental headquarters battery, except in the case of separate battalions, is responsible for operation and maintenance of the fire-control communication system, including the time interval system. Installations and major repair or replacement are the responsibility of the corps area signal officer.
    (a) The EE-56 produces electrical signal impulses at 10-, 15-, 20-, and 30-second intervals concurrently. The time interval impulses are transmitted to bells MC-153 at observation posts, plotting rooms, battery commanders’ rooms, and gun wells and platforms of gun emplacements. Additional auxiliary equipment is necessary for switching desired time interval signals to all batteries and distributing the signals to various locations within each firing battery. Switch
    *No production was ever made under the nomenclature “time interval apparatus EE-86,” the first production having been designated “EE-86-A.”
    2
    TM 11-433
    2-3
    TIME INTERVAL APPARATUS, ETC.
    boards BD-15 (time interval switch-panel), BD-74, or BD-78, provide for switching any one of the four time intervals to each firing battery. Frame FM-5 provides for distributing the time interval signals in use in each battery to all bells employed within the battery time interval system.
    (&) Time interval apparatus EE-86-A differs from the EE-56 in that it produces electrical signal impulses for 1-, 5-, 10-, 15-, 20-, 30-, 40-, and 60-second intervals and ordinarily would be used with either switchboard BD-74 or switchboard BD-78, both of which provide for switching and distribution.
    (2) In mobile seacoast artillery, time interval apparatus EE-85, line connector unit EE-87, time interval signal BE-65, and batteries BB-50 are used to supply desired time interval signals. In mobile units, each battery is responsible for installation, operation, and maintenance of its own time interval equipment; each is supplied with one time interval apparatus EE-85, one line connector unit EE-87, five time interval signals BE-65, and two batteries BB-50 (12-volt storage).
    (a)	The EE-85 produces electrical signal impulses for 1-, 5-, 10-, 15-, 20-, 30- and 45-second intervals, or other specially desired intervals as explained in paragraph 3c(4)(&) and (c).
    (6)	Line connector unit EE-87 pre duces a 1,000-cycle tone which is superimposed on telephone lines in signal impulses as determined by time interval apparatus EE-85, to which it is connected.
    (c)	Time interval signals BE-65 are installed at gun positions and in the plotting room. The tinie interval signals BE-65 are connected directly to the time interval apparatus EE-85.
    3. Description.—a. Time interval apparatus EE-56.—This apparatus is mounted on a hollow oak base and is provided with a protecting oak cover (fig. 1). A bakelite terminal strip with seven binding posts and a dial switch is mounted at the front of the base. The dial switch positions are designated OFF and ON. Two binding posts are marked 30 VOLTS d-c for connection to 30-volt direct-current power supply, and five binding posts are marked C, 10, 15, 20, and 30 for connection to the common connection and 10-, 15-, 20-, and 30-second connections respectively of the time interval program circuits. The motor, governor, cam arbor, and contactor assemblies are mounted on a bronze casting which is bolted to the oak base. Over-all dimensions of the complete unit are 13% by 10% by 14% inches and the net weight is 45 pounds.
    (1)	The motor is of series type, runs at 1,280 revolutions per minute with 30-volt direct-current power supply, and is equipped with ball bearings. The motor is mounted vertically on the front end of the
    3
    TM 11-433
    3
    SIGNAL CORPS
    bronze frame, and the adjustable-speed centrifugal-type governor is mounted on an extension of the motor shaft. A 100-ohm resistor is in series with the motor circuit. The motor drives a cam arbor through a gear train consisting of two stages of speed reduction. One stage is at the worm gear cut on the extended motor shaft and the other is a set of spur gears, the larger of which is mounted with the cam arbor assembly as the driving gear. The smaller spur gear is cut on one end of the shaft on which the worm wheel is mounted.
    gUj.—Cam groups iMp-Cam- arbor assembly ZzL-Cam dish
    Spind/e irMp Governor
    Ctamps -.Driving gear ■ Cover - Resistor
    Shaft support Motor
    Cam-contactor assemblies -
    Main frame —
    TL-35ZQ
    Star ting switch > Tormina/strip gpj Base jp^-Satterp binding
    sec f^^Pbst 'Sp20 dec. binding post fggtMdec. binding post jZ /Osec. binding post Common binding post
    Figure 1.—Time interval apparatus EE-56.
    (2)	The cam-arbor assembly is mounted on a spindle carried by a stationary steel shaft clamped at front and rear by two brackets which form part of the frame casting. The spindle revolves about the stationary shaft on ball bearings, and is pinned to the driving gear at the front end. The driving gear and four cam disks and the bushings for separating them are mounted on the spindle and on three rods. The front ends of the rods are bolted to the driving gear at three equidistant points close to the periphery of the gear. The other ends of the rods are bolted to the fourth cam disk which is pinned to the arbor spindle to prevent lateral movement of the cam disks. All four cam disks are equipped with cam groups having projections which operate con
    4
    TM 11-433
    TIME INTERVAL APPARATUS, ETC.	3
    tactors associated with the cam disks. Each cam group is fitted with two dowel pins and a knurled-head screw which fit into two drilled holes and one drilled and tapped hole close to the periphery of the cam disk, and secure the group in place. All four cam disks are drilled and tapped to receive cam groups necessary for any one of the four time intervals. All disks and cam groups are interchangeable.
    Note: Time interval apparatus EE-56 is normally assembled when issued so that cam groups are arranged for 10-, 15-, 20-, and 30-second synchronized intervals on the first, second, third, and fourth disks from the front of the apparatus. The first disk has six three-projection cam groups equally spaced at 60°, each producing the firing signal and 1- and 2-second warning signals. The second disk has four three-projection cam groups equally spaced at 90°, and the third disk has three equally spaced at 120°. The fourth disk has two three-projection cam groups equally spaced at 180°, each producing the firing and warning signals, and two single-projection cams leading the other cam groups by 30°, each producing a 5-second warning signal. Each disk is drilled and tapped in the same manner so that if the cam groups are rearranged, any disk can produce any of the four intervals and also a 60-second interval to meet the needs of the particular harbor defense project. Several additional single-projection and three-projection cam groups are included so that various arrangements of preliminary, warning, firing, and observing signals are possible.
    (3)	Four cam-contactor assemblies are mounted on the base of the casting and are insulated from it by a bakelite strip. Each has screw adjustments for duration of contact closure and for operation of rubber bumpers which cushion the fall of the rocker arms.
    b. Time interval apparatus EE-86-A.—This is constructed similarly to time interval apparatus EE-56 (fig. 2). Important changes are the use of mahogany instead of oak, addition of four cam disks to gain four more time intervals, increase of speed of the motor to 1,380 revolutions per minute, addition of a master timing contact (fig. 3), an improved type of motor governor, and inclusion of a stroboscopic tuning fork. Mounted on the terminal strip are a toggle switch and eleven binding posts to accommodate the four additional time interval program circuits. The positions of the switch and the battery and time interval binding posts are designated as are those of the EE-56. Over-all dimensions of the complete unit are 18 by 11 by 15% inches, and the net weight is 72 pounds.
    (1)	(a) The improved governor is more positive in its adjustment and operation. The governor gives constant motor shaft speed within ±0.25 percent at 27 to 30 volts.
    (6) The stroboscopic tuning fork is contained in a compartment in the rear of the base of the apparatus. It is used to regulate the motor speed, having a frequency such that when it indicates a stationary pattern of the governor the speed of the motor is 1,380 revolutions per
    5
    TM 11-433
    3
    SIGNAL CORPS
    minute (±0.05 percent). The fork is made of chromium steel alloy and the ends of the tines are each fitted with slotted brass pieces. The entire fork is fastened securely in a black metal case which has apertures to make it possible to look through the slots of the fork.
    (2)	A master 1-second timing-contact cam is driven through another worm gear by the same worm which drives the cam-arbor
    Base
    Cam disks'^
    Cam contactor assembiies
    Main frame
    Cover
    Battery binding posts
    Figure 2.—Time interval apparatus EE-86-A.
    Term/nat strip
    Corer fastening\p
    TL-3530
    Common binding post 60sec binding post 40sec. binding post 30 sea binding post 20 sec. binding post Msec, bindingpost to sec. binding post 5sec bindingpost /sec. binding post
    worm gear. This cam operates the master timing contact which acts as the make contact of all time interval circuits.
    (3)	Additional disks and an improved method of spacing the drilled and tapped holes are used in the cam-arbor assembly of the EE-86-A. Seven disks are mounted in the same way as the four disks of the EE-56. The eighth cam disk is pinned to a secondary spindle mounted on an extension of the arbor shaft. This secondary spindle is driven from the forward spindle through a two-stage spur-gear train providing a step-up ratio of two to three, so that it rotates at 1% revolutions per minute. The first cam disk is cut from one piece of steel to provide 60 projections equally spaced around its periphery. The next six cam disks are drilled and tapped to receive cam groups
    6
    TM 11-433
    3
    TIME INTERVAL APPARATUS, ETC.
    at twelve equidistant points about their peripheries. The eighth cam disk, which is located on the 1%-revolutions-per-minute spindle, is drilled and tapped at eight equidistant points around its periphery. Cam groups of the eighth cam disk are not interchangeable with those of the other six drilled and tapped disks.
    Cam disks
    Cam groups
    Tun/ng fork
    np}t
    Startina switch
    Figure 3— Time interval apparatus EE-86-A—master 1-second timing contact and governor.
    Prive gears
    Spind/e
    Ciamp
    Contacts
    Tension adjusting spring—
    Main adjusting screw
    Swiue/ joint
    Worm drive
    Pt as ter one-second timing cam piaster one-second timing contacp
    Motor
    Pivot Pin
    Resistor
    Note: Time interval apparatus EE-86-A is normally assembled so that cam groups are arranged for 1-, 5-, 10-, 15-, 20-, 30-, 40-, and 60-second synchronized intervals on successive disks from the front of the apparatus. The projections are cut into the periphery of the 1-second disk, and the 5-second disk has twelve single-projection cams equally spaced at 30°. The 10-second disk has six three-projection cam groups equally spaced at 60°, each producing the firing signal and 1- and 2-second warning signals. The 15-second disk has four three-projection cam groups equally spaced at 90°, the 20-second disk has three at 120°, the 30-second disk has two at 180°, the 40-second disk has one, and the 60-second disk has one. Because cam groups are interchangeable for all but the 1- and 40-second disks, any of the other six intervals may be produced on any of the six disks, if cam groups are rearranged to meet the needs of a particular harbor defense project. Additional single-projection and three-projection cam groups are provided so that various arrangements of preliminary, warning, firing, and observing signals are possible.
    TM 11-433
    3
    SIGNAL CORPS
    c. Time interval apparatus EE-85 — This apparatus is contained in a birch case with hinged cover and web carrying strap. A flush-hasp clasp holds the cover securely in place. A spring-hinged section on the left side of the cover provides entrance for field wire and battery
    ■Shutter-
    ---Corer

    0
    0
    ©
    ©
    0
    0
    Battery bindiffo
    T/me interra/ binding posts
    Time interra/ binding posts
    Clock
    Catch
    TL-3532
    Startma
    •StV/fc/7
    Carrying strap
    Case
    Figure 4.—Time interval apparatus EE-85.
    „C/ock b/nd/na posts
    leads. The case is 7 by 11% by 14% inches, and the entire apparatus weighs 14 pounds.
    (1)	Two bakelite panels are mounted at the top of the case (fig. 4), one providing an opening for the clock and a means for holding it rigidly, and the other having switch SW-105 and 25 binding posts on
    8
    TM 11-433
    3
    TIME INTERVAL APPARATUS, ETC.
    top and the interval-producing mechanism mounted on the under side (fig. 6). Only the OFF position of this two-position toggle switch is designated. Three binding posts TM-152, with no designation, are provided for the metal straps connecting the clock, and two binding posts TM-109 are designated + and —12 volts for battery connection.
    o
    £
    TIME INTERVAL APPARATUS EE-85-
    Figure 5.—Time interval apparatus EE-85—clock and spare disks.
    C/ock
    Magnetic bar
    E/ectro- . magnet
    Motor contact
    Ax/e Weight Resistor
    •Spring Auxi/iaru contatt
    Cup
    Spare disks
    0 G) @

    Also, four binding posts TM-175 are provided for common connection, for any of the desired time intervals, two each for the 1-, 5-, 10-, 15-, 20-, 30-, and 45-second intervals, one for the spare contact on the 90-second arbor, and one for the spare contact on the 120-second arbor. The time interval contacts are designated COM., 1, 5, 10, 15, 20, 30, 45, SPARE 90" ARBOR, and SPARE 120" ARBOR respectively.
    (2)	The clock is resonance type, electromagnetically driven from the 12-volt battery supply (fig. 5). It consists of a center vertical
    473998°— 42—2
    9
    TM 11-433
    3
    SIGNAL CORPS
    axle upon which is mounted a heavy cylindrical weight, a contact operating mechanism, and a magnetic bar suspended between the windings of an electromagnet. At the bottom of the axle is fastened a heavy spiral spring. The spring also is connected to a contact arm which closes a heavy auxiliary contact. The time of one complete oscillation of the clock is 1 second. A capacitor and a resistor in
    Ratchet wheel
    'Stop post
    Res/stor.
    tl-3534
    Support-/rip post
    ■Pane/
    Stop
    Drive bar b/och
    P/ate
    Drive
    Oar
    Dr/vebar tension spr/rig
    Locknut
    Spr/rig teris/on adj. screw Stoppost Armature stop /tappet armature
    Drive magnet
    Armature tension
    Starting, switch
    Ratchet paw/
    Paw/ support
    Paw/.
    spr/np
    90-second cam-arboi
    gear /zo-seconq cam-arbe r
    gear-" Capac/to."
    Synchro//-/z/rigpost
    post
    Contact screw
    Contact spr/np Termipa/ strip
    Mounhhp
    Contact pressure adjust-. meat
    Figure 6.—Time interval apparatus EE-85—driving, interval-producing, and contact mechanisms.
    series are bridged across the motor contact of the clock. Also, a 10-ohm resistor in series with two 0.5-microfarad capacitors in parallel is bridged across the auxiliary contact.
    (3)	The driving mechanism consists of a driving magnet which turns the 90-second arbor through a ratchet bar (fig. 6). The 120-second arbor is geared to the 90-second arbor and turned by it.
    (4)	The actual interval-producing mechanism consists of the 90-second and 120-second arbor pins, four bakelite disks mounted on each of them, and heavy wiping contacts operated by the disks (fig- 6).
    10
    TM 11-433
    TIME INTERVAL APPARATUS, ETC.	3
    (a)	In addition to the main arbor pin of each arbor assembly, there is a synchronizing pin projecting from each of the two gears, parallel to the arbor. The bakelite disks are drilled to fit on both these pins, one hole being at the center for the main arbor pin and the other hole being off-center for the synchronizing pin. On each arbor assembly, the disks are separated from the gear and from each other by small spacers. They are held in place by a brass washer and nut on the main arbor pin, and may be removed easily.
    (6)	The 5-second-interval disk is mounted next to the gear on the 90-second arbor and has raised sections cut on its circumference to hold the corresponding contact closed 1 second of each 5 seconds. Next to this disk is the 15-second disk, having a raised section cut to hold its contact closed for the last 3 seconds of each 15-second interval. The third disk is the 45-second disk, cut to close its contact for the fortieth second and for the last 3 seconds of each 45-second interval. These three disks are synchronized so that the last second of each series of the 45-second interval coincides with that of the 5-second interval for two positions of the arbor, and the last second of each series of the 15-second interval coincides with that of the 5-second interval for six positions. It is the position of the holes for the synchronizing pin which affords synchronization, the holes being marked S5, S15, and S45, respectively. The fourth disk operates the contact connected to the binding post marked SPARE 90" ARBOR, the disk furnished being a 45-second disk similar to the other except that there are three arbor-pin holes. To obtain delayed time interval programs instead of synchronized programs, holes are drilled at two positions other than the synchronized position on this fourth disk. The hole for the synchronized position is marked S45, and the others are marked D5 and D15 (fig. 6) to denote 5- and 15-second delays in the time intervals from the intervals of the synchronized position. To obtain the desired delayed program, the synchronizing-pin hole so marked is fitted over the synchronizing pin.
    (c)	On the 120-second arbor next to the gear is the 10-second disk, the raised sections of which hold the corresponding contact closed for the last 3 seconds of each 10-second interval. Next is the 20-second disk, cut to close its contact for the fifteenth second and for the last 3 seconds of each 20-second interval. Third is the 30-second disk, closing its contact for the twenty-fifth second and for the last 3 seconds of each interval. These three disks are synchronized by the location of their synchronizing-pin holes and are marked S10, S20, and S30, respectively. The fourth disk operates the contact connected to the binding post marked SPARE 120" ARBOR. Either of two disks are
    11
    TM 11-433
    3
    SIGNAL CORPS
    available to be used as the fourth disk. They are furnished with synchronizing-pin holes marked S20, D5, and D10 for one, and S30, DIO, and D15 for the other. These disks provide delayed 20- and 30-second intervals as indicated. .One of these disks is carried on the
    Shutter
    Cover
    Battery binding posts
    LINE CONNECTOR U
    Ik
    TL-3535
    Figure 7.—Line connector unit EE-87.
    Case
    Hasp
    Carry-idg strap
    EE 85 connec-t/O/7 bind/n post
    Hammer hey
    - Vo/ume hey
    Line binding posts
    120-second arbor, and the other is mounted on a stud inside the case (fig. 5), with two blank 90-second and two blank 120-second disks which may be cut for any desired intervals within the scope of their respective arbors.
    (d)	The contact closed by the raised portions of each disk is in series with battery, switch, auxiliary contact of the clock, and corresponding interval binding post and common binding posts (fig. 20). Each contact consists of a light spring armature which rides on the
    12
    TM 11-433
    3
    time interval apparatus, etc.
    disk, and a make-contact point which is in itself a screw adjustment.
    d. Line connector unit EE-87 — The unit is contained in a birch case similar to that of the EE—85, and has a hinged cover and web carrying strap (fig. 7). A flush-hasp clasp holds the cover in place, a spring-hinged section on the side of the cover providing entrance for
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    Capao/fors~LL- Il M '	I / /
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    /	/ / / L-lZ/z//77 A X"'?	xX" / / / / Tes/sfors
    ®	frn~~//ammer
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    / /	~n /w / / /
    // 4__	[oj / I
    Mu/fip/e	Kw	I /
    /®®g	-—/—-^Hummers
    '	EL--^es/s/or
    Figure 8.—Line connector unit EE-87—internal view.
    field wire and battery leads. A bakelite panel, mounted at the top of the case, has sixteen binding posts TM-175 and two Western Electric 479-type key switches fitted on it. Inside the case are mounted six transformers, one North Electric Company multiple relay, two duplicate General Radio 572B microphone hummers, and six 0.1 juf capacitors (fig. 8). The case is 7 by 11 by 14% inches, and the entire unit weighs 26% pounds.
    13
    TM 11-433
    3	SIGNAL CORPS
    (1)	Of the bakelite panel fittings, two binding posts are designated + 12 VOLTS—for battery connection, two are designated RELAY for connection to common and desired time interval terminals of the time interval apparatus EE-85, and 12 are designated in pairs for connection to six telephone lines. One key switch, designated INT. 1, OFF, and INT. 2 for the three positions of the key lever, connects one or the other hummer to the circuit. The other key switch marked LOUD, MED., and LOW, controls the volume of the hummer tone.
    (2)	Six transformers C-231, wired as shown in figure 21, induce the voltage output of either hummer on the telephone line terminals. Transformer C-231 has 350 turns on the coil connected to terminals numbered 1 and 2, and 850 turns on the coil connected to those numbered 3 and 4.
    (3)	The multiple-contact relay (fig. 8) has seven knife contacts. The moving contacts are mounted on flat springs. One contact completes the circuit to the hummer coil primaries and the other six contacts complete the six circuits to the telephone line terminals.
    (4)	Each microphone hummer (fig. 8) produces 1,000-cycle tone. The hummer is a push-pull arrangement of a carbon-microphone transmitter button opposing a vibrator-type receiver. A small transformer is a part of each hummer.
    (5)	A 0.1-microfarad capacitor CA-166 is placed in series in each telephone line circuit (fig. 21).
    e. Time interval signal BE-65.—This is a local battery howler housed in a heavy, crackled black metal case with carrying handle. A heavy screen grille on the front (fig. 9) covers a resonator chamber and heavy, blast-proof diaphragm. The back cover is hinged at the bottom and held in place by two knurled-head screws at the top. There is a heavy waterproof gasket around the inside edge of the cover and at the opening provided for entrance of the line wires. Inside the case are a relay, a heavy vibrator acting on a diaphragm, a bakelite terminal panel, and a battery compartment for two batteries BA-23 (fig- 10).
    (1)	The small bakelite terminal panel has four binding posts mounted on it. Two binding posts TM—152 are designated +3 VOLTS- and two binding posts TM-195 are designated LINE.
    (2)	The battery compartment consists of a metal slide held in place when the cover is closed, upon which two batteries BA-23 are clamped in wooden cradles by means of metal straps and thumbscrews. Leads are provided for connecting the dry batteries in series and to binding posts on the terminal panel.
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    TM 11-433
    3
    TIME INTERVAL APPARATUS, ETC.
    (3)	The relay is of great sensitivity, having a large number of turns on the coil, the resistance of which is 1,950 ohms. The moving contact point is mounted on the pivoted armature, at the end away from the coil. Stops for motion of armature both backward and forward, a return tension spring, and a coil spring bumper are parts of
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    Wplk _ — 'M&
    ^grfde_fenrWBffi	- A'^ragm
    jmr ;	-*-Meta/
    case
    ------------fl -Morn 0
    '	'Z2Z	tl '3537
    Figure 9.—Time interval signal BE-65—front view.
    the relay, the entire mechanism being mounted on an insulating plate* The relay coil is connected to the terminals of the binding posts marked LINE and the contact which it operates is in the horn magnet circuit.
    (4)	The vibrator-diaphragm-resonator assembly, or horn assembly, is of extremely rugged construction (fig. 11). There is a strong U-shaped electromagnet of only 0.1-ohm coil resistance. A diaphragm
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    TM 11-433
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    SIGNAL CORPS
    is fastened to the armature of this magnet. A post is fastened to the diaphragm and passes back through the magnet to the magnet contact
    Capac/tor-
    Re/ay magnet
    Re tag 7— armature
    Capac/tor term/nat
    Con tacts .Contact adjustment
    V/Bra tor armature
    Armature spr/ng -
    Rece/re w/re from EE-85
    Pad
    FTn	—
    ——rm
    Or
    LINE	+ 3 VOLTS -
    000*I--
    *" — W	1 flw"^ 1 JI
    p/aWCM
    \\	(©%K // WW
    / /7/r	/Sx-
    I	nl.'
    ^Case
    Capac/tor
    Retracti/e spr/ng
    Tens/on adjustment Capac/tor term/na/
    .Stop adjustment
    -Horn , assemB/y
    Base "Arch
    -Arc/?, adjustment screw
    V/Brator Stop ad/ust-/crew
    Term/'nat pane/
    Batter/es BA-23
    -Battery tray
    -H/nge
    TL-JSJ8
    Figure 10.—Time interval signal BE-65—back with cover open.
    assembly, or vibrator contact assembly. A 6-microfarad capacitor is connected in parallel across the vibrator contact, as part of the vibrator circuit. A cone-shaped resonator is mounted in front of the diaphragm.
    16
    TM 11-433
    4
    TIME INTERVAL APPARATUS, ETC.
    ■Arch
    Base
    Mora core assemh/u
    Arch ad/ash enenh screw /
    Carhr/ctye
    tl-3539
    Arch achjash/nenh hochr rut
    Figure 11.—Time interval signal BE-65—horn assembly.
    Spr/ny..
    Con ha ch shr/p-
    Posh dampen
    Coahach po/ahs
    Shop aajashmh. screw
    Shop ad/ashmen h hoc A nah
    Shop
    P/aphraprn
    Papa eh arenahare
    ■Posh adydshmenh hash-nah
    -Posh adjashmenh screw Papaeh w/ad/np hdaaaeh core
    4. Capabilities.—a. Fixed seacoast artillery time interval equipment.—(1) Accuracy of the motor governor, controlling factor of accuracy of time intervals, of time interval' apparatus EE-86-A is well within the Emits of accuracy of other functions of fire control and their corresponding equipment. Accuracy of the motor governor of time interval apparatus EE-56 is lower, but is commensurate with accuracy of the other parts. It is necessary that personnel whose functions are directed by time intervals be trained to react instantly upon hearing the bell, so that no lack of uniformity in time of observation or time of firing results.
    (2) In providing 1-, 5-, 10-, 15-, 20-, 30-, 40-, and 60-second intervals, time interval apparatus EE-86-A provides all time intervals necessary for observation, for firing of all calibers of guns, and for all methodsof placing fire on the target. Though fewer time intervals are provided by time interval apparatus EE-56, proper use of available intervals results in almost equal flexibility.
    (3) If bells MC-153 are connected properly (par. 5a(3)(eZ)), either time interval apparatus EE-86-A or time interval apparatus EE-56 will provide signals at all stations at which bells are located.
    b. Mobile seacoast artillery time interval equipment.—(1) Accuracy of the clock, controlling factor of accuracy of time intervals, of time inter
    473998°—42---3
    17
    TM 11—433
    4-5
    SIGNAL CORPS
    val apparatus EE-85 is lower than that of the motor governor of the EE-86-A, but is greater than the combined accuracy of equipment of other functions of fire control effected.
    (2) Timo interval apparatus EE-85 and associated equipment provide all time intervals necessary for observation and firing.
    (3) Time interval apparatus EE-85 will provide signals at all places where time interval signals BE-65 are to be located and at all telephone stations which have the 1,000-cycle tone signals superimposed on their circuits by line connector unit EE-87.
    Section II
    EMPLOYMENT
    Paragraph
    Installation___________________________________________________________________ 5
    Preparation for	use___________________________________________________________ 6
    Operation______________________________________________________________________ 7
    5. Installation.—a. Fixed seacoast artillery time interval systems.— (1) Responsibility.-—Installation of time interval apparatus EE-56 and EE-86-A in permanent coast artillery fire-control communication systems is under technical control of the corps area signal officer. Also, any major repair to the time interval system which is beyond the capacity of local coast artillery troops is referred to the corps area signal officer.
    (2) Location.—Either thd EE-56 or EE-86-A is installed in the fire-control switchboard room, as it is required that time interval apparatus provide time intervals for any or all elements of armament controlled from one fire-control switchboard, without relays and local power supply in distant stations. Whether connected directly to bells or through switching equipment, time interval apparatus is located conveniently to the fire-control switchboard and other switching equipment and where it is free from vibration and extreme temperature change.
    (3) Connection.—(a) It is recommended that both time interval apparatus EE—56 and EE-86-A be used with switching equipment in providing signals at the bells of all stations. For the installation of either time interval apparatus, the binding posts marked 30-VOLT d-c are connected across the 30-volt switchboard battery supply bus by running two lines directly to switchboard BD-65 (power panel). When time interval apparatus EE-56 is used with switchboard BD-15 (switching panel) and frame FM—5 (fig. 12), each time interval binding post 10, 15, 20, and 30 is connected to the corresponding time interval bus 10, 15, 20, or 30 of the BD-15, and the common binding post C is
    18
    TM 11-433
    5
    TIME INTERVAL APPARATUS, ETC.
    connected through the 30-volt switchboard battery supply bus (at the BD-65) to the common bus C of the BD-15. Switchboard BD-15 provides the desired time interval for any gun battery and frame FM-5 distributes the time interval to all bells within the battery. In effect, time interval apparatus program circuit, battery, switchboard, frame, and bell are connected in series.
    (6) Either time interval apparatus EE-56 or EE-86-A is used with switchboard BD-74 or BD-78. Both switchboards have a double row of jacks in each section, an upper row of line jacks and a lower row of tie jacks, as shown in figure 13. The common binding post C of the EE-86-A is connected through the 30-volt switchboard battery supply bus (at the BD-65) to the tip terminals T1 of all tie jacks and the tip terminals T of all line jacks of the BD-74 or BD-78 which are used to furnish any of the eight time intervals. Each time
    T/me IntervalApparatus E£-36 i- r \7o 30 v switchboard
    So To To To c--------------J---bus on BD-65
    ________________?	? DC. ff	^Common bus ,
    I____________________ o 30 sec bus 0	’
    -----------------------------  20 sec bus o	CfW
    ---------------------------------^i-5sec bus Q	lyBB —Q-
    --------------------------------------JitOsec bust	|j=§ 0A iS Pet/s
    I——,----------- / AtC-t33
    Switchboard ''Frame TE-3540	pp-fp	rrpj.r
    Figure 12.—Time interval apparatus EE-56—connection through switching equipment.
    interval binding post (1, 5, 10, 15, 20, 30, 40, and 60) is connected to the sleeve terminals R1 of the tie jacks and the sleeve terminals R of the line jacks which are designated as furnishing that particular time interval. The line which runs to the bells of each battery is connected to the tip terminal T and the sleeve terminal R of one of the tie jacks which furnishes that time interval which is customarily used by that battery. Careful examination of figure 13 shows that when no plug is in the tie jack to which the line of the particular battery is connected, the customary time interval is connected directly to that battery. If another time interval is desired, a patching cord is plugged into a line jack designated as furnishing the newly desired time interval and into the tie jack to which the line of that battery is connected. Plugging into the tie jack disconnects the formerly desired time interval circuit at the tie jack and applies the presently desired time interval supplied by the patching cord. Thus each battery receives its customary time interval without the use of patching cords and their use is resorted to only under unusual circumstances
    19
    TM 11-433
    5
    SIGNAL CORPS
    requiring a different time interval, which then is available at a selected number of line jacks. In effect, time interval apparatus EE-86-A, 30-volt battery supply, switchboard BD-74 or BD-78, and bells MC-153 complete a series circuit. Very few EE-86-A have been procured and at the time of writing none of them have been installed. All switchboards BD-74 and BD-78 in use are connected to time interval apparatus EE-56. The connections are similar to those described above except that only 10-, 15-, 20- and 30-second intervals are available.
    i r	।
    I Line c i
    l Jack	1
    I m	OW!
    ' P------_ I
    1 kn--------
    ; o
    Time Interval Apparatus EL-86-A	| l7^ |	I
    /so	Ur-^^wOdsupp/y
    i	‘-----------1
    ---------]——____________________ । —।
    1 ■	? 1	I Tie q|
    ---*-	| Jack\ I
    Ll-	I 1 Li I
    -----------------J — i !
    I kQ
    —4a------------
    i Kl	I
    _T if U
    Be//st=U 1--------------1
    tl-3541	/dC-153^ s witch board BD-74 or BD-78
    Figure 13.—Time interval apparatus EE-86-A—connection through switching equipment.
    (c) If the bells are connected directly to the time interval apparatus without the use of any switching equipment, the arrangement is a series connection of time interval apparatus, battery supply, and bell (figs. 12 and 13).
    (d) Time interval apparatus EE-86-A is designed to operate with bells MC-153, and it is recommended that bells MC-153 be used also with the time interval apparatus EE-56, although the EE-56 was originally designed for use with several older types of bells. For best operation it is suggested that the two coils of each bell MC-153 be connected in parallel up to the distance where the line loop resistance is 500 ohms, and in series beyond that point. Whether one or several bells are connected to one line depends on positions of the bells in
    20
    TM 11-433
    TIME INTERVAL APPARATUS, ETC.	5
    relation to each other and distances of the bells from the time interval source. Also, if several bells are connected to one line, determination of whether the bells should be connected in series or parallel with each other depends on the distance from the time interval source and the number of bells connected. Never does one line carry bells of more than one seacoast artillery battery. The characteristics of the bell-wiring system which must be considered in designing the system are that 15 bolts are required to operate each bell and that the calculated direct-current resistance of the line and bells between the source and a particular bell should be approximately equal to and never appreciably greater than the resistance offered by that bell.
    b. Mobile seacoast artillery time interval equipment.—(1) Responsibility.—Installation of time interval apparatus EE-85 and associated equipment, line connector unit EE-87, and time interval signal BE-65, is the responsibility of the gun battery in either tractor-drawn or railway seacoast artillery. Each gun battery is allotted one time interval apparatus EE-85, one line connector unit EE-87, and five time interval signals BE—65, in addition to the necessary number of storage batteries.
    (2) Location.—(a) Time interval apparatus EE-85 is installed in the plotting room*, in a convenient and safe place, preferably in a place which allows space for associated equipment and which also is easily accessible to the telephone strip into which come readers’ telephone circuits. Line connector unit EE-87 is installed in the plotting room adjacent to the EE-85 (fig. 14).
    (6) Time interval signals BE-65 are installed at gun positions and in the plotting room in the manner best suited to assure that firing crews of all guns and range and fire-control crews will hear all signals easily. This arrangement may be for a BE-65 at each gun, one for two guns, etc., depending on distances between guns and the decision of the battery commander. In addition there should be at least one time interval signal BE-65 in the plotting room (fig. 14). The one BE-65 in the plotting room provides time interval signals for the plotting room stations of range, deflection, and battery order nets, while those at the guns provide signals for the gun position stations of these same nets. For this reason it is not obligatory to superimpose tone on telephones to these stations (fig. 14).
    (3) Connection.—(a) Both time interval apparatus EE-85 and line connector unit EE-87 are connected to the same 12-volt battery power supply. Care must be taken to connect the battery to the correct
    * The plotting room may be a tent, a railway car, or any other predesignated location.
    21
    TM 11-433
    5
    SIGNAL CORPS
    A r	a '
    II	------1	------
    rnzn 1	9 I	Armsdtem
    ।	\bd-7! I I	A rm setter	o nyn
    -----H feeder		B'Reader	L^.. J. J -----I flz3pottmr	X	S'Spotter
    H------------------I
    ---- I
    Order Net j
    Gp. Order ! flattery |5/>.5A| -o d^~ j	? o U ? o ? q ' '	? o
    Q>p, Bl \\5witchb'rd r^dl (> I Parge Het |____[_____|_____J
    &p. fl2- I	__°\^ I Peftect/on Het	,_____
    t"	______ I__________Order A/et_
    ----------- ।	tttow ters__I—,—I— T7me /rferva/ S/ffea/
    !	An. An.
    Corr Perc. 0-1-
    I/A.	Cord	।
    !	VTf\
    T/me/nterva/ tyC/. __
    |	S/gna/ BE-65	j ”
    I	TLA. EE-85 |T
    L.C.U.EE-87	-----
    L------- ----- J	TL.34-55
    P/Otf//7g Poo/D
    Figure 14.—Time interval equipments in mobile seacoast artillery.
    22
    TM 11-433
    TIME INTERVAL APPARATUS, ETC.	5
    binding posts as designated plus or minus or +12 VOLTS— on the EE-85 and EE-87.
    (6) The binding post of the EE-85 marked C and the one required
    L//7& f
    L/neZ
    L//?e3
    7e/e/?/7o/7es
    7e/e/2/7o/7es
    I O| O|	f
    --r ++f r
    'do—---	05 5o	x
    ,_____~ ,	O--------OD	<90	£
    IipS	— F[ M$q
    fE/.....................................J
    /z+ L_------------------------------------------------K
    Sforage	f-C.U. EE~87	7. /A. EEE5	+
    -daffert/	k K.S-
    ---------------------—I--125“*---------------------------> --------------------- ----------------•—	----A--A/V---	'
    MASTER ONE SECOND	GOV.
    TL - 3454	TIMING CONTACT	--->	---
    CONTACTS
    31
    Figure 19. Time interval apparatus EE-86-A—circuit diagram.
    TM 11-433
    TIME INTERVAL APPARATUS, ETC.	9
    TM 11-433
    9-10
    SIGNAL CORPS
    d.	Action and adjustments of the cam-contactor assemblies of the EE-86-A are similar to those of the EE-56. However, the importance of the adjustments is reduced by use of the master 1-second timing contact. The master 1-second timing contact cam (fig. 3) is driven at one revolution per second, through a worm gear, by the same worm which drives the cam-arbor drive worm gear. The position of the master cam on its shaft is such that, if necessary adjustments are made on the cam-contactor assembly, all contacts which are actuated by disk cams close and open before the corresponding operation of the master 1-second timing contact. The master cam is designed so that it will hold the master contact closed until after any or all of the time interval circuits, which were closed that particular second, are opened by the disk cam projections (fig. 3). The contact is closed by the raised portion of the master cam which operates the contact spring, the spring opening the contact.
    e.	From d above it is seen that when any disk cam closes the contact of its circuit for any particular second, that circuit is completed by the master contact and opened by the disk cam contact. Thus the master cam assures the accuracy of every time interval, and the cam-contactor assembly adjustments determine the length of contact closure. As long as the governor is correctly adjusted with the stroboscopic tuning fork, the time interval is accurate because of the master cam. The time intervals remain constant over a long period because of the carefully adjusted motor speed.
    10. Time interval apparatus EE-85.—a. The clock, or electromagnetic motor, of time interval apparatus EE-85 operates the motor contact, its own driving circuit contact, the auxiliary contact, the contact which completes the driving magnet circuit, and also the time interval program circuits (fig. 20). In the stopped position of the clock, the mechanism holds the motor contact closed so that when the apparatus is turned on and battery applied, the circuit is completed through the electromagnet, giving an impulse to the bar. The contact-operating mechanism is so constructed that the contact is closed once for each complete oscillation of the bar and weight, the time of oscillation being 1 second. The capacitor and resistor bridged in series across the motor contact prevent electrical interference with radio and other communications.
    b.	The auxiliary contact remains closed approximately 0.4 second during each 1-second oscillation of the clock. Each time it closes it completes one circuit through battery, switch, and diiving magnet; another circuit to common connection C and 1-second interval binding posts 1 through battery and switch, which provides the 1-second interval direct from the auxiliary contact; and all circuits to the com-
    32
    TM 11-433
    10
    TIME INTERVAL APPARATUS, ETC.
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    Q^Z/ 0FF	ltaU1 Jo	CA-n7ziT tc/HTM0	CLOCK
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    ______8’R____________________________________________
    ____________44" sq. x (Mb" long, _do„____________________________________
    with spring, 2 per set.
    b. Frame.
    1 4H3056/28_____ Bracket________ Brass, black oxidized finish, 2J4" Motor mounting bracket____________________ 20.001D3.
    long x UMb" wide.
    1 _______________ Support_______ Tobin bronze, black oxidized finish, Support and bushing for shaft of _______ 20,001D3.
    15J44" long x %e" diam.	worm wheel and containing drive
    pinion.
    43
    TM 11-433
    17
    SIGNAL CORPS
    c. Contacts.
    Drawing no.
    See flg- Stock no.	Name	Description	Function	Mfr. —---------------------—
    D0-	.	(Mfr.’s) , (Sig. C.)
    17 4H3056/40_____ Holder_______ Brass, brass oxidized finish, 2‘Ms" Mounting frame for contact assem- ---- 20,001D4.
    x x 12%2" high.	bly.
    17 _______________ Screw_______ Brass, 2" long, threaded full length, Fastens holder to wooden base_______ 20.001D4.
    0.1894" diam. x 32 threads per inch.’
    17 _________________ do________ Brass, black oxidized finish, 2J4" Fastens holder to wooden base and ----- 20,001D4.
    long, threaded IM" at 32 threads receives cord connecting lower per inch, 0.1894" diam., end slotted contact strip to common connec-and drilled.	tion.
    17 _______________ Grommet_____ Hard rubber,154 s" long, #9 drill 	Insulates screw from holder----------- 20,001D4.
    17 4H3056/47______ Rocker arm__ Brass, black oxidized finish, l‘Ms"	Pivots on holder at stroke of cam ----
    long by J4" wide.	projections, causing contact to
    make.
    17 _______________ Striking block_ Medium hard steel, black oxidized Receives stroke of cam projections__ 20.001D4.
    finish, Wx J4"x ‘Ms"long.
    17 4H3056/51______ Bushing_____ Bakelite or micarta, 14" long, #43 Insulator for controller plate contact -- 20,001 D4.
    drill.	block screw.
    17 4H3056/52________ do________ Bakelite or micarta, W long, #43 Insulator for contact strip screw______ 20,001 D4.
    drill.
    17 ___________________do__i____ Brass, Ms" long, #52 drill_ Bearing for rocker arm pivot pin------------- 20.001D4.
    17	4H3056/54______ Strip_______ Nickel silver with platinum points,	Lower contact strip, fastened to	.____ 20.001D4.
    2Ms" x J4" wide.	rocker arm.
    17	4H3056/55______ Spring______ 0.0115 phosphorus bronze spring	Retractile spring on rocker arm __ ----- 20,001D4.
    wire, M" long.
    17	4H3056/56______ Screw_______ Hard brass, black oxidized finish,	Bumper adjustment screw_________________ 20,001D4.
    knurled head, #8-32, ‘Ms".
    17	4H3056/57_—________do________ Hard brass, black oxidized finish	Main contact point and contact ad- --- 20,001 D4.
    with platinum point, knurled justment screw.
    head, #8-32, ‘Ms".
    17	4H3056/58______ Nut_________ Hard brass, black oxidized finish,	Lock nut for bumper	and contact -------- 20.001D4.
    std. for #8-32 screw.	screw adjustments.
    17	4H3056/59______ Washer______ M" and ■%" faces by Ms" thick,	Leather bumper__________________________ 20,001D4.
    leather.
    44
    TM 11-433
    TIME INTERVAL APPARATUS, ETC.	17
    17
    17
    17 .
    _____________________I____________। _________________________I__________________________I I I____________________________
    d. Contact controller.
    1 -------------- Spindle------ Brass, black oxidized finish, 3Ji" x Hollow spindle upon which disks _____ 20.001D5.
    1*^2" diam.	and gears are mounted.
    1 -------------- Disk--------- Brass, black oxidized finish, 9" diam. 10-, 15-, and 20-second cam disks, _ 20,001D5.
    x thick.	upon which cam groups are
    mounted.
    1 ------------------do-------- Brass, black oxidized finish, 9" diam. 30-second cam disk, pinned to _____ 20,001D5.
    x W thick.	spindle.
    1 -------------- Bushing------ Brass, black oxidized finish, W' long S pacers between disks______________ 20,001D5.
    x #9 drill.
    1 ------------------do-------- Brass, black oxidized finish, H" long Spacers between gear and 10-second _ 20,001D5.
    x #9 drill.	disk.
    1 -------------- Rod---------- Brass, S'Me" long x 0.1894" diam., Mounts disks and gear on spindle_______ 20,001D5.
    32 threads per inch, threaded J4" each end.
    1 -------------- Shaft-------- Cold rolled steel, 5J4" x M" diam_ Stationary shaft on which entire ______ 20,001D5.
    cam-arbor assembly revolves.
    1 ------------... Pin--------- Brass, J4" long x 0.096" diam_____ Pin gear and 30-second disk to ....____ 20.001D5.
    spindle.
    1 4H3056/85----- Block-------- 3-tooth block, medium hard steel, 3-projection program group cam__________ 20,001D5.
    O/i" x 1%2" x J4" thick.
    1	4H3056/86----- Screw-------- Brass, black oxidized, knurled head,	Fasten program cams to disks________ 20,001D5.
    #10-32 x >Me".
    1	4H3056/87----- Block.. ----- Single-tooth block, medium hard	Single projection program cam_______ 20,001D5.
    steel, IW' x O/i" x /" thick.	,
    1	-------------- Bearing------ Annular ball bearing, bore 0.2756",	Bearings for rotation of spindle ____ 20,001D5.
    diam. 0.8661", width 0.2756".	about stationary shaft.
    4H3056/60----- Pin----------- Steel, W long	_____ Rocker arm pivot pin________________ . ...	____ 20,0011)4.
    4H3056/61------ Cord--------- Copper braid with terminals, 2" long. Connection between lower contact _ . _ 20,001D4.
    strip and common connection bus.
    --------------- Plate-------- Bakelite or micarta, 3Jk" x 21 Me" x . Insulates holders from brass frame _ . ... _ 20,001D4. thick.
    45
    TM 11-433
    17
    SIGNAL CORPS
    46
    e. Governor.
    Drawing no.
    See fig. । stock no	Name	Description	Function	Mfr.
    no.	’	(Mfr.’s) (Sig. C.)
    16	4H3056/91_____ Frame________ Aluminum alloy, 2" ong x IMe"	Rotating governor fly-ball support--------- 20,001D6-6.
    high x M" wide.
    16	4H3056/92_____ Strip________ Steel, nickel dip finish, 1M«" x 1"	Lower contact strip------------------ 20,001D6-6.
    x J4" wide.
    16	4H3056/93_____ Pin__________ Stubs steel, W x 0.041" diam_ Pivot pin for lower	contact strip, -------- 20,001D6-6.
    fastening it to governor frame.
    16	4H3056/94_____ Fly-ball_____ Brass, nickel dip finish, Me" diam.	Governor fly-ball-------------------- 20.001D6-6.
    16 4H3056/95_____ Contact__.___ Steel, blue finish, with tungsten con- Lower governor contact------------ 20,001D6-6.
    tact; 2%4" long x W' diam.,
    threaded 48 t. p. i.
    16	4H3056/96_____ Nut__________ Hard brass, nickel dip finish, hex.	Lower contact nut---------------------- 20,001D6-6.
    nut, #5-48 x pis" thick.
    16	4H3056/97_____ Screw________ Headless setscrew, #6-32 x Ms"; iron,	Fastens rotating support	to motor - 20,001D6-6.
    nickel dip finish.	shaft.
    16	4H3056/98_________do________ Brass, nickel dip finish, slotted head,	Governor spring tension adjust- - 20,00106-6.
    #5-48 x J4".	ment screw.
    16	4H3056/99_____ Spring_______ 0.016" spring steel wire, IM" long- Governor fly-ball tension spring----- 20,001D6-6.
    16 4H3056/100____J Lever_______ Sheet brass, nickel dip finish, W x Governor spring tension adjusting --- 20,001D6-6.
    W x M" wide.	lever.
    16	4H3056/101_____ Bushing_____ Hard rubber grommet, W' long x	Insulates	upper contact screw of ---- 20.001D6-6.
    Me" drill.	governor.
    16	4H3056/102________do________ Hard brass, black oxidized finish, M"	Receives	upper contact screw of ---- 20,001D6-6.
    long x #28 drill.	governor.
    16 _______________ Terminal____ Hard brass, nickel dip finish, 1" x	Provides	connection for stationary - 20,00106-6.
    M" x 0.034" thick.	contact.
    16	4H3056/104____ Washer_______ Hard rubber, M" diam. x M2" thick	Insulates upper contact	screw from ---- 20.001D6-6.
    governor bracket.
    16	4H3056/106_____ Screw_______ Hard brass, black oxidized finish	Upper contact screw-------------------- 20,001D6-6.
    with platinum point and knurled
    head, #8-32 x IM"
    TOAS STATE COLLEGE FOR WOMEN
    TIME INTERNE APPARATUS, ETC.
    TM 11-433
    17
    47
    16 -------------- Nut-------- Hard brass, black oxidized finish, Locks upper governor contact screw_ 20 001D6-6
    knurled head, thick x #30
    drill.
    16 4H3056/108--- Contact springs. Phosphorous bronze, black oxidized Governor shaft contact spring_	20 001D6-6
    finish, in/is" x fte" x 0.018" thick.
    16 4H3056/109---- Bushing---- Bakelite or micarta, l^s" sq. x J4" Insulates governor bracket from _'	20,001D6-6.
    thick.	frame of apparatus.
    16 4H3056/110-------do------- Hard rubber grommet, W long x #2 Insulates governor mounting screw ___ 20.001D6-6.
    drill.	from frame of apparatus.
    /. Shaft.
    1 4H3056/120-124- Shaft------ Steel------------------ Shaft connecting motor and gover-
    nor.
    ______________________________________________________________________________________________
    g. Coils.
    1 4H3056/130-35- Coil-------- 100-ohm resistance coil, complete Governing resistance in series with
    and assembled.	motor field.
    1 4H3056/131, 133, 134-do---- 100-ohm resistance coil with shell Governing resistance in series with
    and block.	motor field.
    1 4H3056/133--------do------- 100-ohm resistance coil- Governing resistance in series with
    motor field.
    h. Motor binding post.
    1 4H3056/140-44- Binding post- Receives pin-type terminal- Provide connection for lead direct
    from motor; wired to binding posts
    i	t,, ,	„	to which battery is connected.
    i	o °C	Rubber, 9%" x 2J4" x W thick- Mounting block of terminal strip_
    1 4H3056/151/1-- Screw-------- Knurled head---------... Binding post screw_________________________
    TM 11-433
    17-18
    SIGNAL CORPS
    48
    i. Gears.	-	_____________ ____________
    Drawing no.
    See fig. stock no	Name	Description	Function	Mfr. ——————
    no.	’	(Mfr.’s) (Sig. C.)
    x	Gear_______ Brass, black oxidized finish_ Driving gear for cam-arbor assembly--
    1 4H3056/161___ Worm_______ W long----------------------- Motor shaft worm---------------------
    1 4H3056/162___ Shaft______ long-------------------- Gear and pinion shaft---------------------
    1 4H3056/163___ Gear_______ Brass, 1.6875" pitch diameter, 80 Worm gear------------------------
    teeth.
    18. Time interval apparatus EE-86-A.—a. Motor.
    3	_____ Motor______ Series wound, 30-volt d-c, 1,380-rpm, Prime mover------------------
    ball bearing, 20° C. rise.
    3	____________ Brush______ Carbon brush____________ For motor---------------------------------
    3 _____________ Spring_____ Flat spring_____________ Brush spring------------------------------
    3 _____________ Armature_______________________________________________________________________
    3	____________ Wicking_____________________________ For grease cup----------------------------
    3	Capacitor__ 0.1/zzf_________________ Prevents radio interference from ---------
    motor.
    3 _________________do______ 0.1/Mf______________________d0--------------------------2----------
    TM 11-433
    TIME INTERVAL APPARATUS. ETC.	18
    b. Frame.
    3 --------------- Support------- Tobin bronze, black oxidized finish _. Support and bushing for shaft of _____
    worm wheel and containing drive pinion of cam-arbor.
    c. Contactor assembly.
    17 --------------- Screw-------- Brass---------------------- Fastens holder to wooden base____________________
    17 -------------------do------------do---------------------- Fastens holder to wooden base and ______
    receives cord connecting lower contact strap to common connection.
    17 --------------- Grommet------ Hard rubber---------------- Insulates connection screw from _________________
    holder.
    17 --------------- Rocker arm--- 303 stainless steel________ Pivots on holder at stroke of cam _______________
    projections, causing contact to
    make.
    17 ....----------- Bushing------ Hard rubber________________ Insulates contact strip screw____________________
    17 --------------- Strip-------- With tungsten contact---„-- Lower contact strip, fastened to ________________
    rocker arm.
    17 --------------- Spring------- Spiral, beryllium copper___ Retractile spring on rocker arm__________________
    17 --------------- Screw-------- Fillet head with slot______ Bumper adjusting screw___________________________
    17 -------------------do-------- Fillet head with slot, tungsten con- Stationary contact point and con- ______
    tact.	tact adjustment.
    17 --------------- Washer------- Leather-------------------- Rocker arm bumper________________________________
    17 --------------- Bearing------ 303 stainless steel--------- Bearing for rocker arm pivot pin________________
    17 --------------- Cord--------- Copper braid with terminals_ Connecting cord for contact maker_______________
    17 --------------- Plate-------- Bakelite------------------- Insulates holders from frame_ __ ________________
    49
    TM 11-433
    18
    SIGNAL CORPS
    d
    Drawing no.
    See fig. Stock no	Name	Description	Function	Mfr.
    no-	’	(Mfr.’s) (Sig. C.)
    3	_____________ Spindle_____ Brass, black oxidized finish_ Hollow spindle upon which disks ..- --------
    and gear are mounted.
    3	Disk ___________do________________________ 5-> 10-, 15-, 20-, and 30-second disks, ----
    upon which cam groups are mounted.
    3	do	_____________ 60-second disk, pinned to spindle--------------
    3	(j0	do	______________ 40-second disk_________________________________
    3 ___________________do_______ Steel, bright finish______ 1-second disk----------------------------------
    3 _______________ Bushing_____ Brass, black oxidized finish- Spacers between disks-----------------------
    3	___ do______________do________________________ Spacers between gear and 1-second ----------
    disk.
    3	Rod_________ Brass____________u_________ Holds gear and disks on spindle, -------------
    except 40-second disk.
    3 _______________ Shaft________ Cold rolled steel_________ Stationary shaft on which entire --------------
    cam-arbor assembly rotates.
    3	______ do______________do_____________________ Idler shaft of drive of 40-second disk---------
    3	________ Pin__________ Brass____________________________ Pin 60-second disk and gear to ---------
    spindle.
    3 ___________________do________ Brass, taper turned_______ Pin hubs of gears to idler shaft---------------
    3 _______________ Block________ 3-tooth block, medium hard steel_ 3-projection program group cams for ----
    10-, 15-, 20-, 30-, and 60-second
    disks.
    3 ___________________do____________do_____________________ 3-projection program group cam for ------------
    40-second disk.
    3 ___________________do________ Single-tooth block, medium hard Single-projection program cams for -------
    steel.	5-second disk.
    3 _______________ Screw________ Knurled head______________ Fasten program cams to disks-------------------
    3 _______________ Bearing______ Annular ball-bearing______ Bearings for rotation of spindle about --------
    stationary shaft.
    3 _______________ Gear_________ Steel_____________________ Cam-arbor driving gear-------------------------
    3	_______________do____________do. ___________________ Turned by cam-arbor, drives idler -------------
    assembly.	1
    '. Contact controller.
    50
    TM 11-433
    TIME INTERVAL APPARATUS, ETC.	18
    51
    3 --------------------do------------do----------------------------- Driven gear of idler assembly______________
    3 --------------------do------------do----------------------- Driving gear of idler assembly, _________________
    drives 40-second disk.
    3 --------------------do------------do----------------------- Gear on 40-second disk spindle __________________
    3 ---------------- Frame-------- Brass----------------------- Supports idler assembly__________________________
    3 ---------------- Clamps-----------do----------------------- Fasten idler shaft to frame_ _ _
    e. Governor.
    3 ---------------- Cover-------- Sheet steel stamping, black_ Protecting cover of governor as- ________________
    sembly.
    3 ---------------- Frame-------- Aluminum-alloy-------------- Rotating governor fly-ball support_______________
    3 ---------------- Strip-------- Steel, nickel dip finish---- Holds clutching device which actu- _______________
    ates lower contact strip.
    3 --------------------do------------do----------------------- Lower contact strip______________________________
    3 ---------------- Pin---------- Steel---------------------- Pivot pin for strip on governor fly- _____________
    ,	ball support.
    3 ---------------- Fly-ball----- Brass, nickel dip finish____ Governor fly-ball________________________________
    3 -------------— Contact-------- Tungsten-------------------- Lower contact point______________________________
    3 --------------------do------------do----------------------------- Upper contact point________________________
    3 ---------------- Spring------- Spring steel, spiral-------- Governor fly-ball tension spring_________________
    3 --------------------do------------do----------------------- Lower contact tension spring__________________
    3 ---------------- Screw-------- Hard brass, black oxidized finish_ Upper contact screw holding upper
    contact point.
    3 --------------------do-------- Brass, dull white nickel finish_ Adjusts lower contact spring tension-________
    3 ---------------- Strip-------- Steel, nickel dip finish____ Pivoted on stationary arm, moved
    by screw adjusting lower contact spring.
    3 --------------------do------------do----------------------- Stationary arm upon which lower _________________
    contact spring adjustment strip is mounted.
    3 ---------------- Resistor----- 125-ohm--------------------- Governing resistance in series with _____________
    motor field.
    3 --------------------do-------- 1000-ohm------------------------ Prevents radio interference of con- _________
    tact arc.
    TM 11-433
    18
    SIGNAL CORPS
    52
    /. Shaft.
    Drawing no.
    See fig. Stock no	Name	Description	Function	Mfr.
    no-	(Mfr.’s) (Sig. C.)
    3	Shaft__	_ Steel___________________ Connects motor shaft to governor - -------
    fly-ball support.
    g.	Master cam assembly.
    3	Gear.	... Fiber__________________ Worm gear driven from worm on -------------
    motor shaft.
    3	Shaft_________ Steel_________________ Shaft between worm gear and cam- ----------
    3	__ Cam. ______ . Brass____________________ Actuates master 1-second contact-----------
    3 ______________ Contact strip_ Steel_________________ Holds moving contact-----------
    3	______do_______ Steel..._________________ Holds stationary contact-------- ----------
    3	__________ Screw______ Brass____________________ Stop for moving strip of contact-----------
    h.	Tuning fork.
    3 ______________ Fork________ Chromium steel alloy, 46 vibrations Provides correct adjustment of gov- Riverbank -
    per second ±0.05%.	ernor.
    i.	Panel assembly.
    2_____________________Binding_ Bakelite cap and base and brass Binding posts for time interval con- -
    screw.	nections and battery connections.
    2______________________________ Switch... Toggle, with silver plated contacts.Starting switch____________________
    TIME INTERVAL APPARATUS, ETC.
    TM 11-433
    18-19
    53
    j. Box assembly.
    3 -------------- Binding posts- Bakelite cap and base and brass Provide connection for leads direct ___
    screw.	from motor; wired to binding posts
    to which battery is connected.
    2 -------------- Clasp--------- Spring clasp, nickel plated_ Fasten cover to base____________________
    3 -------------- Wire-------- “Ravine” #18 AWG, stranded, All wiring, except busses_ Belden__________
    tinned, rubber covered, braided, and lacquered.
    k. Worm drive.
    3 -------------- Worm—...... Fiber--------------------- Mounted on motor shaft to drive ______________
    worm wheel.
    3 -------------- Worm gear-'— Fiber-------------------- Mounted on shaft which has pinion ___________
    cut on it.
    3 -------------- Shaft------- Steel-------------------- Upon which worm gear is mounted ______________
    and on which pinion is cut, to drive cam-arbor assembly.
    19. Time interval apparatus EE-85.
    5 |------------- Clock------- Electro-magnetic motor, 10-12 v., d-c_. Drives time interval mechanism_ W &T_ SK-3917-B.. SC-D-3841-B.
    a. Box assembly (sc-d-3842-b).
    4 -------------- Hinge------- Brass, dull white nickel finish, Hinges box top to box_________________ V-R_ 1221_ SC-D-3843-C.
    13Mo" long x IMo" wide.
    5 -------------- Bracket------- Brass angle, dull white nickel finish, Support binding post panel____ SC-D-3843-C.
    W x y2", #12 B & S ga.
    4 -------------- Strap clamp- Brass, dull white nickel finish, IMs" Clamps carrying strap_l__________ SC-D-3843-C.
    x 2" x Me".
    TM 11-433
    19
    SIGNAL CORPS
    54
    a. Box assembly—Continued
    Drawing no.
    SeeflS- Stock no.	Name	Description	Function	Mfr. '777	7777
    no.	(Mfr.’s) (Sig. C.)
    5	______ Disk mounting... Brass, dull white nickel finish, iMo" Mounting for spare disks---- SC-D-3843-C.
    4	Hinge______ Brass, dull white nickel finish, 1W Hinges shutter to cover- V-R- 1221- SC-D-3844-C.
    long x Ms" wide.	r>_o-H, anodized,	Provides adjustment of contact --- SC-D-3854-D.
    W' x W x Hz" thick.	spring pressure against disks.
    6 ______________ Terminal	block	Hard brass, gold plated, 1Hz" x J4"	Hold adjustable stationary contact -  SC-D-3854-D.
    (1. h.).	x H".	and terminal of 90-sec. arbor con-
    tactor assembly.
    6 _______________ Terminal block _do_______________-____- Hold adjustable stationary contact ___________ SC-D-3854-D.
    (r. h.) J4".	and terminal of 120-sec. arbor con-
    tactor assembly.
    6 ______________ Spring shoe__ 302 stainless steel, IMa" x M" x Hz" Makes pressure contact with disks--- SC-D-3854-D.
    thick.
    6 ______________ Strap________ Brass, gold plated, 1H" x 1Mb" x #24 Straps moving contact connections -- SC-D-3854-D.
    B & S ga.	together to get common connec-
    tion for 90-sec. arbor.
    6 __________________do_________ Brass, gold plated, lH"x'Mb" x #24 Straps moving contact connections ___ SC-D 3854-D.
    B & S ga.	together on armature to get com-
    mon connection for 120-sec. arbor.
    6 ______________ Contact spring. __ Beryllium copper, gold plated, Mounting for moving contact___________ SC-D-3854-D.
    19m" x J4" x #33 B & S ga.
    6 ______________ Contact screw_ Beryllium copper, gold plated, M"	Mounting for stationary contact, ----- SC-D-3854-D.
    long x #6-32 thread.	placed in terminal block.
    ________________ Contact______ Palladium, Mb" thick x diam_ Moving contact__________________________------ SC-D-3854-D. 6 ______________ ___do________ Palladium,Hz"diam.x0.025 thick... Stationary contact_________________ SC-D-3854-D.
    6 ______________ Pawl support_ Brass, dull white nickel finish, 1H" Mounted on post, supporting pawl ____ SC-D-3854-D.
    x Hz" x M".	and pawl spring of ratchet wheel.
    58'
    TM 11-433
    19-20
    TIME INTERVAL APPARATUS, ETC.
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    59
    TM 11-433
    20
    SIGNAL CORPS
    Transformer C—231 assembly.

    Drawing no.
    See fig. Stock no	Name	Description	Function .	Mfr.
    no-	(Mfr.’s) (Sig. C.)
    8 ______________ Transformer_ Type C-231 _____________ Steps up voltage of hummer output, ------- SC-D-1614-C.
    placing it on telephone lines.
    8 3Z10104_______ Terminal____ TM-104, brass (tinned), front ear ..	Transformer terminal------------- RL-D-5035.
    b. Box assembly.
    7 ______________ Strap clamp_ Brass, dull white	nickel finish, 2"	Fastens carrying strap--------- SC-D-3721-C.
    x IJde" x VW thick.
    8 ______________ Support_____ Aluminum alloy,	2%2"x l%"x#14	Supports relay---------------  SC-D-3721-C.
    B & S ga.
    8 _________________do________ Aluminum alloy, 3M«" x 2716" x #14 -do-------------------------------- SC-D-3721-C.
    B & S ga.
    8 ______________ Transformer Brass, dull white nickel finish. 10%a" Strap transformers in place----- SC-D-3721-C.
    strap.	x 94" x J4" thick.
    7 ______________ Fringe spring_ Steel, nickel plated, #14 music wire, \ Shutter hinge spring-------- SC-D-3721-D.
    50 turns.
    7 ______________ Hinge_______ Brass, dull white nickel finish, #1221,	Hinges shutter to cover- V-R- 1221--- SC-D-3722-B.
    Ty long x iye" wide.
    7 _________________do________ Brass, dull white nickel finish, #1221,	Hinges cover to box- V-R-----	1221--- SC-D-3722-B.
    IS^ie" long x IMe" wide.
    8 ______________ Bracket_____ Brass angle, dull white nickel finish, Supports panel assembly. ------ SC-D-3722-B.
    y x y x #12 B & S ga.
    7 ______________ Catch_______ #01796F brass flush hasp,nickel finish Fastens cover to box- - Eagle-	01796F- SC-D-372O-B.
    7 ______________ Recess bumper...	Rubber tip #02_______ Cushions on bottom and back of box.	HS--- SC-D-3720-B.
    8 ______________ Washer______ Countersunk, brass #145, nickel fin-	Fastens ends of transformer straps	Simpson. - SC-D-3720-B.
    ish.	to box.
    7 ______________ Strap_______ OD cotton webbing l"x 1.33 oz.x 20"	Carrying strap--------------   SC-D-3720-B.
    long.
    60
    TM 11-433
    20-21
    TIME INTERVAL APPARATUS, ETC.
    Panel assembly.
    8 -------------- Clip-------- Brass, wide x #20 B&S ga. thick_ _ Fastens laced wire cable to plate___._______ SC-D-3723-B.
    7 -------------- Binding post- .. TM-195, brass, dull white finish, Provides connection to line circuits _ SC-D-1132,
    knurled cap.
    ‘ ------------------do------- TM-195, brass, dull white nickel Provides connection to relay circuit, _ SC-D-1132.
    finish, knurled cap.	from time interval apparatus
    EE-85.
    7	3Z209--------- do---------- TM-109, bakelite, knurled cap and	Provides connection for battery	__________ SC-D-530.
    base.	leads.
    8	3D166--------- Capacitor--- CA-166, 0.1 ^f, fixed, paper, 200-v.,	Prevent drain from telephone sys-	Tobe___ SC-D-512.
    I	d-c.	tern batteries.
    8 3Z9913-------- Terminal — TM-13, eye clip, oval, brass (tinned). For binding posts for battery leads_ RL-A-320.
    8	------------- ---do--- --- #4012-------,---------------- For binding posts of line circuits_ P-M___ SC-D-3723-B.
    8 ----u--------- ....do---- #4012----------------------- For binding posts of relay circuit_ P-M_____________ SC-D-3723-B.
    7 -------------- Key. ------ 3-position, #479EP---------- Controls volume of hummers________ W. E_____ SC-D-3723-B.
    7 -------------- ---do------- 3-position, #479G---------- Switches hummers on and off_ W. E___________ SC-D-3723-B.
    8 -------------- Resistor---- Type F-l/3, 20,000-ohm, J4-w- Regulates hummer volume_ IRC______________ SC-D-3723-B.
    8 -------------- _...do------ Type F-l/3, 50,000-ohm, 14-w_ ..l.do__________________________ IRC______ SC-D-3723-B.
    21. Time interval signal BE-65.
    9 4H5005-------- BE-65------- Time interval signal BE-65- Produces signals at intervals deter- _______ SC-D-3827-A.
    mined by time interval apparatus
    EE-85, used by mobile seacoast
    artillery.
    10 -------------- Capacitor--- 6-#tf, 400-v., FU-748, PC-753- Acts with magnet coil to make	its	C-D___ SC-D-3827-A.
    action more positive.
    10 -------------- Relay------- Model 2C with coil #38--- Closes magnet coil circuit_ KE_______________ SC-D-3827-A.
    10 -------------- Terminal---- Brass. #903------------------- For capacitor binding posts_ P-M________ SC-D-3827-A.
    61
    TM 11-433
    21
    SIGNAL CORPS
    Box assembly.

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    62
    TM 11-433
    TIME INTERVAL APPARATUS, ETC.	21
    9 --------------- Recess bumper... Rubber tip #02--------- Cushions on bottom of box_... HS________ 8C-MKS-T1
    9	Handle------ Steel, #482, size #2------- For carrying box----------- Stanley_____________ SC-D-3828-C.
    b. Horn assembly.
    11 -------------- Diaphragm---- Nickel silver, 4J4«" diam. x #19 B&S Vibrates with action of magnet ________ SC-D-3833-C.
    ?a-	armature.
    11 --------------- Cone assembly... 2 rings and cone of aluminum alloy Intensifies sound of diaphragm_ SC-D-3833-C
    welded together to form a horn,
    5J4" diam. x 5J4" long (approx.),
    11 ----------_--- Cartridge---- Brass, dull white nickel finish, Fits in drilled slots at sides of base, __ SC-D-3833-C
    7/i" x W diam.	receiving screw which fastens horn
    assembly to side of box.
    ..................... Stud--- Brass, dull white nickel finish, 1-H" Fastens arch to base, fitting into _ SC-D-3833-C
    x 5io"-32 thrd.	adjusting screw.
    Arch--------- Brass, dull white nickel finish, 5?4" Mounting for contact assembly	SC D 3833 C
    x 0/2" x W x W thick.
    11	Screw-------- Brass, dull white nickel finish, 1J4" Adjusts contacts, moving arch	qo n qsqq r
    x H"-27 thrd.	n 3833
    11 -------------- Nut---------- Brass, dull white nickel finish, ^6" Fits on adjusting screw of arch_ SC-D-3833-C
    thick hex., x %"-27 tap.
    11 -------------- Washer------- Brass, dull white nickel finish, 1H"_do	on OOOQ n
    o. d. X 1. d. X Hfi .
    11	Nut--------- Brass, dull white nickel finish Fastens armature to diaphragm	qn r> r
    long x ^"-27 thrd., x #10-32 tap.	bC-D-3834-C.
    11 -------------- Washer------- Brass, dull white nickel finish, ..do	Qr, T, „
    O.d.x.377"i.d.x%4".	SC-D-3834-C.
    Armature----- Steel, W' nickel plate, IJi" x x Magnet armature which actuates _'.________ SC-D-3834-C.
    ..	%z".	diaphragm.
    Post--------- Brass, dull white nickel finish, 2J4" Actuated by armature to break con- __ SC-D-3834-C.
    x #10-32 thrd.	tact, adjustable for contact spac-
    11 ing-Bumper-------------------------- XX Black phenolic rod, W x %2" Fits on end of post which breaks __________ SC-D-3834-0.
    diam.	contact.
    Screw------ Brass,	dull white nickel finish, slot-	Adjusts stop of contact spring	qo n 8834 r
    u	ted, W x #60-40 thrd.	SC n 3834-U.
    Nut..............	Brass, dull white nickel finish, MV'	Locks adjustment of stop of contact __ SC-D-3834-0
    I thick x #6—40 tap.	spring.
    63
    TM 11-433
    21
    SIGNAL CORPS
    . Horn assembly—Continued.
    Drawing no.
    See fig. Stock no	Name	Description	Function	Mfr.	’
    no-	(Mfr.’s) (Sig. C.)
    -_________________---------______----------------------------------------------------------------------------------- U ________________ Plate--- Brass, dull white nickel finish, 3M2" Holds stop adjustment screw. --------- SC-D-3834-C.
    x M" x M2".
    H ___________________do_______ Brass, dull white nickel finish, %" Forms clamp on contact mountings - SC-D-3834-O.
    x Me" x Ms".	on arch.
    u _______________ spring______ Beryllium copper, M" x M" x Increases action of contact spring-------- SC-D-3834-0.
    0.020".
    n _______________ Contact spring. . Beryllium copper, IM" x IM" x Mounting for moving contact- ------ SC-D-3834-C.
    0.030".
    n _______________ Stop________ Beryllium copper, 1 Me" xM"x M"	Contact armature stop------------ SC-D-3834-C.
    x 0.040 ga.
    n _______________ Screw_______ Nickel silver, 3M4" x M2" x #6-32	Mounting for stationary contact.... - SC-D-3835-A.
    thrd.
    n _______________ Block_______ “LE” natural phenolic plate, 1" x	Part of contact mounting on arch, - SC-D-3835-A.
    M" x 1M2".	spacing.
    It __________________do_______ "LE” natural phenolic plate, 1" x ---do------------------------------- SC-D-3835-A.
    M" x Me".
    n _______________ Insulator___ XXX natural phenolic plate, 2M2/Z Insulates metallic parts of contact - SC-D-3835-A.
    x 1M2" x 0.050".	mounting on arch.
    11 ______________ Bushing_____ XXX natural phenolic tubing	Insulates long screws from metal -------------- SC-D-3835-A.
    long x M" o. d. x 0.196" i. d.	parts of contact mounting.
    11 ______________ ___do_______ XXX natural phenolic tubing, Ma" ----do------------------------------------ SC-D-3835-A.
    long x M" 0. d. x 0.196" i. d.
    11 ______________ Contact_____ Palladium, M2" diam. x Me" long.._ Stationary contact point----------- SC-D-3835-A.
    11 __________________do.._____ Palladium, M2" diam. x 0.025" Moving contact point------------------------- SC-D-3835-A.
    thick.
    11 ______________ Pin_________ Nickel silver #14 (0.064") B and S Goes through base and screw, fasten- -'- SC-D-3832-B.
    gage x IMe" long.________ing arch to base._________________I____________________
    c. Horn magnet assembly.	_______________
    11 ______________I Angle_____ Brass, dull white nickel finish, M" Forms base of magnet	..	...	--------- SC-D-3836-C
    x M" x IM" long x Me" thick.
    64
    TM 11—433
    21
    TIME INTERVAL APPARATUS, ETC.
    11 -------------- Clip-------- Nickel silver, M" x'Me" x 0.020"- Fastens winding to core	SC D 3836-C
    11	Sleeve------ Black “LE” phenolic tubing, 'Me"	Spool upon which winding is placed_ SC-D-3836-C
    sq. x 2M2" long x Mz" thick.
    11	Insulator--- “LE” phenolic plate, IMe" sq. x	Insulates winding from bottom head______ SC-D-3836-C.
    Mi".
    11 -------------- Head--------- “LE” phenolic plate, IMe" sq. x Holds winding in shape and insu- ____ SC-D-3836-C
    Mz".	lates it at top and bottom.
    d. Panel assembly.
    10	Spacer------- Brass, dull white nickel finish, IM"	Separates panel from base	SC D 3837	A
    x M" o.d. x 'Md" i.d.
    10	3Z252--------- Binding	post- TM-152, composition, knurled cap	Provides connection for battery leads _ SC-D-530
    and base.
    10	do------- TM-195, brass, dull white nickel Connection for line wires	SC D 1132
    finish, knurled cap.
    10 3Z9936-------- Terminal---- TM-36, eye clip, flat, brass_ For battery binding posts_________________ 10701B1.
    do-------- #4012-------------------- For line wire binding posts_ P-M______________ SC-D-3837-A
    e. Battery tray assembly.
    10 -------------- Battery support.. Black molded phenolic compound, Supports battery	ar r> qsqs_u
    XM-3510 black bakelite, 5M" x	D.3838-B.
    1M"xM".
    10	_ Insert ----- Brass, knurled, M" long x M" o.d. x Receives screws fastening supports _ SC-D-3838-B
    #6-32 tap.	to plate.
    do-------- Brass, knurled, M" long x M" o.d. x Receives threaded end of post in _ SC-D-3838-B
    #10-32 tap.	center of support.
    -------------- Clamp ------- Brass, dull white nickel finish, 5^2" Holds batteries on supports	sr r>
    x W x W wide x Me ga.
    10 ------------- Post _	--- Brass, dull white nickel finish, 3" x	Mounting for clamps	sr.n
    x 10-32 thrd.	B 3838~B-
    10	3Z9929-------- Terminal---- TM-29, spade clip, brass (tinned) .	For battery wires_________ 1O7O1R1
    Vire ------- #18 (0.0403") AWG x 6" long green	Connect batteries in series	and to Belden_1-------	SC-D-3838-B.
    wire, code “ravine”.	panel terminals.
    65
    SIGNAL CORPS
    TM 11-433
    Appendix
    ADDRESSES OF MANUFACTURERS
    Diehl		Diehl Manuacturing Co		Elizabethport, New Jersey.
    Emerson		The Emerson Electric Mfg. Co		St. Louis, Missouri.
    WE&M		Westinghouse Electric & Mfg. Co		Pittsburgh, Pennsylvania.
    Riverbank..	Riverbank Laboratories		Geneva, Illinois.
    Belden		Belden Manufacturing Co		Chicago, Illinois.
    W&T		Wallace & Tiernan Products, Inc		Belleville, New Jersey.
    V-R		Veeder-Root, Inc		Bristol, Connecticut.
    H S		Hammacher, Schlemmer & Co		New York, New York.
    Eagle		The Eagle Lock Co		Terryville, Connecticut.
    Waterbury.	Waterbury Brass Goods, Inc		Waterbury, Connecticut.
    A-H & H—	Arrow-Hart & Hegeman Electric Co.	Hartford, Connecticut.
    Eby		Hugh H. Eby, Inc		Philadelphia, Pennsylvania.
    P-M		Patton-MacGuyer Co		Providence, Rhode Island.
    Thiokol		Thiokol Corporation		Yardville, New Jersey.
    North		North Electric Manufacturing Co		Galion, Ohio.
    G. R		General Radio Co		Cambridge, Massachusetts.
    Simpson		Edwin B. Simpson Co		Brooklyn, New York.
    Tobe		Tobe Deutschmann Corporation		Canton, Massachusetts.
    W. E		Western Electric Co		Chicago, Illinois.
    IRC		International Resistance Co		Philadelphia, Pennsylvania.
    C-D		Cornell-Dublier Electric Corporation.	South Plainfield, New Jersey.
    K E		Kurman Electric Co		New York, New York.
    Stanley	The Stanley Works	 	 [A. O. 062.11 (7-10-42).]		New Britain, Connecticut.
    By order of the Secretary of War:
    G. C. MARSHALL,
    Chief of Staff. Official:
    J. A. ULIO,
    Major General,
    The Adjutant General.
    Distribution:
    IC andH4 (5);IC 11 (3).
    (For explanation of Symbols see FM 21-6.)
    U. s. GOVERNMENT PRINTING OFFICE: 1942
    66,
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