[Depression Position Finder M1]
[From the U.S. Government Publishing Office, www.gpo.gov]
V\| 3 4^5
Document
TM 9-1695
Reserve
WAR DEPARTMENT
TECHNICAL MANUAL &
ORDNANCE MAINTENANCE
DEPRESSION POSITION FINDER Ml
November 21, 1941
NQN-CKCULATING
NTSU LIBRARY
TM 9-1695
1—2
TECHNICAL MANUAL No. 9-1695
WAR DEPARTMENT, Washington, November 21, 1941.
ORDNANCE MAINTENANCE
DEPRESSION POSITION FINDER Ml
Prepared under direction of the Chief of Ordnance
Paragraph
General-------------------------------------------------------------------- 1
Description________________________________________________________________ 2
Operation__________________________________________________________________ 3
Inspection_________________________________________________________________ 4
Maintenance and repair----------------------------------------------------- 5
Care and preservation_____________________________________________________ 6
Accessories________________________________________________________________ 7
Page
Appendix. List of references---------------------------------------------- 30
1. General.—a. Purpose.—This manual is published primarily for the information and guidance of ordnance maintenance personnel.
6. Scope.—This manual supplements the Technical Manuals which are prepared for the using arm. It contains general descriptive matter and detailed instructions for the maintenance and repair of the instrument by ordnance personnel. Figures which accompany the text show the placement and method of fastening of each of the component parts of the instrument.
c. References.—The appendix lists all Standard Nomenclature Lists and other publications pertaining to this instrument.
2. Description.—a. General.—(1) The depression position finder Ml is an instrument used for measuring from heights above sea level, between limits of 14 to 1,395 feet and 2,850 to 4,100 feet, the true horizontal range of an object on the surface of the sea and also the azimuth of the object from the azimuth reference line.
(2) The instrument consists essentially of a telescope, mount, and pedestal. The mount carries the telescope and contains mechanisms for directing it. The mount is accurately leveled on the pedestal by means of four leveling screws. When the telescope is directed on the water line of a target the depression angle is measured mechanically, and the corresponding horizontal range, corrected for curvature of the earth and normal atmospheric refraction, is read directly on a range scale graduated in yards. Internal correction adjustments compensate for tidal variations, abnormal atmospheric refraction, and
416753°—41----1
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ORDNANCE DEPARTMENT
for heights of instrument other than those for which the range scale is calibrated. Azimuths are read directly from an azimuth scale and mircrometer.
(3) The depression position finder Ml is the latest development in vertical base instruments. It supersedes the following:
Finder, depression position, Lewis, type A.
Finder, depression position, M1907.
Finder, depression position, Swasey, type A.
Finder, depression position, Swasey, type All.
(4) Instruments are built in several classes and designated numerically as listed below to cover the varying needs of the service. The depression mechanism components and range scale supplied determine the class of the instrument.
Height of emplacement
Class above sea level (feet) Range ’ (yards)
1 74 to 135 1,500 to 20, 000
2 100 to 182 2, 000 to 24,000
3 150 to 272 2,-500 to 30, 000
4 260 to 475 2, 500 to 38, 000
5 350 to 650 2, 500 to 45,000
6 450 to 810 6, 000 to 50, 000
7 575 to 1,045 5, 000 to 55,O0O
*8 750 to 1,395 3, 000 to 60,000
9 750 to 1,375 5, 000 to 60,000
10 625 to 1,160 2, 500 to 45,000
12 2, 250 to 4,100 10, 000 to 80,000
♦Not to be used over 54,000 yards at heights below 1,000 feet and 56,000 yards at heights above 1,000 feet.
b. Telescope Ml.— (1) The telescope Ml is shown in figures 1 to 5.
(2) The telescope may be set for magnification of from 10 to 30 power. It has the following optical characteristics:
Magnification_____________________10 X 30 X
Field of view_____________________6°9' 2°3'
Diameter of exit pupil____________0.3 inch 0.1 inch
Effective focal length of ob- 15.746 inches 15.746 inches jective.
Effective focal length of eye- 0.802 inch 0.802 inch piece.
Apparent field of view____________61°30' 61°30'
(3) The optical system includes an objective (A35630), reticle assembly (A38003), collective lens (A38000), two erectors (A35644),
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DEPRESSION POSITION FINDER Ml
a blue and amber ray filter assembly (B16298), and an eyepiece assembly (C44090). The image produced is erect,
(4) The magnification may be changed by rotating the focusing collar (B16306, fig. 3). Graduations on the focusing collar indicate the magnification for which the telescope is set. As the total rotation of the collar is approximately one and one quarter revolutions, the graduations are engraved in part on the rearward rim of the collar and completed on the forward rim.
(5) The eyepiece assembly (C44090, fig. 3) can be focused by rotation in the eyepiece adapter (B16303). A diopter scale (A35677) graduated from +5 to —5 diopters enables the observer who knows the correction for his eye to quickly focus the eyepiece. The zero graduation is the setting for a normal eye.
(6) A ray filter assembly (B16298, figs, 5 and 1) containing an amber filter (A35663) and a blue filter (A35662) is contained within the eyepiece adapter (B16303). The levers which operate these filters are shown in the end view of figure 2. The long lever marked “A” controls the amber filter; the short lever marked “B” controls the blue filter.
(7) The reticle assembly (A38003) consists of a reticle frame (A38001) carrying a horizontal and a vertical cross wire. The cross wires intersect in the center of the field of view, and the point of intersection marks the optical axis of the telescope. For night illumination, a 3-candlepower, 6-8-volt, miniature electric lamp with G-6 bulb and double contact base is provided.
(8) A leather objective cap (B16853) is provided to protect the forward end of the telescope. This cap is attached by a strap riveted to the sunshade (B129035) which extends beyond the objective.
(9) The telescope is positioned in the mount by two telescope trunnions (A36122, fig. 6) and an accurately machined bar (B16304, fig. 5) on the under side of the body tube (C44091). The optical axis of the telescope is parallel to the lower surface of the bar.
(10) The mask (B16305, figs. 2 and 3) enables the observer to relax the eye that is not focused on the telescope, thereby minimizing the strain on the focused eye.
(11) The counterweight assembly (B129215, fig. 5) is adjustable to provide for proper balance of the telescope.
c. Mount.—(1) The mount for depression position finder Ml is shown in figure 1 and figures 6 to 12.
(2) The mount is attached to the pedestal by the leveling plate support (D9808, sec. R-R, fig. 12) and the leveling plate (D9807) which is bolted to this support. A socket within the leveling plate
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ORDNANCE DEPARTMENT
contains a ball (A36045) about which the instrument centers for leveling. Four leveling screws (A36047) carry the weight of the instrument when leveled. The leveling screws thread into the lower portion of the body (D9806) and bear on the leveling plate through leveling screw shoes. One of these shoes (A36121) is formed with a lug which fits into a recess in the leveling plate and thereby prevents rotation of the body with respect to the leveling plate. For orienting purposes, the mounting bolt holes for the leveling plate are slotted and a projecting lug is provided, permitting movement of the leveling plate when actuated by the two hexagon head orienting bolts (A39510, fig. 1).
(3) The table (D9810, fig. 7) incloses the azimuth worm gear and other working parts of the instrument and contains the azimuth worm (B16421) which meshes with the worm gear and transmits motion in azimuth to the table. The table revolves on ball bearings about the vertical body spindle (B16422).
(4) The azimuth worm (fig. 11) is provided with a ball and socket mounting (sec. D-D) at one end and a compression spring (A7093) and plunger (A36104) at the other end to eliminate backlash. A throwout cam (A36102) operated by a lever (A36103) disengages the worm and permits rapid traversing of the instrument when required. Rotation of the azimuth worm handwheel, with the worm in mesh, causes rotation of the table about the azimuth worm gear. The coarse readings (1.0°) are viewed on the azimuth scale (C44133) through window (A36089). Fine reading (0.01°) are observed on the azimuth micrometer (A36056).
(5) Two level assemblies (C44202) are mounted on the table (D9810, figs. 6 and 12).
(6) The depression mechanism is operated by the drive shaft handwheel (B16426) and is adjusted for height of the instrument above sea level. It depresses the telescope and actuates the range scale and pointer.
(a) The drive shaft handwheel, through a system of gearing (fig. 9), drives the tangent screws at the front and rear of the tangent screw rail (C44132, fig. 7) thus raising or lowering the rail to which is fastened the height scale.
(5) The compensating screw nut (C44130, figs. 10 and 1) which slides along the rail and functions as the index on the height scale, carries the fulcrum pin (A36075) which supports and adjusts the telescope body tube bar (B16304) and the telescope. The adjusting screw (A36067) operated by the knob (A36066) provides a fine adjustment. Clamping thumbscrews are provided.
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DEPRESSION POSITION FINDER Ml
() Direct the telescope in azimuth on a datum point of known range near the maximum working range of the instrument and rotate the drive shaft handwheel until the range of the datum point is indicated by the pointer on the range scale. If the horizontal cross line in the telescope does not coincide with the water line of the datum point, unclamp the thumbscrew on the compensating screw and revolve the compensating screw, causing the raising or lowering of the fulcrum pin, until coincidence is obtained. The thumbscrew should then be tightened. This operation is termed “initial setting.”
(»-sp-* JT
PIN_____•' --1---"
BFDX,BP FR.A.64
END VIEW WITH MASK REMOVED
Figure 2.—Telescope Ml—assembled views.
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DEPRESSION POSITION FINDER Ml
ADAPTER,ERECTOR CELL_ BAND _ SCREW.FLAT HEAD
A35643 W5679 BCLX4DD CELL ERECTOR ahadtpd
TUBE,REENFORCE_ SCREW.FILLISTER HEAD COLLAR,FOCUSING -A38032 -
C44455 BCGX3CQ BI63O6 --- BI29077 cFParator
TUBE,CAM_ SPRING,EXTENSION —SCREWHEADLESS.FLAT MASK --;—A3567I
C44087 A38033 PIN..064 X 5/32- BCUXIBB f BI63O5
TUBE,ERECTOR CELL TUBE,BODY RING CAM TUBE RING,RETAINING < SCREW,ROUND HEAD -60A^’0IOPTER
BI29O78 C4409I A35654 “I A35645 ' BC0X4EF A35677
_________ > RIVET, BUTTON HEAD C . . I i I ■_------> > r^XS/IG A35678
18 ' ' 'XtGX"~~A| r?'. ‘ . XTj-'V 1 \XXS7 xx ywl _____SCREW,HEADLESS,FLAT
• • T‘“ wWw “““
\ || / \ Tn W r /X z3\Ct CELL,EYELENS
\ g k k--------- - - \ / * k / V\ A35675
i - LTT7 z I J J r 'llW
I I g I ” I ' > J L-EYELENS,SECOND
Y X Ah 1 X MM A5“”
ZPa'T^AL X —ss™
■■ ' / - / -'/ / / —I - ■, Yl fry/l /uF? / < 4 *" XX TK____SCREW,FLAT HEAD
________nn-^l -,00 \ rR ffwci _______ r~^\ ।yX T7?z / ' 7 ////, - / - yy / 5 __shield,eye
/.aNxN-.'S VkU I. \ . \ <1. , y /xx ;AA/Z X 6 «8oo4
pA'Xiy ;5S lASAXXXXZSj W =—T&/ - - >
) ____ M/;Ar^""TT • ‘ '■ '• 1 -v z j \ XLILI? _____SCREW.FLAThead
\___________________________________ y >1 BCLX3CB
) SCREW, FLAT HEAD 7 TA __EYELENS,FIRST
/ BCLX4DD A35672
/ _ADAPTER,ERECTOR CELL DETENT LENS,FIELD
/ - ~ ...... A35648 A357I6 A3567O
SHOE frfctor SHOE ADAPTER,EYEPIECE_ ___CELL,EYEPIECE
A35647J A35644^- A35649 616303 A35676
SCREW,FLAT HEAD SCREW,HEADLESS.FLAT -----^SCREW FILLISTER HEAD SCREW FILLISTER HEAD_|
BCLX3CC ~ BCUXICE -------- A35651 BCGX4DF
SHOE ____ SHOE __________________ C^^5^------------------------------
A35646 A3565O U44090
PIN, RIVETED_
064X1/4 SECTION A-A
FTgurb 3.—Telescope Ml—sectioned view.
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_CELL, OBJECTIVE OBJECTIVE RING .RETAINING CELL RETICLE ASSEMBLY A37329 A35630 A3733O BI6940
r-^N,^^ETA'NING C9YER-. ADAPTER,OBJECTIVE ____RING, RETAINING PIN
A37332 A35682n A37328 A35638 BFDXIBC
SCREW,HEADLESS .FLAT __CELL,LENS
। . s I . t-. BCUXIBB BI6939 __BAND
I b<‘\A \.'f, F '/I T ZT __DIAPHRAGM LENS , COLLECTIVE, *35680
—----4',' ’0.I1 :• \ A35637 A38000
'I ' l«M ' “XZv ~1 WIRE. CROSS
h h
--------------------- ---------------------------—£_^J. I----------------------- )--, ___________I
------'z' ’■? BCLX4DD BCLX3CC ----- /
“4vf----TXT- SECTION D-D SECTION C-C
k\ X Zv7 ------- ------------- [RETICLE, ASSEMBLY SCREW, HEADLESS, FLAT
SCREW, HEADLESS.CONE FTJ \Pv4XX/ A38003 BCLX4DD
BCUX2CE X/fX/ LfRAME, RETICLE _SCREW, HEADLESS, FLAT
RING, ECCENTRIC_ A3800I BCUXICE
A3733I L_CLIP,CROSS WIRE
TUBE , OBJECTIVE_[.-HOUSING , OBJECTIVE . ASSEMBLY A38OO2 FR.A.66
C44092 C44348 ___SCREW, FILLISTER HEAD, SPECIAL
A337I5
SECTION E-E SECTION B-B
Figure 4.—Telescope Ml—sectioned views.
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___CAP, OBJECTIVE,ASSEMBLY COUNTERBALANCE, ASSEMBLY -SCREW, FLAT HEAD
816853 r~244481 BCLX4DD
,__PIECE,ENO COUNTERWEIGHT rr44nai°DY TAxrrir --
A37334 r-BI29036 P=44091 A356I6 BRACKETLAMP
-----ATSR4?T,LAMP FILTER, BLUE
PIECE.RIM SUNSHADE ----//' A35642 A35662 -
Ck37335 [8129035 / / /TTSsA_LAMP, ELECTRIC
' ftA A35I89 SH
_____ __!SOCKET,ASSEMBLY A35663AMBER- -
X/Xy/x/xX7////! II I [IT ■ X A X V V V V V x V-VVVV < I jk a 34886 . BI6298
_i I VVU X/XXXX>X- PIN, ,064X^ HOLDER, FILTER [1
\W *i5“5 —ft—
L_. \ X\A54ee5 uasCfei
\y< \ X\\X ' PIN.TAPER | A\'A'
\X\ BFCXIB
ij SCREW, ROUND HEAD_K H [ X7 _SCREW,ROUND HEAD 1 FVFR '
BC0X3DF JS\ BC0X4CF ^35666-
BAR----=T '-X__LEVER
SECTION G~G \ A35667
. ?ECT|0N THRU rAY FILTERS
BC"' 'I ................... [\y\i nut. HEXAGON
• T- j. < X/y X/V x X X TTT rX?j \ A35566B
bracket r. xXXXXXxXXXXx \iN 7t9?^^?=pSj\ I
A3820I-r1 X XXXX'XXXXXxZ I \ SCREW. FILLISTER HEAD
rx |xs S BCGX4FE
wExBxxxM ()i( 1
XX/\XxX?yXX>X>O\ ”[1------------1-- FR'A 67
PIN, TAPER ’ ) \ BCAXICA
BFDX5Q X X
/ ___________\-----------BRACKET
Z. \ 044131
/o w--------OJ o\
SCREW, ROUND HEAD_/___________\
8C0X3EG V \\\ \
/ X \I1 ____\______LEVEL, ASSEMBLY
/ ---L tN ___ r \ C44202
/ IT J \
________z O g
PLATE. NAME______> g Z" « X Hi
A36I23 _ " S \\ / I 3 \
T:ii W
SCREW. ROUND HEAD__° 3 Z 7 /
BCOX3ED t tZZ^LEJ Z X /
\ /X A ____I S STaM;---------------7----MAGNIFIER , ASSEMBLY
\o ZAr-S-H w vx\M 0/ 056654
SCREW, HEADLESS. FLAT_\_ / / L I “ \\\ /
BCUXIFE \ / / £ VWCTNA /_______SOCKET. ASSEMBLY
\ / / ~ K (*Aa\\^=X ------BI29047
cup.on_________\____ / / Jl “ v
CLFX2B V I / / /7 XV\ \ ___SCREW, ROUND HEAD
_ \ ' / // “ P 1 \\\ \ \\\z7 BCOX3EG
ZX XZX / ® ~ VX
\ ( I I __x.XZy
\\__~ -----X I ZSXz J~\
PIN straight------\ \ ”1E H /fT^SI—' I
rtxZk I M®_/1L*=l—x /
16 16 I l = \ /
SCREW, HEADLESS, FLAT__/ ,
\ — '( '' I' 'A-S~' CLFX2B
\ < — jn • ------------fr a54-
-------Xj_____1 X ________________PINION_____________ J
BI64I7 ------
LPIN.TAPFR SPINDLE I BEARING,BALL RnnY rnvPB
I09(N04/0)X7/B BIG422 -1 UA379I6 B°8V ----- [.BOLT.HEX.HEAD
SCREW,ROUND HEAD_ GASKET__ BACXIAA
BCNX2CE A36I34
SECTION A-A
Figure 7.—Mount for depression position finder Ml—sectioned view.
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ORDNANCE DEPARTAIENT
qy ,M,h^- —___ °^e
»«' >X\ \ !- -AN\
Z^JjZVX ^\AwSx.
z/Tz^Xz^1"^ 'X X. ^sX/*‘^^^Sb\
AzAx>z \X vXX
////X / \\\ ^X°X\N\
///G 7 \X n VnX
//// / \\yN __________\. -AW________SCREW. ROUND HEAP
//// O 7 X W--------------------------\ VNW I BCOXJEG
POJ.NTER---//// °y---------------------vK \ X \X\ LUSHER,LOCK
S //// d?\/ AX \ V'4 \\V\ BEAXIF
Lj // :/ g /^|>> 1 l\\ v ° \\W
lII o Ar '\\\ \\\\
rill \\\__________________________Y °* \W\ POINTER
1 7 W\--------------------------V o'Wn BIS424
rl \\\ V-% \\U
w//°7 । v\ v^Ww
fei \X^ss::s=SEiOT^ p\n\
° z^WvaV I
—'“" rJS' 'V^\V\\ ~~~
0 vN^ cZ\. / Ta. fr *59
0 ( X /T//
I JS-
Figure 8.—Mount for depression position finder Ml—sectioned view.
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9-1695
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DEPRESSION POSITION FINDER Ml
TM
nr? HEAD---- ?eN;TA?E-- ----NUT.STOP SCREW, ROUND HEAD _RING, RETAINING
BCLX3DG BFCXIBD A36II3 [“BCNX2CE A35I47
___£A8° BLOCK SWITCH SOCKET___ PIN, TAPER BRACKET 09809 A3609S A3479IBFCXIBD BI6427
P-A36U9 SaAW?TER HEAD---- Axlg™ ^AR,^VEL <________5*'TCH ____BEARING.BALL
A36119 BCCXIAA A355648 BI66I9 F A35567 &379I7
WASHER, LOCK_____ Tj ST0P sp
B5282A----------- . | A /-136il5 HsGHT
~ I '[ _ J ~ J -----------------------V----------------------------------1-----• ^xK/&I6426
g ewfawr e \ .............’%J:“ -p W<< «_® Mfl S«P L_£ollar.....'-=■ — = -a- - - \VzxAY \ Lkey \\\^-^ ' W\'\ H
*35082 AW\\>K \ A38"2
--PIN,TAPER L_PIN,TAPER / X \ STOP __SCREW, FLAT HEAD SPACER fl \. Z/ STUD BFCXIBC BFCXIBC / A36II4 BCLX3FF A36II7 a A36062
---BEARING.BALL POLL AR / V\ PIN. TAPER _ ' A37917 A35082 / .156 N0.0.xI X~SECTION H-H
PIN,TAPER___ __________BEARING.BALL | _STRIP _____ r~----
BFCXIBD A379I5 f?"-. , /lL± a36052 FR. A. 60
GEAR, SPIRAL__ ________SPACER __RING, RETAINING / /, / Xv / 7 7 / / 71
A36IU A36II8 A35I47 / 7 / , z .)IZ/ / // / \
-----^CSeE40LESSA#T ^hT4 SVEL r / ■-( SUPPORT. POINTER BCUXIFE C44I34 BI64IG 7 / / / y — T -- A36084
/ / ( / K '____________SCREW, FLAT HEAD
SECTION G-G __7 /]/ \ | BCLX3BA
7 _______/T| ' y 11 ___SCALE,RANGE
■ in i, ■, ■■ i, i, i . I ZZjffiTyty, p v ■ _C ear
' -SF] Tgj ■ t l .......! BI6423
pin . .. I M ,| '_________________hub
.0907X1 [.11 g A36083
A36&85---SECTW J-J
Figure 9.—Mount for depression position finder Ml—sectioned views.
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»
ncnox'----1 PA'A'/Pk COVER PLUG ________ PIN, TAPER f fbi x
o36093 VAA&A , P36130 A3e094 IO9(Na4/ObP-£ I 4 -----------------------CAM
bushing r/zflHzZl I 8 U ' A cup.oil
A36092 1 *—f—d—IL. J Zrl t 1 \ x v >. ■ vt—-—’—”—>—r—\ \ \\ PIN. CAM \ i / ' CLFX2R
PLUG ___, I— J A5608B '---M PIN TAPER
A36i3i I____vy PAk■' gib plunger . Lr— ------------ , , ।
RACK I ajgogs-t asbobs—I fifth_________ ,io9(no 4/o)x>g
Bl64'9 - .^1 1(1^1 1 I -jilGAZO
A37650 i sT3u6g87 ™ .---------:; • / Uro -----“iEXTENSI0N
SCREW, FILLISTER HEAD I ! W ^1 P V™ _ A3807I
BCGX3CC I I EST TTTTTTII I ' \ ' •- \7. SHAFT, CAM
i ---- THUMBSCREW JffllUlLffl STUD ____I r X/T '*■---------------------A36097
RING. RETAINING________A3607I ' A3807<5--- \ 3bUM
St , fc'Bl-----------------------------------SKT'°"L-L
CLFX2B ----A36082 GIB, COMPENSATING SCREW NUT IJJ A —
// \ I/i • I' I A36068 \ \
yA ----CLFX2A I I . II. ,Njr-----?■-----«Io53WORM
.Jh ^IT
\,ZZ< A i 'VC'/ \ //Z//7X ' mi'nn niun thumbscrew
A. j ’ x/Zp PIN ________________ IlllllLli™------A3607I P\________„ ______j L\
X-H r\i kA > BFDXIAG _________________SCREW, HEADLESS, CONE POINT ' |~~ ' I
X. /I LA • BCUX2EG * ’ ‘ ’ " **"
C / < SECTION M-M
[tZ1| / (—1-3--r~l L f A.".‘ '■■4—t SCREW, HEADLESS. FLAT
LLL—Sx?Tn PIN, FULCRUM____1 11 LrJ qr~tl ’ ,c«,.iriCw3
SECTION K K-K A36075 ----------L I “ .'64 (N0.8I X
btGIION K K K K SCREW, HEADLESS.FLAT /T\ CLIP. SAFETY I _______________ , , GEAR. SPUR
BAR.COMPENSATING_ BCUXICC I ------- - ecrT.ftM k. m A36098
C44I29 ' Ff Ul-I SECTION N-N
KNOB __________________ THUMBSCREW --------------NUT, ROUND---------------------
SCR€W, FILLISTER HEAD A36O66 A36072 pLCr A36076
BCGX3FE-| SCREW ADJUSTING PIN, TAPER ~ ----SCREW, COMPENSATING FR.A.6I
A36067 pbFCXIB ------A36074
I r^r>—1-7. NUT. ADJUSTING SCREW IJl / . ■ ' Z_____ P'N
•--< X A36050 ”1 A f-.7 / T n-n / ' : ' ' I BFDXIAG
\_J'L_J ___=< 'I 11 I ~l - X , - |______NUT, COMPENSATING SCREW
A I / 7| , , TH / x p- Z----------------j C44I30
BRACKET_ I „ A '// 'ifALx s A 'mZM I________________________PINION
A36O49 X UT 2k j/ /'/ /, Mp" A36077
BRACKET___ s , P'N 3 ,------=^= 1 SCREW,HEADLESS.CONE PT
BI64I8 L_J I I' 20X » ) r--^ __________________BCUX2EG
PIN. TAPER__, tH-H SCREW. FILLISTER HEAD / ’ ' Dll'__________________ 11 ______I INDEX
.109 (N0.4/0) X^ Cl I Ti l_F/f-..pBCGXSFG / L LfL ________m 1 A36I35
1___________rAZ ’ I _______J GIB. RACK
|____PIVOT, COMPENSATING BAR A36070
A36078 I___________J SECTION Q-Q
SECTION P-P
Figube 10.—Mount for depression position finder Ml—sectioned views.
26
DEPRESSION POSITION
FINDER Ml
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FRAME,WINDOW_ _________SCALE, AZIMUTH SUPPORT, WORM BEARING ---PIN,.I2O«J
A3605I C44I33 A36060 ---- 8
WINDOW----- -----------------INDEX KEY,WOODRUFF__ MICROMETER
A36I24 A3609I BI2327C A36064 -----A36O56
\ r-l£,R^A^LAT HEA0 SOCKET, BALL_ AS /r?'. rf—j PLATE. CLAMPING
A34885BCLX3DG A36O59 Sf' / ■ T x A36O54
A________ I .s'^/ / '[ IT | I N____________SCREW,ROUND HEAD
TfflVI WHI >l‘ = -f-yfcl X / // ' f 7 BTINX2CE
'vZ-LZz ‘ tdl IkZTl 'ZnlVVxin^^ // '///, V ADAPTER.MICROMETER
bracket, lamp sT//' 5-ZT7z/>Z r~nr / ~1'n A36O55
Bl6425 NX '///[ V/aXs/s////////?\ n 1 --_ SCREW.FILLISTER HEAD
CUP.OIL___ NN ZZ/___WINDOW fgZlZZ//////S//'AA o DOX']' BCGX3FE
CLFX2^ T— // A36089 ............ PIN,TAPER
fZll' Tl V-^ '// ) '^1--------------1 -II BFCXIBC
Jn T /S//\ 'TA i - - - - NUT,ROUND
xAj=aX/////X. j ^^~A3soei
\X—X^n/Zknu: XZ>
J KZZ/X \Z Z I,' j \ u / I—I' ■ ‘ -f (, H If .T I Z«zl CZySr- PIN /zv\
V/7U7V77 ---SCREW, ROUND HEAD fyfy///AA777//;///A CB| ZZ / T/a3506i f7 xX
' ]— I
A379I7 [CAP,BALL ’
SECTI0N C-C SCREW,HEADLESS___ A36°5® Q -----H
LEVER A34660 a“9,7 ' —J \\ T
A36I03 /—y SCREW,HEADLESS,FLAT___ I WASHER,SPRING \\ /7
PIN,TAPER_____________ fX 8CUXIFF SECT10N D.D 436065 /
■109 x-g- I /x xzyyc---"5_ stunoN_u_u_ GR|p____
RING,RETAINING \ / \ 'n>^. A36I20
A38.0I ----------- XXX
K-------------1 13W-/J
SCREW, HEADLESS,FLAT T- ~L / // 35 AC)
BCUX,FF J ^^^======~ !
KImI/Z/Z/'Z i * Z /_.CAM .THROW OUT PLUG__1
m" ILZZZZZ/ L- , JZ Z A36IO2 A36I00 '
--------------H—
i//i/y/y/y/iiiii/w n- i ;
JI 1 (Z gg ZZ/ZZ///zZ7//777 777
ZXzZ<^^^/£/z^ bW°6R^~
SPRING,COMPRESSION VTTT7I. J
A7093 ------ CFCTIHN c c l-X^JR LPIN , SECTION F-F FR. A 62
SECTION E-E A36I04 A3506I ----------
Figure 11.—Mount for depression position finder Ml—sectioned views.
TM 9-1695
7
ORDNANCE DEPARTMENT
BOLT, HEXAGON HEAD___________________ kxT ____RING, RETAINING ----■---
BCAXIEA --- ~T r>C\ ||\X A36046
SHOE______________I-, ' s'
A36096 <. PIN .TAPER I L ~ ""ji ~ T\
BFCXIHL I-T \\J_______l\^ I Is''
A36°47 (fl-/, JX hl
SHOE, LEVELING SCREW AZA (-A——i V X X. A— - --------SHOE .LEVELING SCREW
A38250 7T*\-i \. / / PIT
A36107 bi" ir I—r -I. ■ v"~~t । 1 l..,xL"■‘■.■‘■■4, i, i i, 4.1 11 LnJrrJ
TUBE, LEVEL VIAL_____| | | ^1* I 1 ■ ■ ■ • ■ — ■ . , / ' / j\Xl r“-
A36IO6 .--‘■■A.-1——:-------------------------------------------1 -di J—• -]
1—n------------------------------------------------------o—1
SECTION S-S
Figure 12.—Mount for depression position finder Ml—sectioned views.
28
TM 9-1695
7
DEPRESSION POSITION FINDER Ml
LAMP, ELECTRIC A35I89 (6-8 VOLT)
PORTABLE LAMP.
,RHEOSTAT AND FUSE BLOCK NOT FURNISHED WHEN CURRENT IS SUPPLIED FROM BATTERY.
SOCKET,ASSEMBLY BI6I39
AZIMUTH LAMP
SCALE LAMP
SOCKET.ASSEMBLY BI29047
SOCKET ASSEMBLY BI6I39
FUSE,CARTRIDGE, ENCLOSED —
A37I60 (250 V. 3. AMP.)
EXTRA FUSE
PLUG A35I86
SOCKET, ASSEMBLY BI6I39
TOMAINS
XTRA FUSE
BLOCK, FUSE RESISTOR UNITVISA ORVI6B
THESE LEADS TO BATTERY,WHEN CURRENT IS SUPPLIED FROM BATTERY.
Bl 29062 RETICLE LAMP.
Figure 13.—Depression position finder Ml wiring system.
WIRE.LEAD ASSEMBLY BI29b63 /
RHEOSTAT BI6986D
FR A. 78
29
TM 9-1695
Appendix
LIST OF REFERENCES
1. Standard Nomenclature Lists.
Optical repair kit for harbor defense________SNL F-93
Finder, depression position, Ml______________SNL F-lll
An up-to-date list of SNL’s is maintained as the “Ordnance Publication for Supply Index”________ (OPSI)
2. Technical Manuals.
Cleaning and preserving materials_____________TM 9-850
Materiel inspection and repair________________TM 9-1100
3. Field Manuals.
Gunnery, seacoast artillery____________________FM 4-10
Fire control and position finding, seacoast artillery. _ FM 4-15 [A. G. 062.11 (8-7-41).]
By order of the Secretary of War :
G. C. MARSHALL,
Chief of Stajf. Official :
E. S. ADAMS,
Major General, The Adjutant General.
Distribution :
IR and H 4 (3) ; IBn 9 (2) ; IC 9 (4).
(For explanation of symbols see FM 21-6.)
30
U. S. GOVERNMENT PRINTING OFFICE: 194!
For sale by the Superintendent of Documents, Washington, D. C.
NTSU LIBRA
1001895659