HANDBOOK OPERATION AND SERVICE INSTRUCTIONS GUN CAMERA TYPE N-9

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP70B00198R000700010007-2
• Release Decision: RIFPUB
• Original Classification: K
• Document Page Count: 16
• Document Creation Date: December 23, 2016
• Document Release Date: January 6, 2014
• Sequence Number: 7
• Publication Date: February 1, 1954
• Content Type: MISC

' Declassified and Approved For Release 2014/01/06 : CIA-RDP70600198R000700010007-2
HANDBOOK
-OPERATION AND SERVICE INSTRUCTIONS
TYPE N-2
( BELL & HOWELL)
PUBUSHED UNDER AUTHORITY OF THE SECRETARY OF THE AIR FORCE
AND THE CHIEF OPl'HE BUREAU OF AERONAUTICS
R FORCE?OC?0700.10.7.54
A?.
I Declassified and Approved For Release 2014/01/06 : CIA-RDP70600198R000700010007-2
Declassified and Approved For Release 2014/01/06 : CIA-RDP70600198R000700010007-2
AN 10-10CB-25
Reproduction for non-military use of the information or illustrations contained in this publi;
cation is not permitted without specific approval of the issuing service (BuAer or USAF).'
The policy for use of Classified Publications is established for the Air Force in AFR 205-1
and for the Navy in Navy Regulations, Article 1509.
LIST OF REVISED PAGES ISSUED
INSERT LATEST REVISED PAGES. DESTROY SUPERSEDED PAGES.
NOTE The portion of the text affected by the current revision Is indicated by a vertical line in the outer margins of the page.
* The asterisk indicates page, revised, added or deleted by the current revision.
ADDITIONAL COPIES OF THIS PUBLICATION MAY BE OBTAINED AS FOLLOWS:
USAF ACTIVITIES.?In' accordance with Technical Order No. 00-5-2.
NAVAL ACTIVITIES.?Use Publications and Forms Order Blank (NavAer 2126) and submit to the nearest publica-
tions supply point listed below: NAS, Alameda, Calif.; NAS, Jacksonville, Fla.: /4M. Norfolk, Va.; NAS, San Diego,
Calif; NAS, Seattle. Wash.; NASD, ASO, Guam; NASD, Philadelphia, Pa.
For listing of available publications see Naval Aeronautic Publications Index (NavAer 00-500).
DeClassified and Approved For Release 2014/01/06 : CIA-RDP70600198R000700010007-2
USAF
Declassified and Approved For Release 2014/01/06 : CIA-RDP70600198R000700010007-2
AN 1U-1Ucti-L1
TABLE OF CONTENTS ?
Table of Contents
Section
INTRODUCTION
I. OPERATION
1-1. Description
1-8. Technical Data
1-9. Principles of Operation
1-29. Boresighting the Camera
1-32. Loading and Installing the Magazine
1-33. Simplified Operating Procedure
II. SPECIAL SERVICE TOOLS
Ul. PERIODIC INSPECTION AND LUBRICATION
W. MAINTENANCE
4-1., Trouble Shooting . ? ..... ......
4-3. Lens Maintenance
4-6. Shuttle Maintenance
4-10. Camera Body Maintenance
4-14. Over-run Indicator Lever Adjustment
4-15. Film Magazine Maintenance
Declassified and Approved For Release 2014/01/06 : CIA-RDP761300198R000700010007-2
Page
1
1
1
2
2
5
5
7
7
7
8
9
9
10
11
11
Declassified and Approved For Release 2014/01/06 : CIA-RDP70600198R000700010007-2
Section I AN 10-10CB-25
'CAMERA BODY I
!RADIO NOISE
? 4. 4, FILTER .., 4,11
it
SIREN:0TE SHUTTER" f
',CONTROL SWITCH ,
Figure 1-1. Components of Type N-9 Gun Camera
SHUTTER 'APERTURE
OVE*RUN .
CONTROL KNOB
CONTROL kNOB..
Figure 1-2, Type N-9 16-mm Motion-Picture Camera
Declassified and Approved For Release 2014/01/06 : CIA-RDP70600198R000700010007-2
$7.f7,flYW.'
Declassified and Approved For Release 2014/01/06 : CIA-RDP70600198R000700010007-2
AN 10-10CB-25
4
I ?
I
?
INTRODUCTION
This handbook provides operating and service in-
structions for the Type N-9 16-mm Gun Day Camera.
The instructions cover operation, inspection, lubri-
cation and maintenance which can be performed by .
personnel of operating units.
1-1. DESCRIPTION.
Section I
Paragraphs 1-1 to 1-6
The Type N-9 16-mm motion-picture camera (figures
1-1 and ,172)' operates on 24 to 29 Volts dc and is
designed ;for producing visible recards of aerial
combat or. for recording results obtained in aerial
gunnery training., . ?? ' ? .":?.
SECTION I 1.
? It
OPERATION
1-2. The Type N-9 motion picture camera is de-
signed for use with standard 16-mm black and white
or color film. The magazine will accomodate a film
cartridge of 50-foot capacity. The magazine can be
quickly removed from the camera for ease in loading.
1-3. The camera is calibrated to operate at speeds
of 16, 32 and 64 frames (or pictures) per second.
The selection of proper camera speed is made
manually before take-off by means of a speed
control knob (figure 1-2). This knob controls the
gear train which, through a coupling with the magazine
assembly, drives the film through the camera at
the selected speed. Milled flats on the speed changer
index shaft positively locate the knob at each speed
setting, and prevent the speed from changing ac-
cidentally during operation of the camera.
CAUTION
The speed setting must not be changed while
the camera is in operation.
e
knob gear from the remote control pinion; then
rotated to the desired setting and released. A shut-
ter aperture nameplate on the side of the camera
body indicates the proper shutter aperture settings
for various combinations of camera speed and ex-
posure time per second. The following exposure
guide chart indicates the proper lens diaphragm
settings for various light conditions and? speed and
aperture opening combinations. The settings are
based on the use of Class A film and yellow filter,
and the shutter openings are indicated by letters
corresponding to those around the control knob.
EXPOSURE GUIDE CHART (MANUAL)
Shutter Aperture SettingS'
and Frame Speeda
Lens Diaphragm Settings
for Light Conditions
1-4. The camera is equipped with an over-run
control, the primary purpose of which is to con-
tinue the operation of the camera for a period of
up to three seconds after the gun has ceased to "
fire. To make the over-run adjustment, the over-
run control knob (figure 1-2) must be depressed
and rotated to the desired setting of 0, 1, 2 or 3
seconds of over-run time. The knob must be prop-
erly seated after the adjustment is made.
1-5. The shutter aperture control knob (figure 1-2)
permits manual adjustment of the shutter aperture,
or opening, by rotation of a movable shutter blade.
The primary advantage of this adjustment is that
it eliminates the blur or "smear which might
otherwise result from highLspeed photography, while
retaining an effective wide opening for normal pho-
tography and 'poor light conditions. The control
knob must be pressed in to disengage the control
32 ; : 64,
B A
E b ?
Bright Hazy
f/22 f/11
f/16 f/8
f/11 f/5.6
41/8 f/4
05:6 1/2.8
Dull
f/5. 6
f/4
f/2.8
f/2. 8
f/2.8
NOTE
,
The yellow filter 'should be used in extreme
brightness conditions -- over water, snow,
desert band, and so forth. The clear filter
serves to protect the camera lens from
damage when the yellow filter is not beingused.
1-6. When remote shutter control operation of the
camera is desired, the lens diaphragm must be
pre-set as indicated in the following chart. Selec-
tion of the shutter opening then cap be accomplished
electrically by the pilot during flight by rotating
the knob of the remote shutter control switch (figure
1-3) to one of three positions --- DULL, HAZY
or BRIGHT. The proper lens diaphragm opening is
. obtained by rotating the lens diaphragm control
ring (figure 1-2), to the desired f-stop marking
on the lens barrel.
Declassified and Approved For Release 2014/01/06 : CIA-RDP701300198R000700010007-2
Declassified and Approved For Release 2014/01/06 : CIA-RDP70600198R000700010007-2
Section I AN 10-10CB-25
Paragraphs 1-7 to 1-12
"1'
Figure 1-9. Remote Shutter Control Switch Box
EXPOSURE GUIDE CHART (REMOTE)
Frame Speed
16
32
64
Lens Diaphragm
Setting (Day)
Lens Diaphragm
Setting (Night)
1/5.6
1/2.8
f/4
1/2.8
f/2.8
1/2.8
1-7. The camera is equipped with a jack plug con-
nector (figure 1-2) for the connection of an external
lens heating unit to prevent frosting of the glass
surfaces of the lens in extreme cold temperatures.
The camera body also is equipped with heating
elements. For extreme low temperature operation,
these elements must be "on" for a minimum warm-
up period of one-half hour. The camera heaters
are operated by turning the remote shutter control
switch to any one of its three light setting positions.
Figure 1-4, Film Magazine
Separated from Camera Body
1-8. TECHNICAL DATA
Manufacturer Bell & Howell Co.
Manufacturer's design number Des. 917-A
Government model number Type N-9
Film size 16-mm
Film capacity 50 ft
Camera speeds 16, 32 and 64 fps
Standard lens 35-mm, 1/2.8
Shutter opening variable
Voltage requirements 24 to 29 vdc
Approximate weight (camera and magazine) 3.75 lbs
Overall dimensions (camera and magazine):
Height - 3-13/32 in.
Width 2.883 in.
Length (with lens and filter) 8 in.
Approximate current drain (at 28 vdc):
Camera motor 1-1/2 amp
Camera heater 1 amp
Magazine heater 1 amp
Over-run solenoid 1/4 amp
Remote control switch 1/4 amp
1-9. PRINCIPLES OF OPERATION.
1-10. GENERAL.
1-11. The Type N-9 camera consists basically of a
camera body and a film magazine (figure 1-4). The
camera body mechanism provides the driving power
for the film magazine. The process of feeding the
film past the magazine and camera exposure aper-
tures is accomplished by the magazine mechanism
and the film shuttle, or claw.
1-12. Both the camera body and film magazine are
equipped with heater wires sealed against the inner
face of each casting. The current required (24 to
29 vdc) to drive the camera mechanism and energize
the heater wires is brought directly into the camera
body through a short power cable. Mating contacts
In the camera body and magazine provide the con-
nection which supplies the current to the magazine
heating wire. The contacts are so designed that
the magazine can be installed or removed when
electrical power is on without short-circuiting the
: Declassified and Approved For Release 2014/01/06 : CIA-RDP70600198R000700010007-2
ti':)::?2?????iirafri tlfr
) % ? '1"
, Declassified and Approved For Release 2014/91/06 : EIA-RDP79600198R000700010007-2
AN 10-10CB-25 Section I
Paragraphs 142 to 1-21
41)
contacts through the magazine or camera body.
1-13. The film magazine (figure 1-5) contains the
pressure plate, film guide arms and sprockets re-
quired foi? feeding the film past the aperture opening
and for maintaining proper film alinement during
operation. An automatic recycling counter also is
provided to indicate the length of unexposed film
in the magazine. The counter will recycle back to
"50" when the magazine cover release button is
depressed. The film sprockets are driven by a
crown gear (figure 1-4) in the camera body. ?
1-14. SHUTTER OPERATION.
1-15. The camera shutter consists of two shutter
blades, one of which can be rotated independently
of the other to increase or decrease the size of
the shutter opening. The shutter aperture adjust-
ment can be made manually by means of the shutter
aperture control knob, or electrically by means
of the remote shutter control switch. In either
case, the rotation of the rear shutter is accom-
plished by the same mechanical means.
1-16. In manual operation, the shutter control knob
(figure 1-5) is pressed in until its large gear dis-
engages from the remote control pinion of the shutter
control assembly, thus by-passing the control motor
and its gear train. The end of the control knob
shaft is slotted to receive the flatted end of the
shutter control camshaft. Therefore,, rotation of
the knob also will serve to rotate the control cam,
fr the outer contour of which bears against a pivoting
shutter control lever.
1-17. A hex head adjusting screw at the lower
end of the control lever bears against the end
of the shutter displacement ? shaft. As this shaft
Is forced toward the front of the, camera (by the
control lever) or toward the rear of the camera
(by the return spring), the displacement gear causes
the shutter shaft worm gear to turn, thereby rotating
the rear shutter blade. , ? ?
1-18.' In electrical operation, movement of the re-
mote shutter control switch to one of iti'sthree
positions (BRIGHT, HAZY, or DULL) energizes the
shutter control motor through the closed switch
contacts for that particular fr position. Because the
control knob gear (in its released position) is en-
gaged by the remote control pinion, the knob and
cam will be rotated by the motor' through the gear
train.
1-19.' A locating, pin in the shutter control cam
engages a. hole in the underside of the cylindrical
cam switch. Thus, the cam switch actually is ro-
tated by the cam. Three setscrews protrude from
the periphery of the cam switch and are located
to correspond with the contour variations of the
cam. Each of these setscrews lies in the path of
one set of switch contacts. As the cam switch
rotates, the setscrews (one at a time) will separate
the switch contacts. When the energized contacts
are separated, the control motor will stop, halting
the rotation of the rear shutter blade at that point.'
1-20. SPEED CONTROL OPERATION.
1-21. Camera speed is controlled by a speed changer
MOTOR
REMOTE
CONTROL
PINION
MOTOR DRIVE .WORM
CAM SWITCH.
CAM
I
001141 --
000 ?
ton
SHUTTER
CONTROL
LEVER
DISPLACEMENT.
SHAFT
CONTROL
KNOB
LOCATING
PIN
DISPLACEMENT
GEAR
HEX HEAD
ADJ. SCREW
RETURN SPRING
SHUTTER SHAFT
WORM GEAR
Figure 1-5, Diagrammatic View of Shutter Control Operation
Li Declassified and Approved For Release 2014/01/06 : CIA-RDP70600198R000700010007-2
Declassified and Approved For Release 2014/01/06 : CIA-RDP70600198R000700010007-2
Section I
Paragraphs 1-21 to 1-26
mechanism within the camera. Rotation of the speed
control knob manipulates shifting levers which, by
means of changing gear ratios, determine the speed
at which the camera will operate.
AN 10-100B-25
1-22. OVER-RUN CONTROL OPERATION.
1-23. The electrical wiring arrangement for the
camera is such that pressure on the gun trigger
button completes the electrical circuit to the camera,
which then begins to take pictures. Under ordinary
' circumstances, the removal of presSure from the
trigger button would break the electrical circuit
to the camera and halt the picture-taking process.
However, the N-9 camera is equipped with an over-
run control which permits camera operation to
continue for a period of one,- two, or three seconds
after the trigger button has been released.
1-24. The desired amount of over-run time is set
by means of the over-run control knob, figure 1-9.
The outer rim of the control knob has been notched
to match the "0", "1", "2" and "3" second over-
run settings. The knob must be pressed in against
the spring washer before it can be rotated. When
the knob is released at the desired setting, one
of the notches will engage a pin in the camera
body to lock the knob at that position.
1-25. In actuality, the over-run cycle is controlled
by the cam disc of the over-run plunger. The slotted
plunger shaft protrudes down through the solenoid
and engages the inner end of a clock spring. The
tip of the shaft rests on the end of the over-run
lever which,, being under tension of a torsion spring,
tends to force the plunger outward toward the con-
trol knob. While the plunger is in this raised position,
note that the notched end of the over-run indicator
is forced downward by the lever 'pin, thereby pro-
jecting the tip of the ,indicator into the corner of the
aperture opening. Thus, all pictures taken after the
guns have ceased firing will be identified by the
appearance of the indicator tip in the upper right-
hand corner of each frame. ,
1-26. Because the plunger, dock spring has been
assembled so as to unwind ? in a counterclockwise
direction, the cam dog tends to bear against the
control knob stop pin. When the gun trigger button
Is pressed, the electrical circuit is completed to
the over-run solenoid and micro switch. The ener-
gized solenoid immediately pulls the plunger in-
ward, disengaging the ratchet engaging ear from
the ratchet teeth on the underside of the helical
gear. While in this energized position, it will be
noted that the end of the plunger shaft has pivoted
the over-run lever in the opposite direction, thus
PIVOT POINT
APERTURE
I "-?
L.,
LEVER PIN
OVER-RUN
SOLENOID
CAM DOG
RATCHET EN-
GAGING EAR
' HELICAL
GEAR
PLUNGER
SHAFT
SPRING
'WASHER
?
KNOB STOP
PIN
OVER-RUN
LEVER
PLUNGER
CLOCK
SPRING
MICRO
SWITCH
SWITCH
LEVER
MOTOR
COUPLING
CONTROL
KNOB
Figure 1-6. Diagrammatic View of Over-run Control Operation
4
Declassified and Approved For Release 2014/01/06 : CIA-RDP70600198R000700010007-2
Declassified and Approved For Release 2014/01/06 : CIA-RDP70600198R000700010007-2 Section I
Paragraphs 1-26th 1-32
p.
Figure 1-7. Type A-2 Gun Camera Boresight Kit
withdrawing the tip of the indicator from the aper-
ture opening.
1-27. The electrical hook-up of the micro switch
Is such that the switch button, when released, com-
pletes the circuit to the camera motor and the
camera begins to operate. The motor coupling drives
the worm gear which, in turn, drives the helical
gear. When the trigger button is released, the sole-
noid is de-energized and the over-run lever forces
the plunger outward until the ratchet engaging ear
meshes with the ratchet teeth on the underside
of the helical gear. When the control knob is set
at "0" seconds, the cam lobe will immediately
depress the 'micro switch button by means of a
pivoting switch lever, thereby opening the circuit
to the camera motor and stopping the camera.
When the control knob is set for "1", "2" or "3"
seconds over-run, the helical gear will drive the
plunger cam clockwise until the cam lobe depresses
the switch lever.
1-28. Clockwise rotation of the solenoid plunger
winds the clock spring. Each time the trigger but-
ton is pressed, the energized solenoid will pull
the plunger inward, disengaging the ratchet engaging
ear from the helical gear. The unwinding clock
spring causes the cam to spin around in a counter-
clockwise direction until the cam dog strikes the
control knob stop pin, thus preparing the mech-
anism for a repetition of the over-run cycle.
1-29. BORESIGHTING THE CAMERA.
1-30. At the initial installation of the camera and
immediately after boresighting the guns, the optical
axis of the camera must be alined with the gun
or gunsight. Boresighting is accomplished with the
EYEPIECE
CONNECTING
UNION
LOCK
KNOB Coval
PLATE
BORESIGNT
BODY
AUXILIARY
SLEEVE
SPACING EYEPIECE
ELBOW SLEEVE SLEEVE
CONNECTING
UNION
Figure 1-8. Assembling and Mounting the Boresight
use of the Type A-2 Gun Camera Boresight kit
(figure 1-7).
1-31. The boresighting components can be assembled
either for angular viewing or straight-line viewing
as shown in figure 1-8. The procedure for boresighting
is as follows:
a. Clamp boresight to camera body .with lock knob
(figure 1-8) and open lens diaphragm to f/2.8.
b. Swing cover plate away from opening and, while
viewing through boresight eyepiece, rotate manual
drive coupling with a screw driver until shutter
blades no longer cover aperture opening. .
CAUTION
Excessive use of manual drive coupling may
damage over-run unit. Use sparingly.
c. Bring the crossed reticle lines of the bore-
sight into sharp focus by sliding the boresight eye-
piece slowly in or out of the eyepiece sleeve. The
crossed reticle lines indicate the exact optical center
(aiming point) of the camera.
d. If necessary, the camera mount now must be
adjusted until the crossed reticle lines of the camera
boresight are alined with the same target used
for boresighting the guns.
e. After boresighting is accomplished, tighten the
camera mount attaching bolts securely to prevent
the adjustment from shifting and remove the bore-
sighting equipment from the camera.
1-92. LOADING AND INSTALLING THE MAGAZINE.
a. Remove the magazine cover by depressing the
cover release button (figure 1-9) and sliding the
cover from the magazine body.
Declassified and Approved For Release 2014/01/06 : CIA-RDP70600198R000700010007-2
5
Declassified and Approved For Release 2014/01/06 :wCIA-RDP70B00198R000700010007-2
Paragraph 1-32
??
.33.4.44444?3
34
? - ? '
1?1; ?
PRESSUPE PLATE
GUIDE ARM,
FEED-SPROCKET '
I.
CARTRIDGE.ts ? -
"
,
Figure 1-9. Film Magazine with Cover Removed
b. Open the film guide arms by swinging them
away from their respective sprockets.
C. Pull approximately one ,foot of film from the
feed spool of the cartridge. Place the cartridge
diagonally across the magazine as shown in figure
1-10, and insert the film between the pressure plate
and magazine aperture. Film must be alined in
milled slot of magazine and pressure plate must
be down below guide rail at front of magazine.
d. Adjust film loops to sizes indicated by film
path diagram in magazine. Note that lower loop
is the larger of the two and, preferably, should
art-
? 'FILM CARTRIDGE
fEEDSPROCKET.. ,
FEED SPOOL "-
-
6
FILM ' TAKE-UP 1.. TAKE?UP
w LOOP SPROCKET 3 44: SPOOL .
"
Figure 1-10. Threading Film through Magazine
exceed slightly the indicated pattern. Then thread
film over sprockets, making certain that perfora-
tions are properly seated over sprocket teeth. In-
sert film cartridge into magazine (figure 1-11).
e. Close film guide arms securely and check aline-
ment of film by rocking the film gently back and
forth on sprocket teeth:
f. Draw excess film back into film cartridge by
rotating cartridge feed spool counterclockwise and
take-up spool clockwise. Make certain that there is
no excess slack on the take-up spindle.?
g. Make a final check of the film threading; es-
pecially the formation of the film *loops (step d).
Make, certain that fibril is seating properly in film
channel at ' front of magazine, and install cover.
NOTE;
Failure of the cover to close properly in-
dicates that the sprockets have not been
completely seated or that the pressure plate
has been installed upside down. ' '
h. Before installing the magazine to the camera
body carefully remove all dust and film emulsion
deposits from the chromium-plated aperture face
(figure 1-4). Insert the magazine So that its locating
pin enters the mating hole to the right of the camera
aperture and the camera locating pin enters the slot
near the back end of. the magazine. Press the rear
end of the magazine firmly against the camera
body, swing the magazine lock (figure 1-4) into
place, and tighten the knurled lock knob securely.
NOTE
Two shallow indentions have been drilled
into the under surface of the knurled lock
knob: These indentions match two button-
like extrusions on the upper surface of the
magazine lock. When the knob has been turned
down tight, make certain that the lock knob
indentions drop down over the lock buttons.
This will prevent accidental loosening of the
magazine due to vibration.
FILM
LOOP PRESSURE PLATE
FEED SPOOL
t
FILM ter 41AKE.UP
FILM
LOOP, I 'a, SPOOL ,
-? 66 6 CARTRIDGE
Figure 1-11. Inserting Cartridge into Magazine
Declassified and Approved For Release 2014/01/06 ICIA-RDP701300198R000700010007-2
4
Declassified and Approved For Release 2014/01/06 : CIA-RDP70600198R000700010007-2
It
1-33. SIMPLIFIED OPERATING PROCEDURE.
a. Check installation of camera equipment in air-
craft to make certain that all attaching parts and
connections are secure. 4
b. Load and install the magazine (paragraph 1-32).
c. If local control of the camera is desired, set;
the shutter aperturd, camera speed and lens dia-
phragm as instructed in paragraph 1-5.
d. If the camera is to be operated remotely by
the pilot during flight, set the camera speed and
lens diaphragm as instructed in paragraph 1-6.
?
Sections I -
The pilot then must determine the light conditions
(BRIGHT, HAZY or DULL) during flight, and set
the remote shutter control switch accordingly.
e. For extreme cold temperatures, plug the ex-
ternal lens heating unit into the jack plug at the
front of the camera and turn the remote shutter
- control switch to any one of its three light-setting
positions at least one-half hour before the camera
is to be operated. ?? ,
C. When photography has been completed/snap
the remote shutter control switch back into the
off position. ? .1 . ? ;
3-1. PERIODIC INSPECTION.
.. SECTION II.
,
SPECIAL SERVICE TOOLS
. NOTE
,
Except for the Type A-2 Gun Camera Bore-
sight, no special seivice tools, are required
for the proper inspection or maintenance
;
of the Type N-9 camera. ,
?
SECTION III
. .
PERIODIC INSPECTION AND LUBRICATION
Component
'Nature. of In4spection
Inspection
,
Component
Nature of Inspection
Inspection
Time
Time Magazine Teeth unbroken and free Daily
sprockets of film emulsion.
Camera Mounting parts and
electrical connections
?
? :secure.'
?
Shuttle tooth 'Undistorted and free of
film emulsion.
Aperture
. opening
Lens and
filters
?
Free of dirt and film
emulsion.
Clean and unscratched.
?
Daily;
Daily
Daily ?
Dally
? ? ?
Filmi Path Free of dirt and dust. , Daily.
'
Remote ex- '44 Mounting parts and Dail
'posure con- ;electrical connections
trol switch secure. '
. ,
3-2. LUBRICATION." ??? ..
?
3-3. Lubrication cif caineia pirts is required 'Only at
? regular overhaul periods whteh should net exceed
ten hours of actual camera running time. ' '
. ' -? -
Declassified and Approved For Release 2014/01/06 : CIA-RDP70600198R000700010007-2
,
Declassified and Approved For Release 2014/01/06 : CIA-RDP70600198R000700010007-2
FY ? ? ,?? ? ? 6%. R. ? ? ALI .1.11- all ? D.- GO
Paragraph 4-1
SECTION IV
MAINTENANCE
4-4. TROUBLE SHOOTING
? Trouble
Probable Cause
Remedy
Magazine film guide arm
has no tension
Film guide plunger spring
broken
Return magazine to
overhaul depot for
repair.
Magazine cover will not
close
Sprockets not seated or
pressure plate inverted
Seat sprockets and/or
Install pressure plate
properly.
Camera does not run
? Power cable loose ,
Film incorrectly threaded
"? Accumulation of dirt and
emulsion on pressure
plate
Defective over-run micro
switch or wiring ?
Micro switch too far away
. from over-run cam '
Check cable connections.
Rethread film (para.
1-32).
Clean pressure plate.
Return camera to over-
haul depot for repair.
Adjust switch (para.
4-12c).
Scratches,on film
? Pressure.plate or maga-
zine aperture dirty
Pressure plate nicked or
otherwise damaged
Clean pressure plate
and aperture.
Replace pressure plate.
Pictures consistently
? too dark or too light
Shutter control lever out
of adjustment
Faulty remote exposure
control switch
Adjust lever (para.
4-14).
Replace switch.
cPictures unsteady
Camera insecurely
mounted
Magazine ,not securely
locked
Shuttle sticking
Pressure plate springs
too weak
Tighten mounting
parts. .
Tighten lock knob until
detents drop in place.
Free the shuttle (para.
4-8).
Replace pressure plate.
Over-run! Indicator.
shows continually
Over-run lever torsion
spring broken
Return camera to over-
haul depot for repair.
8
Declassified and Approved For Release 2014/01/06 : CIA-RDP70600198R000700010007-2
Declassified and Approved For Release 2014/01/06 : CIA-RDP70600198R000700010007-2
it! AN 10-10CB-25
1: it
4)
Section IV
Paragraphs 4-2 to 4-9
1. Lens adapter
2. Fll-hd screw, 3-48 x 5/8
3. Lock washer, No. 3
4. Bdg-hd screw, 2-56 x 1/4
5. Lock washer, No. 2
6. Lens mount
7. Fil-hd screw, 3-48 x 5/16
8. Lock washer, No. 3
9. Front Cotter
10. Claw assembly
11. Bdg-hd screw, 3-48 x 5/16
12. Lock washer, No. 3
13. Bdg-hd screw, 2-56 x 3/8
14. Lock washer, No. 2
15. Guide pin
16. Set screw, 4-40x 1/4
17. Shuttle .
18. Claw frame bridge
-
Figure 4-1. Removing the Film Shuttle
4-2. CAMERA ASSEMBLY.
4-3. LENS MAINTENANCE.
4-4. CLEANING. Remove dust and lint from the
lens filters and outer surface of the lens element
with a soft, camel's hair brush. If necessary, polish
the lens element with lens cleaning tissue, using
a circular, motion and working from the center to
the edge of the glass:'
?
NOTE '
Under no circumstances should the lens be
disassembled. Avoid leaving fingerprints on '
the lens surface. ?
4-5. REPLACEMENT. To remove the lens assembly,
unscrew the three hex cap nuts from the lens adapter
studs and withdraw the complete lens assembly from
the camera. ' ?
4-6. SHUTTLE MAINTENANCE.
4-7. REMOVAL (See figure 4-1.)
a. Loosen the d magazine lock knob and remove
the film magazine. Remove the lens assembly (para-
graph 4-5). -
b. Remove four 'Mister head screws (2) and lock
washers (9) and three binding head screws (4) and
lock washers (5) and separate the front end adapter
(1) from the camera body. Do not disassemble the .
lens mount (6) from the front cover (9) unless in
need of replacement.
c. Remove two screws (11) and lock washers (12),
loosen screw (13), and carefully pry the claw as-
sembly (10) from the camera body. .Loosen the two
set screws (16) and disassemble the guide pins (15)
and shuttle (17) from the bridge (18).
4-8. INSPECTION AND REPAIR.
a. Inspect the guide pins and the guide pin openings
in the shuttle for burrs or distortion which may
cause the shuttle to bind or stick. Burrs can be
removed by polishing with crocus cloth. Make cer-
tain that the ,shuttle ears are not twisted or bent;
straighten them, if necessary, by bending carefully
with a pliers. Bent or distorted guide pins must
be replaced.
b. Clean all parts with carbon tetrachloride (Federal
Specification 0-C-141) and dry thoroughly with clean,
lint-free cloths. Wipe the exposed aperture plate
and shutter with a cloth dampened in carbon tet-
rachloride. . ?
? 1.
4-9. REASSEMBLY. (See figure 4-1.)
a. Assemble the shuttle (17) to the bridge (18)
with the guide pins (15). Apply Glyptol or similar
cement to the threads of the set screws (16) and
screw them into place. The inner end of each guide
pin must be 0.590 inch (t0.010 inch) iron center
line drawn through the shutter, bearing opening in
the bridge. When the guide pins are accurately
positioned, tighten the set screws securely.
b. Carefully install the assembled claw assembly
(10) ,to the camera body. It may be necessary to
rotate the shutter slightly during installation until
the claw enters the slot in the aperture place and
the rectangular shuttle opening fits around the shut-
ter cam. Then press , the bridge down onto the lo-
cating pins protruding through the aperture plate.
Make certain that the shutter bearing enters the
bridge bearing opening squarely. Install and tighten
the two screws (11) and lock washers (12), and the
clamping screw (13).
c. Fasten the front end adapter. (1) to the camera
body with four flllister head screws (2) and lock
washers (3) and three binding head screws (4) and
lock washers (5). Do not tighten the four [Mister
? r
Declassified and Approved For Release 2014/01/06 : CIA-RDP70600198R000700010007-2
Declassified and Approved For Release 2014/01/06 : CIA-RDP70600198R000700010007-2
Section IV AN 10-10CB-20
Paragraphs 4-,9 to 4-13
1. Bdg-hd screw, 2-56 x 3/16
2. Lock washer, No.2
3. Fil-htscrew, 5-40 x 1-1/8
4. Fil-hd screw, 5-40 x 3/4
5. Lock washer, No. 5
6. Shutter adjustment knob
7. Spring washer
8. Over-run control knob
9. Spring washer
? Figure 4-2. 'Separating the Camera Bodies
head screws at this time.
e. Loosen the six Mister head screws (3 and 4,
figure 4-2) which -assemble the ulaper camera body
to the lower camera_ body. Tighten the four front
end adapter screws securely; then' tighten the body
attachintscrews.
f. Install. the lens assembly and film Magazine.
. ,
4-10. CAMERA BODY MAINTENANCE.
4-1-1:, PARTIAL DISASSEMBLY. (See figure 4-2).
a. Remove the film magazine; the lens. assembly
? (paragraph 4L.5) and the front ' end adapter (para-
graph 4-7).
b. Remove the binding head screw (1) and lock
? washer (2) at the "V" of the cable attaching plate.
c. Remove the six Mister? head screws (3 and 4)
which attach the upper camera body to the lower
camera body and carefully separate these two as-
semblies.
The shutter adjustment knob (6) and its Spring
,washer (7) and the over-run ?control knob (8) and
its spring washer (9) can be lifted from position.
? CAUTION ?
It1g vitally important that the shutter ad-
justment knob be reinstalled in exactly the
same position that it was before removal.
Before removing this knob, make a note
of the location of the small indicating arrow
with? respect to the shutter sittings on the
? nameplate. When reinstalling the knob, posi-
tion the arrow at the proper setting and
insert the knob shaft down into place.
4-12. INSPECTION AND CLEANING.
a. Check the condition of all leadwires, and make
certain that, all' leadwire connections are secure.
10
Tighten or carefully resolder connections where
necessary.
b. Carefully blow all dust and lint from the camera
mechanism with a low pressure jet of dry, com-
pressed air. If compressed air is not available,
use a soft brush to remove dirt particles.,
? c. Inspect the micro switch next to the over-
run control to make certain that it has not loosened
and shifted due to vibration. In such instances,
it is possible for the dog on the over-run cam
to catch and jam underneath the pivoting , switch
lever, thus making the camera inoperative. To
remedy this, release the cam dog from beneath
the lever, loosen the hex nuts that attach the micro
switch to its mounting bracket, and press the switch
as far as possible toward the over-run cam. Then
tighten the hex nuts securely.
4-13. REASSEMBLY. (See figure 4-2).
a. Install the shutter adjustment knob (6) antits
spring washer (7) and the over-run control knob
(8) and its spring washer (9). Make certain that
the indicating arrow of the shutter control knob
is positioned exactly at the same setting noted
before its removal. When installing the over-run
control knob, the control knob stop pin must be
inserted behind the cam dog of the solenoid plunger
(figure 1-6).
b. Carefully assemble the upper camera body to
the lower camera body and install (but do not tighten)
the six Mister head screws (3 and 4, figure 4-2) and
lock washers (5). The two longer screws (3) must
be installed in the bottom holes toward the front
of the camera body.
c. Secure the "V" of the cable attaching plate to
the upper camera body with the binding head screw
(1) and lock washer (2).
d. Install the front end adapter (paragraph 4-9);
then tighten the six body attaching screws securely.
Declassified and Approved For Release 2014/01/06 : CIA-RDP70600198R000700010007-2
Declassified and Approved For Release 2014/01/06 : CIA-RDP70600198R000700010007-2
AN 10-10CB-25.? Section IV.
Paragraphs 4-14 to 4-19
?
4-14. OVER-RUN INDICATOR LEVER ADJUSTMENT.
a. The over-run indicator lever must be adjusted
so that the tip of the lever protrudes 0.062 (-0.015)
inch into the upper corner of the aperture opening
during the over-run cycle.
b. Remove the front end adapter (paragraph 4-7)
and upper camera body (paragraph 4-11).
c. Loosen the stud set screw (figure 4-3) and
rotate the eccentric stud to obtain the proper ad-,
justment. Then tighten the set screw securely and
reassemble the camera bodies and front end adapter
(paragraph 4-13).
4-15. FILM MAGAZINE MAINTENANCE.
4-16. PARTIAL DISASSEMBLY. (See figure 4-5.)
a. Depress the? magazine cover release button and
slide the cover (1) from the magazine. ,
b. Carefully lift out the pressure plate (2); then
remove the screw (4), lock washer (5) and film
guide assembly (3). -
c. Carefully pry the retaining rings (7 and 9) "?
from the roller studs (10), and lift off the feed
roller (6) and take-up roller (8). Remove the screws
(11) and lock washers (12) and lift the roller'studs;
(10), feed roller plate (13) and take-up roller bracket
(14) from the magazine.
d. The magazine heater (15) now can be disassembled
from the magazine by removing two flat head screws
(16), hex nuts (17) and lock washers (18) at one end
of the heater.
e. After the magazine heater has been removed,
the sprockets (19 and 23), shim washers (20, 21,
22, 24, 25 and 26), gear shaft retainer (27), heater
contact (28), and heater contact washer (29) 'are
?
? ?
free tb be.lifted from the magazine.
4-18. CLEANING AND INSPECTION.
a. Clean the aperture opening and all, removed ?
parts. carefully with a clean, lint-free cloth. Hard-
ened accumulations of dirt and film emulsion can .
be removed from film rollers, pressure plate, film t
guide ? arms and from between sprocket teeth with
a cloth dampened with acetone (Federal 'Specification ?
0-A-51b). It may be necessary to loosen dirt with an
orange stick or tooth pick.. .? I ? . ^ ?
. CAUTION
Do, not use a metal tool to remove emulsion
or accumulated dirt from the aperture open-
ing or film path parts.
?
b. Inspect the.rockets for nicked or broken teeth
and replace, if necessary. Examine the film contact.
surfacrof the pressure, plate guide rollers and
guide iarms for scratches, nicks or burrs which
may scratch the film. If defects cannot be removed
by polishing with fine crocus cloth, the defective
part,'or parts, must be replaced. '
c. Blow all dust and lint from the interior of the
magazine with a low pressure jet of dry, compres-
sed air or with a soft brush.
4-19/REASSEMBLY. (See figure 4-5.) . At tt
a. Place the heater contact washer (29), ?heater
contact (28) and gear shaft retainer (27) in position '.
within the magazine.' ?
b. Install .the sprockets (19 and 93) on. their re-
spective studs, first making certain that all shim
? t
OVER RUN
INDICATOR
LEVER
?
?- ,
APERTURE
OPENING
0.062(-0.015)IN.
Figure 4-3. Adjusting the Over-run Indicator Lever
11
Declassified and Approved For Release 2014/01/06 : CIA-RDP70600198R000700010007-2
Declassified and Approved For Release 2014/01/06 : CIA-RDP70600198R000700010007-2
Section W AN 1U-111c13-25
Paragraph 4-19
washers removed during disassembly are in place.
c. Place the magazine heater (15) within the mag-
azine and install the two flat head screws (16), hex
nuts (17) and lock washers (18).
d. Assemble the feed roller plate (13) and take-
up roller bracket (14) to the roller studs (10) and
fasten each stud in place with a screw (11) and
lock washer (12). Then secure the feed roller (6)
and take-up roller (8) to their respective studs
with the retaining rings (7 and 9).
e. Fasten the film guide assembly (3) in place
with the screw (4)' and lock washer (5) and install
the pressure plate (2).
f. Make certain that both sprockets are fully Seated,
and slide the magazine cover (1) into place. If the
cover will not go on, check to see that the pressure
plate has not been inverted in installation, and
that it is seated below the cast rail at the front
of the magazine.
g. Refer to paragraph 1-32 for the proper pro-
cedure for loading the magazine with film and for
attaching the magazine to the camera body.
1. Magazine cover
2. Pressure plate
3. Film guide assembly
4. Bdg-hd screw, 2-56 x 1/4
5. Shakeproof washer, No. 2
6. Feed roller
7. Retaining ring
8. Take-up roller
9. Retaining ring
10. Roller stud
11. Bdg-hd screw, 2-64 x 1/16
12. Shakeproof washer, No. 2
13. Feed roller plate
14. Take-up roller bracket
15. Magazine heater
16. Flat hd screw, 2-56 x 3/8
17. Brass hex nut, 2-56
18. Shakeproof washer, No. 2
19. Feed sprocket
20. Shim washer, 0.010 in.
21. Shim washer, 0.005 in.
22. Shim washer, 0.003 in.
23. Take-up sprocket
24. Shim washer, 0.010 in.
25. Shim washer, 0.005 in.
26. Shim washer, 0.003 in.
27. Gear shaft retainer
28. Heater contact
29. Heater contact washer
Figure 4-4. Disassembling the Film Magazine ,
12 ?
LDeclassified and Approved For Release 2014/01/06 : CIA-RDP/0B00198R000700010007-2