DATA BLOCK READER SPECIFICATIONS

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78B04747A001600010076-1
• Release Decision: RIPPUB
• Original Classification: S
• Document Page Count: 4
• Document Creation Date: December 28, 2016
• Document Release Date: March 1, 2000
• Sequence Number: 76
• Content Type: REQ

Approved For Re ,se 2001/0 RDP78B04747A001600010076-1
DATA BLOCK READER SPECIFICATIONS
The reader is an optical/electromechanical/solid state
device for reading and. transcribing binary data from &ftlarea
of 3" x 3" inches on film widths of 35mm, 70mm, 5 inch, 6.6
inch, 8 inch and 9-1/2 inch. The reader will accomodate
standard film reels. Recommended maximums are:
a. 35. - 70 nun 1000 ft reels, 10-1/2 inch diameter
b. 5 inch - 6.6 inch 500 ft reels, 7-3/Li inch diameter
c. 8 inch - 9-1/2 inch 250 ft reels, 6 inch diameter
CABINET AND F.'4AT?TE
The reader is contructed with a rugged framework of
welded steel angle. The enclosing panels are easily removable
for necessary maintenance and inspection. The right side panel
is hinged for operator accessibility for changing plugboard
requirements or data block formats.
aLECT12ONIC UNIT AND RELAY CHASSIS :
The electronic unit utilizes solid state devices and is
accessible through the left side panel. Four circuits per
plug-in package may be removed for servicing or replacement.
the relay chassis is available at the back and may be swung
out for accessibility to all areas for servicing.
FIit1/M TRANSPORT
Film passes over neoprene coated rollers and between a
glass platen separated so that the film will have minimum contact
to prevent film wear or scratches. In high speed drive (forward
or backward) the neoprene rollers are free to rotate with the
film. In low speed drive (read or reverse) the left hand neoprene
roller drives the film in either direction and film is taken up
by adjustable torque motors. The system controls are so designed
that interlocks make it impossible to damage the film by operator's
rdi.s-use of controls.
INACGE POSITIONING
Any 3 inch area of the width of the film may be positioned
on the data blocks by depressing the traverse IN or OUT switches
which shift the entire film transport. Film tracking or skew
can be corrected by rotating the entire projection plate. This
will facilitate reading data information that is not photographed
parrellel with the edge of the film.
HANDLE VIA TALENT.
KEYHOLE CHANNELS
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OPERkTOR CONTROLS
After film is loadad between take up spindles, the operator
may advance film at either high or low speed in order to position
data image on the data block. All operator controls are by push
button switches and are interlocked to prevent faik-1 y operation.
The operator presses ALIGN and either presses the traverse switches
or rotates the projection plate or both in order to center the
data information over the data block.
The operator has control of all constant information to be
punched such as Mission number, Pass number, etc; by setting a series
of thumbwheel switches previous to starting. This information will
be punched on the cards a in a position determined by
plugboard tiiii.ring. All card data can be so arranged.
With the alignment completed and all fixed data set, the operator
will start the reading by pushbutton. An automatic frame counter
will punch each frame number on the card and on 2y needs at the beginning of each new pass. This frame numbercanebe positioned
at any column on the card by plugboard.
An error circuit will indicate to the operator whenever the
time information of the frame being read is not
greater than the previous clock. At operator option, the error
indicator will stop the reading and film transport for reversing
the film and verifying the data image.
Other operator controls:
a. Power. Single button controls on and off.
b. Test. - Allows testing the reading block statically
and indicates by panel lights what information
was read,
c. Punch. -Allows VHzWmg punching of all fixed information
and frame number with the exception of not
punching any image data. Its anticipated use
is when data information is obscured by fog
and a card is required to maintain continuety.
d. Repeat. - Allows repeating a frame already read for checking
reading accuracy. It does not advance the frame
counter.
e. Reset. - Resets all electronics but not frame counter.
Used whenever the key punch fails to advance a
card properely such as a card jam.
f. lamp control or density control. - Provides the operator
a control of the lamp brilliance and must be set
to the base density of the film. A lamp will
indicate when properly set at the beginning of
each reel.
All alignenn -.
and operator monitoring is accomplished by viewing
information through a front panel window
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Reading speed is limited to the speed of the type 026 IBM key
punch. The speed is approximately 13 cards (or frames) per minute.
High speed operation exceeds 300 ft. per minute., used to rewind
a roll of film or advance rapidly to a given section of the roll.
ANTICIPATED INTPROVEMENTS
After the equipment is operational and when time permits, the
following improvements be added.
a. An indicator will warn the operator whenever the data
image is not tracking properly over the data block. If
posible, the alignment will be automatic.
be An automatic rewind will be preset by the operator to
the last frame number on the reel. When the last frame
is read, the film will automatically rewind to a pre-
determined point of the reel, either to the start of a
leader or until all film is offthe takeup reel, then
automatically stop.
co A higher speed output device can be considered and the
film read spend increased for higher output.
d. Two read heads and electronics could be combined to check
each other for accuracy.
e. The electronics can be modified to accept negative film if
necessary. Only positive film can be read at present.
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KEYHOLE CHANNELS
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Approved For Relea, a 2001/08/21 .CIA-RDP78B0747A001 000
HANDLE VIA TALENT-KEYHOLE CONTROLS ONLY
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WARNING
"This document contains information affecting the National Defense of the United
States within the meaning of the espionage laws, Title 18, USC, Secs. 793 and 794,
the transmission or revelation of which in any manner to an unauthorised ;person is
prohibited by law".
It is to be seen only by U. S. PERSONNEL especially indoctrinated and authorised
to receive TALENT-KEYHOLE information: Its security must be maintained ,in
accordance with KEYHOLE and TALENT regulations.
Approved For Release 2001/08/21 : CIA-RDP78BO4747AO01600010076-1