PROGRESS REPORT - 552 AND 552A FOR JULY 1967

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78B04747A002900040014-2
• Release Decision: RIPPUB
• Original Classification: K
• Document Page Count: 9
• Document Creation Date: December 28, 2016
• Document Release Date: November 25, 2002
• Sequence Number: 14
• Publication Date: August 11, 1967
• Content Type: REPORT

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8: CIA-RDP78BO4747AOW2900040014-2
11 August 1967
552-552A-OD-337
PROGRESS REPORT - 552 and 552A
For July 1967
552-101
Work performed on this system during this reporting
period was to repair the compressor-vacuum pump. Investigation
of unusual compressor noise found cracked inner races of (2)
connecting rods ball bearings. A local supplier in Washington
D. C. rebuilt the compressor and by borrowing vacuum pump parts
from 552A #101, the 552 system was operational on July 24, 1967.
The above effort completes work on this system as
lens centering effort in June proved satisfactory by confirming
optical axis shift of the 3 higher magnification objectives to
within 20 micron diameter point mark.
Work on Laser Point Marking in May significantly
improved marking quality and reliability by modifying laser power
supply and trigger electronics, increasing capacity of line re-
gulation, replacing one crystal and adding an optical adjustment
to aid alignment of laser output. The result of this work was to
make system's point marking capability acceptable by customer.
Therefore, with the refinements on point marking, lens
centering and compressor breakdown, system was accepted by customer.
The manual reproducible drawings and spare parts list
(in manual) will be delivered in August to complete deliverable
items of this contract.
Declass Review by NIMA/DOD
Approved For Release 2003/01/28 : CIA-RDP78BO4747AO02900040014-2
 Approved For Release 2003/01
/28 : CIA-RDP78B04747A002900040014-2
Several trips were made during July to complete installa-
tions of this system. Work consisted of revising circuits in motor-
ized film drive in the following areas:
1. Powered loop withdrawal brake release to prevent
restraint of idling film drive on supply spool
side, by spool brakes.
2. Prevention of excess film tension at completion of
loop withdrawal. With high speed drive operation
to reduce loop length, film could be stalled against
a locked spool causing light film tension and a drive
overload. The drive is stopped before zero loop is
obtained and loop mechanism has to be put in "return"
mode to complete loop withdrawal.
3. Prevention of film drive stall on fixed side in loop
forming mode. By eliminating possible drive operation
of brake, spool in loop forming operation film drive
cannot be overloaded.
4. Power assist mode drive reversal permits system to
handle all film windings on spools customer uses.
operation in reverse direction requires proper setting
of mechanical controls at spool spindles.
During film drive trials, film scratching by center hold-
down was noticeable. We are refinishing the spring fringes on the
holddown bars and completed holddown rework should be installed in
August. At that time, air pressure below film will be reduced to
further reducing scratching.
ENCLOSURE
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