SPEED LETTERTO (Sanitized)

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78B05703A000200010003-0
• Release Decision: RIPPUB
• Original Classification: K
• Document Page Count: 6
• Document Creation Date: December 28, 2016
• Document Release Date: February 26, 2004
• Sequence Number: 3
• Publication Date: December 31, 1970
• Content Type: LETTER

Approved For Release 2004/03/26 : CIA-RDP78BO5703A000200010003-0
/~/~?Y?I?
(MEMORANDUM FOR:
The TSG test and evaluation people have
rejected the prototype 0 1540 light table.
Attached are some of the specifics. We should
hear from [] in about a week or so their
reaction.
tells me that this will not
slow up production of tables, although they are
quite anxious for the corrections to be made
so that we will not have a number of them de-
livered that contain these deficiencies. TSG
will keep us posted on how this goes.
(4 Jan 70)
(DATE)
FORM NO. 101 REPLACES FORM 10.101
1 AUG 54 WHICH MAY BE USED.
DECLASS REVIEW by NGA
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 Approved'P r Release 2004/03/26 : CIA-RDP78B0M3A000200010003-0 -
STAT
SPEED LETTER
Engineering Support Division _ST T
-1 1 1. The Preproduction Model, Split Format Light Table 15'Model ST IT
STAT
3. Certain unsatisfactory Quality Control conditions were found
during initial inspection of fourteen production tables. These conditions
are listed in Attachment 2.
-l. It is requested that the Contractor provide the Contracting
Officer with his course of action concerning correction of the defects and
Quality Control conditions listed on the attachments.
Deputy Chief
Engineering Support Divisions TSG, NP Ia'_
SIGNATURE
MLT 15L0) Serial No. 001 submitted under the terms of
's hereby rejected.
2. Attachment 1 is a list of defects found in the course of testing
Serial No. 001.
FORM
5-67 x31831
Approved For Release 2004/01261-
USE PREVIOUS
EDITIONS
 Appro lF Ca-I 04I0 #e84 W 02X10003-0
1. The table tilts by lifting the back of the unit and hinging
the front. This creates a nutcracker effect at the hinge.
The tilt switch is located very close to the hinge, and it has
been determined that an operator could very easily suffer crushed
fingers hi le operating the switch.
2. The Y motion is locked when the table is tilted. This system
is actuated by a mercury switch. The adjustment required to pro-
vide this locking feature just after tilting starts, and to
release the lock after it becomes horizontal, is quite touchy.
The prototype table is just as likely to be locked in the horizon-
tal position as unlocked. If this is relieved, the carriage may
start to roll forward when tilting occurs before locking takes
place.
3. Using a gauge configured to show the maximum overall width of
a 6.6" film reel, it was found that interferences exist at al l
reel stations, Further checks on the production models available
at that, time showed that 23 of 2L. stations checked are too narrow
and will not accept the 6.822 inch dimension specified.
1. The cable which connects the focus mechanism to the power,
supply and electronics at the back of the table prevents the
....,
focus mechanism from realizing full travel to the back of the
vi ewi n_g surface.
5. Markers are provided on the table to aid in placing the motors
and idlers for various film configurations. The motors have
matching markers on one side. However, the motors must be used in
such a way that the side not containing the marker is in view.
Consequently, markers must be placed on both sides.
6. The NLT is made in two parts, an elevating stand and the light
table proper. If the light table is not put an the stand at the
right place, or if it shifts while being transported, the lower
Attachment 1 3 1 DEC
Para. 3.6.5 (4) - ;bving parts such as ventilat
fans, drive belts, or gears, shall be shiel:_ef_
enclosed to prevent inadvertent access by the
operator.
Para. 3.5.1.4.2 - A manual bridge furnished
tilting stand shall be provided with an optic:
LL
fail-safe override to prevent uncontrolled TMct_c::.
in the Y direction when the table is tilted.
move the carriage in the Y direction with the
horizontal, it shall be necessary only to r el
the Y friction lock. In a tilted position, a
safe interlock shall be activated preventing Y
translation unless the interlock is purposely
defeated.
Para. 2 - The table shall accommodate spools
ranging up to and including the size of spool
sneci fiec in Military Standard VS26565-22 loads__
to capacity with film.
Para. 3.4.1.2 - With any of the mi crostereosc^_ PF
fixed in the mount, and using the center of the
scope as a reference, translation in the Y dir,
shall be adequate to cover the full 15" depth
the glass viewing surface.
Para. 3.3.1.2 - A visual reference scale and
ing device with positive deten_ts shall be rror
to allow accurate positioning of the brackets
hold the various width spools and assure abbe e
tracking across the glass viewing surfaces of :..
film parallel to the longitudinal axis of the ___
table and to each other.
Para. 2 - Provision_ shall be made for viewing..
in-line viewing of two of the same -.^ dths, of `,
5", 6.6", or 9.5" wide film.
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 Approved For Release 2004/03/26 : CIA-RDP78BO5703A000200010003-0
cover is prevented from dropping by the tilt and elevating
switch housing. The lower cover will not open when the table
is tilted,
7. The mechanism which takes up the dead loop at the center of
the table employs cable guides which hold the actuating
mechanism in its track. These cable guides have profiles which
prevent the looping mechanism from reversing direction at one
point in its travel.
8. The lower cover latches are very difficult to operate, due
to their placement and design.
9. The illumination sources are not equal within 100 fL at
maxim=. The left measured 3225 fL max and the right 3010 fL max.
The change in output of one side when the other is turned
completely down or up should not exceed 100 fL. This change was
measured to be 150 fL on the left side and 165 fL on the right
side.
10. The screws holding the pod in the optics mount do not
provide adequate force to prevent unwanted motion.
11. There have been instances of evidence of poor quality con-
trol. a) The bearing track on the left side was not fastened
tightly. b) The plastic protector covers on the Y chain drives
dragged the chain and drive elements. c) The power cord reel
fell off of the unit, tilt
d) The lock mercury switch was not
set -properly.
Para. 2 - The table shall include a simple
looping mechanism which shall allow form in.g
of film below rile table- y-n order that se-carat _ c.
frames, on the same roll of film, may be arral.-
adjacent to each other for convenient stereo
viewing. Looping of parallel r07 -, of =il is
required. This mechanism shall be capable o-
forming a continuous film loon from 0 to 70 = _ _.. .
this respect, it is understood that the locat_.r
of the controls, as surplled on the nreproducc..
model (when accented), r.i 11 be satisfactory.
positioned so they can be easily manipulated.
Para 3.2.1.E - All controls. including the fi=r:,
hard wheels (on the manual version), shall be
Para. 3-1-1-1 - The maxLm:rr, levels of the two
illumination sources shall not differ by more
100 foot lamberts at the tine of tl.lis measu_rejme__'., .
With one of the two sources set at maximum or
minimum illumination level, there shall not be a
change of more than 100 foot lamberts in ill- ii-
Lion level of that source ,,Then the ' -~ ~minatic
level of the other source is adjusted throng c,_1:1,
its full range.
Para 3.5.1 - Mounting devices shall be suffic:_ __:;.
rigid to preclude instrument misalignment and 10
of collimation of the optics with respect to '....
viewing surface during normal handling and
operation.
Contract, Page 3, ACCEPTANCE - Final i nsnectib__
and acceptance of articles shall be b y demcnst -u
of successful performance and completion of te.s
set forth in a mutually approved Acceptance
Plan (ATP), which s all be prov i deter for rC '.y
two (2) weeks prior to co?mencement of tests _
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 Approved For Release 2004/03/26 : CIA-RDP78BO5703A000200010003-0
Para. 11 (continued)
Contract, Page fl
Supplies furnished tinder this Contract ,.---
be free from defects in material or w,Tor p sh
and will conform With the Specifications and
other requirements of this Contract.
l2. The color rendering index (C--:),I), correlated color temperature Para. 3.1.1.2
(CCT), and chromaticity aim points (X, Y) were measured for each
side and are listed below.
5000=500K
CI-RI 7 70
COT
Left Side Right Side x 0.3-5
Y 0.358
CCT 5574 5689 5565 5706
CRI 57.69 55.28 57.53 55.93
X 0.330# 0.3278 0.3311 0.3275
Y 0.3626 0.3616 0.3659 0.36l4
STAT
TEST & EVALUATION BRANCH, ESD, TSG
Approved For Release 2004/03/26 : CIA-RDP78BO5703A000200010003-0
 lfto~ 3 1 DEC 1970
ApproveaTor Release 2004/03/26 : CIA-RDP78BO5703A000200010003-0
Attachment 2
Non-AcceItable Z.C. Conditions found on 1st Inspection of 14 Production Tables
1. Motor and Idler Tight on ].tails
SIN 002, 003, oo4, 005, 006, 017, 022, 015, 026
2. Loop Take-up Slil)p-.,-nL,,
SIN 004, 026, 023, 017
3. Parallelism
SIN 002, 003, 0011, 005, 006 (not checked on others)
4. Collimation
SIN 002, 003, 004, 005, 006 (not checked on others)
5. Covers Interferring with X&Y Travel
SIN 003, 004, 023, 016, 015, 022, 024
6. Spool Release on Motor Sticking
SIN 003
7. X&Y Drive Creep in Off Position
SIN 005, ooh, 022, 004
Carriage Exceeds 4 lb Spec
SIN 003, 001-, 023, 016, 015, 022
9. Film Jerky in Slow Speed
SIN 006, 023, 016, 015, 022, 017, 024, 014, 009
10. Lamps not Working (flicker and tubes not coming on)
SIN oo6, 0021, 026, 023, 015, 022, 017, 014
1l. Glass Top Scratched
SIN 026, 017, 024
12. Dimmer Switch Rough
SIN oo6, 003
13. Pod Ring Too Tight
SIN 002, 003, 004, 005, Oo6, 016
14. No Light Control
SIN 026, 007
15. Front Top Trim Rough
SIN 011, 026, 024, 01-6
EQUIPMENT PERK' ORMANCE BRANCH, ESD, TSG,:
Approved For Release 2004/03/26 : CIA-RDP78BO5703A000200010003-0