LETTER TO (SANITIZED) FROM (SANITIZED)

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78-03642A001700020013-7
• Release Decision: RIPPUB
• Original Classification: S
• Document Page Count: 5
• Document Creation Date: December 22, 2016
• Document Release Date: May 31, 2012
• Sequence Number: 13
• Publication Date: August 22, 1957
• Content Type: LETTER

Declassified in Part - Sanitized Copy Approved for Release 2012/05/31 : CIA-RDP78-03642A001700020013-7X1
August 22, 1957 25X1
CONFIDENTIAL
This reports progress during July, 1957, on
tthee(develo meat of an Equipment Safeguard Unit which
h 1 mee We foIlawirit -re-quir-e-manta s
1. The unit shall be wholly contained
in a weather-tiht enclosure of diiensions
approximately b x 5-3/14." x L" (dimensions
to most AN rack mounted equipment specifi-
cations),
2. The unit shall initiate two strands
of Primacord turough reliable independent
explosive trains.
3. The unit shall be so designed as to
prevent accidental initiation by requiring
two-handed operation.
4. The unit shall rovide a reliable
time delay of at least conds between
actuation and initiation. J5?5
5. The unit shall pass environmental
tests necessary for qualification under
Military Specification MIL-E-5272A, titled
"Environmental resting, Aeronautical and
Associated Equipment, General Specifications
for,"
-71 Doc HL Y (i~rF O, T
d
y
C
_
lt
~
Q~
Qf,lu Cs; in .QED t i tY Q d
cl., L
04;f .SS ONF L., IA
-`
~XT
--
FiEY
Declassified in Part - Sanitized Copy Approved for Release 2012/05/31 : CIA-RDP78-03642A001700020013-7
 Declassified in Part - Sanitized Copy Approved for Release 2012/05/31 : CIA-RDP78-03642AO01700020013-7
6. The unit shall be so designed as to
permit surveillance and replacement of explosive
and pyrotechnic components periodically.
7. `"7e unit shall be detonator safe; that
is, initiation of the detonators in the safe
position shall not initiate the succeeding elements
in the explosive train, nor shall such initiation
throw fragments or particles from the weather-
tight enclosure.
PROGRESS
During the period covered by this report, a new
design was made incorporating the features outlined in
last month's report (namely, L1. delay columns, two boosters,
and new lever and safety button combination). '."his design
is shown on Drawing E12502. The rotor, having 1 delay
columns located two each in parallel planes at 900 to each
othsq, is shown on Drawing D12503 and the rotor housing
with the two boosters and primacord entrances is shown on
Drawing D12513.
A model was made of this design and is shown in
the picture attached to this report. "'his model was made
with teflon bearings and teflon faced firing pins to out
down on friction, and :ias a rotor return spring. The
teflon bearings were replaced with bronze bearings without
affecting the functioning of the .odel. The model functions
well mechanically and will be used for immersion tests.
The loading of the delay column and boosters
was discussed with loading engineers at Atlas' Reynolds
Experimental !laboratory. As a result of this discussion,
the booster length was shortened to 3/4" and four test
blocks simulating the booster containing portion of the
rotor housing, with the exit portion of the delay columns
in rotor, were fabricated for the purposes of testing
booster propagation (since leads enter side of booster)
and fragmentation, if any, caused by booster detonation.
Pending.,; satisfactory results of these tests, five rotor
and rotor housing combinations will be fabricated and
used for delay column testing and static safety tests.
Any design changes and model fabrication are being held
pendir the results of these tests.
Declassified in Part - Sanitized Copy Approved for Release 2012/05/31 : CIA-RDP78-03642AO01700020013-7
 Declassified in Part - Sanitized Copy Approved for Release 2012/05/31 : CIA-RDP78-03642AO01700020013-7
- 3 -
A series of primacord fittings has been designed,
molds fabricated, and limited quantities of fittings fab-
ricated. These fittings are shown in simulated use on
inert primacord, and separately in the photographs attached
to this report. Used with each Is a primacord end cup, as
sh,.wn in Drawing A12514. Drawings of the fittings are as
follows:
Long Nut Drawing A12516
Long Union - Drawing A12520
Short Union Drawing A12519
Split Tee - Drawing A12517
Propagation tests using t ,ese fittin s will be
performed in the near future.
In the immediate future, limited explosive tests
of various types for propagation and static safety will be
performed to determine if design changes are necessary in
Design E12502. Also, propagation tests using the primacord
fittings will be performed. Satisfactory results of these
tests will mean that fabrication of models for test and
delivery can be started immediately,
STATUS OF FUNDS
Funds Allocated $ 33,685.62
Previous Expenditures 49948,48
Balance at Beginning of Period 28,737.14
Expend' ture During Period 8,526.86
Bala ice at- end of Period 20,210.28
Declassified in Part - Sanitized Copy Approved for Release 2012/05/31 : CIA-RDP78-03642AO01700020013-7
 Declassified in Part - Sanitized Copy Approved for Release 2012/05/31 : CIA-RDP78-03642AO01700020013-7
-4-
Very truly yours
Declassified in Part - Sanitized Copy Approved for Release 2012/05/31 : CIA-RDP78-03642AO01700020013-7
 Declassified in Part - Sanitized Copy Approved for Release 2012/05/31 : CIA-RDP78-03642AO01700020013-7
Iq
Next 2 Page(s) In Document Denied
Declassified in Part - Sanitized Copy Approved for Release 2012/05/31 : CIA-RDP78-03642AO01700020013-7