ameter of 3.15 inches and height of l inch.
An aluminized ccating was
applied to the outside surface (see Figure C.2).
The cylinder vas held
;
the pressure element, two accelerometer elezents could be installed in
the gage on post provided for them. Dry batteries supplied ccwer to
{the initiation circuit and motor, the instrument being completely self-
; fontained,
\ La]
The gage was fitted with a rubber sealing gasket and encased in
‘ae hort section of 5-inch pipe. A pipe cap welded to the bot<om of
oy
i
:
BV.
eet
=
-
_
ry | NN
; FWO. (OFF
AY
“
~
re,tay
.
assembly along its shaft. The drum rotated at 6 rpm and advazzed 0.025
inches per turn. The standard pressure elezents were used in the gage.
The recording drum moved past the pressure element stylus poinz at a
speed of approximately 1 in./sec. and a helical base line was zenerated.
Figure C.6 shows a view of the gage without its case.
In addizicn to
REV.
~
_
(for
to
T
SIGMA RELAY
100K JL
iP40 PHOTOTUSE
Figure B.1
MOTOR
x
hea
sentry,
pers avitrecrte
“henteerenaneran
sate renewal
in a drum-like assembly mounted on a threaded shaft. Througs 2 set of
gears, a 6 volt D.C. chronometrally governed motor drove the ér=
ADVANCE
RELAY
7
[es
E
Drum gude|schenatic diagram.
the case sealed it and allowed the gage t
e screwed onto @ 35-inch
pipe if that method of installation was desired. A steel moatmting-~
ring was provided for installing the gage ih the regular 6-irncn pipe
ia
nount.
B.3.2
Initiation
pond
LL.
The drum gage was started by a photoelectric’ circuit {see Figure
B.1 for Drum Gage Schematic Diagram).
This circuit wap
iemed so that
the incident light from the detonation would permit e
current to
relay and power wag supplied to the constant-speed motor.
‘The 1P40
flow through the coll of the very sensitive Sigma rel
9°
32 its
contacts to close.
The Sigma contacts closing energi ledth e a3vance
59
a