Satin
tua olets
sh
iam
wea
ats
tasanaaiade
An aluminized surface coating was used on the blanks instead of the
machinist bluing used previously, (Reference 1).
This type of surface
was less susceptible to damage from water, was more even, rugged and
“Retin Nitey
“tenrmmenmerani sent
Unfortunately, the thickness and quality of the
coating varied greatly and though extreme care was used in the selection of blanks it was not always possible to do more than approach |
these ideal conditions.
serartereaaeni
ifom sai)
B.2
(oo
Hownoenee
renainmr,
eo
was less than 0.3 mil.
(0 tog
orere rng
oéenteral
cleaner. A very five sharp edged scratch was produced by the stylus
needle. Under ideal conditions with a uniform coating the scrateh width
PRESSURE-TIME GAGE (STANDARD)
‘Vb.
2,1
£
General
ry}
om
The pressure-time gage was the basic instrument used during
“~ “CASTLE to obtain the measurements required by the objectives of Project
i. abi. Several pilot models were field tested by BRL during UPSHOTKNQIHOLE (Reference 1). The basic ideas and the test results were
combiined and a final design prepared. A quantity of these gages were
fabrieated and shipped directly to the Pacific Proving Grounds.
Lack
of time pyegluded any preliminary tests on the gage.
The gages were
either phosd-initiated or thermal initiated and used a small D. C. motor
to drive /t fe\ recording disk. A delay switch was incorporated which
would stéetldperatiing at zero time and stop the recording at any pre-
set time up to 1-1/2 minutes.
The entire unit was encased in a 12
inch length of |acinch pipe. A 3-inch pipe cap was welded to the bottom of the pipe , to. give an auxiliary mounting system.
The gage assembled to a 3-'n-h
crime gcunt ig shown in Figure C.16. An adaptor ring,
with 6-inch tne
ze threads was bolted on the standard 6-inch
pipe mount aul -’:
‘inced inside the mount and bolted to the adaptor (see Fig.r: J vd
. order to insure quick recovery, three methods
were providel:
(1°) ‘ha ‘c' se with adaptor ring attached could be unscrewed from the mount , (2}
Khe gage could be unbolted from the adap-
tor ring and the entire gage
lifted from the mount, and (3) the top
plate and entire gage mechanism could be unbolted from the flange of
the gage case and removed, ‘Meaving the case still in place inside the
mount.
B.2.2
Recording System
Pe
Le
U
The recording blank consisted of"jan aluminized coated glass disk
%3 1/2 inches in diameter.
The disk wap jmounted on a turntable which was
mounted perpendicular to the plane of
dard pressure capsule was assembled toi
tHe pressure capsule.
the stylus in position against the recordin
The drive motor was an A. W. Haydon
metrically governed, 6 volt D. C. motor.
battery provided the power to the motor.
The stan-
the face plate of the gage with
Lok.
Coitype 5600 series chrono-
A Sfgnal Corps type BA 210/V
Motor! specifications indica-
ted a speed variation of 1 percent or less would OpGtenif the motor
were subjected to vibrations of 5-300 eps with 1o
imum acceleration. ‘The various major components of the gage ari
ustrated in
Figures C.3 and C.4.
The recording speed selected was 3 rpm which in almost every cese
insured that the full pressure-time phenomena was recorded on a single
57