Hydraulic Pressure and Time Indicator Page: 4 of 5
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1,288,886
the release bar 25 and thus lift the wheel 11
out of contact with the strip 12. The release
bar is provided with a pivot shaft 26 which
is provided with bearings 27 in the arms 6
5 and 8, the ends of the shaft being pointed to
engage the bearings-27. The bar 25 is bifur-
cated to receive the wheel 11 and is provided
with a cross bar 28 for lifting the spring-
controlled arms 17. When the screw 24
10 bears down on the release bar 25, this bar
will lift the wheel 11 out of contact with the
strip 12 by means of the bar 28. When the
pressure is kept up to the required amount
in the hydraulic cylinder, the pressure, act-
15 ing through the pipe 20 and the curved pipe
21 will tend to expand or straighten out and
thus lift the screw 24 off the release bar
25. The spring 19 will instantly throw the
wheel 11 down on the strip 12 and thus com-
20 mence perforating the strip to indicate that
the hydraulic press is operating with the re-
quired pressure. When the hydraulic press
is not operating, there will be no pressure in
the pipe 21 and this pipe will go back to nor-
25 mal position and press down on the screw 24
and thus cause the bar 25 to release the wheel
11 from the strip 12. The pulley 10 has an
annular peripheral groove 29 so that the
teeth of wheel 11 will not strip anything ex-
30 cept the paper strip 12. The shaft 4 of
wheel 10 is provided with ball bearings
which are inclosed in the cups 30.
For convenience in attending to the in-
terior parts, a door 31 is hinged to the cas-
35 ing at 32 and provided with a knob 32'.
What I claim, is,-
1. A pressure indicator and recorder com-
prising a recording strip, a time-actuated
mechanism for feeding said strip forward
40 continually, a recording dial for perforating
said strip when the pressure is on, and op-
erative connection of said dial and the cyl-
inder whose pressure is to be recorded, in-
cluding a bent pipe automatically expansible
45 by the pressure element carried therein, for
permitting said dial to perforate said strip
when the pressure is on and said pipe being
automatically contracted for releasing said
dial from said strip when the pressure in
5o said cylinder ceases.
2. A pressure indicator and recorder coin-
prising a record strip, a time-actuated mech-
anism for feeding said strip forward con-
tinually, a recording dial for perforating
55 said strip standing normally out of engage-
ment of strip, and operative connection of
said dial with the cylinder whose pressure is
to be indicated and recorded for causing
said dial to engage and perforate said strip
60 when the required pressure is in the cylinder
and for disengaging said dial from said
strip when the pressure in said cylinder is
insufficient or has ceased.
3. A pressure indicator and recorder com-
65 prising a record strip, a time-actuated mech-anism and gearing for feeding said strip
forward continually, a recording dial for
perforating said strip standing normally out
of engagement with said strip, and operative
connections of said dial with the cylinder 70
whose pressure is to be indicated and re-
corded including a bent pipe connected to
said cylinder and controlling devices for
causing said dial to engage and perforate
said strip when the required pressure is in 75
said cylinder and for disengaging said dial
from said strip when the pressure in said
cylinder is insufficient or ceases.
4. A pressure indicator and recorder com-
prising a strip containing marks indicating 80
hours and minutes, a time-actuated mecha-
nism for feeding said strip forward con-
tinually, a recording dial standing normally
out of engagement with said strip, and op-
erative connections of said dial with the cyl- 85
inder whose pressure is to be indicated and
recorded including a bent pipe having com-
munication with the interior of said cylinder
and a regulating screw carried by said pipe
and a controlling device to be engaged by 90
said screw for causing said dial to engage
said strip and perforate the same when the
required pressure is in said cylinder and to
disengage said dial from said strip when the
pressure in said cylinder is insufficient or 95
ceases.
5. A pressure indicator and recorder com-
prising a record strip, a time-actuated mech-
anism for feeding said strip forward con-
tinually, a recording dial standing normally 100
out of engagement with said strip, a spring
for causing positive action of said dial, and
operative connections of said dial with the
interior of the cylinder whose pressure is to
be indicated and recorded including a bent 105
pipe and controlling devices causing said
dial to engage said strip when the required
pressure is in said cylinder and for disen-
gaging said strip when the pressure in said
cylinder is insufficient or ceases. 110
6. A pressure indicator and recorder com-
prising a record strip, a time-actuated mech-
anism for feeding said strip forward con-
tinually, including a bearing wheel having
an annular groove therein and supporting 115
said strip and a gravity-actuated wheel bear-
ing on said strip, a recording dial standing
normally out of engagement with said strip,
operative connection of said dial with the
cylinder whose pressure is to be indicated 120
and recorded including a bent pipe com-
municating with the interior of said cylin-
der, a spring for causing positive action of
said dial, and means controlled by said bent
pipe for causing said dial to engage said 125
strip when the required pressure is in said
cylinder and for disengaging said dial from
said strip when the required pressure in said
cylinder ceases.
7. A pressure indicator and recorder com- 130'a
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Reference the current page of this Patent.
Helm, Clyde D. Hydraulic Pressure and Time Indicator, patent, December 24, 1918; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth1256535/m1/4/?q=%22%22~1: accessed July 4, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.