US PATENT SUBCLASS 417 / 44.6
.~.~.~ Dial-type sensor

Current as of: June, 1999
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417 /   HD   PUMPS

1  DF  CONDITION RESPONSIVE CONTROL OF PUMP DRIVE MOTOR {22}
44.1  DF  .~ By control of electric or magnetic drive motor {3}
44.2  DF  .~.~ Responsive to pump fluid pressure {7}
44.6.~.~.~ Dial-type sensor

DEFINITION

Classification: 417/44.6

Dial-type sensor:

(under subclass 44.2) Apparatus wherein the motor comprises an electrical circuit and the sensing means includes a dial indicator which has a rotary movement responsive to the fluid pressure and a manually adjustable set point which causes the electrical circuit to open or close when the positions of the indicator and manual set point are properly aligned.