US PATENT SUBCLASS 200 / 81 R
FLUID PRESSURE

Current as of: June, 1999
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200 /   HD   ELECTRICITY: CIRCUIT MAKERS AND BREAKERS

81 RFLUID PRESSURE {8}
81.4  DF  .~> Plural switch
81.5  DF  .~> With plural operators
81.6  DF  .~> Operable to cause liquid contact flow
81.8  DF  .~> Bourdon tube type
81.9 R  DF  .~> Flow-responsive type {2}
82 R  DF  .~> Piston {5}
83 R  DF  .~> Diaphragm {17}
81 H  DF  .~> Hand operated

Unofficial Alpha Subclasses: R H

DEFINITION

Classification: 200/81

(under the class definition) Devices in which the operating means is responsive to pressure of a liquid, gas, or vapor. The pressure may be caused by a confined fluid or by the flow of a fluid.

(1) Note. This group includes devices responsive to vacuum.

SEE OR SEARCH CLASS

60, Power Plants,

632+, for one shot explosion actuated expansible chamber type motors.

92, Expansible Chamber Devices, appropriate subclasses for an expansible chamber device, per se.

235, Registers, 452, for record-sensing devices wherein a switch may be opened or closed or circuits made in accordance with areas on the record that contain coded indicia, the area where said indicia is sensed conveying particular information.

337, Electricity: Electrothermally or Thermally Actuated Switches,

114+, for electrothermally operated switches employing expansible or vaporizable fluid and subclasses 306+ for similar thermally actuated switches.