(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.
