US PATENT SUBCLASS 361 / 280
.~.~ Responsive to external condition

Current as of: June, 1999
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361 /   HD   ELECTRICITY: ELECTRICAL SYSTEMS AND DEVICES

271  DF  ELECTROSTATIC CAPACITORS {4}
277  DF  .~ Variable {4}
280.~.~ Responsive to external condition {6}
281  DF  .~.~.~> Electrical
282  DF  .~.~.~> Thermal
283.1  DF  .~.~.~> Pressure {3}
284  DF  .~.~.~> Liquid level
285  DF  .~.~.~> Fluid flow
286  DF  .~.~.~> Humidity

DEFINITION

Classification: 361/280

Responsive to external condition:

(under subclass 277) Subject matter in which the capacitance varies in reaction to an external condition.

(1) Note. The capacitor is designed specifically to be responsive to external conditions, for example, a diaphragm plate sensitive to pressure changes.

SEE OR SEARCH THIS CLASS, SUBCLASS:

311+, for particular materials that may be specifically disclosed as being responsive to conditions.

SEE OR SEARCH CLASS

307, Electrical Transmission or Interconnection Systems,

116+, for condition responsive circuits in switching systems.

324, Electricity: Measuring and Testing, 658+, for systems measuring the capacity of a capacitor, and subclasses 109 and 111+ for electric meters having capacitors.

327, Miscellaneous Active Electrical Nonlinear Devices, Circuits, and Systems,

509+, for miscellaneous external effect circuits.

332, Modulators, particularly

136, and 175 for variable capacitors used in a modulator.

340, Communications: Electrical,

500+, for condition responsive circuits in communication systems.