US PATENT SUBCLASS 340 / 644
.~.~.~ Switch or relay


Current as of: June, 1999
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340 /   HD   COMMUNICATIONS: ELECTRICAL

500  DF  CONDITION RESPONSIVE INDICATING SYSTEM {6}
540  DF  .~ Specific condition {18}
635  DF  .~.~ Condition of electrical apparatus {15}
644.~.~.~ Switch or relay


DEFINITION

Classification: 340/644

Switch or relay:

(under subclass 635) Subject matter wherein the monitored device is a circuit interrupter, and may be manually or automatically actuated.

SEE OR SEARCH THIS CLASS, SUBCLASS:

286.04+, for a manually actuated switch con-trolled alarm system.

540+, for switch-type sensors actuated in response to a specified condition and placed in an alarm or indicator circuit.

638+, for monitoring a circuit breaker.

SEE OR SEARCH CLASS

200, Electricity: Circuit Makers and Breakers,

312, for significant switch structure combined with an indicator for its condition. 307, Electrical Transmission or Interconnection Systems,

116+, for condition responsive switching systems.

324, Electricity: Measuring and Testing,

415+, for contact, relay, and switch testing.

327, Miscellaneous Active Electrical Nonlinear Devices, Circuits, and Systems, appropriate subclasses for miscellaneous signal systems.

335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets,

17, for significant relay structure combined with indicator for its condition.

361, Electricity: Electrical Systems and Devices,

139+, for a relay control circuit.