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.
