US PATENT SUBCLASS 307 / 139
.~ Switch actuation

Current as of: June, 1999
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307 /   HD   ELECTRICAL TRANSMISSION OR INTERCONNECTION SYSTEMS

112  DF  SWITCHING SYSTEMS {5}
139.~ Switch actuation {5}
140  DF  .~.~> Power circuit controlled
141  DF  .~.~> With time delay or retardation means {2}
142  DF  .~.~> With locking, holding or braking means
143  DF  .~.~> Electrical actuator
144  DF  .~.~> Fluid-pressure actuator

DEFINITION

Classification: 307/139

(under subclass 112) Subject matter having means for actuating the switch.

(1) Note. This subclass relates, for example, to systems having means to actuate the switch by both electrical and mechanical means.

SEE OR SEARCH CLASS

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

2+, for electromagnetically operated switches, per se.