US PATENT SUBCLASS 246 / 228
.~.~.~.~.~ Circuit changers

Current as of: June, 1999
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246 /   HD   RAILWAY SWITCHES AND SIGNALS

218  DF  ELECTRIC ACTUATION {9}
221  DF  .~ Motor systems {5}
225  DF  .~.~ Reciprocating armature {4}
226  DF  .~.~.~ Controller-actuated switches {2}
227  DF  .~.~.~.~ Opposed magnets {2}
228.~.~.~.~.~ Circuit changers

DEFINITION

Classification: 246/228

Subject matter under subclasss 227 having a circuit-changer which is moved electrically or mechanically.

SEE OR SEARCH THIS CLASS, SUBCLASS:

232, and 242, for similar motor actuation of switches where the motor is not controller-actuated.

246+, and all subclasses mentioned in the search notes appended thereto, for various types of circuit-controllers.

SEE OR SEARCH CLASS

361, Electricity: Electrical Systems and Devices,

245+, for polarity reversing.