US PATENT SUBCLASS 246 / 242 R
.~.~.~ 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}
240  DF  .~.~ Rotary armature {3}
242 R.~.~.~ Circuit changers {2}
242 A  DF  .~.~.~.~> Overload release
242 B  DF  .~.~.~.~> Dual selector circuit {1}

Unofficial Alpha Subclasses: R A B C

DEFINITION

Classification: 246/242

(under subclass 240) Subject matter in which automatic means are provided for changing or modifying the circuits.

SEE OR SEARCH THIS CLASS, SUBCLASS:

228, and 232, for reciprocating-armature circuit-changer systems.

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.