US PATENT SUBCLASS 246 / 246
.~ Car-actuated circuit controllers

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

218  DF  ELECTRIC ACTUATION {9}
246.~ Car-actuated circuit controllers {6}
247  DF  .~.~> Wheel or train counting
248  DF  .~.~> Retarded action
249  DF  .~.~> Electric or magnetic
250  DF  .~.~> Single-direction actuation
251  DF  .~.~> Vertically sprung rail
252  DF  .~.~> Trolley or plow actuated

DEFINITION

Classification: 246/246

(under subclass 218) Subject matter in which circuit closing or breaking devices are actuated by the wheels or tappets of moving cars, including the so-called "track instruments" and "treadles" of railway signaling.

SEE OR SEARCH THIS CLASS, SUBCLASS:

22, 24 and 77 to 80, for manually actuated circuit controllers.

72, thru 80, 82 to 84, 88, 90, 91, 126, 127, 247 to 252, for circuit-controllers.

180, 196 and 197, for circuit controllers located on the moving vehicle.

228, 232, 235, 242, and 253, for circuit controllers actuated by the movement of switches or signals. 259, for circuit controllers actuated by the moving vehicle.

SEE OR SEARCH CLASS

200, Electricity: Circuit Makers and Breakers, appropriate subclasses, for the structure of the circuit closer or breaker.