US PATENT SUBCLASS 246 / 250
.~.~ Single-direction actuation

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

218  DF  ELECTRIC ACTUATION {9}
246  DF  .~ Car-actuated circuit controllers {6}
250.~.~ Single-direction actuation

DEFINITION

Classification: 246/250

(under subclass 246) Subject matter in which a circuit controller is actuated by trains moving in one direction only.

SEE OR SEARCH THIS CLASS, SUBCLASS:

198, and 298, for devices actuated by cars moving in one direction only.