US PATENT SUBCLASS 246 / 247
.~.~ Wheel or train counting

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}
247.~.~ Wheel or train counting

DEFINITION

Classification: 246/247

(under subclass 246) Subject matter provided with mechanism, usually of the step-by-step variety, by means of which as many trains or car-wheels as enter must leave the block before the signal is restored to safety.

SEE OR SEARCH THIS CLASS, SUBCLASS:

19, and 77+, for counting mechanism.