US PATENT SUBCLASS 246 / 251
.~.~ Vertically sprung rail

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}
251.~.~ Vertically sprung rail

DEFINITION

Classification: 246/251

(under subclass 246) Subject matter in which a circuit controller is actuated by the vertical yielding of the rail under the weight of the passing train.