US PATENT SUBCLASS 246 / 291
.~.~.~ Spring actuated

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

270 R  DF  VEHICLE-ENERGY ACTUATION {11}
*  DD  .~ Switch stands, automatic {3}
290  DF  .~.~ Trailing fly-back {1}
291.~.~.~ Spring actuated

DEFINITION

Classification: 246/291

(under subclass 290) Subject matter provided with means for allowing the switch-rails to spring apart and fly back against the compression or distention of a spring located in the stand upon the passage of each trailing wheel through the switch.