US PATENT SUBCLASS 246 / 288
.~.~.~.~ Counterweight


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}
284  DF  .~.~ Trailing setting {1}
285  DF  .~.~.~ Yielding rail {3}
288.~.~.~.~ Counterweight


DEFINITION

Classification: 246/288

(under subclass 285) Subject matter including mechanism whereby a switch-stand is held closed against ordinary manual force, but is capable of being automatically thrown and secured, against the action of a counter-weight, by the passage of the first wheel trailing through the switch.