US PATENT SUBCLASS 246 / 421
.~.~ Risers

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

415 R  DF  SWITCHES {21}
420  DF  .~ Nonderailing, trailing {2}
421.~.~ Risers

DEFINITION

Classification: 246/421

(under subclass 420) Subject matter having a switch provided with one or more devices, called "risers", upon which the wheels are carried over the top of the stock-rail and are guided into position by the action of the guard rail or grooves.

SEE OR SEARCH THIS CLASS, SUBCLASS:

432, 455 and 469, for switch and crossing risers.