US PATENT SUBCLASS 246 / 422
.~.~ Moving guard rail

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}
422.~.~ Moving guard rail

DEFINITION

Classification: 246/422

(under subclass 420) Subject matter having a switch provided with fixed points and moving guard-rails, the function of the latter being to direct the wheels to the proper track.