US PATENT SUBCLASS 246 / 355
.~.~.~.~.~.~ Double

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

270 R  DF  VEHICLE-ENERGY ACTUATION {11}
314  DF  .~ Switches, automatic {6}
322  DF  .~.~ Track mechanism {13}
344  DF  .~.~.~ Transverse motion {4}
351  DF  .~.~.~.~ Vertical motion {3}
353  DF  .~.~.~.~.~ Swinging {2}
355.~.~.~.~.~.~ Double

DEFINITION

Classification: 246/355

(under subclass 353) Subject matter having pairs of track devices each moving the switch in a direction opposite from the other.

(1) Note. Both devices of the pair must be located either in front of or behind the switch, for when placed in tandem, with the switch between them, they are not double, but become independent means for switch setting and resetting, respectively.

SEE OR SEARCH THIS CLASS, SUBCLASS:

340, 343, 349, and 356+, for double trips.