US PATENT SUBCLASS 246 / 100
.~.~ Fluid pressure


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

20  DF  BLOCK-SIGNAL SYSTEMS {4}
27  DF  .~ Automatic {5}
100.~.~ Fluid pressure {1}
101  DF  .~.~.~> Cab signal or train control


DEFINITION

Classification: 246/100

(under subclass 27) Subject matter having fluid-pressure means used for actuating and controlling roadway-signals, detents, and other track devices, irrespective of the means employed upon the train for actuating the cab and control mechanism.

SEE OR SEARCH THIS CLASS, SUBCLASS:

93+, 116, 139, 142, 257+, and 361, for fluid-pressure actuation of signals.

140, 141, 258, and 259, for electrically-controlled, for fluid pressure actuation of signals.

257, see search notes appended thereto, for fluid-pressure structure.