US PATENT SUBCLASS 246 / 55
.~.~.~.~.~ Cab signal or train control

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}
28 R  DF  .~.~ Electric {18}
41  DF  .~.~.~ Direct current, normally closed, track circuit {4}
54  DF  .~.~.~.~ Single block {1}
55.~.~.~.~.~ Cab signal or train control {2}
56  DF  .~.~.~.~.~.~> Intermittent contact
57  DF  .~.~.~.~.~.~> Bridged insulated rail joint

DEFINITION

Classification: 246/55

(under subclass 54) Systems in which the traffic-controlling devices are placed upon the car or train.

SEE OR SEARCH THIS CLASS, SUBCLASS:

26, 34+, 41+, 58+, 95, 98, 128+, and 130, for track-circuit systems.

40, for single-block systems.

167+, and all subclasses referred to in the search notes appended thereto, for details of the cab and control mechanism.