US PATENT SUBCLASS 246 / 31
.~.~.~ Propulsion-current 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}
31.~.~.~ Propulsion-current control {1}
32  DF  .~.~.~.~> Current consumption


DEFINITION

Classification: 246/31

(under subclass 28) Systems in which means not on the car or train are provided whereby under conditions of danger the supply of propulsion current is cut off or is so reduced that the car is stopped or its speed controlled. (1) Note. The control of the supply of propulsion current is most cases will be by other cars or trains which constitute a hazard to the controlled car or train.

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187, and the subclasses specified in the Notes thereto, for train-control devices located on the train whereby the motor of an electric car is deprived of propulsion current.

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104, Railways,

238, for vehicle propulsion control by block system wherein a peculiar type of guideway is claimed (e.g., cable, model, overhead, etc.).

191, Electricity: Transmission to Vehicles, 16, 21 for conductor-supply systems for railways wherein the conductor is provided with a plurality of sections, one or more of the sections being manually de-energized and the system having means for connecting the de-energized section to the supply feeder.