US PATENT SUBCLASS 246 / 39
.~.~.~.~ Line-wire distant 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}
34 R  DF  .~.~.~ Varying-current track circuit {9}
39.~.~.~.~ Line-wire distant control

DEFINITION

Classification: 246/39

(under subclass 34) Systems in which one or more line-wires extending back for at least the entire length of the block are used for controlling or actuating the distant signal.

SEE OR SEARCH THIS CLASS, SUBCLASS:

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

46+, and 60, for line-wire control systems.

52, and 224, for the structure of or means for the actuation of the signals.

53, and 223, for three-position type of semaphore.

52, 224 and 481, for home and distant type.