US PATENT SUBCLASS 246 / 52
.~.~.~.~.~ Home and distant

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}
46  DF  .~.~.~.~ Line-wire distant control {5}
52.~.~.~.~.~ Home and distant

DEFINITION

Classification: 246/52

(under subclass 46) Systems in which two signals, "home" and "distant" so called, usually having a common support, are placed at the entrance to each block and respectively indicate the condition of the block about to be entered and or the next block ahead.

SEE OR SEARCH THIS CLASS, SUBCLASS:

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

33, 38, 39, 44+, 51, 224, and 481, for motors for actuating

home and distant signals.

39, 46+, 53 and 60, for line-wire systems of control.