US PATENT SUBCLASS 246 / 35
.~.~.~.~ Propulsion-current return

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}
35.~.~.~.~ Propulsion-current return {1}
36  DF  .~.~.~.~.~> Double rail {1}

DEFINITION

Classification: 246/35

(under subclass 34) Systems in which super-imposed propulsion current, either direct or alternating, is returned through one of the traction rails which is not sectionalized.

SEE OR SEARCH THIS CLASS, SUBCLASS:

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

34, 38, 39, and 40, for alternating track-circuits showing one unbroken traction-rail, its use for return of propulsion-current not being specified.

42, 43 and 61, for the use of propulsion-current in other systems.