US PATENT SUBCLASS 246 / 92
.~.~.~.~ Intermittent contact

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}
87  DF  .~.~.~ Line-current supply {4}
92.~.~.~.~ Intermittent contact

DEFINITION

Classification: 246/92

(under subclass 87) Systems in which the circuit is closed by devices carried by the train, which make electrical connection with short rails, contact-plates, etc.

SEE OR SEARCH THIS CLASS, SUBCLASS:

49, 56, 69, 70, 71, 74, 85, 195, 229, 233, 234, 235, and 254, for intermittent- contact systems.

SEE OR SEARCH CLASS

104, Railways,

279+, for devices for cleaning ice, snow and dirt from continuous and intermittent electrical contacts.