US PATENT SUBCLASS 246 / 89
.~.~.~.~ Short sectional rail closure

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}
89.~.~.~.~ Short sectional rail closure

DEFINITION

Classification: 246/89

(under subclass 87) Systems in which the circuit for actuating or controlling the signals is opened of closed by car-wheels bridging two short parallel insulated track-sections.

SEE OR SEARCH THIS CLASS, SUBCLASS:

129, for short-sectional-rail-closure systems.

SEE OR SEARCH CLASS

104, Railways,

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