US PATENT SUBCLASS 246 / 129
.~.~ Short sectional rail closure

Current as of: June, 1999
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246 /   HD   RAILWAY SWITCHES AND SIGNALS

125  DF  ELECTRIC AUTOMATIC HIGHWAY SIGNALS, MINE DOORS, AND GATES {3}
128  DF  .~ Normally open track circuit {1}
129.~.~ Short sectional rail closure

DEFINITION

Classification: 246/129

(under subclass 128) Subject matter where an open circuit is closed by the car-wheels bridging two short parallel

insulated sections of the traction-rails.

SEE OR SEARCH THIS CLASS, SUBCLASS:

89, for systems using short sectional rail-closures.

111, 125, 260, 293, and 473, and appropriate indented subclasses, for signal structure.