US PATENT SUBCLASS 246 / 114 A
.~.~.~ Cross-over protection

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

111  DF  GRADE-CROSSING TRACK PROTECTION {3}
113  DF  .~ Automatic {2}
114 R  DF  .~.~ Electric {2}
114 A.~.~.~ Cross-over protection

Unofficial Alpha Subclasses: R A

DEFINITION

Classification: 246/114

(under subclass 113) Subject matter having electric means for the actuation or control of the traffic-controlling devices.

SEE OR SEARCH THIS CLASS, SUBCLASS:

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