US PATENT SUBCLASS 246 / 481
.~.~ Home and distant

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

473 R  DF  SIGNALS {12}
479  DF  .~ Semaphore {5}
481.~.~ Home and distant

DEFINITION

Classification: 246/481

(under subclass 479) Double semaphores on the same mast, usually operated by one lever in succession.

SEE OR SEARCH THIS CLASS, SUBCLASS:

33, 38, 39, 44+, 51, and 52, for semaphores in block-signal stems.

224, for home and distant signal semaphores.