US PATENT SUBCLASS 246 / 18
.~.~ Double semaphore

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

2 R  DF  TRAIN DISPATCHING {7}
14  DF  .~ Station, block, or train-order signals {3}
18.~.~ Double semaphore

DEFINITION

Classification: 246/18

(under subclass 14) Signals having two semaphore-arms which extend on opposite sides from a common support.

SEE OR SEARCH THIS CLASS, SUBCLASS:

479+, for semaphore structure.