US PATENT SUBCLASS 246 / 413
.~.~.~ Drop arm

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

393  DF  SWITCH STANDS {8}
407  DF  .~ Structural types {4}
412  DF  .~.~ Horizontal lever {1}
413.~.~.~ Drop arm {1}
414  DF  .~.~.~.~> Automatic key-lock

DEFINITION

Classification: 246/413

(under subclass 412) Subject matter having a switch stand which has a pivoted arm, which drops into a notch in the locking-segment, forming an automatic lock.

SEE OR SEARCH THIS CLASS, SUBCLASS:

144+, for signal-actuating interlocking switch stand.

314, for vehicle-actuated switches.