US PATENT SUBCLASS 246 / 414
.~.~.~.~ Automatic key-lock

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  DF  .~.~.~ Drop arm {1}
414.~.~.~.~ Automatic key-lock

DEFINITION

Classification: 246/414

(under subclass 413) Subject matter having an automatic spring key-lock built into the body of the stand or lever.

SEE OR SEARCH THIS CLASS, SUBCLASS:

400, for key-retaining switch stands.

SEE OR SEARCH CLASS

70, Locks, appropriate subclasses, particularly 193-197 for locks and lever guide locks.