US PATENT SUBCLASS 246 / 79
.~.~.~.~.~ Double opposed pawls

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

20  DF  BLOCK-SIGNAL SYSTEMS {4}
27  DF  .~ Automatic {5}
28 R  DF  .~.~ Electric {18}
77  DF  .~.~.~ Counting in and out {1}
78  DF  .~.~.~.~ Ratchet wheel {1}
79.~.~.~.~.~ Double opposed pawls {1}
80  DF  .~.~.~.~.~.~> Parallel teeth

DEFINITION

Classification: 246/79

(under subclass 78) Subject matter having a single ratchet-wheel which is actuated by two opposed pawls moving in the same plane and tending to turn it in opposite directions.

SEE OR SEARCH THIS CLASS, SUBCLASS:

19, 72, 77+, and 247, for details of the counting and canceling devices.