US PATENT SUBCLASS 246 / 78
.~.~.~.~ Ratchet wheel

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.~.~.~.~ Ratchet wheel {1}
79  DF  .~.~.~.~.~> Double opposed pawls {1}

DEFINITION

Classification: 246/78

(under subclass 77) Subject matter having ratchet-wheels which are actuated and controlled by pawls or escapements.

SEE OR SEARCH THIS CLASS, SUBCLASS:

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