US PATENT SUBCLASS 246 / 148
.~.~.~ Preliminary

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

131  DF  INTERLOCKING {8}
143  DF  .~ Manual actuation {3}
147  DF  .~.~ Mechanical locking {5}
148.~.~.~ Preliminary {1}
149  DF  .~.~.~.~> Tappets

DEFINITION

Classification: 246/148

(under subclass 147) Subject matter in which the actuation of the quandrant-latch or its equivalent completely actuates the locking mechanism before the lever can begin its movement.

SEE OR SEARCH THIS CLASS, SUBCLASS:

136, 139 and 140, for various types of interlocking.