US PATENT SUBCLASS 246 / 137
.~.~.~ Return-release indication

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

131  DF  INTERLOCKING {8}
132  DF  .~ Electric actuation {2}
136  DF  .~.~ Mechanical locking {1}
137.~.~.~ Return-release indication {1}
138  DF  .~.~.~.~> Locked slide

DEFINITION

Classification: 246/137

(under subclass 136) Subject matter in which the actuating lever or device is prevented by electric locks from completing its movement, and from thereby unlocking the other devices which it controls, until the actuated unit is in full normal or reverse position, whereupon a return-release-indication current is sent back, unlocking the actuating-lever and permitting or effecting the completion of its movement.

SEE OR SEARCH THIS CLASS, SUBCLASS:

135, 138, 141, and 142, for return-release-indication.

222, for return-indication-current generation.