US PATENT SUBCLASS 246 / 91
.~.~.~.~.~ Relay

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}
87  DF  .~.~.~ Line-current supply {4}
90  DF  .~.~.~.~ Car-actuated controller {1}
91.~.~.~.~.~ Relay

DEFINITION

Classification: 246/91

(under subclass 90) Systems in which the car-actuated controllers governs the action of one or more controllers of other circuits, which perform the function of a relay.