(under subclass 246) Subject matter in which a circuit controller is supported by the trolley-wire or third rail and actuated mechanically by the current-collector.
SEE OR SEARCH THIS CLASS, SUBCLASS:
31, 72, 81, 84, 90, 91, 126, and 246+, for circuit-controllers actuated by the wheels or other devices, not trolleys, carried by the car.
SEE OR SEARCH CLASS
200, Electricity: Circuit Makers and Breakers, appropriate subclasses for the structure of switches, and particularly
52+, for circuit makers and breakers of special application.
