(under subclass 473) Subject matter having switch-position indicators such as signals, lamps, and targets actuated by the movement of a switch or switch-stand.
SEE OR SEARCH THIS CLASS, SUBCLASS:
212+, for detonating signals placed in position by the motion of a switch or switch-stand.
220, for electrically-actuated switch signals.
393+, for switch signals, targets, etc., actuated by the switch-stand.
