(under subclass 96) Subject matter having means provided for actuating audible or visible signals upon the car or train or for stopping it or controlling its speed.
SEE OR SEARCH THIS CLASS, SUBCLASS:
96, 98, 99, and 263, for electromechanical systems.
102, 103 and 262, for mechanical-motor systems.
167+, and subclasses specified in the notes thereto for cab and control features.