(under subclass 167) Subject matter having speed-control means which is inoperative below but operative above predetermined speeds when predetermined points are reached.
SEE OR SEARCH THIS CLASS, SUBCLASS:
167, and all subclasses mentioned in the search notes appended thereto, for cab and control features.
206, for structure of fixed track-trips.
SEE OR SEARCH CLASS
73, Measuring and Testing, 488+, for a speed-responsive device, per se.
