(under subclass 167) Systems in which the engineer or motorman can pass the track device without receiving the signal or having his train stopped or its speed reduced, by manually preventing the train mechanism from cooperating with the track device.
SEE OR SEARCH THIS CLASS, SUBCLASS:
107, for recording devices in block-signaling systems.
167, and all subclasses mentioned in the search notes appended thereto, for cab and control features.
