(under subclass 27) Subject matter having electrical and fluid-pressure means used in combination for the actuation and control of roadway-signals, track-detents, contacts, and similar devices, irrespective of the means employed upon the train for actuating the cab and control mechanism.
SEE OR SEARCH THIS CLASS, SUBCLASS:
140+, for interlocking mechanism actuated by electric fluid-pressure means.
257+, and the subclasses mentioned in the search notes appended thereto, for fluid-pressure-motor structure.
258, and 259, for electric fluid-pressure motors for actuating switches and signals generally.
