(under subclass 27) Systems in which the traffic- controlling devices are actuated and controlled only by electrical means.
(1) Note. The means employed upon the train for operating cab signal and train-control mechanism may by of any type--e.g., electrical, fluid-pressure, mechanical, etc.
SEE OR SEARCH THIS CLASS, SUBCLASS:
22, for semi-automatic block signaling systems in which electrical means are used for performing the automatic function.
114+, for automatic grade-crossing protection systems having electrical means for operating the protecting means.
SEE OR SEARCH CLASS
104, Railways, 238, for vehicle propulsion control by block system wherein a
peculiar type of guideway is claimed (e.g., cable, model, overhead, etc.).
