Railway Switches And Signals

Abstract

Signals, including those used for communication between occupants of a car or train.Indicators, recorders, telegraphic, telephonic, or other similar apparatus when especially designed for use in connection with car or train movements, except manually-set devices, such as train and engine signs and markers capable of general use.

Devices on the roadway, such as signals, switches, circuit closures, gates, etc., actuated or controlled from or by the moving vehicles, except circuit-controllers actuated by the vehicle for the purpose of energizing sectionalized conductors used for supplying propulsion-current thereto.

Automatic train stop and speed control means, the actuation of which is initiated by agencies not on the train or by wheel derailment or defects in train structure and mechanism, the automatic stop, for classification purposes, being considered an equivalent of and substitute for a railway signal; but train stopping and control mechanism cooperating with obstacles fixed in position upon the track which have no moving parts are excluded from this class except when they cooperate with speed-responsive devices on the train.

Safety devices, including derailing switches and blocks, used for preventing accidents caused by the misplacement of switches, disregard of signals etc.The structure of signals, switches, frogs, and crossings and their appurtenances.Mechanism for the manual or other actuation of any of the devices of the class.