GB189921656A - Improvements in Controlling Electric Motors and Electrically Propelled Railway Trains. - Google Patents

Abstract

21,656. British Thomson-Houston Co., [Sperry, E. A.]. Oct. 30. Drawings to Specification. Brakes ; propelling.-Relates to a controlling-system for a number of motors carried on separate vehicles, which are adapted to be mechanically connected together to form a train. A master controller is fitted on each vehicle, and all the motors can be controlled from one point. The handles and electrical connections may be so arranged that the angular position of the controlling- handle represents also the angular position of the motor controller cylinder which follows step-bystep the movement of the handle. The motor controller, so as to be independent of external source, is operated by a spring pilot motor consisting of a spiral spring so arranged that it tends to unwind at both ends. A small electric motor is provided to wind up automatically the spring the expansion of which controls the starting-switch of this motor. The direction of motion is determined by a governing-device mounted in a frame and comprising a pair of electromagnets with an oscillating polarized armature, a solenoid, and interlocking and escape gear. The connections are preferably so arranged that movement in one direction completes a power circuit, and in the other brake circuits, the brakes being operated by the current produced by the motors running as generators. A storage battery supplies the current for the controllers so that they may be operated when the main supply is cut off.