Method and apparatus for haerten the heads or other wear surfaces of rails and the like by heating and subsequent cool down

摘要

110,253. Sandberg, C. P. Oct. 4, 1916. Pole collectors with collecting hooks.-In apparatus for heat-treating railway and tramway rails in situ comprising a car adapted to travel along the rails, an electric motor B on the car may be supplied with current from the overhead wires by a pole N and a flexible cable.