Heater for railway points

摘要

The railway point heater has a stock rail with a sliding seat for the switch rail extending along its foot and a rod-like heating element lies on the foot or web of the stock rail. This element lies in the region of the sliding seat displaced?? from the foot and web, and on the foot side on the seat. The element is pre-tensioned for intimate contact at the sliding seat in its direction. The section of the heating element is displaced from the stock rail foot or web has an S- or zigzag- shape. The heating element is fed by a voltage according to heating demand and is controllable in its heat output.