Crossing or points for railway tracks has frogs which move with respect to tracks to provide smooth transfer running surface

摘要

The crossing or points (1) are for a railway track group which has preset junction angle between the tracks (2,3). The crossing has frogs (4-7) angularly movable with respect to the tracks. The frogs have areas (8,9) matching the running areas of the railway vehicle wheels. The frogs for each pair of rails can move simultaneously over a preset angle transversely to the rails.