Movable point for a crossing frog for railway apparatus of very

Railway switches and signals – Switch-connected frogs – Swinging tongue

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246472, 246442, E01B 700

Patent

active

056180136

ABSTRACT:
A movable point for a crossing frog for railway apparatus of great length, incorporated in long welded rails. The point (7) is comprised of a single steel element, which comprises integral seating cross members (8). The rigidity of the point varies along all its length from a minimum adjacent a thin forward portion (9) to a maximum adjacent a wide rear portion (10). The point is constituted by a piece of austenitic manganese steel. The point can be of cast steel or can be formed by laminating and/or forging, followed by machining.

REFERENCES:
patent: 859101 (1907-07-01), Odenkirk et al.
patent: 3766770 (1973-10-01), Sato et al.
patent: 3787680 (1974-01-01), Perrot
patent: 4824055 (1989-04-01), Tuningley et al.
patent: 5082214 (1992-01-01), Testart
patent: 5336184 (1994-11-01), Testart et al.

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