Railway switches and signals – Switch-connected frogs – Swinging tongue
Patent
1990-10-31
1992-01-21
Werner, Frank E.
Railway switches and signals
Switch-connected frogs
Swinging tongue
246468, 246472, E01B 710, E01B 714
Patent
active
050822144
ABSTRACT:
A crossing frog with moving point (1) for very long railway switches incorporated in long welded rails, comprises a cradle (2) in two elements (3 and 4), one molded and the other not molded. One element (3) is of molded steel, of which at least the two ends (3A and 3B) on the point side and the two ends (3C and 3D) on the heel side are shaped as a rail profile. However, only the rail profile of the two ends (3A and 3B) effectively serves for rolling, the non-molded element (4) being mainly made up of parts (5 and 5') produced integrally as rails and connected to the two ends (3C and 3D) on the heel side of the molded part (3). Neither the rail profile of the two ends (3C and 3D) nor the rail profile of the parts (5 and 5') effectively serves as rolling surface, the moving point (1), for its part, being produced integrally as rails of which all the upper faces effectively serve as rolling surface.
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"The Very Small Angle Points and Crossings on the High Speed Line From Paris to Lyon", Rail International, vol. 14, No. 1, Jan. 1983, by J. conomos, pp. 18-25.
Cogifer (Cie Generale d'Installations Ferroviaires), S.A.
Lowe Scott L.
Werner Frank E.
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