Railway switches and signals – Crossings – frogs – and mates – Frogs
Patent
1994-05-03
1995-02-28
Le, Mark T.
Railway switches and signals
Crossings, frogs, and mates
Frogs
246460, 246463, 246470, E01B 700
Patent
active
053930193
ABSTRACT:
An improved railroad turnout frog with a continuous running surface is provided. The frog provides for continuous running of the rolling stock and includes a mobile point with a triangular shape. The mobile point is located in a portion of the frog which would be void and otherwise provide no structural support.
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Railway Track & Structures, Dec. 1990, pp. 11-13.
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Railway Track & Structures, Apr. 1993, pp. 24-28.
Railway Track & Structures, Jul. 1993, pp. 19-22.
Railway Track & Structure Track Buyer's, 1993, pp. 22-25.
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