Spring rail frog having switchable magnet for holding wing rail open
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United States of America Patent
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Sep 15, 1998
Issued Date -
N/A
app pub date -
Dec 1, 1997
filing date -
Sep 26, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A railroad frog assembly is provided with a switched magnet that immediately retains a frog flexible wing rail in its open position in response to a railcar wheel passing through the frog assembly, and that delayably releases the frog flexible wing rail from its open position for subsequent closure by an included frog compression spring.
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