Railroad yard switch machine

Details Railroad yard switch machine Railroad yard switch machine

2007-09-11

2007-09-11

Le, Mark T. (Department: 3617)

Railway switches and signals

Switch stands

Structural types

C246S411000, C246S262000, C246S406000, C246S407000, C246S393000

Reexamination Certificate

active

11047202

ABSTRACT:
A railroad switch machine which is normally operated by an electric motor but which may be manually operated without causing rotation of the power shaft of the electric motor to enable the switch machine to move the switch points without having to overcome the brake resistance applied to the power shaft by the brake and gearbox thereof.

REFERENCES:
patent: 2385799 (1945-10-01), Dodge
patent: 2744598 (1956-05-01), Troendly
patent: 3418462 (1968-12-01), Wilson et al.
patent: 3449562 (1969-06-01), Willson
patent: 3621237 (1971-11-01), Hylen
patent: 3691371 (1972-09-01), Hylen
patent: 3937310 (1976-02-01), Oldfield
patent: 4824054 (1989-04-01), Kohake et al.
patent: 5014937 (1991-05-01), Peters
patent: 5531408 (1996-07-01), Wechselberger
patent: 6164601 (2000-12-01), Scheer et al.
patent: 6732843 (2004-05-01), Miura et al.

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