Electrical transmission or interconnection systems – Plural supply circuits or sources – Substitute or emergency source
Patent
1985-11-01
1987-02-17
Shoop, Jr., William M.
Electrical transmission or interconnection systems
Plural supply circuits or sources
Substitute or emergency source
307 9, 307 10R, 307 64, 361 31, 361189, 188163, 188156, 188157, H02J 700, F16D 6536
Patent
active
046441808
ABSTRACT:
Electrical circuit configurations are described for the operation of an electrically powered actuator in an emergency to drive the actuator to a predetermined position. In particular the actuator is connected to apply friction brakes of a railway vehicle. The configurations have in common are emergency power circuit connected between an emergency power source and the actuator, means for breaking the power circuit when the actuator reaches the emergency position and latching means to prevent run-back. Preferably and in order to minimize size and weight the emergency power source is of limited capacity, sufficient for, say, two such emergency applications and is recharged from a normal power supply; the recharging circuit being interlocked with the latching means such that the actuator may not be released from the emergency position unless the power source has sufficient charge for at least one further emergency operation.
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Ip Shik Luen Paul
Shoop Jr. William M.
Westinghouse Brake and Signal Company Ltd.
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