Cost effective control of the main switches of an elevator drive

Details Cost effective control of the main switches of an elevator drive Cost effective control of the main switches of an elevator drive

1994-01-31

1996-08-27

Nappi, Robert

Elevator, industrial lift truck, or stationary lift for vehicle

Having specific load support drive-means or its control

Includes control for power source of drive-means

187287, 187391, B66B 106

Patent

active

055491790

ABSTRACT:
The main disconnects for energizing a drive motor for an elevator may be controlled by a circuit having a safety chain, an inspection device, a circuit board and a coil for the main disconnect wherein the safety chain provides a safe condition signal to the inspection device which in turn provides a plurality of mode signals to the circuit board which evaluates the mode signals in order to provide a circuit breaker control signal to the circuit breaker coil. In turn, the circuit breaker coil either opens or closes the main disconnect.

REFERENCES:
patent: 4367810 (1983-01-01), Doane et al.
patent: 4898263 (1990-02-01), Manske et al.
patent: 5392879 (1995-02-01), Boyce et al.

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