Elevator control and indicator device

Details Elevator control and indicator device Elevator control and indicator device

1989-02-17

1990-08-28

Pellinen, A. D.

Elevator, industrial lift truck, or stationary lift for vehicle

Stationary lift for roadway vehicle or required component...

Having specific drive means for support

B66B 300

Patent

active

049517872

ABSTRACT:
An elevator control and indicator device comprises an assembly incorporating a circuit for mounting on a panel. The control circuit is connected to a piezoelectric element for generating an elevator control pulse in response to an output signal from the element. The circuit further comprises transient voltage suppression diodes shunted across the piezoelectric element and the transistor output. The device also can be configured to provide an indication of the position of an elevator car.

REFERENCES:
patent: 2525768 (1950-10-01), Bruns
patent: 2525769 (1950-10-01), Bruns
patent: 2738489 (1956-03-01), Borden
patent: 3777093 (1973-12-01), Sterns et al.
patent: 3952837 (1976-04-01), Rice
patent: 3989964 (1976-11-01), Gikow et al.
patent: 4120381 (1978-10-01), Otto et al.
patent: 4134107 (1979-01-01), Miller et al.
patent: 4683989 (1987-08-01), Pillage et al.
patent: 4776432 (1988-10-01), Magee

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