Column vibration system for a linear motor driven elevator

Details Column vibration system for a linear motor driven elevator Column vibration system for a linear motor driven elevator

1990-02-26

1991-08-06

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 1324

Patent

active

050369555

ABSTRACT:
A column vibration detection system for a linear motor driven elevator system comprises a vibration sensor installed on a column portion of a linear motor for detecting vibrations caused by seismic activity in the column portion propagated through the column portion, a first means for comparing an output signal derived from the vibration sensor with an earthquake occurrence determination signal, and a second means for controlling the linear motor of the elevator system on a basis of the occurrence or output of the first means.

REFERENCES:
patent: 3792759 (1974-02-01), Kirsch
patent: 4011928 (1977-03-01), Spear et al.
patent: 4402386 (1983-09-01), Ficheux et al.
patent: 4809817 (1989-03-01), Kawai

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