Apparatus for controlling elevator at occurrence of earthquake

Details Apparatus for controlling elevator at occurrence of earthquake Apparatus for controlling elevator at occurrence of earthquake

1987-03-25

1989-03-07

Smith, Jerry

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

048098175

ABSTRACT:
A controller for deciding the safety of continued elevator operation during and following an earthquake based on a comparison of currently detected seismic intensity data with stored historic intensity data. In the event the current intensities are greater than all stored data or equal to an occurrence in which faults were detected, operation is suspended at the nearest floor until a fault detection is completed. New seismic data is automatically stored along with the presence or absence of fault conditions.

REFERENCES:
patent: 3792759 (1974-02-01), Kirsch
patent: 4382489 (1983-05-01), Sizuki
patent: 4649751 (1987-03-01), Onoda
patent: 4653611 (1987-03-01), Ohta et al.
patent: 4690251 (1987-09-01), Onoda
Suzuki, "Earthquake-Emergency Landing Device with a Primary-Wave Sensor for Elevators", Mitsubishi Electric, 3/81, pp. 10-11.

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