Emergency control system for elevators

Details Emergency control system for elevators Emergency control system for elevators

1986-04-10

1987-09-01

Shoop, Jr., William M.

Elevator, industrial lift truck, or stationary lift for vehicle

Stationary lift for roadway vehicle or required component...

Having specific drive means for support

G01P 1500

Patent

active

046902511

ABSTRACT:
An emergency control system for an elevator has a circuit for producing a signal in response to a relatively small vibration of a structure in which the elevator is installed; a first circuit responsive to the signal for controlling the operation of the elevator under a predetermined mode for a first predetermined time interval; and a second circuit for disabling the signal producing circuit simultaneously with the start of operation of the first circuit and enabling the signal producing circuit for a second predetermined time interval longer than the first predetermined time interval.

REFERENCES:
patent: 3792759 (1974-02-01), Kirsch
patent: 4382489 (1983-05-01), Susuki et al.

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