Elevator leveling adjustment

Details Elevator leveling adjustment Elevator leveling adjustment

1996-02-29

1997-10-14

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

187283, 187394, B66B 140, B66B 134

Patent

active

056775199

ABSTRACT:
A method of adjusting a leveling time of an elevator car is disclosed. The method includes the steps of: moving the elevator car in a hoistway; transmitting a first signal by a first sensor in response to moving the elevator car in the hoistway; beginning a time measurement in response to detecting the first signal; transmitting a second signal by a second sensor in response to moving the elevator car in the hoistway, the second sensor being disposed a predetermined distance from the first sensor; ending the time measurement in response to detecting the second signal; determining a time measurement value in response to ending the time measurement; determining a leveling speed of the elevator car by dividing the predetermined distance between the first sensor and the second sensor by the time measurement value; and adjusting the leveling time in response to determining the leveling speed.

REFERENCES:
patent: 4427095 (1984-01-01), Payne et al.
patent: 4499974 (1985-02-01), Nguyen et al.
patent: 4750592 (1988-06-01), Watt
patent: 4798267 (1989-01-01), Forster et al.
patent: 4991693 (1991-02-01), Stern et al.

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