Elevator system

Details Elevator system Elevator system

1980-11-25

1983-02-15

Truhe, J. V.

Elevator, industrial lift truck, or stationary lift for vehicle

Stationary lift for roadway vehicle or required component...

Having specific drive means for support

B66B 130

Patent

active

043736122

ABSTRACT:
An elevator system including an elevator car, and control apparatus for controlling its speed, including a floor selector and a speed pattern generator. The speed pattern generator provides a running speed pattern, and a slowdown speed pattern. A smooth transfer from the running speed pattern to the slowdown speed pattern is achieved by the generation of first and second deceleration signals, and a transfer signal. When the floor selector issues a slowdown signal, the slowdown speed pattern is initiated and the first deceleration signal causes the running speed pattern to have a zero rate of change. First and second different relationships between the running speed pattern and the slowdown speed pattern then successively cause the issuance of the second deceleration signal and the transfer signal, with the second deceleration signal causing the running speed pattern to have a predetermined constant rate of change, less than that of the slowdown speed pattern, such that the patterns intersect. Pattern equality causes the issuance of the transfer signal, which initiates the substitution of the slowdown speed pattern for the running speed pattern.

REFERENCES:
patent: 3774729 (1973-11-01), Winkler
patent: 4131183 (1978-12-01), Krauer
patent: 4136758 (1979-01-01), Tachino
patent: 4155426 (1979-05-01), Booker, Jr.
patent: 4261439 (1981-04-01), Husson

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