Elevator control

Details Elevator control Elevator control

1977-12-02

1980-05-20

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 136

Patent

active

042035066

ABSTRACT:
An apparatus for selecting a floor, and slowing down and leveling an elevator is described. At least one wire or rod extends vertically along the elevator shaft. The wire or rod is of a nonmagnetic material and has magnetic coatings thereon along selected segments of its length. A number of magnetic sensors are mounted to the elevator. A circuit responsive to the sensor outputs produces control signals dependent on the length of each segment of magnetic coating.

REFERENCES:
patent: 2598214 (1952-05-01), Borden
patent: 2792080 (1957-05-01), Dunlop
patent: 2840188 (1958-06-01), Savage
patent: 2938603 (1960-05-01), Loughridge
patent: 3223200 (1965-12-01), Lejeune
patent: 3407905 (1968-10-01), Gingrich
patent: 3765510 (1973-10-01), Richmon
patent: 4007811 (1977-02-01), Ozawa

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