Elevator system with detector for indicating relative positions

Details Elevator system with detector for indicating relative positions Elevator system with detector for indicating relative positions

1977-04-08

1978-06-27

Stoner, Jr., Bruce H.

Elevator, industrial lift truck, or stationary lift for vehicle

Stationary lift for roadway vehicle or required component...

Having specific drive means for support

187 1R, B66B 130, B66B 150

Patent

active

040969258

ABSTRACT:
An elevator system including an elevator car and counterweight mounted for guided vertical movement in the hoistway of a building. A magnetically operated detector mounted on the elevator car cooperates with a magnetic shield disposed in the hoistway to noiselessly provide signals which indicate when the elevator car and counterweight are in a predetermined collision zone where collision is possible should the counterweight deviate from its normal travel path. The detector also provides signals when the elevator car and counterweight are outside the collision zone, which signals indicate the relative positions of the elevator car and counterweight.

REFERENCES:
patent: 3741348 (1973-06-01), Caputo
patent: 3783978 (1974-01-01), Hamilton
patent: 3791490 (1974-02-01), Smith
patent: 3792759 (1974-02-01), Kirsch
patent: 3815710 (1974-06-01), Shrum
patent: 3889231 (1975-06-01), Tosato et al.
patent: 3896906 (1975-07-01), Shrum
patent: 3945470 (1976-03-01), Minns
patent: 4011928 (1977-03-01), Spear et al.

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