Elevator system

Details Elevator system Elevator system

1975-11-03

1978-04-25

Schaefer, Robert K.

Elevator, industrial lift truck, or stationary lift for vehicle

Stationary lift for roadway vehicle or required component...

Having specific drive means for support

B66B 502

Patent

active

040858235

ABSTRACT:
An elevator system including an elevator car and counterweight mounted for movement in a structure by a traction drive arrangement which includes a drive sheave and a drive motor. A first tachometer provides signals responsive to the drive motor and a second tachometer provides signals responsive to movement of the elevator car. The signals from the first and second tachometers are used in both functional and monitoring circuits to control the operation of the elevator system in a highly efficient self-checking manner.

REFERENCES:
patent: 3584706 (1971-06-01), Hall et al.
patent: 3741348 (1973-06-01), Caputo
patent: 3785463 (1974-01-01), Kuhl et al.
patent: 3961688 (1976-06-01), Maynard

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