Elevator system

Elevator – industrial lift truck – or stationary lift for vehicle – Stationary lift for roadway vehicle or required component... – Having specific drive means for support

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Details

B66B 130

Patent

active

042781507

ABSTRACT:
A traction elevator system including an elevator car driven by a drive arrangement having electrically isolated high and low speed components. Fixed AC and controllable DC voltages are selectively applied to the high and low speed components, respectively, at predetermined portions of the run, to control the drive torque to provide smooth operation of the elevator car.

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patent: 4213517 (1980-07-01), Ando
patent: 4220221 (1980-09-01), Gingrich

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