Elevator – industrial lift truck – or stationary lift for vehicle – Stationary lift for roadway vehicle or required component... – Having specific drive means for support
Patent
1979-05-22
1981-07-14
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
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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Boomgaard Dirk J.
Lund, deceased Alvin O.
Wehrli, III Henry A.
Duncanson Jr. W. E.
Lackey D. R.
Truhe J. V.
Westinghouse Electric Corp.
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