Ski lift with variable speed linear motor drive and emergency st

Details Ski lift with variable speed linear motor drive and emergency st Ski lift with variable speed linear motor drive and emergency st

1990-12-28

1992-10-27

Oberleitner, Robert J.

Railways

Car-carried propulsion system

Electric

104 93, B60L 1302

Patent

active

051580217

ABSTRACT:
A ski chair lift with variable speed drive for each chair. A linear motor is used in lieu of the conventional closed loop tow cable. The stator of the linear motor includes a closed loop I-beam guide rail, electromagnets secured to the top flange of the I-beam, and permanent magnets secured to chair lift carriers which are driven by selective energization of the electromagnets. Failsafe stops and brakes delimit movement of the chairs on the guide rail in the event of a power failure.

REFERENCES:
patent: 3792665 (1974-02-01), Nelson
patent: 3937147 (1976-02-01), Szent-Miklosy
patent: 4284010 (1981-08-01), Marshall
patent: 4819564 (1989-04-01), Brandis et al.
patent: 4922830 (1990-05-01), Fujita et al.
patent: 4931677 (1990-06-01), Heidelberg et al.

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