Device for grounding an elevator winder

Details Device for grounding an elevator winder Device for grounding an elevator winder

1979-07-09

1981-10-06

Spar, Robert J.

Electricity: electrical systems and devices

Discharging or preventing accumulation of electric charge

187 1R, 307145, H02H 100

Patent

active

042938899

ABSTRACT:
A device for grounding an elevator winder including an electric motor controlled by a semiconductor switching element and a first rotary element coupled to the electric motor. A main rope is wound on the first rotary element and bearings are adapted to support the electric motor and first rotary element. A first grounding circuit grounds the bearings through a resistor and a second grounding circuit grounds the main rope without using a resistor. The main rope may also be wound around a second rotary element.

REFERENCES:
patent: 1490271 (1924-04-01), Hecht, Jr.
patent: 2125050 (1938-07-01), Josephs, Jr. et al.
patent: 3317759 (1967-05-01), Grobel
patent: 3873886 (1975-03-01), Kato et al.
patent: 4059846 (1977-11-01), Eisenhauer

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