Double drum level winding rope lift mechanism for luminaires on

Details Double drum level winding rope lift mechanism for luminaires on Double drum level winding rope lift mechanism for luminaires on

1988-06-29

1989-07-25

Husar, Stephen F.

Illumination

Supports

Support having gravity-type light source or light modifier...

362250, 362286, 362431, 254285, F21V 2136

Patent

active

048519804

ABSTRACT:
A winch having a pair of first and second cylindrical drums; a drive to simultaneously axially rotate the drum; a reciprocating bracket which travels substantially axially parallel to the drums when the drums rotate; the bracket having a pair of spaced apart first and second rope guides; the first guide being capable of receiving a rope being level wound on, or unwound from, the first drum; and the second guide being capable of receiving a rope being level wound on, or unwound from, the second drum.

REFERENCES:
patent: 539995 (1895-05-01), Nason
patent: 2968446 (1961-01-01), Selby
patent: 3801813 (1974-04-01), Kiehn
patent: 3980252 (1976-09-01), Tae
patent: 4012001 (1977-03-01), Knox
patent: 4429355 (1984-01-01), Garchinsky

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