Illumination – Light source and modifier – Laser type
Patent
1990-01-18
1991-04-30
Husar, Stephen F.
Illumination
Light source and modifier
Laser type
362386, 362401, 362403, F21V 2114
Patent
active
050123980
ABSTRACT:
A leveling device for leveling the orientation of a suspended light bar, beam, or cross-arm to which is mounted one or more light fixtures includes a bracket secured to the light bar and having an outwardly extending end. An adjustment cable is attached at opposite ends to the light bar and the outwardly extended end of the bracket, and passes through a pulley which is attached to the end of a suspension cable, which suspends the light bar and light fixtures from an elevated structure. An actuator member is attached between the pulley and the extended end of the bracket. Lengthening or retracting of the actuator member causes relational movement of the extended end of the bracket with respect to the pulley which in turn allows the adjustment cable to move through the pulley to shift the suspended support member and vertically align the suspension cable with the center of gravity of the suspended light bar to maintain the light bar in a level position counteracting leveling force against any opposite rotational movement of the light bar.
REFERENCES:
patent: 2609170 (1952-09-01), Farrington et al.
patent: 3514586 (1970-05-01), Kuebler
patent: 4358817 (1982-11-01), Bielemeier
patent: 4450507 (1984-05-01), Gordin
Demeyer David M.
Jones Robert D.
Husar Stephen F.
Musco Corp.
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