Illumination – Light source and modifier – Adjustable or repositionable modifier
Patent
1989-12-12
1991-02-19
Ostrager, Allen M.
Illumination
Light source and modifier
Adjustable or repositionable modifier
362294, 362410, F25V 2900
Patent
active
049949462
ABSTRACT:
A lighting device includes a hollow body having a cylindrical portion and a closure portion, a light source being mounted within the body longitudinally inwardly of an open end of the cylindrical portion and located above the inclined surface of the closure portion. A reflector is movably mounted in a position spaced from the open end of the cylindrical portion and generally aligned with the longitudinal axis of the cylindrical portion such that the light radiated from the light source means passes to the reflector to be reflected by the reflector. Ventilation openings are provided in the inclined surface of the closure portion for admitting a flow of ambient air into the body below the light source, the light source heating the air admitted into the body such that the heated air flows generally longitudinally in the body to exit upwardly from the open end of the cylindrical portion as further ambient air is drawn into the body below the light source through the ventilation openings, whereby the lighting device is cooled by the flow of air upwardly through said body.
REFERENCES:
patent: 1181348 (1916-05-01), Schwartz
patent: 2744192 (1956-05-01), Rosenthal
patent: 3162367 (1964-12-01), Nowack
patent: 3275823 (1966-09-01), Zimmerman et al.
patent: 4337506 (1982-06-01), Terada
patent: 4344112 (1982-08-01), Brown
patent: 4388678 (1983-06-01), Turner
patent: 4686611 (1987-08-01), Von Kohorn
patent: 4819143 (1989-04-01), Teichmann
Cole: Richard
Ostrager Allen M.
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