Illumination – Light source and modifier – Including reflector
Patent
1976-10-28
1978-06-20
Pendegrass, Verlin R.
Illumination
Light source and modifier
Including reflector
362296, 362342, F21V 1304
Patent
active
040965554
ABSTRACT:
In a lighting fixture, glare-free uniform illumination is achieved by means of a plurality of nested generally frusto-conical reflectors surrounding the light source of the fixture. The reflectors are shaped and positioned relative to one another and to the light source to concentrate light in the range of 65 to 71 degrees from downward vertical and to cause the intensity of the light to progressively decrease as the angle from downward vertical decreases from 65 degrees toward zero. The projected light from the fixture is concentrated in the 65 to 71 degree range from downward vertical in part by light radiated from the source at near horizontal and higher angles being doubly reflected between the frusto-conical reflectors and then projected in the high angle range. The reflectors are positioned relative to one another, to the light source and to baffles, to cut off any light from being projected at an angle from downward vertical greater than 75 degrees. The frusto-conical reflectors are mounted on three vertically extending rods surrounding the light source to provide an inexpensive reflector assembly construction.
REFERENCES:
patent: 2185694 (1940-01-01), Noe
patent: 2198014 (1940-04-01), Ott
patent: 2899543 (1959-08-01), Rasmussen
patent: 3115310 (1963-12-01), Hofman
patent: 3593014 (1971-07-01), Vesely
patent: 3836767 (1974-09-01), Lasker
patent: 4001575 (1977-01-01), Sullivan
patent: 4007365 (1977-02-01), Stempfle
Pendegrass Verlin R.
Walsh Donald P.
Wylain, Inc.
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