Illumination – With static structure
Patent
1978-06-28
1980-11-18
Nelson, Peter A.
Illumination
With static structure
362299, 362328, 362339, 362367, F21S 102
Patent
active
042349125
ABSTRACT:
A luminaire for roadway lighting using a one-piece reflector developing at least two collimated beams in each longitudinal direction. The collimated beams impinge on sloping faces of a refractor to diverge the beams into a regular pattern covering the street with a sharp cutoff at predetermined longitudinal distances from the luminaire. The refractor employs a compressed parabola comprised of radial sections of comparatively large focal length with steps and risers. The complex shape of the one-piece reflector may readily be produced by a reflector finish applied to a molded plastic matrix. In the luminaire, the prismatic surfaces of the inclined walls of the refractor diverge the formerly collimated beams in a carefully controlled manner to produce very uniform distribution of light.
REFERENCES:
patent: 2748263 (1956-05-01), Franck et al.
patent: 3250913 (1966-05-01), Welty
patent: 3265883 (1966-08-01), Tolbert
patent: 3278743 (1966-10-01), Franck
patent: 3283140 (1966-11-01), Rex
patent: 3377477 (1968-04-01), Odle
patent: 3392277 (1968-07-01), Dawson
patent: 3433941 (1969-03-01), Hall
patent: 4041306 (1977-08-01), Compton et al.
patent: 4053766 (1977-10-01), Brass
patent: 4081667 (1978-03-01), Lewin
Barnes Jocelyn T.
Hard, III Chester A.
Loch Charles H.
Shelby Billy L.
Chaban Marvin M.
International Telephone and Telegraph Corporation
Nelson Peter A.
Raden James B.
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