Illumination – Light source and modifier – Including reflector
Patent
1981-04-09
1983-10-04
Nelson, Peter A.
Illumination
Light source and modifier
Including reflector
362 62, 362346, 362195, 362350, 362308, 362362, 362310, 362328, 362329, 362344, F21V 708
Patent
active
044082665
ABSTRACT:
This invention relates to a threshold and approach semi-flush light of the type which utilizes a high intensity lamp surrounded by a reflector which concentrates the light emitting from the lamp on a mirror located above the lamp. The mirror reflects the light through a prism in a predetermined pattern. The reflector comprises a pair of ellipsoidal surfaces of differing eccentricities joined together to form a composite reflector, such that the ellipsoidal section nearest the lamp filament has an eccentricity greater than the second ellipsoidal section spaced a greater distance away from the lamp filament.
REFERENCES:
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patent: 3369112 (1968-02-01), Loch
patent: 3586849 (1971-06-01), Starkweather
patent: 3678260 (1972-07-01), Beal
patent: 3697736 (1972-10-01), Frederiksen
patent: 4161770 (1979-07-01), Maurer
patent: 4180850 (1979-12-01), Bivens
patent: 4218727 (1980-08-01), Shemitz et al.
patent: 4295186 (1981-10-01), Sugiura et al.
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