Illumination – Light source and modifier – Including reflector
Patent
1975-10-08
1978-02-21
Hix, L. T.
Illumination
Light source and modifier
Including reflector
362307, 362310, 362311, F21V 702
Patent
active
040754715
ABSTRACT:
A lamp assembly has a housing of which part defines a parabolic or paraboloidal mirror and part defines part of an ellipsoidal reflector. A lamp filament is mounted at the inner focal point of the reflector and the focal point of the mirror coincides with the outer focal point of the reflector. The housing has a lens element defining a window through which light is directed from the mirror.
In one embodiment, an additional mirror and lens element are provided for receiving light from the reflector. The additional mirror directing the light in the opposite direction to the light directed by the first mentioned mirror.
In another embodiment, further mirrors are provided in the housing for increasing the horizontal spread of light.
REFERENCES:
patent: 1852222 (1972-04-01), Stead
patent: 1898143 (1933-02-01), Schensted
patent: 2147679 (1939-02-01), Stanton et al.
patent: 2592075 (1952-04-01), Smith
patent: 3609340 (1971-09-01), Habro
patent: 3634675 (1972-01-01), Madsen
patent: 3752408 (1973-08-01), Tixien
patent: 3766373 (1973-10-01), Hedgewick
Brady W. J.
Hix L. T,.
Lucas Electrical Company Limited
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