Lighting fixture having a sealed, weatherproof secondary cover
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United States of America Patent
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-
Feb 14, 1989
Grant Date -
N/A
app pub date -
Dec 29, 1987
filing date -
Dec 29, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A light source is positioned within a substantially cylindrical, optically transparent enclosure having a load supporting base. The exterior surface of the enclosure includes a light converging lens having a plurality of jagged edges subject to contamination by dirt and moisture. An optically transmissive, substantially cylindrical secondary cover having a smooth exterior surface is coaxially fitted over the first enclosure to protect the jagged elements of the enclosure lens from contamination by dirt or moisture. An hermetic seal is formed between the lower, outer surface of the lens and the lower, inner surface of the secondary cover to prevent introduction of either dirt or moisture into the chamber formed between the exterior of the lens and the interior of the secondary cover.
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