Sports lighting luminaire having a broken glass safety shutdown

Details Sports lighting luminaire having a broken glass safety shutdown Sports lighting luminaire having a broken glass safety shutdown

1993-07-14

1995-03-21

Cole, Richard R.

Illumination

With filament control means responsive to fracture of light...

362276, 315 73, F21V 2504

Patent

active

054002230

ABSTRACT:
A sports lighting fixture having a broken glass detection arrangement includes a high intensity light source disposed near the closed end of a reflector member. A cover member made of a light transmissive material is disposed at the open end of the reflector and is effective for filtering UV radiation emitted by the light source. A ballast circuit has in input portion receptive of line power and an output portion effective for conditioning the line power to energize the light source. A conductor strip is disposed on the cover member and is effective such that, when the cover member is intact, an electrical signal can be passed therethrough. An interruption circuit arrangement is electrically coupled into the ballast circuit and has the conductive strip disposed therein so that, upon the occurrence of an open condition in the conductive strip, indicative of a broken glass condition, the interruption circuit arrangement is effective for interrupting current flow in the ballast circuit thereby resulting in a shutdown of power to the light source and the consequent prevention of further UV emission until such time as the cover member is replaced.

REFERENCES:
patent: 2313165 (1943-03-01), Nelms et al.
patent: 2535819 (1950-12-01), Stamper
patent: 4276580 (1981-06-01), Rogers
patent: 4937717 (1990-06-01), Betzvog, Jr.
patent: 5289352 (1994-02-01), Remos et al.

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