Electrical lighting fitting

Details Electrical lighting fitting Electrical lighting fitting

F - Mech Eng,Light,Heat,Weapons

21

V

240/178

F21V 21/00 (2006.01)

Patent

CA 1185579

ABSTRACT OF THE DISCLOSURE An electrical lighting fixture having a housing which defines two enclosures thermally insulated and physically displaced from each other. An air gap is provided between the enclosures through which cooling air can flow. A lamp is positioned in one of the enclosures with control equipment for the lamp in the other. The enclosure containing the lamp is maintained at a pressure other than ambient pressure and means are provided for detecting a change in pressure within the housing and for discontinuing electrical supply to the fitting in the event of a predetermined pressure change.

384504

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