Lighting fitting

Details Lighting fitting Lighting fitting

1979-05-04

1981-06-23

Lechert, Jr., Stephen J.

Illumination

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

Fluid or pressure responsive

362267, 362276, 362294, 362375, 362390, F21V 2500

Patent

active

042754330

ABSTRACT:
An electrical lighting fitting for a remotely hazardous area comprises two enclosures. The lamp itself is disposed in one enclosure and the control equipment for the lamp is disposed in the other around the axis of the fitting. The two enclosures are thermally insulated from each other and at least the one containing the lamp is maintained at a pressure other than ambient. A pressure switch is associated with this enclosure so that should a break occur in the enclosure this can be sensed and the electrical supply to the lamp removed. The thermal insulation enables the lamp to be run in temperatures which would not otherwise be possible. The enclosure housing of the lamp may be fixed to the remainder of the lamp by springs to enable lamp maintenance without the use of tools.

REFERENCES:
patent: 583959 (1897-06-01), Waegel

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