Photocontrol device for grade mounted light fixture

Details Photocontrol device for grade mounted light fixture Photocontrol device for grade mounted light fixture

1988-03-31

1990-03-06

Lazarus, Ira S.

Illumination

With static structure

Pavement

362276, 362802, 250214AL, F21V 2304

Patent

active

049071394

ABSTRACT:
A light fixture has a light-transparent cover at substantially grade level and a photocontrol device with a self-flushing outer surface for preventing accumulation of opaque material thereon. The light fixture is adapted to be positioned within a recess in the graded environment and includes a housing which encloses a lamp electrically connected to the photocontrol device. The self-flushing outer surface of the photocontrol device discourages the build-up of opaque material so that the photocontrol device can reliably detect changes in the ambient light conditions outside the light fixture and operate the lamp in response to the detected changes.

REFERENCES:
patent: 2038506 (1936-04-01), Cadieux
patent: 2631247 (1953-03-01), Shaw
patent: 3264466 (1966-08-01), Bacon
patent: 3274392 (1966-09-01), Harling
patent: 3543099 (1970-11-01), Turner
patent: 3880528 (1975-04-01), Petersen et al.
patent: 4207464 (1980-06-01), Fukuyama et al.
patent: 4343032 (1982-08-01), Schwartz
patent: 4382274 (1983-05-01), DeBacker et al.
patent: 4791290 (1988-12-01), Noone et al.

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