Demand illumination control apparatus

Details Demand illumination control apparatus Demand illumination control apparatus

1979-01-12

1981-01-27

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

315154, H01J 4014

Patent

active

042477662

ABSTRACT:
Solar illuminating compensating apparatus is disclosed whereby the interior of a building is illuminated to a substantially constant, predetermined level of light intensity by a combination of natural illumination from the sun and artificial illumination from electricity wherein the intensity of said artificial illumination is controlled by fully electronic means which increases the level of artificial illumination when the natural illumination is inadequate and vice versa.

REFERENCES:
patent: 2269324 (1942-01-01), Turner et al.
patent: 3603799 (1971-09-01), Nobusawa
patent: 3665224 (1972-05-01), Kelsey
patent: 4122334 (1978-10-01), Owens

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