Illumination control apparatus for compensating solar light

Details Illumination control apparatus for compensating solar light Illumination control apparatus for compensating solar light

1976-12-23

1978-10-24

Dahl, Lawrence J.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

200 61, 200 46, 200201, 200220, 250214AL, 315153, H01J 3912, H05B 3702

Patent

active

041223349

ABSTRACT:
Illumination control apparatus for supplementing light from solar radiation with light from an artificial light source to compensate for periods of insufficient levels of solar light to maintain a desired illumination level within an interior space comprising an artificial light source connected to an electrical power source with switch means for selectively energizing said light source, actuator means for controlling the on-off operation of the switch means, a light sensor connected to the actuator means for controlling the actuator means in response to the illumination level of the interior space, and a limit switch carried adjacent the actuator for limiting the movement of the actuator within a predetermined range so as to prevent further movement thereof during detection of erroneous illumination conditions.

REFERENCES:
patent: 3350581 (1967-10-01), Stein, Jr.
patent: 3961183 (1976-06-01), Dubot et al.

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