Illumination – Light source and modifier – Condition responsive
Patent
1978-07-10
1982-08-03
Nelson, Peter A.
Illumination
Light source and modifier
Condition responsive
362147, 362308, 362332, 362802, F21V 2304
Patent
active
043430325
ABSTRACT:
A housing having means for connecting to a conventional electric outlet. The housing is provided with a lower portion having a printed circuit and a transparent lens. The circuit includes a photo conductive cell sensitive to the light through the lens. The cell is designed to become more conductive in the dark and less conductive in daylight, gradually fading from one condition to the other. The circuit also includes an electric light mounted in the upper portion of the housing and covered by a transluscent shade. Current to the light is passed through a Quadrac which is activated by a connection between its gate and the photo cell. As the light fades in the room, the photo cell transmits more and more current to the quadrac gate and the light gradually gets brighter and brighter. This makes a fine auxiliary light in a bathroom or similar location in the home since it is small and compact.
REFERENCES:
patent: 3724931 (1973-04-01), Nevyas
patent: 3739226 (1973-06-01), Seiter et al.
patent: 3751711 (1973-08-01), Schick
patent: 3870873 (1975-03-01), Mallory
patent: 4177500 (1979-12-01), Nicholl et al.
Markus, John, Guidebook of Electronic Circuits, McGraw-Hill Book Co., 1974, p. 389.
Cable Electric Products, Inc.
Nelson Peter A.
Sutton Paul J.
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