Electric lamp and discharge devices: systems – With radiant energy sensitive control means – Radiant energy controlled regulation of the current supply...
Patent
1975-02-14
1976-06-08
Grimm, Siegfried H.
Electric lamp and discharge devices: systems
With radiant energy sensitive control means
Radiant energy controlled regulation of the current supply...
250206, 315159, H05B 3904
Patent
active
039626008
ABSTRACT:
A circuit for automatically changing the amount of light provided by an illuminating source which contains a light sensitive device for monitoring the ambient light level. The light sensitive device controls current flow through a first path which includes the illumination source. A second path also provides current flow through the illumination source. When current is flowing through both paths, the source emits a predetermined amount of light. When only the second path conducts, the light provided by the illuminating source is substantially decreased.
REFERENCES:
patent: 3366834 (1968-01-01), Potter
patent: 3401265 (1968-09-01), Dotto
solid State Products, Inc., New Design Ideas, No. 7, "Light Sensor for High Level Digital Readout." Electronics, Dec. 6, 1963, pp. 56-58.
Arvin (Hong Kong) Ltd.
Grimm Siegfried H.
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