Radiant energy – Photocells; circuits and apparatus – Photocell controls its own optical systems
Patent
1982-11-08
1985-04-09
Westin, Edward P.
Radiant energy
Photocells; circuits and apparatus
Photocell controls its own optical systems
126425, G01J 124
Patent
active
045103852
ABSTRACT:
A solar tracking system is disclosed which includes a solar powered motor coupled to a rotatable collector using a high reduction gear arrangement. The collector rotates about pivot bearings and is counterbalanced about such bearings by counterweights. A light sensor which actuates the motor when illuminated by sunlight is mounted in relation to one of the counterweights so that the counterweight casts a shadow over the sensor when the collector has moved to a position slightly before the position where the sun is aligned with the collector. At this point, the motor is de-energized and the inertia of the motor, collector and counterweights in cooperation with the gear arrangement causes the collector to coast into alignment with the sun.
REFERENCES:
patent: 3996460 (1976-12-01), Smith
patent: 4213303 (1980-07-01), Lane
patent: 4325788 (1982-04-01), Snyder
Mattel Inc.
Westin Edward P.
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