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U.S. Department of Energy
Office of Scientific and Technical Information

Solar tracking system employing inertial coasting

Patent ·
OSTI ID:5279546
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.
Assignee:
Mattel Inc.
Patent Number(s):
US 4510385
OSTI ID:
5279546
Country of Publication:
United States
Language:
English