Parasitic driven heliostat mirror declinator

Details Parasitic driven heliostat mirror declinator Parasitic driven heliostat mirror declinator

1982-01-28

1983-09-06

Marcus, Stephen

Optics: image projectors

Heliostats

126424, 350289, 350568, G03D 2100

Patent

active

044025823

ABSTRACT:
An automatic parasitically driven declinator for changing the tilt angle of the mirror of a heliostat to provide solar declination tracking by the heliostat. The declinator includes an axial gear drive train coupled to the polar axial shaft of the heliostat, which shaft is rotated. A pendulum arrangement coupled via an input shaft to the axial gear drive train is substantially held in plumb position by gravity wherein the gear drive train is driven as it is rotated about the polar axis by the polar axial shaft. An output shaft coupled to the gear train is rotated to drive a skew bar linkage assembly that is connected to the mirror mounting assembly of the heliostat. The gear ratio of the gear drive train assembly is made 365:1 so that the mirror angle is annually nutated a predetermined number of degrees corresponding to the cyclic variations of solar declination.

REFERENCES:
patent: 1169076 (1916-01-01), Greve
patent: 1185611 (1916-05-01), Dougan
patent: 1451387 (1923-04-01), Burns
patent: 2045191 (1936-06-01), Kreidler
patent: 2646720 (1953-07-01), Poliansky
patent: 3656844 (1972-04-01), Botskor
patent: 4149777 (1979-04-01), Bunch

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