Stoves and furnaces – Stoves – Cooking
Patent
1980-04-07
1983-02-15
Evans, F. L.
Stoves and furnaces
Stoves
Cooking
126438, 350292, G02B 508
Patent
active
043737838
ABSTRACT:
An improvement in a heliostat having a main support structure and pivoting and tilting motors and gears and a mirror module for reflecting solar energy onto a collector, the improvement being characterized by an internal support structure within each mirror module and front and back sheets attached to the internal support structure, the front and back sheets having the same coefficient of thermal expansion such that no curvature is induced by temperature change, and a layer of adhesive adhering the mirror to the front sheet. The adhesive is water repellent and has adequate set strength to support the mirror but has sufficient shear tolerance to permit the differential expansion of the mirror and the front sheet without inducing stresses or currature effect. The adhesive also serves to dampen fluttering of the mirror and to protect the mirror backside against the adverse effects of weather. Also disclosed are specific details of the preferred embodiment.
REFERENCES:
patent: 3600257 (1971-08-01), Reinhardt
patent: 3906927 (1975-09-01), Caplan
patent: 4245895 (1981-01-01), Wildenrotter
Atlantic Richfield Company
Evans F. L.
Fails James C.
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