Involute beam concentrator

Details Involute beam concentrator Involute beam concentrator

1984-12-14

1986-09-09

Petrakes, John

Stoves and furnaces

Stoves

Cooking

126438, 126439, 350613, 350628, 350629, 372 99, 372107, G02B 510, F24J 210, F24J 214

Patent

active

046105182

ABSTRACT:
A glass or metal wall forming an involute curve through three revolutions around a central axis parallel thereto, mounted between parallel front and rear walls perpendicular thereto and forming a chamber which is curved in cross section and rectangular in longitudinal section.
The chamber is reflective in the interior and communicates with the exterior through a rectangular port formed by the terminating involute wall and the section of involute wall adjacent thereto.
A concentrated rectangular beam of sunlight from a prismatic beam concentrator is projected into the chamber through the port. The beam undergoes further concentration as it curves in toward the center of the concentrator, where it is emitted through an aperture in the rear wall, forming a concentrated circular beam parallel to the axis of the concentrator.

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patent: 4402574 (1983-09-01), McConnel
patent: 4440153 (1984-04-01), Melchior
patent: 4567879 (1986-02-01), Clegg

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