Stoves and furnaces – Tool having fluid fuel burner – Curling iron
Patent
1979-08-24
1981-04-21
Yeung, James C.
Stoves and furnaces
Tool having fluid fuel burner
Curling iron
126438, 353 3, 350288, F24J 302
Patent
active
042626544
ABSTRACT:
Apparatus for following the sun using the sun's radiant energy to heat a fluid-containing sensor to create a pressure which is used to rotate the apparatus against a spring force provided by an expansion bellows. The sunlight is permitted to strike the sensor only for certain angles of incidence to the apparatus so that the fluid pressure and the spring force rotate the apparatus to a predetermined position relative to the angle of incidence. In one embodiment, sunlight passing through a filter including several parallel plates which allow passage of sunlight having a predetermined angle of incidence relative to the filter is focused on the sensor. A reflector focuses sunlight on the sensor to reposition the apparatus to the desired position when the apparatus is incorrectly positioned because the sun has been obscured by clouds. In two alternative embodiments, a fresnel lens and a parabolic reflector, respectively, focus sunlight having a predetermined angle of incidence onto the sensor. In the alternative embodiments, a thermally conducting fin attached to the sensor receives the focused sunlight to reposition the apparatus then the sun reappears after having been obscured by clouds.
REFERENCES:
patent: 4027651 (1977-06-01), Robbins, Jr.
patent: 4089323 (1978-05-01), Trihey
patent: 4175391 (1979-11-01), Baer
patent: 4185615 (1980-01-01), Bottum
patent: 4198954 (1980-04-01), Meijer
Farber et al., "Self Contained Solar Powered Tracking Device," Asme Paper 76-WA/HT-'76.
Daubenspeck William C.
Sciascia Richard S.
St.Amand Joseph M.
Yeung James C.
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