Abstract: A combination solar absorber and atmospheric radiator in multiple embodiments, a method for constructing these embodiments, and a method for using the combination solar absorber and atmospheric radiator, the absorber/radiator has a thermally conductive sheet which serves as a back plate, tubular fluid conduit or conduits, generally rectangular thermally conductive caps, and a means for fastening the caps to the sheet, covering one or more conduits and pressing them against the sheet. The side of the sheet with the caps and conduits is exposed to the sun and atmosphere, providing two thermal pathways to and from the conduit.

Abstract: An apparatus and method are disclosed by which the temperature of an enclosure can be prevented from reaching extremely high or extremely low points. The enclosure provides a functional area whose temperature is adjusted by heated or cooled water contained within a water container which is located above the functional area and below the ceiling of the enclosure. The water in the water container is heated or cooled, depending on the desired effect, by exposing the water to atmospheric conditions while passing through a radiator/absorber located on the roof of the enclosure. The radiator/absorber has an inclined configuration, with higher and lower ends. The water passes from the water container to the radiator/absorber and back again to the water container through a pair of conduits. A warm water conduit runs between one end of the water container and the higher end of the radiator/absorber, while a cold water conduit runs between the other end of the water container and the lower end of the radiator/absorber.

Abstract: A device is provided for stabilizing a flexible membrane secured within a frame, wherein a plurality of elongated arms are disposed radially from a central hub which penetrates the membrane, said arms imposing alternately against opposite sides of the membrane, thus warping and tensioning the membrane into a condition of improved stability. The membrane may be an opaque or translucent sheet or other material.