# Patent

## Title
Solar tracking system

## Abstract

Wide possibilities in variation are possible within the scope of the invention, to obtain significant reductions in price per square meter of solar collector in relation to solar collectors known hitherto. Preferably, such a reduction in price is achieved with respect to the absorber section of the collector, while retaining maximum heat-transmission ability, resistance to corrosion and to heat, by making the upper part of the collector, said upper part being exposed to solar radiation, from copper foil, for example, and the lower part from inexpensive aluminum foil or galvanized, thin iron sheet, which may be coated with a thin layer of rubber, thereby providing the lower part of the collector with the same resistance to corrosion as that exhibited by the much more expensive copper foil. Thus, the rubber layer on the lower part of the absorber section can be used as a means of sealingly connecting the lower part of the absorber section to the upper part thereof, by vulcanizing at suitable locations. This possibility of vulcanizing the upper, solar-heat receiving part of the absorber to the lower part thereof can also be achieved with other material combinations possible within the scope of the invention, which minimizes the total price of the absorber and therewith also the solar collector.

## Background
## Claims

1. A solar-heat absorbing device comprising first and second elongated, thin flexible lengths of material placed one upon the other and joined together along a plurality of parallel, continuous longitudinally extending lines to form a plurality of separate fluid passages between said first and second lengths of material, characterized in that the first length of material (41) comprises a thin metal sheet positioned to be exposed to solar radiation formed, for example, of copper, brass, stainless steel or the like, the second length of material (42) comprising a heat-resistant rubber material having a plurality of integral mutually parallel upstanding ribs extending continuously from one end portion of the elongated device to the other end portion (43) onto which ribs the first material length is firmly vulcanized forming the plurality of passages (45) extending between said ribs (43).

2. A solar-heat absorbing device comprising first and second elongated, thin flexible lengths of material placed one upon the other and joined together along a plurality of parallel, continuous longitudinally extending lines to form a plurality of separate fluid passages between said first and second lengths of material, characterized in that the first length of material (41) comprises a thin metal sheet positioned to be exposed to solar radiation formed, for example, of copper, brass, stainless steel or the like, the second length of material (42) comprising a heat-resistant rubber material having a plurality of integral mutually parallel upstanding ribs extending continuously from one end portion of the elongated device to the other end portion (43) onto which ribs the first material length is firmly vulcanized forming the plurality of passages (45) extending between said ribs (43), said end portions of the elongated device each being enclosed by a transverse connecting block (46) sealingly joined to said end portions.