Heating device

Claim 1

A heating device for use with a heat source, comprising a first heat pipe formed as a common heat reservoir, having walls, one of which is a bottom wall, with outside and inside surfaces, an outside surface of one wall being exposable to said heat source and the inside surfaces thereof defining a first heating space, first capillary material on the inside surface of at least said bottom wall, a plurality of separate heating chambers traversing said first heating space, each chamber being a heat pipe formed from an outer tube and an inner tube with a closed annular space defined by facing wall surfaces of said tubes and facing ends, and an oven space defined within the inner tube, second capillary material on said facing surfaces, and facing ends, vaporizable and condensable first and second heat transporting medium in said first heating space and in said annular spaces respectively, whereby, when heat is applied to said outside surface of the common reservoir wall, the first heat transporting medium in the first space is vaporized and flows to said heating chambers' outer tubes where it condenses on the outer surfaces of the outer tube walls, with heat transmitted through said outer tube walls to the second heat transporting medium within said annular spaces, which second medium vaporizes and flows to the inner tube wall where it condenses and provides heat which is transmitted through said inner wall to said oven therein.