Heater

Claim 1

IN COMBINATION, A WALL-ENCLOSED CHAMBER ADAPTED TO CONFINE THE COMBUSTION OF A FUEL-AIR MIXTURE INTRODUCED THEREINTO AND HAVING A PORT THEREIN FOR ENABLING EXHAUSTION OF THE COMBUSTED MIXTURE THEREFROM, A LAYER OF ELECTRICAL INSULATION MATERIAL COVERING THE OUTER WALL ENCLOSURE OF SAID CHAMBER, A PLURALITY OF SERIALLY CONNECTED THERMOELEMENTS, EACH THERMOELEMENT HAVING A JUNCTION TO BE HEATED AND A JUNCTION TO BE COOLED, EACH OF SAID JUNCTIONS TO BE HEATED BEING IN CONTACT WITH SAID LAYER OF INSULATION MATERIAL AND IN HEAT TRANSFER RELATIONSHIP WITH SAID WALL ENCLOSURE, EACH SAID JUNCTION TO BE COOLED BEING AT AN EXTREMITY OF ITS RESPECTIVE THEREMOELEMENT AND REMOTELY SITUATED FROM SAID INSULATION LAYER AND SAID WALL ENCLOSURE, A SEPARATING WALL SPACED APART FROM SAID LAYER OF INSULATION AND SITUATED BETWEEN SAID JUNCTIONS TO BE HEATED AND SAID JUNCTIONS TO BE COOLED, THE SEPARATING WALL DEFINING A FIRST FLOW PASSAGE BETWEEN SAID INSULATION LAYER AND SAID SEPARATING WALL AND A SECOND FLOW PASSAGE BETWEEN SAID JUNCTION TO BE COOLED AND SAID SEPARATING WALL, AND MEANS FOR CAUSING AIR TO FLOW THROUGH SAID FIRST AND SECOND FLOW PASSAGES SO THAT SAID FLOWING AIR COMES INTO CONTACT WITH SAID THERMOELEMENTS INCLUDING THE JUNCTIONS THEREOF.