Heating furnace

Claim 1

A FURNACE COMPRISING A HOLLOW HEAT EXCHANGER HAVING A PERIPHERAL WALL, AND FRONT AND REAR WALLS, RESPECTIVELY, AND AN INTERMEDIATE PARTITION WALL BETWEEN, AND IN SPACED FACE TO FACE RELATION TO BOTH THE FRONT AND REAR WALLS, SAID INTERMEDIATE WALL HAVING AN INLET FOR PRODUCTS OF COMBUSTION NEAR ONE END AND AN OUTLET FOR SAID PRODUCTS NEAR THE OTHER END, THE SPACE BETWEEN THE FRONT WALL AND INTERMEDIATE WALL PROVIDING A RECIRCULATING DUCT CONNECTING THE OUTLET AND INLET; A COMBUSTION CHAMBER DISPOSED IN SAID SPACE AT SAID ONE END AND HAVING AN OPEN DISCHARGE END WHICH IS ALIGNED WITH SAID INLET AND DIRECTED TOWARD THE REAR WALL; SAID CHAMBER HAVING A PERIPHERAL ENCLOSING WALL SPACED FROM THE PERIPHERAL WALL OF THE EXCHANGER SO THAT PRODUCTS FROM SAID DUCT CAN IMPINGE ON ONE SIDE OF SAID PERIPHERAL WALL OF THE CHAMBER AND FLOW IN SURROUNDING RELATION THERETO, SAID PERIPHERAL WALL OF THE CHAMBER AT THE DISCHARGE END BEING ARRANGED IN SPACED RELATION, TRANSVERSELY OF THE DISCHARGE END, TO THE PERIPHERY OF THE INLET SO AS TO FORM THEREWITH AN ANNULAR PASSAGE FOR DISCHARGING TOWARD THE REAR WALL; BURNER MEANS FOR DISCHARGING HYDROCARBON FUEL INTO THE CHAMBER IN A DIRECTION TOWARD THE OPEN DISCHARGE END, MEANS HAVING AIR INDUCTION PORTS CONNECTED DIRECLTY TO THE ATMOSPHERE AND ARRANGED TO PERMIT INDUCTION OF AIR INTO THE CHAMBER FOR SUSTAINING COMBUSTION THEREIN; A POWER DRIVEN RECIRCULATING BLOWER CONNECTED WITH THE INTERIOR OF THE EXCHANGER SO AS TO RECIRCULATE PRODUCTS OF COMBUSTION FROM SAID OUTLET INTO SURROUNDING RELATION TO THE CHAMBER AND THENCE THROUGH SAID INLET; BLEEDER DUCT MEANS IN COMMUNICATION WITH THE EXCHANGER AND OPERABLE FOR BLEEDING TO THE ATMOSPHERE A FRACTION OF THE PRODUCTS BEING RECIRCULATED; AND THE DISCHARGE END OF THE CHAMBER AND PERIPHERY OF THE INLET OF THE HEAT EXCHANGER BEING SPACED APART AND ARRANGED SO THAT THE RECIRCULATED PRODUCTS BLOWN THROUGH THE DUCT, COMBINED WITH THE BLEEDING OF PRODUCTS OF COMBUSTION INTO THE ATMOSPHERE, CREATE A LOW PRESSURE ZONE AROUND THE DISCHARGE END OF THE CHAMBER.