Dual blower and burner for furnaces

Claim 1

IN A FURNACE CONSTRUCTION OF THE CHARACTER DISCLOSED, A WALL, A COMBUSTION CHAMBER EXTENDING FROM ONE SIDE THEREOF, A BURNER ON THE OTHER SIDE OF SAID WALL DISCHARGING AT ONE END INTO SAID COMBUSTION CHAMBER AND HAVING A COMBUSTION AIR INLET AT ITS OTHER END, A COMBINATION INDUCED DRAFT AND COMBUSTION AIR BLOWER FOR SAID BURNER COMPRISING A HOUSING ON SAID OTHER SIDE OF SAID WALL HAVING A COMBUSTION AIR INLET OPPOSITE SAID WALL AND A PAIR OF BLOWER WHEELS THEREIN, A PARTITION SEPARATING ONE BLOWER WHEEL FROM THE OTHER AND DIVIDING SAID HOUSING INTO A FIRST SECTION CONTIGUOUS TO SAID WALL AND A SECOND SECTION SPACED FROM SAID WALL, PASSAGEWAY MEANS FOR THE PRODUCTS OF COMBUSTION FROM THE FAR END OF SAID COMBUSTION CHAMBER AND RETURNING TO THE INLET OF SAID FIRST SECTION, SAID FIRST SECTION HAVING AN OUTLET ADAPTED TO DISCHARGE TO A STACK, SAID HOUSING EXTENDING ALONG SAID WALL TO ENCOMPASS SAID BURNER AND COMMUNICATING SAID SECOND SECTION WITH THE COMBUSTION AIR INLET OF SAID BURNER, THE OUTER WALL OF SAID HOUSING BEING SPACED FROM SAID COMBUSTION AIR INLET TO PERMIT COMBUSTION AIR FROM SAID SECOND SECTION TO FLOW INTO SAID COMBUSTION AIR INLET, A SINGLE SHAFT ON WHICH BOTH OF SAID BLOWER WHEELS ARE MOUNTED, AND A SINGLE OUTBOARD BEARING FOR SAID SHAFT LOCATED ADJACENT SAID INLET OF SAID SECOND SECTION AND THEREBY IN THE PATH OF COMBUSTION AIR FLOW INTO SAID INLET OF SAID SECOND SECTION.