Dryer

Claim 1

HEATING APPARATUS COMPRISING, IN COMBINATION, AN ELONGATED TUBULAR CHAMBER OPEN AT BOTH ENDS, A BURNER GENERALLY COAXIALLY LOCATED WITHIN SAID CHAMBER ADJACENT ONE END THEREOF, MEANS FORMING AN ANNULAR AIR RESERVOIR AROUND SAID BURNER, A PLURALITY OF LEGS EXTENDING RADIALLY BETWEEN SAID BURNER AND SAID CHAMBER TO SUPPORT THE BURNER, A FAN MOUNTED AND OPERATIVE TO BLOW A SPIRAL STREAM OF AIR THROUGH SAID CHAMBER, SAID AIR ENTERING SAID CHAMBER THROUGH SAID ONE END AND BECOMING HEATED AS IT PASSES BY SAID BURNER, THE HEATED AIR THEN TRAVELING THROUGH THE CHAMBER FOR DISCHARGE THROUGH THE OPPOSITE END, SAID BURNER BEING CLOSED TOWARD SAID FAN AND OPENED IN A DIRECTION AWAY FROM THE FAN AND HAVING RADIAL AIR INLETS COMMUNICATING WITH SAID ANNULAR AIR RESERVOIR, EACH OF SAID LEGS BEING U-SHAPED IN CROSS-SECTION ALONG ITS RADIAL EXTENT AND OPENED TOWARD SAID FAN TO SCOOP AIR FROM SAID SPIRAL STREAM, A BAFFLE PROJECTING FROM EACH OF SAID LEGS TOWARD SAID FAN AND EXTENDING SUBSTANTIALLY BETWEEN SAID BURNER AND THE WALL OF SAID CHAMBER AND INTO SAID AIR STREAM TO DEFLECT AIR INTO SAID LEGS, THE AIR SCOOPS FORMED BY SAID LEGS COMMUNICATING WITH SAID ANNULAR AIR RESERVOIR TO DIRECT AIR THERETO, AIR FOR OPERATING SAID BURNER BEING DERIVED FROM SAID AIR RESERVOIR WHEREBY THE NEED FOR AN AUXILIARY FAN TO SUPPLY AIR TO THE BURNER IS OBVIATED.