Self-stabilizing combustion apparatus

Claim 1

SELF-STABILIZING BURNER APPARATUS COMPRISING, IN COMBINATION: WALL MEANS INCLUDING A BACKPLATE FORMING A SUBSTANTIALLY CYLINDRICAL COMBUSTION CHAMBER HAVING AN INLET END AND AN EXIT END; WALL MEANS FORMING A BURNER BODY CIRCUMPOSING SAID COMBUSTION CHAMBER AND FORMING AN ANNULAR CHAMBER THEREWITH; A REFRACTORY TUNNEL BLOCK HAVING A TUNNEL IN FLUID COMMUNICATION WITH SAID COMBUSTION CHAMBER AND SAID ANNULAR CHAMBER, A FUEL INLET PIPE FOR DELIVERING A STREAM OF FUEL SUBSTANTIALLY AXIALLY TO SAID COMBUSTION CHAMBER, SAID PIPE HAVING AN OUTLET END DISPOSED WITHIN SAID COMBUSTION CHAMBER AT A POINT SOMEWHAT DOWNSTREAM FROM THE BACKPLATE THEREOF; AND INLET CONNECTION FOR DELIVERING A STREAM OF AIR TO SAID ANNULAR CHAMBER; AN INLET CONDUIT MEANS EXTENDING FROM SAID COMBUSTION CHAMBER TO SAID ANNULAR CHAMBER FOR DELIVERING A PORTION OF SAID STREAM OF AIR FROM SAID ANNULAR CHAMBER TO SAID COMBUSTION CHAMBER FOR COMBUSTION A PORTION OF SAID STREAM OF FUEL, SAID AIR INLET CONDUIT MEANS BEING DISPOSED TANGENTIALLY TO SAID COMBUSTION CHAMBER AND PERPENDICULARLY TO THE AXIS THEREOF AND BEING DISPOSED UPSTREAM FROM THE OUTLET END OF THE FUEL INLET PIPE; AND A RESTRICTED ORIFICE DISPOSED WITHIN SAID ANNULAR CHAMBER BEING ADAPTED TO RESTRICT THE FLOW OF THE REMAINING PORTION OF THE STREAM OF AIR FROM SAID ANNULAR CHAMBER TO SAID TUNNEL, THEREBY CAUSING THE REMAINING PORTION OF THE AIR STREAM AND THE UNCOMBUSTED PORTION OF THE STREAM OF FUEL TO MIX RAPIDLY IN SAID TUNNEL.