Swirler for use with burners of the gun type

Claim 1

A SWIRLER FOR USE WITH A BURNER OF THE GUN TYPE WHEREIN AIR BLOWS FORWARDLY IN A BURNER TUBE TO A COMBUSTION CHAMBER AND PAST A FUEL DISCHARGE NOZZLE, SAID SWIRLER BEING ADAPTED TO BE SUPPORTED TRANSVERSELY IN SAID BURNER TUBE ADJACENT SAID DISCHARGE NOZZLE, SAID SWIRLER BEING CIRCULAR IN CONFIGURATION AND COMPRISING AN INNER FLAT RING HAVING A CENTRAL OPENING THEREIN FOR SAID DISCHARGE NOZZLE, A PLURALITY OF FAN-LIKE BLADES FORMED INTEGRALLY WITH SAID INNER FLAT RING AND EXTENDING RADIALLY THEREFROM, EACH OF SAID FAN-LIKE BLADES BEING DEFINED BY A PAIR OF IDENTICAL ARCS HAVING THE CENTER OF EACH LYING ON A RAY WHICH IS EQUIANGULARLY SPACED FROM AN ADJACENT RAY, EACH OF SAID ARCS EXTENDING FROM THE PERIPHERY OF SAID SWIRLER TO A POINT AT ITS INNER END SUBSTANTIALLY TANGENT TO SAID INNER FLAT RING, EACH OF SAID FAN-LIKE BLADES BEING TWISTED ALONG ANOTHER RAY PASSING SUBSTANTIALLY THROUGH THE POINT DEFINING SAID ARC AT ITS INNER END, THE AREA OF AIR FLOW BETWEEN ADJACENT BLADES DESCREASING FROM A MAXIMUM AT THE PERIPHERY TO SUBSTANTIALLY ZERO AREA OF FLOW AT THE PERIPHERY OF THE FLAT RING TO SUPPLY MINIMUM AIR TO THE FLAME EMERGING AT THE CENTER OF SAID FLAT RING TO PREVENT "DANCING" OF THE FLAME PATTERN TOWARD AND AWAY FROM SAID NOZZLE.