Burner means for furnaces

Claim 1

A BURNER ASSEMBLY FOR THE HEATING OF FURNACES COMPRISING A BURNER BLOCK ADAPTED TO BE MOUNTED IN A FURNACE WALL AND DEFINING A COMBUSTION CHAMBER THEREIN, A BURNER NOZZLE ASSEMBLY MOUNTED ON THE FURNACE AND INCLUDING AN AIR PIPE AND A GAS PIPE HAVING A PORTION WITHIN SAID AIR PIPE EXTENDING ALONG THE AXIS OF SAID AIR PIPE AND A PLURALITY OF GAS OUTLET PORTS THEREIN EXTENDING IN A PLANE SUBSTANTIALLY PERPENDICULAR TO THE AXIS OF SAID AIR PIPE, MEANS FOR SUPPLYING AIR UNDER PRESSURE TO SAID AIR PIPE WHEREBY THE AIR FLOWS THROUGH SAID AIR PIPE AND ALONG THE EXTERIOR OF SAID GAS PIPE, MEANS FOR SUPPLYING FUEL GAS UNDER PRESSURE TO SAID GAS PIPE WHEREBY FUEL GAS FLOWS THROUGH SAID GAS PIPE AND SAID PORTS TO ENTER THE AIR STREAM PERPENDICULARLY TO THE DIRECTION OF AIR FLOW SO THAT THOROUGH INTERMIXING OF AIR AND GAS OCCURS, MEANS DEFINING A MIXING CHAMBER ARRANGED TO RECEIVE THE INTERMIXING AIR AND GAS, AND ORIFICE MEANS PROVIDING COMMUNICATION BETWEEN SAID MIXING CHAMBER AND SAID COMBUSTION CHAMBER, SAID ORIFICE MEANS BEING CONSTRUCTED TO PROVIDE A RESTRICTION TO FLOW FROM SAID MIXING CHAMBER AND INCLUDING A MEMBER DEFINING A PASSAGE A PORTION OF WHICH CONVERGES IN THE DIRECTION OF FLOW OF THE GAS-AIR MIXTURE AND A BAR EXTENDING TRANSVERSELY ACROSS SAID ORIFICE PASSAGE AND ELONGATED IN THE DIRECTION OF FLOW THEREBY TO RESTRICT FLOW FROM SAID MIXING CHAMBER, SAID MIXING CHAMBER BEING IMMEDIATELY ADJACENT THE UPSTREAM END OF SAID ORIFICE MEANS, SAID GAS OUTLET PORTS BEING LOCATED WITHIN SAID MIXING CHAMBER AND CLOSE TO SAID RESTRICTED ORIFICE PASSAGE SO THAT THE GAS STREAM ENTERING SAID MIXING CHAMBER IS SUBJECTED TO A BACK PRESSURE PROVIDED BY SAID RESTRICTED ORIFICE PASSAGE WHICH PRODUCES TURBULENCE AND EDDY CURRENTS IN THE REGION OF THE GAS ENTRANCE TO ENHANCE THE MIXING ACTION OF THE GAS AND AIR WITHIN SAID MIXING CHAMBER.