Combination oil and gas burner

Claim 1

IN COMBINATION WITH A FURNACE WALL HAVING A BURNER PORT THEREIN, A HIGH CAPACITY BURNER HAVING A RELATIVELY LOW DRAFT LOSS COMPRISING AN AIR REGISTER FOR RECEIVING COMBUSTION AIR, SAID AIR REGISTER HAVING AN AIR INLET AND AN AXIAL AIR OUTLET, MEANS FOR IMPARTING A WHIRLING MOVEMENT TO THE AIR FLOWING THROUGH SAID AIR REGISTER, A LONGITUDINALLY EXTENDING BURNER SLEEVE CONNECTED AT ONE END TO SAID REGISTER OUTLET AND HAVING A DIAMETER GREATER THAN THAT OF SAID BURNER PORT WHEREBY THE LENGTH OF SAID SLEEVE TENDS TO DIMINISH THE WHIRLING MOVEMENT OF THE AIR FLOWING THERETHROUGH, A FRUSTO-CONICAL ENTRANCE PIECE CONNECTED TO THE OTHER END OF SAID BURNER SLEEVE AND CONVERGING TOWARD SAID BURNER PORT, A GAS MANIFOLD CIRCUMSCRIBING SAID ENTRANCE PIECE ADJACENT SAID BURNER PORT, AND A PLURALITY OF CIRCUMFERENTIALLY SPACED GAS SPUDS, EACH OF SAID SPUDS EXTENDING INWARDLY FROM SAID MANIFOLD IN A SUBSTANTIALLY RADIAL DIRECTION AND HAVING A MAJOR PORTION OF ITS LENGTH EXPOSED TO THE AIR FLOWING THROUGH SAID ENTRANCE PIECE, EACH OF SAID SPUDS HAVING DIAMETRICALLY OPPOSED ROW OF SPACED ORIFICES EXTENDING LONGITUDINALLY ALONG THE LENGTH OF SAID SPUD AND THE AXES OF SAID ORIFICES LYING IN A PLANE SUBSTANTIALLY PARALLEL TO SAID FURNACE WALL, SAID AXES OF SAID ORIFICES EXTENDING IN A SUBSTANTIALLY NON-RADIAL DIRECTION WITH RESPECT TO THE LONGITUDINAL AXIS OF SAID BURNER SO THAT A SHEET OF GAS DISCHARGED FROM SAID ROWS FO ORIFICES SUBSTANTIALLY NORMAL TO THE FLOW OF AIR AND SUBSTANTIALLY NORMAL TO THE LONGITUDINAL AXIS OF SAID BURNER.