Oil burner

Claim 1

IN COMBINATION IN A FUEL BURNER, A GENERALLY CYLINDRICAL HOUSING, A GENERALLY CYLINDRICAL SHROUD FIXEDLY SECURED WITHIN SAID HOUSING PROVIDING AN AXIALLY EXTENDING PASSAGE BETWEEN SAID HOUSING AND SAID SHROUD, AN AXIALLY EXTENDING OPEN-ENDED TUBULAR CONDUIT INTRODUCING PRIMARY AIR UNDER POSITIVE PRESSURE AXIALLY INTO ONE END OF SAID CYLINDRICAL SHROUD, MEANS CLOSING SAID ONE END OF SAID HOUSING AROUND SAID CONDUIT, A FLOW DIRECTING BODY IN SAID SHROUD INTERMEDIATE THE ENDS THEREOF AND IMMEDIATELY DOWNSTREAM OF THE OPEN END OF SAID CONDUIT AND COMBINING THEREWITH TO PROVIDE AN ANNULAR RADIALLY OPENING SLIT FOR THE PASSAGE OF AIR FROM THE CONDUIT IN A DIRECTION RADIALLY OUTWARDLY ADJACENT SAID BODY, MEANS PROVIDING AN OPENING BETWEEN THE INTERIOR OF SAID SHROUD AND SAID PASSAGE UPSTREAM OF SAID BODY, THE UPSTREAM SURFACE OF SAID BODY BEING GRADUALLY CURVED IN THE DOWNSTREAM DIRECTION WHEREBY AIR LEAVING SAID SLIT ATTACHES TO SAID SURFACE FOR DEFLECTION DOWNSTREAM IN SAID SHROUD AND FOR ENTRAINMENT OF GAS IN SAID SHROUD UPSTREAM OF THE BODY, MEANS INTRODUCING FUEL INTO SAID SHROUD DOWNSTREAM OF SAID BODY FOR MIXTURE WITH AIR FLOWING DOWNSTREAM AROUND SAID BODY, MEANS FOR IGNITING SAID MIXTURE IN SAID SHROUD TO PROVIDE COMBUSTION AT THE DOWNSTREAM END OF SAID SHROUD AND AN OPENING IN THE DOWNSTREAM END OF SAID HOUSING PROVIDING FOR THE ESCAPE OF EXHAUST GASES FOLLOWING COMBUSTION.