Fuel burner with adjustable nozzle

Claim 1

IN A BURNER FOR CAUSING AN OUTWARDLY PROJECTING FLAME PATTERN INCLUDING A NOZZLE, A CENTRALLY LOCATED CASING WITH A FIRST OUTLET FOR DIRECTING FUEL THROUGH SAID NOZZLE, MEANS FORMING A SUBSTANTIALLY ANNULAR PASSAGE WITHIN SAID BURNER, AROUND SAID CASING AND COAXIAL WITH SAID CASING, SAID PASSAGE FORMING MEANS INCLUDING AN OUTER CYLINDRICAL WALL IN SAID BURNER AND AN INNER CYLINDRICAL WALL, SAID PASSAGE HAVING AN ANNULAR SECOND OUTLET ADJACENT THE SAME END OF SAID NOZZLE AS SAID FIRST OUTLET WHEREBY SAID SECOND OUTLET IS CONCENTRIC WITH THE FIRST OUTLET, SAID SECOND OUTLET HAVING A SUBSTANTIALLY FIXED CROSS-SECTION AND MEANS DIRECTING PRESSURIZED COMBUSTION SUPPORTING FLUID THROUGH SAID PASSAGE AND OUT SAID SECOND OUTLET, THE IMPROVEMENT COMPRISING: ADJUSTABLE MEANS IN SAID ANNULAR SECOND OUTLET FOR ADJUSTING THE TURBULENCE OF SAID FLUID FLOWING THERETHROUGH TO CHANGE SAID FLAME PATTERN BETWEEN A PATTERN CONCENTRATED AT SAID OUTLETS AND A PATTERN REMOTE FROM SAID OUTLET WITHOUT SUBSTANTIALLY CHANGING THE AMOUNT OF FLUID FLOWING THROUGH SAID ANNULAR SECOND OUTLET, SAID TURBULENCE ADJUSTING MEANS COMPRISING A PLURALITY OF BLADES EXTENDING RADIALLY WITHIN SAID PASSAGE AND MOUNTED ON SAID INNER WALL, EACH OF SAID BLADES FORMING AN ANGLE WITH THE AXIS OF SAID ANNULAR PASSAGE, SAID BLADES TAPERING DOWNWARDLY FROM A HEIGHT GENERALLY MATCHING THE WIDTH OF SAID SECOND OUTLET AT THE REAR OF SAID BLADES TO A HEIGHT SUBSTANTIALLY LESS THAN THE WIDTH OF SAID SECOND OUTLET AT THE FRONT OF SAID BLADES, AND MEANS FOR MOVING SAID BLADES AND INNER WALL AS A UNIT, IN UNISON, AXIALLY WITHIN SAID PASSAGE BETWEEN A REARWARDMOST POSITION WHERE THE LESSER HEIGHT PORTIONS OF SAID BLADES ARE WITHIN THE SECOND OUTLET OF SAID ANNULAR PASSAGE TO IMPART A LESSER AMOUNT OF TURBULENCE TO SAID FLUID FLOWING THERETHROUGH AND A FORWARDMOST POSITION WHERE THE GREATER HEIGHT PORTIONS OF SAID BLADES ARE WITHIN THE SECOND OUTLET OF SAID ANNULAR PASSAGE TO IMPART A GREATER AMOUNT OF TURBULENCE TO SAID FLUID FLOWING THERETHROUGH.