Method and apparatus for burning a mixture of liquid and gaseous fuels

Claim 1

APPARATUS FOR BURNING A MIXTURE OF IQUID AND GASEOUS FUELS COMPRISING A CENTRAL TUBE HAVING AN IMPERFORATE WALL AND AN INLET END ADAPTED TO BE CONNECTED TO A SOURCE OF LIQUID FUEL AND AN OUTLET END OF REDUCED INTERNAL DIAMETER, SAID TUBE HAVING A DISCHARGE OPENING AT ITS OUTLET END, THE OUTER SURFACE OF THE TUBE ADJACENT SAID OUTLET END TAPERING INWARDLY FROM A MAXIMUM DIAMETER TO A MINIMUM DIAMETER AT THE DISCHARGE OPENING, A SECOND TUBE HAVING AN IMPERFORATE WALL SURROUNDING SAID CENTRAL TUBE IN SPACED COAXIAL RELATIONSHIP THEREWITH AND HAVING AN INLET END ADAPTED TO BE CONNECTED TO A SOURCE OF GASEOUS FUEL AND AN OUTLET END EXTENDING A SUBSTANTIAL DISTANCE BEYOND THE OUTLET END OF SAID CENTRAL TUBE, SAID SECOND TUBE HAVING A PASSAGE WITH MEANS FORMING A RESTRICTION THEREIN TAPERING FROM A MAXIMUM DIAMETER ON THE INLET SIDE TO A MINIMUM DIAMETER AT A TRANSVERSE PLANE APPROXIMATELY THROUGH THAT END OF THE TAPERED SURFACE ON SAID CENTRAL TUBE REMOTE FROM SAID DISCHARGE OPENING, SAID RESTRICTION DIRECTING SAID GASEOUS FUEL INWARDLY AT INCREASED VELOCITY INTO THE LIQUID FUEL TO ATOMIZE THE LATTER, AND AN IMPERFORATE OXYGEN TUBE WITHIN SAID SECOND TUBE SURROUNDING SAID CENTRAL TUBE IN SPACED COAXIAL RELATIONSHIP THEREWITH AND HAVING AN INLET END ADAPTED TO BE CONNECTED TO A SOURCE OF OXYGEN AND AN OULET END TERMINATING ADJACENT SAID TRANSVERSE PLANE, SAID OXYGEN TUBE BEING SPACED FROM SAID SECOND TUBE TO PROVIDE A FUEL GAS PASSAGEWAY.