Burner structure for producing spectral flames

Claim 1

IN APPARATUS FOR USE IN SPECTROPHOTOMETRIC ANALYSIS, A BURNER ASSEMBLY COMPRISING; MEANS DEFINING A GENERALLY ANNULAR FIRST ORIFICE ON ONE SIDE OF SAID ASSEMBLY; MEANS FOR CONDUCTING A FUEL GAS UNDER PRESSURE TO SAID ORIFICE; MEANS DEFINING A SECOND ORIFICE SUBSTANTIALLY CENTRALLY CONCENTRIC TO SAID ORIFICE AND ON THE SAME SIDE OF SAID ASSEMBLY; MEANS FOR CONDUCTING A COMBUSTIONSUPPORTING GAS UNDER PRESSURE TO SAID SECOND ORIFICE; AND AN ASPIRATOR TUBE HAVING A CAPILLARY PASSAGEWAY THERETHROUGH, SAID TUBE EXTENDING THROUGH SAID BURNER ASSEMBLY WITH AN OPEN END OF SAID PASSAGEWAY POSITIONED SUBSTANTIALLY CENTRIALLY OF SAID SECOND ORIFICE AND SO ARRANGED THAT THE VENTURI EFFECT OF GAS ISSUING FROM SAID SECOND ORIFICE AND PAST THE OPEN END OF SAID TUBE ASPIRATES AND ENTRAINS FLUID FROM SAID TUBE, THE OTHER END OF SAID TUBE BEING OPEN AND PROJECTING A SUBSTANTIAL DISTANCE FROM THE OTHER SIDE OF SAID ASSEMBLY WHEREBY THE SAID OTHER END OF SAID TUBE MAY BE SELECTIVELY POSITIONED IN A LIQUID SAMPLE TO BE ASPIRATED THERETHROUGH FOR ANALYSIS.