Apparatus for spectrophotometric quantitative analysis

Claim 1

IN A SPECTRO-PHOTOMETRIC ANALYTICAL APPARATUS, A FLAME GENERATING BURNER COMPRISING AN ELONGATED CYLINDRICAL SHELL CHAMBER HAVING AN INLET TUBE ADJACENT ONE END FOR INTRODUCING A COMBUSTIBLE GAS INTO THE CHAMBER, SAID CYLINDRICAL SHELL CHAMBER BEING PROVIDED AT ITS OTHER END WITH A DIAMETRICALLY REDUCED SUBSTANTIALLY CIRCULAR APERTURE, A NOZZLE-TUBE OF SUBSTANTIALLY SMALLER DIAMETER EXTENDING THROUGH SAID CYLINDRICAL SHELL CHAMBER AND HAVING AT ONE END A DISCHARGE NOZZLE ADJACENT TO AND SUBSTANTIALLY CONENCTRICALLY WITHIN AND SPACED FROM THE SUBSTANTIALLY CIRCULAR APERTURE PRODUCING AN ANNULAR FLAME PORT THEREWITH AND BEING PROVIDED WITH A PORTION HAVING A CONSTRICTED PASSAGE OPENING ADAPTED TO CREATE THEREWITH A VENTURI EFFECT, SAID NOZZLE-TUBE BEING PROVIDED ADJACENT ITS OTHER END WITH AN INLET TUBE FOR RECEIVING A HIGH-PRESSURE COMBUSTION-SUPPORTING GAS, AND A LIQUIDSAMPLE INTAKE TUBE OF SMALLER DIAMETER DISPOSED WITHIN AND EXTENDING COAXIALLY THROUGH THE NOZZLE-TUBE, SAID LIQUID-SAMPLE INTAKE TUBE TERMINATING AT ONE END SUBSTANTIALLY CONCENTRICALLY