Optics: measuring and testing – Range or remote distance finding – With photodetection
Patent
1975-08-28
1977-05-10
McGraw, Vincent P.
Optics: measuring and testing
Range or remote distance finding
With photodetection
356244V, G01N 2116, G01J 330
Patent
active
040225305
ABSTRACT:
A graphite furnace for flameless atomic absorption spectroscopy comprising a graphite sample tube with a sample port at the mid-point of its length. Electrodes supportively contact the tube ends and pass electrical heating current through the tube. The electrodes have hollow cylindrical portions which laterally envelope the tube over substantially its entire length, one of the electrodes being longer than the other and containing a radial bore in registration with the sample port. The cylindrical portions of the electrodes are disposed with complementary-shaped recesses in cooling jackets which encase all but the mid-length regions of the electrode cylindrical portions. The electrodes fit readily in the cooling jackets at room temperature due to differential expansion of these members. The sample tube, electrodes, cooling jackets and associated structure are mounted on a base with provisions for adjustment of the tube about various orthogonal axes.
REFERENCES:
patent: 3788752 (1974-01-01), Slavin
patent: 3817629 (1974-06-01), Witte
Braun Klaus
Chlosta Wolfgang
Eier Franz
Huber Bernhard Werner
Tamm Rolf Gunther Arnold
Bodenseewerk Perkin-Elmer & Co. GmbH
Giarratana S. A.
Masselle F. L.
McGraw Vincent P.
O'Meara J. M.
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