Method and apparatus for analyzing a composition of an alloy

Details Method and apparatus for analyzing a composition of an alloy Method and apparatus for analyzing a composition of an alloy

1976-03-10

1978-02-21

McGraw, Vincent P.

Optics: measuring and testing

Range or remote distance finding

With photodetection

356 77, 356 79, 356 86, G01J 336, G01J 330

Patent

active

040749363

ABSTRACT:
An alloy to be tested is formed of a basis metal and a plurality of alloying elements. A diffraction spectrum having lines corresponding to the basis metal and to each of the alloying elements is generated from the alloy by sparking and electrical signals each having an intensity proportional to the intensity of a respective one of the lines of the spectrum are formed. Each of these signals is integrated and the integrated signals corresponding to lines of the alloy elements are each compared with the integrated signal corresponding to the line of the basis metal and difference signals are generated. These difference signals are evaluated by being passed through a threshold circuit which sounds an alarm when they lie outside a predetermined range. The device can be calibrated by comparing each of the signals corresponding to one of the alloying elements with only a portion of the signal corresponding to the basis metal so that the arrangement can be set up to generate an output only when the alloy being sampled has a composition different from a predetermined calibrated composition.

REFERENCES:
patent: 2577815 (1951-12-01), Saunderson et al.
patent: 3227038 (1966-01-01), Earle

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