Method and apparatus for sampling and measuring a characteristic

Details Method and apparatus for sampling and measuring a characteristic Method and apparatus for sampling and measuring a characteristic

1976-04-19

1979-12-25

McGraw, Vincent P.

Optics: measuring and testing

Of light reflection

356 38, 250576, 250574, G01N 2148, G01N 100, G01N 2126

Patent

active

041803310

ABSTRACT:
A method and apparatus for sampling and optically measuring a selected characteristic of flowing granular material in which an optical window located at one end of a hollow sight tube is disposed in the material stream at an angle with respect thereto. A dam is carried by the sight tube downstream of the window to retard material flow and cause material to collect on the window surface. The selected material characteristic may then be measured as a function of an optical characteristic of the material as viewed through the sight tube and window. An air nozzle is disposed adjacent the window to remove the collected material sample at the end of a measurement sequence.

REFERENCES:
patent: 3430606 (1969-03-01), Pease et al.
patent: 3665201 (1972-05-01), Shea et al.
patent: 3714444 (1973-07-01), Carr et al.
patent: 3776642 (1973-12-01), Anson
patent: 3818333 (1974-06-01), Walker
patent: 3903877 (1975-09-01), Terada
patent: 4024407 (1977-05-01), Meric et al.

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