Automatic particle-size analyzer

Details Automatic particle-size analyzer Automatic particle-size analyzer

G - Physics

01

N

73/97

G01N 15/02 (2006.01) B07B 1/22 (2006.01) B07B 1/26 (2006.01) B07B 1/42 (2006.01) B07B 1/46 (2006.01) B07B 13/07 (2006.01)

Patent

CA 1203400

AUTOMATIC PARTICLE-SIZE ANALYZER ABSTRACT OF THE DISCLOSURE The invention is apparatus which can automatically make a screen analysis of a granular material. The heart of the apparatus is a polygonal drum having graded screens on each of the faces except one. This open face serves as a means for introducing a sample into the interior of the drum and for discharging any material larger than the largest screen. A gear motor and crank arrangement serves to longitudinally shake the drum and agitate the sample. A second gear motor indexes the drum from screen to screen after a predetermined shaking time. Each screen fraction is accumulated on an electronic scale with weights being determined by differential weighing. The gear motors are timed by a microprocessor which also receives screen fraction weight inputs and calculates a screen analysis.

453732

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