Automatic particle-size analyzer

Details Automatic particle-size analyzer Automatic particle-size analyzer

1983-05-09

1984-12-11

Reeves, Robert B.

Classifying, separating, and assorting solids

Sorting special items, and certain methods and apparatus for...

Signalling, indicating, or display means

209408, 209683, B07B 1307

Patent

active

044873239

ABSTRACT:
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 door 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 friction weight inputs and calculates a screen analysis.

REFERENCES:
patent: 3750884 (1973-08-01), Satake
patent: 4030606 (1977-06-01), Smith et al.
patent: 4043901 (1977-08-01), Gauld
patent: 4141451 (1979-02-01), Lapoint

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