Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1975-06-30
1976-04-20
Smith, Alfred E.
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
73432PS, 250576, 356102, G01N 2126
Patent
active
039522075
ABSTRACT:
Method and means for determining the particle size distribution in a flow of granular material in the particle size range of 1 .mu.m to several millimeters by introducing into a constant velocity stream of a carrier medium, preferably transversely thereof, a stream of the material to be analyzed, said introduction being effected at a constant velocity within a measuring time period, and the velocities of said two streams being so coordinated as to cause the individual particle size classes to be carried along separate particle paths in a fan-shaped pattern while being subjected to an electromagnetic radiation, and determining the particle quantities corresponding to the individual particle size classes in the fan-shaped stream of material from the extinction or absorption of said electromagnetic radiation.
REFERENCES:
patent: 3225296 (1965-12-01), Roth
patent: 3315066 (1967-04-01), Muta et al.
patent: 3377597 (1968-04-01), Muta
patent: 3449567 (1969-06-01), Oliver et al.
patent: 3739180 (1973-06-01), Carlson
"A New X-Ray Sedimentometer", Allen et al., Journal of Physics E: Scientific Instruments, 1970, V. 30
Leschonski Kurt
Rumpf Hans
Nelms D. C.
Smith Alfred E.
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