Classifying – separating – and assorting solids – Sorting special items – and certain methods and apparatus for... – Condition responsive means controls separating means
Patent
1979-03-21
1981-07-28
Knowles, Allen N.
Classifying, separating, and assorting solids
Sorting special items, and certain methods and apparatus for...
Condition responsive means controls separating means
209585, 209655, 250222R, 356341, 356342, B07C 5342
Patent
active
042806259
ABSTRACT:
The invention relates to the measurement of the shade of a particle. The particle is illuminated with light of variable intensity and viewed against a background level of illumination. A measurement is made of the ratio of time for which the intensity of light from the particle exceeds the intensity of the background to obtain a measurement of the shade of the particle.
REFERENCES:
patent: 3189178 (1965-06-01), Calleson et al.
patent: 3543925 (1970-12-01), Loughery
patent: 3750882 (1973-08-01), Hays
patent: 3782544 (1974-01-01), Perkins
patent: 3886354 (1975-05-01), Swiden
Chatterley Samuel
Colson Richard N.
Grobbelaar Jacobus H.
Levitt Charlie M.
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