Classifying – separating – and assorting solids – Sorting special items – and certain methods and apparatus for... – Condition responsive means controls separating means
Patent
1988-02-23
1990-03-27
Pedder, Dennis H.
Classifying, separating, and assorting solids
Sorting special items, and certain methods and apparatus for...
Condition responsive means controls separating means
209585, 356385, B07C 510, G01B 1110
Patent
active
049113070
ABSTRACT:
A machine for measuring the size of objects that are in motion in single file includes in one embodiment a collimated light beam that as a narrow horizontal width and a long vertical width. The light beam is pulsed ON and OFF at a 10 kilohertz rate but with the light being turned on only 30 percent of the time. The maximum shadow is cast by the maximum height of the object, and causes a minimum oputput voltage amplitude from a photodetector. This minimum output voltage is compared with a reference voltage to determine the object size. A direct digital readout may be obtained. Also, the size information may be passed to a microprocessor or similar device for use in sorting operations. In another embodiment a pair of collimated light beams are positioned about an aperture such that the beams are othogonal. An object passing through the aperture causes a loss of light to each photodetector. The voltage output of each photodetector is combined and averaged. The peak value of the average is used to determine the object size.
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Accupack Systems
Pedder Dennis H.
Wacyra Edward M.
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