Method and apparatus for sorting stones

Details Method and apparatus for sorting stones Method and apparatus for sorting stones

1981-03-31

1983-04-12

Knowles, Allen N.

Classifying, separating, and assorting solids

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

Separating means

209703, 209706, 209942, 209905, 356 30, B07C 500, G01N 2100

Patent

active

043795102

ABSTRACT:
An apparatus for sorting stones contained within a supply reservoir by viewing the stones individually through a microscope includes a pick-up tube having a first opening disposed at one end thereof, the first opening adapted to form a substantially airtight seal with one of the stones. A vacuum source is connected to a second opening disposed at the other end of the pick-up tube, the second opening being in communication with the first opening. The apparatus further includes support apparatus connected to the other end of the pick-up tube for moving the one end of the tube between a first position disposed at a transfer location whereat the one end is exposed to the stones within the supply reservoir, and a second position outside the reservoir whereat the one end is positioned exactly within the field of view of an objective of the microscope such that a stone held adjacent the first opening is disposed precisely at the focal length of the microscope objective.

REFERENCES:
patent: 2338400 (1944-01-01), Bogue
patent: 2354628 (1944-07-01), Whitesell
patent: 3253719 (1966-05-01), Povlacs et al.
patent: 3730342 (1973-05-01), Egan et al.

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