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James Francis Hutter and Leonard Kelly received US Patent No. 3,701,419 on October 31, 1972, filed November 6, 1969. It was assigned to Sphere Investments Ltd.
The patent's abstract:
In the machine sorting of objects which have a material with magnetic properties, an auxiliary magnetic field is provided in the sorting zone to enhance a magnetic characteristic of the material with magnetic properties. In one embodiment the objects are passed through a strong, steady magnetic field just prior to passing a magnetic field detector. The magnetic field detector provides a sorting signal related to remanence of the objects, and the objects are deflected or not in accordance with the sorting signal.
- Author
- James Francis Hutter; Leonard Kelly
- Published by
- US Patent Office
- Series
- US Patent No. 3,701,419
- Date
- October 31, 1972
- Library no.
- ACL Doc 23096 · asbestosclaims.law/library/23096
- Rights
- US government work, in the public domain.
Read or download
Read online Download the PDF PDF · 11 pages · 1.1 MB
Where it was listed
- Asbestos, April 1973, in its patents department (the year's issues)
Cite this document
James Francis Hutter, Leonard Kelly. “Method of and apparatus for sorting ores (US Patent 3,701,419, 1972).” October 31, 1972. US Patent No. 3,701,419. US Patent Office. AsbestosClaims.Law Library, ACL Doc 23096. https://asbestosclaims.law/library/23096.
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