Stock material or miscellaneous articles – All metal or with adjacent metals – Having composition – density – or hardness gradient
Patent
1984-09-21
1987-04-14
Sheehan, John P.
Stock material or miscellaneous articles
All metal or with adjacent metals
Having composition, density, or hardness gradient
428611, 428627, 428679, 428928, 428937, 428900, B22D 2500
Patent
active
046578234
ABSTRACT:
A ring is formed having alternating segments of ferromagnetic and paramagnetic materials. The ring is formed by first providing an annular ring of a high strength magnetic steel. Teeth are formed on the outer surface of the ring by forming troughs of the ferromagnetic material. Low pressure plasma deposition is used to fill in the troughs with a high strength paramagnetic material. The excess steel and excess plasma deposited material is removed to leave the finished ring of alternating segments of ferromagnetic and paramagnetic material.
REFERENCES:
patent: 2140534 (1938-12-01), Mahoney
patent: 2519918 (1950-08-01), Merrill
patent: 2767464 (1956-10-01), Nack et al.
patent: 3668951 (1972-06-01), Talmage
patent: 3843334 (1974-10-01), Cromwell
Jackson Melvin R.
Kopp Robert W.
Siemers Paul A.
Davis Jr. James C.
General Electric Company
Rochford Paul E.
Sheehan John P.
Webb II Paul R.
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