Process for the production of chains and other ornamental items

Details Process for the production of chains and other ornamental items Process for the production of chains and other ornamental items

1989-05-23

1991-01-22

Jones, David

Chain, staple, and horseshoe making

Chain making

Loop interlocked

59 351, 59 78, 59 80, 59 83, 291606, 29517, 29520, B21L 300

Patent

active

049860674

ABSTRACT:
A process for the production of an elongated composite member of circular cross section, comprising producing a hollow metal tube having an inside diameter, inserting in the hollow tube an elongated core of circular cross section of a light-weight, tough and ductile material having an outer diameter substantially smaller than the internal diameter of the tube, and reducing the diameter of the tube until said tube is firmly bonded to the outer surface of the core. Thereafter, the diameter of the tube and core together is reduced. The core is of aluminum and the tube is of copper alloy. The composite thus produced is formed into a jewelry chain and then gold plated.

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patent: 1610225 (1926-12-01), Metcalf
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patent: 2425299 (1947-08-01), Ballou, Jr.
patent: 3949466 (1976-04-01), O'Brien et al.
"Metals and How to Weld Them", Jefferson and Woods, June, 1977, p. 90.
H. Bennett, F.A.I.C., "Concise Chemical and Technical Dictionary", 1974, p. 161.
G. Hawley, "The Condensed Chemical Dictionary", p. 122, Ninth Edition.

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