Stock material or miscellaneous articles – All metal or with adjacent metals – Composite; i.e. – plural – adjacent – spatially distinct metal...
Patent
1995-01-13
1995-12-05
Zimmerman, John
Stock material or miscellaneous articles
All metal or with adjacent metals
Composite; i.e., plural, adjacent, spatially distinct metal...
428675, 40 275, B32B 1520
Patent
active
054727960
ABSTRACT:
There is provided a metallic composite useful for coinage. The core is formed from a copper alloy that contains between 50% and 99.0% copper, has a room temperature electrical conductivity in excess of 25% IACS an initial yield strength in excess of 10,000 psi and a dynamic softening response onset at a temperature in the range of 200.degree. C.-400.degree. C. The cladding layers have an initial yield strength more than that of the core and a gold color. The strengthening response of the core during cladding is similar to that of the cladding layers making the metallic composites resistant to corrugation. Reducing corrugation increases the sensitivity of electromagnetic coin discriminators.
REFERENCES:
patent: 3381364 (1968-05-01), Winter
patent: 3516804 (1970-06-01), Trapp et al.
patent: 3634890 (1972-01-01), Conradt et al.
patent: 3721535 (1973-03-01), Pryor et al.
patent: 4292377 (1981-09-01), Petersen et al.
patent: 4330599 (1982-05-01), Winter et al.
patent: 4361218 (1982-11-01), Van Dort
patent: 4398626 (1983-08-01), Barnes
patent: 4401488 (1983-08-01), Prinz et al.
patent: 4429022 (1984-01-01), Breedis et al.
patent: 4436790 (1984-03-01), Prinz et al.
patent: 4505060 (1985-03-01), Bell et al.
patent: 4644674 (1987-02-01), Burrows et al.
patent: 5094922 (1992-03-01), Ielpo et al.
"Steel-Rolling Technology--Theory and Practice" by Vladimir B. Ginzburg. Marcel Dekker, Inc. (1989) "Principles of Microscopic Plasticity" at pp. 199-208. No Month.
Breedis John F.
Tyler Derek E.
Olin Corporation
Rosenblatt Gregory S.
Zimmerman John
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