Densified braided switch contact

Details Densified braided switch contact Densified braided switch contact

1988-05-26

1990-05-01

Cusick, Ernest G.

Electricity: circuit makers and breakers

Electric switch details

Contact

200273, 200265, 200266, 200267, 200268, 439877, 439887, H01H 120

Patent

active

049220683

ABSTRACT:
An electrical switch assembly is made with a braided electrical conductor having a densified end which has reduced porosity from the braided wire. Preferably, the densified end is formed by squeezing copper wires with a solder matrix to reduce the air in the densified end so that it has over 95% solids. A solder layer is formed between the densified end and the switch element, preferably by using a foil of silver braze which is melted between the densified end and the switch element. In the preferred method of forming the densified end, the solder and copper are heated and squeezed at pressures in the range of 500-750 pounds under a liquid blanket of material to limit copper oxidation.

REFERENCES:
patent: 2806113 (1957-09-01), Romer
patent: 3143626 (1964-08-01), Schreiner et al.
patent: 3895851 (1975-07-01), Bolton et al.
patent: 3973823 (1976-08-01), Stanback et al.
patent: 4314848 (1982-02-01), Todoroki et al.
patent: 4394533 (1983-07-01), Naito
patent: 4447109 (1984-05-01), Habnet, Jr.
patent: 4683358 (1987-07-01), Dittmann

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