Production of metal-plated areas on selected interior portions o

Details Production of metal-plated areas on selected interior portions o Production of metal-plated areas on selected interior portions o

1985-03-18

1986-09-23

Goldberg, Howard N.

Metal working

Method of mechanical manufacture

Electrical device making

72 47, 204 15, H01R 4300

Patent

active

046127038

ABSTRACT:
A method is disclosed for producing a small-diameter metal tube having a coating of a different metal on selected portions of its inner surface, the tube being used for the body of a plunger-type electrical contact. A flat piece of metal from which the tube is to be made is coated with a predetermined pattern of a second metal on at least one preselected portion of its surface, then the flat piece is subjected to deep drawing operations to produce a tube coated with a predetermined pattern of the second metal on preselected portions of its interior surface.

REFERENCES:
patent: 2206662 (1940-07-01), Conradi et al.
patent: 3435168 (1969-03-01), Cooney
patent: 3747210 (1973-07-01), Kroll
patent: 4351174 (1982-09-01), Bauer et al.
patent: 4397519 (1983-08-01), Cooney
patent: 4403411 (1983-09-01), Patton
patent: 4521257 (1985-06-01), Gevatter et al.

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