Patent US4403411A successfully refreshed from Google Patents.
US4403411A
Expired / Lapsed
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Method of forming precious metal electrical contact
Assignee: BRAND-REX WILLIMATIC CT
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Filing: 1981-02-04
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Granted: 1983-09-13
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Expires: 2001-02-04
Abstract
Abstract A precious metal electrical contact dot formed from a ribbon of base metal having one substantially flat side and one cylindrically rounded side has precious metal plated on the rounded side and a central ridge formed on the substantially flat side. A tab is formed by cutting a short length from the end of the ribbon, and the substantially flat side of the tab is resistance-welded to the wall of an electrical socket. The wall may be essentially copper, the base metal essentially nickel, and the precious metal essentially gold. A precious metal, gold, wash may be applied over the tab and adjacent wall surface.
Inventors
- 👤 George A. Patton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:15
CPC Classifications
H; H01; H01R; H01R43/00; H01R43/16; H01R13/00; H01R13/02; H01R13/03; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49204; Y10T29/49208; Y10T29/4921; Y10T29/49211; Y10T29/49213; Y10T29/49218
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
The method of forming a precious metal electrical contact portion on that portion of a blank to be formed into an inner wall of an elongated copper pin-socket box comprising the steps of forming a tab by cutting a short link from the end of a carrier ribbon made of essentially nickel base metal having one surface plated with essentially gold precious metal, resistance welding the base metal to said portion of a blank to be formed into the interior copper wall through at least one ridge formed on the non-plated side of said tab, and coating the tab and surrounding portion of the blank to be formed into a wall area with a precious metal, essentially gold, wash so that no base metal is exposed.
Claim 2
Independent Claim
126 words
The method of forming a precious metal electrical contact portion on that portion of a blank to be formed into an inner wall of an elongated copper pin-socket box comprising the steps of forming a tab by cutting a short link from the end of a carrier ribbon made of essentially nickel base metal having one surface plated with essentially gold precious metal, resistance welding the base metal to said portion of a blank to be formed into the interior copper wall through at least one ridge formed on the non-plated side of said tab, and coating the tab and surrounding portion of the blank to be formed into a wall area with a precious metal, essentially gold, wash so that no base metal is exposed.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-09-12 | 1987-03-14 | 1987-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-09-12 | 1991-03-14 | 1991-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-09-12 | 1995-03-14 | 1995-09-13 | $7700.00 | Window Closed / Lapsed |