US3686746A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Closing wire terminals
Assignee: Contacts Inc
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Filing: 1970-06-09
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Granted: 1972-08-29
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Expires: 1990-06-09
Abstract
Abstract It is required that the open groove on the rounded portion of wire terminals, to which the wire is attached, be brazed shut or otherwise permanently filled. In accordance with this invention, a brass or copper wire terminal is plated with a very thin layer of silver, tin, or both. The surface is thereafter oxidized by heating in air. The assembly is then heated in a reducing atmosphere and, by virtue of eutectic brazing, an excellent metallurgical bond fills the groove. No solder or brazing alloys are used. This invention is a refinement of the bonding process disclosed in U.S. Pat. application Ser. No. 873,721 filed Nov. 3, 1969.
Inventors
- 👤 Childress B Gwyn Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:13
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/001; B23K1/00; B23K1/012; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49204; Y10T29/49208; Y10T29/4921; Y10T29/49211; Y10T29/49213
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
22 words
The method as claimed in claim 1, wherein said plating is no more than about three ten thousandths of an inch thick.
Claim 2
Dependent Claim
19 words
The method as claimed in claim 1, wherein said oxidation is carried out for about 30 minutes in air.
Claim 3
Dependent Claim
31 words
The method as claimed in claim 1, wherein said plating is tin, and said heating in a reducing atmosphere is at a temperature in the range of 500* to 1,200* F.
Claim 4
Dependent Claim
31 words
The method as claimed in claim 1, wherein said plating is silver, and said heating is a reducing atmosphere is at a temperature in the range of 1,350* to 1,600* F.
Claim 5
Dependent Claim
34 words
The method as claimed in claim 1, wherein said plating is both tin and silver, and said heating in a reducing atmosphere is at a temperature in the range of 800* to 1,500* F.
Claim 6
Dependent Claim
20 words
The method as claimed in claim 1, wherein said heating in a reducing atmosphere is completed within about ten minutes.
Claim 7
Dependent Claim
29 words
The method as claimed in claim 1 and additionally comprising coating said terminal with a thin layer of a parting compound prior to said heating in a reducing atmosphere.
References Cited (Backward Citations)
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Cited
US2294482A
Cited
GB540961A
Cited
US2398449A
Cited
GB568659A
Cited
US2685076A
Cited
US2759161A
Cited
US2816275A
Cited
GB847373A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |