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Patent US3821692A successfully refreshed from Google Patents.
US3821692A
Expired / Lapsed
US
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Slotted electrical connector of copperbased alloy separated from an indium coating by a barrier layer
Assignee: AT&T Inc
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Filing: 1972-10-19
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Granted: 1974-06-28
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Expires: 1992-10-19
Abstract
Abstract Means are disclosed to maintain the long-life resistance characteristics of contacts used in solderless connectors and fabricated from indium plated, copper based alloy. A barrier layer is plated between the alloy of the contact and the indium layer beneficially used with aluminum conductor wire.
Inventors
- 👤 R Barnard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:40
CPC Classifications
H; H01; H01R; H01R4/00; H01R4/24; H01R4/2416; H01R4/2445; H01R4/245; H01R4/2454; H01R4/58; H01R4/62
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
21 words
A connector in accordance with claim 1 wherein the layer of metal comprises nickel between 0.00007 and 0.00012 inches in thickness.
Claim 2
Dependent Claim
132 words
A connector for making electrical connection to at least one bare or insulated wire, the connector being of the type including means for positioning wire to be connected, an indium plated contact of copper-based material having at least one wire receiving slot for wire to be connected, and means for mating with the positioning means to force said wire into said slot so that electrical connection is established to the conductors of the wire, wherein the improvement comprises a barrier layer of metal positioned between the contact and the indium plating, thereby maintaining electrical continuity between the contact and the indium while preventing interdiffusion and alloying between the copper of the contact and the indium wherein the layer of metal is selected from the group consisting of aluminum, iron, lead and nickel.
Claim 3
Dependent Claim
21 words
A connector in accordance with claim 3 wherein the layer of metal comprises nickel between 0.00007 and 0.00012 inches in thickness.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-27 | 1981-12-27 | 1982-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-27 | 1985-12-27 | 1986-06-28 | $7700.00 | Window Closed / Lapsed |