US4922068A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Densified braided switch contact
Assignee: Individual
•
Filing: 1988-05-26
•
Granted: 1990-05-01
•
Expires: 2008-05-26
Abstract
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.
Inventors
- 👤 Edmund R. Bangs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:50
CPC Classifications
H; H01; H01H; H01H1/00; H01H1/58; H01H1/5822; H01R; H01R35/00; H01R35/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
76 words
In a switch assembly, the combination comprising: a braided, electrical conductor formed of strands of copper wire to provide a flexible electrical conductor, a switch element for connection to the flexible, electrical conductor, a densified end on the braided conductor for connection to the switch element, said densified end having a solder material therein to provide a reduced porosity from the braided conductor, and a solder layer formed between the densified end and the switch element.
Claim 2
Dependent Claim
76 words
In a switch assembly, the combination comprising: a braided, electrical conductor formed of strands of copper wire to provide a flexible electrical conductor, a switch element for connection to the flexible, electrical conductor, a densified end on the braided conductor for connection to the switch element, said densified end having a solder material therein to provide a reduced porosity from the braided conductor, and a solder layer formed between the densified end and the switch element.
Claim 3
Dependent Claim
19 words
A switch assembly in accordance with claim 1 in which the solder layer comprises a layer of silver braze.
Claim 4
Dependent Claim
27 words
A switch assembly in accordance with claim 2 in which the layer of silver braze was in the form of a foil prior to a melting thereof.
Claim 5
Dependent Claim
31 words
A switch assembly in accordance with claim 1 in which the densified end comprises a solid matrix of silver alloy and copper wire with a density of at least 95% solids.
Claim 6
Dependent Claim
18 words
A switch assembly in accordance with claim 4 in which the switch element is a rotatable switch contact.
Claim 7
Dependent Claim
17 words
A switch assembly in accordance with claim 4 in which the switch element is a terminal bar.
Claim 8
Dependent Claim
21 words
A switch assembly in accordance with claim 4 in which a mechanical fastener connects the densified end to the switch element.
References Cited (Backward Citations)
US2806113A
Cited
US3143626A
Cited
DE1218594B
Cited
BE665693A
Cited
US3895851A
Cited
US3973823A
Cited
US4314848A
Cited
US4394533A
Cited
US4447109A
Cited
US4683358A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-04-30 | 1993-10-30 | 1994-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-30 | 1997-10-30 | 1998-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-30 | 2001-10-30 | 2002-05-01 | $7700.00 | Window Closed / Lapsed |