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Patent US3601645A successfully refreshed from Google Patents.
US3601645A
Expired / Lapsed
US
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Electrical contact brushes
Assignee: Morganite Carbon Ltd
•
Filing: 1969-05-16
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Granted: 1971-08-24
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Expires: 1989-05-16
Abstract
Abstract An electrical brush comprises a metal-and-carbon containing body and a metallic layer to which an electrical conductor is or may be secured and electrically connected. The metal-and-carbon containing body is sintered with the metallic layer in an area which is greater than the area at the connection of the electrical conductor to the layer.
Inventors
- 👤 Colin Whiteheart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:10
CPC Classifications
H; H01; H01R; H01R39/00; H01R39/02; H01R39/36; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49119
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
54 words
An electrical brush comprising a metal-and-carbon containing body, a metallic layer sintered with said body, said metallic layer comprising a metal other than any ingredient of said body, and electrical conductor means secured to said metallic layer and electrically connected therewith, said metallic layer having a greater tensile strength than that of said body.
Claim 2
Dependent Claim
54 words
An electrical brush comprising a metal-and-carbon containing body, a metallic layer sintered with said body, said metallic layer comprising a metal other than any ingredient of said body, and electrical conductor means secured to said metallic layer and electrically connected therewith, said metallic layer having a greater tensile strength than that of said body.
Claim 3
Dependent Claim
35 words
An electrical brush according to claim 1 wherein the surface area of contact at the interface between said metallic layer and said body is greater than that between said metallic layer and said conductor means.
Claim 4
Dependent Claim
26 words
An electrical brush according to claim 1 wherein said conductor means comprises a flexible electrical conductor, said flexible conductor being secured integrally to said metallic layer.
Claim 5
Dependent Claim
16 words
An electrical brush according to claim 1 wherein said metallic layer consists essentially of a metal.
Claim 6
Dependent Claim
12 words
An electrical brush according to claim 4 wherein said metal is iron.
Claim 7
Dependent Claim
13 words
An electrical brush according to claim 1 wherein said metallic layer comprises copper.
Claim 8
Dependent Claim
17 words
An electrical brush according to claim 1 wherein said metallic layer consists essentially of a metal alloy.
Claim 9
Dependent Claim
20 words
An electrical brush according to claim 1 wherein said metallic layer consists essentially of a mixture of copper and iron.
Claim 10
Dependent Claim
36 words
An electrical brush according to claim 1 wherein said body is a composition essentially of copper and graphite in the range of from 25 percent copper, 75 percent graphite to 95 percent copper, 5 percent graphite.
Claim 11
Dependent Claim
64 words
AN electrical brush comprising a body of sintered metal-and-carbon; a sintered metallic material layer, said metal-and-carbon of said body being cosintered with the metallic material of said layer, said metallic material layer comprising a metal other than any ingredient of said body; and electrical conductor means secured to said layer and electrically connected therewith, said layer having a greater tensile strength than said body.
Claim 12
Dependent Claim
64 words
AN electrical brush comprising a body of sintered metal-and-carbon; a sintered metallic material layer, said metal-and-carbon of said body being cosintered with the metallic material of said layer, said metallic material layer comprising a metal other than any ingredient of said body; and electrical conductor means secured to said layer and electrically connected therewith, said layer having a greater tensile strength than said body.
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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) | 1974-08-23 | 1975-02-22 | 1975-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-23 | 1979-02-22 | 1979-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-23 | 1983-02-22 | 1983-08-24 | $7700.00 | Window Closed / Lapsed |