US3601645A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical contact brushes
Assignee: Morganite Carbon Ltd
•
Filing: 1969-05-16
•
Granted: 1971-08-24
•
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 01:00
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.
References Cited (Backward Citations)
US661669A
Cited
US764391A
Cited
US1067003A
Cited
US1053881A
Cited
US1633815A
Cited
US1712477A
Cited
US1708192A
Cited
US2098062A
Cited
US2092627A
Cited
US2319240A
Cited
US2353047A
Cited
US2989490A
Cited
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 |