US4301428A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio frequency interference suppressor cable having resistive conductor and lossy magnetic absorbing material
Assignee: D'APPLICATION DES FERRITES MUSORB SA Ste
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Filing: 1979-09-26
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Granted: 1981-11-17
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Expires: 1999-09-26
Abstract
Abstract At least one conductive element combined with a magnetic absorbing mixture surrounding at least part of the conductor has a composite structure: a core is formed by a filament or fiber (rayon, nylon, glass) and a conductive coating (metal or metallic glass). There is so provided a high resistance element, with good mechanical properties and a great absorption of high frequencies. Applications: antiparasitic cables for ignition of internal combustion engines, instrumentation and low-pass cables, coaxial cables, shields and screens.
Inventors
- 👤 Ferdy Mayer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:37
CPC Classifications
H; H05; H05K; H05K9/00; H05K9/0073; H05K9/0098; H01; H01B; H01B11/00; H01B11/02; H01B11/06; H01B11/12; H01B11/14; H01B11/146; H01B11/18; H01B11/1895; H01B7/00; H01B7/0054; H01B7/0063
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
64 words
An electric lossy element of the electric wire, cable or screen type, comprising: at least one conductive element, said conductive element being a composite structure including a non-conductive core of the textile, plastic or glass type coated with a thin conductive metallic layer; and a magnetic absorbing mixture at least partially surrounding said at least one conductive element, said magnetic absorbing mixture being non-conductive.
Claim 2
Dependent Claim
64 words
An electric lossy element of the electric wire, cable or screen type, comprising: at least one conductive element, said conductive element being a composite structure including a non-conductive core of the textile, plastic or glass type coated with a thin conductive metallic layer; and a magnetic absorbing mixture at least partially surrounding said at least one conductive element, said magnetic absorbing mixture being non-conductive.
Claim 3
Dependent Claim
15 words
Electric element according to claim 1, wherein the conductive coating is formed by chemical deposit.
Claim 4
Dependent Claim
17 words
An electric element according to claim 1, wherein the conductive coating is formed by gaseous phase techniques.
Claim 5
Dependent Claim
17 words
An electric element according to claim 1, wherein the conductive coating is formed by liquid phase techniques.
Claim 6
Dependent Claim
19 words
An electric element according to claim 1, wherein said conductive element comprises an assembly of filaments forming a cable.
Claim 7
Dependent Claim
19 words
An electric element according to claim 1, wherein said conductive element comprises an assembly of filaments forming a braid.
Claim 8
Dependent Claim
19 words
An electric element according to claim 1, wherein said conductive element comprises an assembly of filaments forming a tape.
Claim 9
Dependent Claim
53 words
Electric element according to claim 1, wherein the core of the conductive element is formed by a filament or fiber the diameter of which is comprised between about 1 and 100μ, the conductive coating having a reduced thickness regarding to the diameter, the conductive coating thickness being comprised between about 0.02 and 20μ.
Claim 10
Dependent Claim
31 words
Electric element according to claim 8 wherein the conductive coating is formed by a non magnetic metal or alloy, providing a resistance practically equal to the resistance for a direct current.
Claim 11
Dependent Claim
37 words
Electric element according to claim 8, wherein the conductive coating is formed by a magnetic metal having a skin thickness less than that of a non-magnetic conductive layer, providing a selective resistance in the range of frequencies.
Claim 12
Dependent Claim
16 words
Electric element according to claim 2, wherein the conductive coating has a resistance sensitive to temperature.
Claim 13
Dependent Claim
20 words
Electric element according to claim 1 characterized in that said conductive element comprises an assembly of filaments forming a strand.
Claim 14
Dependent Claim
17 words
Electric element according to claim 12, wherein the assembly of filaments is of a round cross section.
Claim 15
Dependent Claim
18 words
An electric element according to claim 12, wherein the assembly of filaments is of a flattened cross section.
Claim 16
Dependent Claim
63 words
A radio frequency interference suppressor cable, comprising: at least one conductive element; and a magnetic absorbing mixture, said mixture at least partially surrounding said at least one conductive element; wherein said at least one conductive element includes a plurality of non-conductive fibers, each of said plurality of fibers being coated with a thin conductive metallic layer, said plurality of fibers being grouped together.
Claim 17
Dependent Claim
63 words
A radio frequency interference suppressor cable, comprising: at least one conductive element; and a magnetic absorbing mixture, said mixture at least partially surrounding said at least one conductive element; wherein said at least one conductive element includes a plurality of non-conductive fibers, each of said plurality of fibers being coated with a thin conductive metallic layer, said plurality of fibers being grouped together.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-11-16 | 1985-05-18 | 1985-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-16 | 1989-05-18 | 1989-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-16 | 1993-05-18 | 1993-11-17 | $7700.00 | Window Closed / Lapsed |