US4552989A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Miniature coaxial conductor pair and multi-conductor cable incorporating same
Assignee: NATIONAL ELECTRIC CONTROL Co A CORP OF
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Filing: 1984-07-24
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Granted: 1985-11-12
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Expires: 2004-07-24
Abstract
Abstract A multi-conductor cable including a plurality of miniature coaxial conductor pairs, each including an inner conductor supported by a very thin tubular layer of solid, relatively stiff dielectic material, surrounded by a much thicker wrapping of dielectric tape having a lower dielectric constant than that of the tubular layer. An outer conductor of multiple strands of wire is helically laid about the dielectric tape wrapping. The tubular layer provides mechanical support for each inner conductor, protecting against breakage due to bending of the individual conductor strands, without significantly increasing either the capacitance or diameter of the coaxial conductor pairs.
Inventors
- 👤 Richard G. Sass
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:43
CPC Classifications
H; H01; H01B; H01B11/00; H01B11/18; H01B11/1834; H01B11/20
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
88 words
A coaxial conductor pair, comprising: (a) an inner electrical conductor: (b) a dielectric system comprising (i) a tubular layer of substantially solid dielectric material, selected from the group consisting essentially of polymeric fluorocarbon, high density polyethylene and mixtures thereof, surrounding said inner conductor in physical contact therewith, and (ii) a wrapping of dielectric tape material, surrounding said tubular layer and having a dielectric constant less than 2 and a radial thickness greater than that of said tubular layer; and (c) an outer electrical conductor surrounding said dielectric system.
Claim 2
Dependent Claim
88 words
A coaxial conductor pair, comprising: (a) an inner electrical conductor: (b) a dielectric system comprising (i) a tubular layer of substantially solid dielectric material, selected from the group consisting essentially of polymeric fluorocarbon, high density polyethylene and mixtures thereof, surrounding said inner conductor in physical contact therewith, and (ii) a wrapping of dielectric tape material, surrounding said tubular layer and having a dielectric constant less than 2 and a radial thickness greater than that of said tubular layer; and (c) an outer electrical conductor surrounding said dielectric system.
Claim 3
Dependent Claim
18 words
The coaxial conductor pair of claim 1 wherein said dielectric tape material is composed of expanded polymeric fluorocarbon.
Claim 4
Dependent Claim
18 words
The coaxial conductor pair of claim 1, further including a dielectric, friction-resistant film surrounding said outer electrical conductor.
Claim 5
Dependent Claim
16 words
The coaxial conductor pair of claim 2 wherein said film is composed of a polyethylene terephthalate.
Claim 6
Dependent Claim
27 words
The coaxial conductor pair of claim 1 wherein said tubular layer has a radial thickness no greater than 40% of the thickness of said inner electrical conductor.
Claim 7
Dependent Claim
25 words
The coaxial conductor pair of claim 1 wherein said wrapping has a radial thickness at least four times the radial thickness of said tubular layer.
Claim 8
Dependent Claim
45 words
The coaxial conductor pair of claim 1, said dielectric system further comprising a second tublar layer of substantially solid dielectric material, selected from the group consisting essentially of polymeric fluorocarbon, high density polyethylene and mixtures thereof, interposed between said wrapping and said outer electrical conductor.
Claim 9
Dependent Claim
22 words
The coaxial conductor pair of claim 7 wherein said wrapping has a radial thickness greater than that of said second tubular layer.
Claim 10
Dependent Claim
128 words
A flexible multi-conductor cable, comprising: (a) a plurality of coaxial conductor pairs, each said coaxial conductor pair having (i) an inner electrical conductor; (ii) a dielectric system including a tubular layer of substantially solid dielectric material, selected from the group consisting essentially of polymeric fluorocarbon, high density polyethylene and mixtures thereof, surrounding said inner conductor in physical contact therewith, and a wrapping of dielectric tape material, surrounding said tubular layer and having a dielectric constant less than 2 and a radial thickness greater than that of said tubular layer; (iii) an outer electrical conductor surrounding said dielectric system; and (iv) a dielectric, friction-resistant film wrapping surrounding said outer electrical conductor; and (b) a tublar cover layer of dielectric material surrounding all of said plurality of coaxial conductor pairs.
Claim 11
Dependent Claim
128 words
A flexible multi-conductor cable, comprising: (a) a plurality of coaxial conductor pairs, each said coaxial conductor pair having (i) an inner electrical conductor; (ii) a dielectric system including a tubular layer of substantially solid dielectric material, selected from the group consisting essentially of polymeric fluorocarbon, high density polyethylene and mixtures thereof, surrounding said inner conductor in physical contact therewith, and a wrapping of dielectric tape material, surrounding said tubular layer and having a dielectric constant less than 2 and a radial thickness greater than that of said tubular layer; (iii) an outer electrical conductor surrounding said dielectric system; and (iv) a dielectric, friction-resistant film wrapping surrounding said outer electrical conductor; and (b) a tublar cover layer of dielectric material surrounding all of said plurality of coaxial conductor pairs.
Claim 12
Dependent Claim
18 words
The flexible cable of claim 9 wherein said coaxial conductor pairs are laid helically within said cover layer.
Claim 13
Dependent Claim
46 words
The flexible cable of claim 9, further comprising a sheath of dielectric friction-resistant film surrounding all of said plurality of coaxial conductor pairs, within said cover layer, and an electrically conductive shield layer interposed between said sheath of dielectric friction resistant film and said cover layer.
Claim 14
Dependent Claim
17 words
The coaxial conductor pair of claim 1 wherein said dielectric tape material is of fibrous polymeric fluorocarbon.
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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) | 1988-11-11 | 1989-05-13 | 1989-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-11 | 1993-05-13 | 1993-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-11 | 1997-05-13 | 1997-11-12 | $7700.00 | Window Closed / Lapsed |