Patent US1066565A successfully refreshed from Google Patents.
US3971880A
Expired / Lapsed
US
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Phase stable transmission cable
Assignee: Kaman Sciences Corp
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Filing: 1975-08-04
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Granted: 1976-07-27
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Expires: 1995-08-04
Abstract
Abstract A cable for high frequency use in an environment with high and varying thermal changes whereby the thermal expansion of the cable is controlled by having a highly electrically conductive metal bonded to a metal of low coefficient of thermal expansion relative to the high electrically conductive metal. This is accomplished by providing a thin layer of highly electrically conductive metal over an inner core of a metal of low coefficient of thermal expansion. The cable can also utilize a similar bonded metal configuration for an outer concentric conductive sheath having a mineral dielectric between conductors that also has a low coefficient of thermal expansion.
Inventors
- 👤 Dewey F. Harris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:36
CPC Classifications
H; H01; H01B; H01B7/00; H01B7/17; H01B7/18; H01B7/22; H01B7/221; H01B11/00; H01B11/18; H01B11/1808; H01B11/1834
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A high temperature electrical length stable radio frequency cable comprising a center conductor, a spaced concentric conductive sheath and a dielectric insulating medium between said sheath and the center conductor wherein the sheath conprises a hollow tubular member of a metal or metal alloy of low coefficient of thermal expansion with a relatively thin layer of low electrical resistivity metal bonded to the inside thereof and wherein the dielectric material is selected from the group consisting of silica, magnesia and alumina.
Claim 2
Dependent Claim
81 words
A high temperature electrical length stable radio frequency cable comprising a center conductor, a spaced concentric conductive sheath and a dielectric insulating medium between said sheath and the center conductor wherein the sheath conprises a hollow tubular member of a metal or metal alloy of low coefficient of thermal expansion with a relatively thin layer of low electrical resistivity metal bonded to the inside thereof and wherein the dielectric material is selected from the group consisting of silica, magnesia and alumina.
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) | 1979-07-27 | 1980-01-26 | 1980-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-27 | 1984-01-26 | 1984-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-27 | 1988-01-26 | 1988-07-27 | $7700.00 | Window Closed / Lapsed |