US3864509A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coaxial cable whose dielectric partly consists of air
Assignee: US Philips Corp
•
Filing: 1974-01-04
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Granted: 1975-02-04
•
Expires: 1994-01-04
Abstract
Abstract A longitudinally watertight coaxial cable whose dielectric consists partly of air, including spacer filaments of synthetic resin which are located about the central conductor in accordance with spatial wavelines and which are interconnected at regular spaces over a short distance, and thus jointly surround the entire circumference of the conductor.
Inventors
- 👤 Hubertus Johannes Jose Gommans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:05
CPC Classifications
H; H01; H01B; H01B11/00; H01B11/18; H01B11/1834
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
70 words
A coaxial cable having a dielectric which consists partly of air in which filaments of electrically insulating material serving as spacers around a central conductor, wherein the spacers consist of at least two filaments of electrically insulating material which surround the central conductor in accordance with spatial wavelines and which are interconnected at regular spaces over a short distance and thus jointly surround the entire circumference of the central conductor.
Claim 2
Dependent Claim
70 words
A coaxial cable having a dielectric which consists partly of air in which filaments of electrically insulating material serving as spacers around a central conductor, wherein the spacers consist of at least two filaments of electrically insulating material which surround the central conductor in accordance with spatial wavelines and which are interconnected at regular spaces over a short distance and thus jointly surround the entire circumference of the central conductor.
Claim 3
Dependent Claim
55 words
A coaxial cable as claimed in claim 1, wherein the spatial wavelines are symmetrical with respect to a plane passing through the axis of the central conductor, and each filament surrounds the cylinder constituted by the central conductor over half its circumference, the filaments being connected together at the areas where they touch each other.
Claim 4
Dependent Claim
57 words
A coaxial caBle as claimed in claim 1, wherein the filaments, consisting of thermoplastic synthetic resin, are deformed at the area of the connection so as to fill up the space between the central conductor and an outer conductor or tube of electrically insulating material which is surrounded by an outer conductor at the area of connection.
Claim 5
Dependent Claim
68 words
A coaxial cable as claimed in claim 1, wherein said filaments are formed of a water impermeable material, said cable comprises in addition a tube of water impermeable material surrounding said spacer filaments and in water-tight contact therewith, said filaments at the areas of interconnection being shaped so as to form a water-tight seal between said tube and said central conductor, whereby said cable is made longitudinally water-tight.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-03 | 1978-08-05 | 1979-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-03 | 1982-08-05 | 1983-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-03 | 1986-08-05 | 1987-02-04 | $7700.00 | Window Closed / Lapsed |