Sub-marine telephone cable
US4349694A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 4, 1978 |
| Grant date | Sep 14, 1982 |
| Priority date | — |
| Expiry date | Aug 4, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01B11/1808
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The coaxial sub-marine telephone cable employs a central conductor which is formed by a compound twisted core of high tensile steel wires and of aluminum-based wires which are encased in a longitudinally welded copper tube that is applied tightly around the twisted core. The aluminum-based wire has high tensile strength, high breaking elongation and good electrical conductivity. The crushing of the aluminum based wires by the steel wires under the effect of radial pressures exerting on the core through sizing dyes while being manufactured is minimized and avoided by arranging the steel wires in contact with each other under radial compression so that they interact as an arch or vault.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.