Cable consisting of three bundles each having three strands
US4319072A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 13, 1980 |
| Grant date | Mar 9, 1982 |
| Priority date | — |
| Expiry date | Aug 13, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01B11/04
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In a cable consisting of three bundles each having three strands each bundle is rotated by 60.degree. in each of two consecutive longitudinal sections, no rotation occurring in the third section. The sections without rotation are displaced by one section for each bundle. Therefore, a close coupling of the strand of a bundle to all strands of the other bundles and a phantom surge impedance which only slightly differs from the surge impedance of the bundle are achieved. In addition, the bundles are twisted. The cable is suited for the simultaneous push-pull transmission of a maximal ten independent, binary signals in both directions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.