Communications cables with oppositely twinned and bunched insulated conductors
US6770819B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 12, 2002 |
| Grant date | Aug 3, 2004 |
| Priority date | — |
| Expiry date | Feb 12, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01B11/005
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A communications cable comprises an elongate cable jacket having an internal cavity and a plurality of twisted pairs of insulated conductors disposed in the internal cavity of the cable jacket, each of the conductors being insulated with a polymeric layer. Each of the insulated conductors within each of the twisted pairs of conductors defines a twinning helix having a first rotative direction, and each of the twisted pairs defines a bunching helix having a second rotative direction, the second rotative direction being opposite that of the first rotative direction. In this configuration, the communications cable can provide acceptable crosstalk and attenuation performance, even with foamed insulators that have demonstrated unacceptable performance when twinned and bunched in the same rotative direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.