Electric cable having high propagation velocity
US5286923A · kind A · utility
73Cited by
7References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 13, 1991 |
| Grant date | Feb 15, 1994 |
| Priority date | — |
| Expiry date | Nov 13, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01B7/0241
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
One embodiment comprises: PA1 two bare parallel conductors made of bronze; PA1 two insulating rods that are substantially helically wound with non-touching turns around the conductors respectively so that the rods interfit and maintain a predetermined distance between the two conductors; and PA1 an insulating protective sheath. The helical pitch of the rods is much greater than the cross-section of the rods so the volume between the two conductors is mostly full of air, thereby obtaining reduced permittivity and thus increased propagation velocity. The invention is applicable to data transmission cables for computer machines.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.