Mine communication cable and method for use
US5146611A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 17, 1987 |
| Grant date | Sep 8, 1992 |
| Priority date | — |
| Expiry date | Nov 17, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B13/02
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A mine emergency communication cable and a method for use. The cable is comprised of a plurality of brightly colored, lightweight, strong synthetic fibers having a plurality of noninsulated tin plated copper wires and stainless steel wires at least one insulated copper wire interwoven with the synthetic fibers. At least two transceivers are inductively coupled to the cable creating a radio communication link. The noninsulated wires allow pieces of the cable to be connected by tying a knot in the cable. The insulated wire increases the communication distance by supporting the bifilar radio communication mode. The cable can also function as a physical guide which miners can follow to a safe location during a mine emergency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.