Cable assembly for detecting the ingress of water inside a cable
US4386231A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 28, 1981 |
| Grant date | May 31, 1983 |
| Priority date | — |
| Expiry date | Apr 28, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01B7/322
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A cable assembly for detecting the ingress of water inside a cable is disclosed. The cable assembly comprises a moisture detecting tape constructed of two parallel bare conductors laminated to an insulating substrate. The tape thus constructed is applied in an open helix around the conductor core of a cable. A suitable plastic jacket is extruded over the cable core and the moisture detecting tape. A shielding tape may also be applied over the cable core and the moisture detecting tape prior to extrusion of the overall plastic jacket. The cable thus constructed with the integral moisture detecting tape is adapted for connection to a suitable sensing apparatus at one end, and should moisture enter the cable as a result of damage to same, the electrical characteristics of the detecting tape would change and such change will result in a measurable conductance between the conductors of the moisture detecting tape. The ingressing water is thus sensed prior to penetrating and compromising the cable core. Standard bridge techniques are employed to determine the distance of the fault from the ends of the cable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.