Warning device of overload or overheat for the electric cords, cables, sockets
US6005484A · kind A · utility
16Cited by
7References
4Claims
0Family size
Inventor
Key dates
| Filing date | Dec 8, 1997 |
| Grant date | Dec 21, 1999 |
| Priority date | — |
| Expiry date | Dec 8, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01K1/143
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A warning device of overload or overheat for the electric cords, cables, sockets comprisng with a, or some warning strips having evident colors at proper location on a PVC power cord, and having heat-sensing layers applied on the warning strips, whereby, when the power cord is overloaded with a large current, the copper wire thereof is gradually heated, and temperature on the PVC power cord is raised accordingly, then the dark heat-sensing layers become transparent gradually, and the colors of the sensing strips appear, so that an effect of detecting whether the electric cord is in overload, or overheat can be achieved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.