Heat trace signal light
US10278265B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 29, 2016 |
| Grant date | Apr 30, 2019 |
| Priority date | — |
| Expiry date | Jul 19, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B45/20
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An improved signal light unit for heat trace cables includes an energy storage device that stores energy during normal operation of the heat trace cable. During the normal operation, the light source of the signal light unit has a first illumination status. When there is a fault or other type of interruption in the electrical power in the heat trace cable, the energy storage device can discharge to power the light source. The light source can be illuminated in a different manner when it is powered by the energy storage device than during normal operation. Keeping the light energized in this manner when there is a fault in the heat trace cable and, moreover, making the light illuminate differently when there is a fault compared to normal operation, will facilitate inspection of the facility in which the heat trace cable is installed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.