Luminaire incorporating containment in the event of non-passive failure of high intensity discharge lamp
US6457845B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 6, 2000 |
| Grant date | Oct 1, 2002 |
| Priority date | — |
| Expiry date | Jan 11, 2021 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21V25/12
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A metal halide gas discharge lamp (12) luminaire (10) includes an acrylic lens (22). The metal halide lamp (12) is subject to non-passive failure whereby not particles of quartz or ceramic arc tube (28) material and tungsten electrode (32, 34) material fall as hot (e.g. 1100 ° C.) debris. The interior, upper surface (24) of the lens (22) is ignition-resistant and, in exemplary embodiments, comprises a thin coating (44). In the event of non-passive failure of the lamp (12), hot debris particles fall on to the acrylic lens (22). Not only is there no flame, but hot debris particles do not sink into the material of the acrylic lens. Thus, containment is maintained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.