Ceramic HID lamp with special frame wire for stabilizing the arc
US6844676B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 1, 2001 |
| Grant date | Jan 18, 2005 |
| Priority date | — |
| Expiry date | Oct 1, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J61/36
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A high-pressure discharge lamp of the ceramic metal halide type having power ranges of about 150 W to about 1000 W. Such lamps have outer bulb enclosing a cylindrical ceramic discharge vessel enclosing a discharge space. The discharge vessel includes an ionizable material containing a metal halide; a first and second discharge electrode feedthrough; and a first and second current conductor connected to the first and second discharge electrode feedthrough, respectively. A frame wire structure includes at least one frame wire, connected to the current conductors, through a conductor. The frame wire structure extends between the ceramic discharge vessel and the glass bulb, and is effective to reduce arc bending, regardless of the orientation of the lamp during operation in a fixture and regardless of the relative position of the frame wire to the arc tube.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.