Low-pressure mercury vapor discharge lamp with amalgam capsule having amalgam chamber
US7990041B2 · kind B2 · utility
3Cited by
4References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 5, 2008 |
| Grant date | Aug 2, 2011 |
| Priority date | — |
| Expiry date | Jul 17, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J61/28
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An amalgam capsule (16) for a low-pressure mercury vapor discharge lamp (1) has a closed end and an opposing end with an opening (21) to allow passage of mercury vapor between the amalgam plug (18) and the discharge space (3) of the lamp (1). A glass rod (19) placed in the capsule (16) restrains movement of the amalgam plug (18), and projections (20) in the inner wall of the capsule (16) restrain movement of the glass rod (19). The presence of the amalgam capsule (16) in the discharge space (3) enables highly-loaded, substantially temperature-independent operation of linear fluorescent lamps such as T8 lamps.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.