Low pressure mercury vapor discharge lamp
US5204584A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 20, 1991 |
| Grant date | Apr 20, 1993 |
| Priority date | — |
| Expiry date | Sep 20, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J61/24
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A low pressure mercury vapor discharge lamp having a suitable combination of a main amalgam and an auxiliary amalgam. The main amalgam has a mercury vapor pressure not less than a third as much as a mercury vapor pressure of pure mercury at a temperature between 0.degree. C. and 50.degree. C. The auxiliary amalgam has a mercury vapor pressure not less than a third as much as the mercury vapor presure of said main amalgam at a temperature between 0.degree. C. and 50.degree. C. Such a combination is advantageous in that the mercury vapor pressure of the lamp is maintained at a certain level in the low and middle tube wall temperature area and that the luminous output is maintained at a high level in that temperature area, and also that the increasing speed of luminous flux of lamps using these amalgams during a starting period (a luminous flux increasing characteristic) is fast nevertheless, in the low and middle tube wall temperature area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.