D.C. lamp discharge gas pumping control
US4698549A · kind A · utility
5Cited by
7References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 2, 1986 |
| Grant date | Oct 6, 1987 |
| Priority date | — |
| Expiry date | Sep 2, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J61/28
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An amalgam of mercury is placed at the anode end of a low-pressure mercury discharge lamp for D.C. operation to counteract mercury vapor depletion at the anode end of the lamp. The amalgam attracts mercury vapor to the anode end of the lamp when the lamp is turned off to maintain uniform mercury vapor distribution in the lamp.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.