Gas discharge lamp having temperature controlled, liquid reservoir for liquified portion of gas
US4949004A · kind A · utility
3Cited by
2References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 8, 1989 |
| Grant date | Aug 14, 1990 |
| Priority date | — |
| Expiry date | Feb 8, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J61/52
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A mercury-vapor lamp is provided with a reservoir in which a superfluous amount of mercury is stored in the form of liquid state. The liquid mercury in the reservoir is cooled to a certain temperature. The pressure of mercury-vapor is automatically reduced to the saturated pressure of the liquid mercury cooled. In this configuration, the pressure of mercury-vapor is controlled by adjusting the temperature of the liquid mercury stored in the reservoir.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.