Stabilized high intensity discharge lamp
US4581557A · kind A · utility
12Cited by
10References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 14, 1980 |
| Grant date | Apr 8, 1986 |
| Priority date | — |
| Expiry date | Oct 14, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J61/20
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An amalgam is disposed within the arc tube of a high intensity arc discharge lamp so as to stabilize the electrical power being supplied to the lamp against variations in line voltage. The vapor pressure of mercury in the arc tube varies as a function of the lamp temperature which depends in turn on applied lamp voltage. The resulting change in arc voltage due to corresponding changes in mercury pressure operates to restore the power input to its approximate original value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.