Sodium vapor lamp for sonic pulse operation
US4961020A · kind A · utility
2Cited by
5References
22Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 3, 1989 |
| Grant date | Oct 2, 1990 |
| Priority date | — |
| Expiry date | Mar 3, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J61/36
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An improved high pressure sodium vapor lamp construction is provided for operation on sonic frequency pulses without excessive acoustic noise. The novel jacketed lamp construction employs non-magnetostrictive metal for the frame employed to suspend a ceramic arc tube within the outer jacket in combination with a particular orientation or placement for ring getter elements located within said outer envelope. Various lamp constructions embodying such improvement are disclosed to enable relatively noise free lamp operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.