Solenoidal electric field lamp with reduced electromagnetic interference
US4187445A · kind A · utility
7Cited by
1References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 21, 1978 |
| Grant date | Feb 5, 1980 |
| Priority date | — |
| Expiry date | Jun 21, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J65/048
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A solenoidal electric field lamp comprises a plurality of toroidal ferrite cores connected to a radio frequency energy source and disposed in an ionizable gas. The cores are so connected and oriented that circulating discharge currents passing through each core produce magnetic dipole fields which tend to cancel one another. Near and far field electromagnetic interference is thus reduced even when the lamp is operated at higher, more efficient frequencies. The cores are disposed in a variety of configurations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.