Devices and methods of using HF waves to energize a column of gas enclosed in an insulating casing
US4049940A · kind A · utility
27Cited by
5References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 30, 1975 |
| Grant date | Sep 20, 1977 |
| Priority date | — |
| Expiry date | Oct 30, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05H1/46
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A device which generates plasma by energizing a column of gas with a high frequency periodic electric field of a frequency of at least 100MHz. The generating means extends over only a part of the gas column and the power of the energizing field is such that the plasma generated includes and extends beyond said part of the gas column. In one embodiment the gas column is contained in an elongated insulating casing and the generating means comprises a first metallic tube open at both ends and surrounding a part of the casing, a second tube enclosing the first, and a connecting ring between the first and second tubes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.