Hollow cathode discharge tube
US5483121A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 22, 1993 |
| Grant date | Jan 9, 1996 |
| Priority date | — |
| Expiry date | Apr 22, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J61/04
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A hollow cathode discharge tube is used for atomic absorption analysis. The tube has a cathode which includes a first hollow portion and a second hollow portion connected to each other. The second hollow portion has a diameter greater than the first hollow portion and a close end. Inserted through the closed end is a rod-like anode which has a part within the hollow space of the cathode. There is a auxiliary electrode which can be an auxiliary anode that surrounds the rod-like anode and is insulated therefrom. There is an additional electrode which can be an auxiliary cathode at the front end portion of the cathode. The cathode is formed of a material that is a material or includes a material that is to be analyzed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.