Multi-step tube of a ceramic material and gas discharge tube made of the same
US9762035B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 6, 2011 |
| Grant date | Sep 12, 2017 |
| Priority date | — |
| Expiry date | Sep 18, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01T4/20
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A multi-step tube (1) of a ceramic material comprises a tube body (1) of the ceramic material having an inner wall (11) located inside the tube body (1). A surface of the inner wall (11) is formed with a plurality of steps (2). The steps (2) are formed to extend differently far inside the tube (1). A multi-layered gas discharge tube comprises the multi-step tube (1). An inner electrode (31) is disposed on a step (21), and an outer electrode (41) is disposed on an outer surface (13) of the tube body (1). A disc (51) is partially placed on a step (22) and the inner electrode (31) between the inner electrode (31) and the outer electrode (41) so that, in case of an electrostatic discharge, the discharge will only take place in the center of the multi-step tube (1) and not at the border of the isolated ceramic disc (51).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.