Sealing electrode and surge absorber using the same
US5506071A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 27, 1993 |
| Grant date | Apr 9, 1996 |
| Priority date | — |
| Expiry date | Oct 27, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01T4/12
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A surge absorber 20 is produced by sealing a glass tube 10 by sealing electrodes 11 and 12 in state that the glass tube 10 is incorporated with a surge absorbing element 13 and with inert gas 14. The sealing electrode is constructed of an electrode member 11a made of alloy containing iron and nickel, and a copper thin film 11b or 21b of a predetermined thickness formed on both surfaces of this electrode member or only on one-side surface in contact with the glass tube and facing on an inside of the glass tube. A Cu.sub.2 O film 11c may preferably be formed on a surface of the copper thin film. This sealing electrode can be sealed in an inert gas atmosphere and has a satisfactory sealability to the glass tube with an electron emission accelerating action. In case where the copper thin film is formed on both surfaces of the electrode member, a lead wire can easily be soldered on an outer surface of the sealing electrode. The surge absorber sealed by this sealing electrode, at the time of sealing and arc discharging, is hardly deteriorated of its conductive coating and micro-gap, and has a higher surge resistance with a long service life.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.