Photomultiplier tube having a metal-made sidewall
US5504386A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 9, 1993 |
| Grant date | Apr 2, 1996 |
| Priority date | — |
| Expiry date | Mar 9, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J43/28
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A photomultiplier tube which obtains a large decrease in manufacture time, prevents generation of gas within the envelope, prevents deterioration of electron multiplier assembly (dynodes), and greatly reduces noise. The envelope includes an all-metal cylindrical sidewall, at one end of which is an annular, flange-shaped, metal sealing area. The stem of the photomultiplier tube has another annular flange-shaped, metal sealing area. These two sealing areas are welded together. Also a metal exhaust tube is connected to the stem by resistance welding. The metal exhaust tube is severed using pinch-off seal at the final stage of the photomultiplier tube production.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.