High yield wide channel annular ring shaped getter device
US5118988A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 1, 1990 |
| Grant date | Jun 2, 1992 |
| Priority date | — |
| Expiry date | Oct 1, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J29/94
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An evaporable getter device, for mounting in an electron tube, comprises a holder whose bottom wall is provided with means for preventing detachment of getter metal vapor releasing material which has been pressed into the holder and which has a multiplicity of means which retard the transmission of heat in a circumferential direction through the getter metal vapor releasing material. When the getter device is heated by currents induced from a radio-frequency field generated by a coil positioned outside the electron tube large amounts of getter metal are released in a short time without detachment of material from the holder. The heat retarding means are preferably four equally spaced radial grooved formed in the upper surface of the getter metal vapor releasing material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.