Apparatus with a cap and cover assembly, an electron gun with a cap assembly, and a method of using a tube
US6911770B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 1, 2002 |
| Grant date | Jun 28, 2005 |
| Priority date | — |
| Expiry date | Feb 1, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2209/26
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A cap can comprise an aperture, and an attenuator may block the aperture during at least one point in time. In one embodiment, the attenuator can include a cover that may be displaced by a spring. In another embodiment, such as an electron gun, may comprise a support cap with an aperture, a displaceable cover that may cover the aperture, and a spring. A material attached to the spring and acting as a fuse may release the spring and expose the aperture after an electrical current blows the “fuse”. In yet another embodiment, a method for using a tube may comprise evacuating the tube while a cover covers an aperture in the support cap of a electron gun that is at least partially in the tube and moving the cover to expose the aperture after the tube is sealed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.