Vacuum tube
US9589758B2 · kind B2 · utility
0Cited by
0References
7Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Jan 19, 2016 |
| Grant date | Mar 7, 2017 |
| Priority date | — |
| Expiry date | Jan 19, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J21/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An object of the present invention is to provide a vacuum tube with a structure close to that of an inexpensive and easily available vacuum fluorescent display which easily operates as an analog amplifier. A vacuum tube subject to the present invention comprises: a filament which is tensioned linearly and emits thermoelectrons, an anode arranged parallel to the filament, and a grid arranged between the filament and the anode such that the grid faces the anode. The present invention is characterized in that a distance between the filament and the grid is between 0.2 mm and 0.6 mm, including 0.2 mm and 0.6 mm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.