Cathode ray tube with magnetic pole pieces which support a ring getter
US4609847A · kind A · utility
3Cited by
3References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 22, 1983 |
| Grant date | Sep 2, 1986 |
| Priority date | — |
| Expiry date | Dec 22, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J29/563
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In a deflection means 11 having a field of pin-cushion type flux distribution, at least a pair of T-shaped magnetic pole pieces 9, 10 are disposed between the front end of an electron gun 2 and the center part of the deflection means 11, thereby to form a barrel type flux distribution, to attain high resolution even at peripheral part of the fluorescent screen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.