Convergence apparatus for in-line beams
US4091347A · kind A · utility
6Cited by
3References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 17, 1976 |
| Grant date | May 23, 1978 |
| Priority date | — |
| Expiry date | Mar 17, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J29/703
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A first magnetic field producing member has its poles oriented for producing an initial predetermined movement of the two outside ones of three in-line beams of a cathode ray tube. Second and third field producing members are adjustable for producing variable strength and direction of magnetic fields for moving the two outside beams in opposite and the same directions, respectively, for converging the three beams.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.