Magnetic deflector for trichromatic tube with shield and method to set this deflector
US4839568A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 28, 1987 |
| Grant date | Jun 13, 1989 |
| Priority date | — |
| Expiry date | Sep 28, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2229/964
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A magnetic deflector of the saddle-saddle type, for a trichromatic tube protected by a shield, with in-line guns and round-luminophor type screen, is designed to function with a saddle-torus type of magnetic deflector. The invention uses a saddle-saddle type of deflector in which the front leading-out wires have been reduced and the rear leading-out wires are laid flat. Furthermore, the ferrite piece is extended by a ring which surrounds the rear leading-out wires and is magneticlaly closed by a ferrite ring bearing a quadrupole coil powered by a parabolic current. The intention can be applied to round-luminiphor trichromatic tubes fitted with an external shield.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.