Color picture tube with shadow mask supporting assembly
US4866333A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 25, 1988 |
| Grant date | Sep 12, 1989 |
| Priority date | — |
| Expiry date | Apr 25, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J29/073
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A color picture tube comprises a panel of a substantially rectangular shape, a phosphor screen formed on the inner surface of the panel, a stud pin which is made of a rod with a tapered portion and which is mounted on the inner side surface of the panel, a spring member having a through hole and fitted with the tapered portion of the stud pin through the through hole, and a shadow mask mounted on the panel through the stud pin and the spring member so as to be opposite or adjacent to the phosphor screen, wherein if the spring member is in contact with the stud pin at least two positions, the following inequality is satisfied: EQU N/F.ltoreq.1.8 where PA0 N: a force of the spring member acting on that portion of the stud pin which contacts the spring member along a direction substantially perpendicular to the surface of the stud pin (kg.f) PA0 F: a force of the spring member acting on that portion of the stud pin which contacts the spring member, along a direction substantially parallel to the central axis of the stud pin (kg.f).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.