Color picture tube with support arrangement for a rectangular shadow mask
US4728853A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 26, 1986 |
| Grant date | Mar 1, 1988 |
| Priority date | — |
| Expiry date | Jun 26, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J29/073
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In a color picture tube in which a shadow mask is placed close to a phosphor screen inside an envelope which has an oblong-shaped panel, the shadow mask is supported at the four corners of the panel by plate spring members. The spring members are each constructed from a 1st member which is fixed so that it is easily mounted on and dismounted from the stud pins on the panel and a 2nd member which is welded to the mask frame of the shadow mask. These members are incorporated as one by face-welding together at their ends. In this type of spring member structure, the members work together to alleviate the bending deformation which is applied to the members through the repeated mounting of the shadow mask panel which accompanies production.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.