Unitary light shield for use in color picture tube lighthouses
US4354746A · kind A · utility
1Cited by
4References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 24, 1981 |
| Grant date | Oct 19, 1982 |
| Priority date | — |
| Expiry date | Sep 24, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J9/2272
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A unitary light shield for use with a color picture tube lighthouse has non-reflective sides, the edges of which are curved to conform with the intensity pattern of the exposing lamp. An apertured bottom member also is non-reflective of light. The device substantially reduces the exposure of the sidewalls of the panels by penumbra and scattered light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.