Patent · US Expired

Electron-beam forming system for multi-beam cathode-ray tubes

US4492894A · kind A · utility

5Cited by

3References

5Claims

0Family size

Assignee

International Standard Electric Corporation · US

Inventors

Hans Reule · Wissen, DE
Hartmut Ganzle · Bad Liebenzell, DE
Horst Vogel · Préverenges, CH

Key dates

Filing date	Oct 17, 1983
Grant date	Jan 8, 1985
Priority date	—
Expiry date	Oct 17, 2003

Classification

Technology area (CPC H)Electricity
CPC primaryH01J29/484
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

The electrodes of an electron-gun system of a color-picture tube are heated less as their distance from the cathode of the system increases. The electrode materials are so chosen with respect to their coefficients of expansion that no mechanical stresses are caused in the system structure despite the different temperatures.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.