Electrically resistive arc suppressor shadowing getter flash
US4220893A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 26, 1976 |
| Grant date | Sep 2, 1980 |
| Priority date | — |
| Expiry date | Jul 26, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J29/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
This disclosure depicts an arc-suppression means for use in cathode ray tubes having an electron gun and ancillary electrical circuits susceptible to damaging electrical arcing currents, and wherein getter means are used to capture residual gases in the evacuated envelope of the tube. The arc-suppression means is electrically resistive and is connected in an electrical path between the gun and a high voltage source, and its surface is physically exposed to a deposit of getter material when the getter is flashed. The arc-suppression means includes shadowing means for shadowing at least portions of the exposed surface from a deposit of the getter material to prevent the creation of an electrically conductive shorting path capable of permitting an arc to bypass or substantially nullify the arc-suppression means.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.