Patent · US Expired

Cold-cathode gas-discharge device

US3989973A · kind A · utility

9Cited by

9References

1Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Gerhard Lange · Berlin, DE
Gerhard Peche · Berlin, DE

Key dates

Filing date	Jul 31, 1975
Grant date	Nov 2, 1976
Priority date	—
Expiry date	Jul 31, 1995

Classification

Technology area (CPC H)Electricity
CPC primaryH01J2893/0059
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

This invention provides a cold-cathode gas-discharge tube comprising a gas-tight, electrical-insulating housing, a control cathode attached to and surrounding the outside of the gas-tight housing, two spaced main electrodes symmetrically mounted in the housing with their frontal surfaces facing each other, metallic rings attached to the frontal surfaces of both main electrodes, and layers of an activating material adhered to the frontal surfaces of both main electrodes within the metallic rings, whereby the main electrodes become in effect hollow electrodes.

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