Patent · US Expired

Directly heated thermionic flat emitter

US6646366B2 · kind B2 · utility

28Cited by

3References

5Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Erich Hell · Erlangen, DE
Detlef Mattern · Erlangen, DE

Key dates

Filing date	Jul 24, 2002
Grant date	Nov 11, 2003
Priority date	—
Expiry date	Jul 24, 2022

Classification

Technology area (CPC H)Electricity
CPC primaryH01J35/064
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A directly heated thermionic flat emitter has an emission surface divided by slots into interconnects that have respective terminal lugs forming power leads arranged at a peripheral edge. A number of segments are connected by respective narrow webs to the outermost interconnects of the emitter but have no connection to one another. The webs are arranged and dimensioned such that practically no current can flow from the interconnects to the segments and so that thermal conduction to the segments is largely suppressed.

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