Patent · US Expired

Directly heated thermionic flat emitter

US6624555B2 · kind B2 · utility

5Cited by

1References

11Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Erich Hell · Erlangen, DE
Detlef Mattern · Erlangen, DE
Markus Schild · Herzogenaurach, DE

Key dates

Filing date	Jun 11, 2001
Grant date	Sep 23, 2003
Priority date	—
Expiry date	Oct 9, 2021

Classification

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

Abstract

A directly thermionic flat emitter is presented whose emitting surface contains meandering conductor tracks. The conductor tracks are formed by slots in the emitting surface. The slots are arranged as claimed in a pattern of cuts which comprises a multiplicity of straight slots (3; 8, 9) which run at least transverse to the course of the main current direction and are arranged in a plurality of rows offset from one another. Meandering current paths (4) are thereby produced.

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