Patent · US Expired

Direct-Heated flats emitter for emitting an electron beam

US6115453A · kind A · utility

15Cited by

13References

16Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Erich Hell · Erlangen, DE
Detlef Mattern · Erlangen, DE
Peter Schardt · Simmerath, DE

Key dates

Filing date	Aug 20, 1998
Grant date	Sep 5, 2000
Priority date	—
Expiry date	Aug 20, 2018

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S430/143
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A direct-heated flat emitter for generating a homogenous electron beam, particularly for x-ray tubes, has two terminal lugs for the heating current supply formed at the edge of the perimeter of the emission surface and the emission surface is subdivided into interconnects by slits. The slits have a width no less than 10 .mu.m and no greater than 1% of the length of a diagonal of the smallest rectangle which can circumscribe the emission surface.

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