Patent · US Active

Thermionic emission device, focus head, x-ray tube and x-ray radiator

US10043632B2 · kind B2 · utility

1Cited by

3References

14Claims

0Family size

Assignee

Siemens Healthcare Limited · DE

Inventors

Anja Fritzler · Simmerath, DE
Peter GEITHNER · Erlangen, DE

Key dates

Filing date	Aug 17, 2017
Grant date	Aug 7, 2018
Priority date	—
Expiry date	Aug 17, 2037

Classification

Technology area (CPC H)Electricity
CPC primaryH01J2235/00
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A thermionic emission device includes an indirectly heatable main emitter, which is constructed as a flat emitter with a main emission surface, and at least one connectible heat emitter with a heat emission surface. The heat emission surface is disposed at a predefinable distance from the main emission surface. The main emission surface can be asymmetrically heated by the heat emission surface. In the operating state, the main emitter is at a main potential and the heat emitter is at a heating potential which differs from the main potential. An x-ray tube with the thermionic emission device has a longer service life with a consistent image quality.

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