Patent · US Expired

Vacuum switching tube with a helical current path

US4516004A · kind A · utility

7Cited by

5References

18Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Peter-Michael Bany · Berlin, DE
Wolfgang Berger · Benediktbeuern, DE
Hans Bettge · Berlin, DE
Gunter Bialkowski · Berlin, DE
Rafl Rozek · Berlin, DE
Norbert Steinemer
Claus-Jurgen Volkmann · Berlin, DE

Key dates

Filing date	Aug 18, 1983
Grant date	May 7, 1985
Priority date	—
Expiry date	Aug 18, 2003

Classification

Technology area (CPC H)Electricity
CPC primaryH01H33/6645
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A vacuum switching tube having an evacuated housing in which contacts are disposed movable relative to each other and an improved current lead for such a vacuum tube are disclosed. The current lead comprises a core and a jacket surrounding the core. The core is made of a material with low electric conductivity compared to the jacket and has a helical outer contour. The core can be made by twisting a rod of polygonal or star-shaped cross section. A jacket of a material with relatively high electrical conductivity and with a smooth cylindrical outer contour is applied to the core. The jacket is joined to the core firmly without space between them or is made in one piece with the core.

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