Patent · US Expired

Material for electrical contacts

US4341556A · kind A · utility

9Cited by

8References

4Claims

0Family size

Assignee

Degussa AG · DE

Inventors

Wolfgang Bohm · Alzenau, DE
Roger Wolmer · Gelnhausen, DE
Andreas Szulczyk · Gelnhausen, DE
Willi Malikowski · Aschaffenburg, DE

Key dates

Filing date	Apr 30, 1981
Grant date	Jul 27, 1982
Priority date	—
Expiry date	Apr 30, 2001

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC22C32/0021
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

There is described a material for electrical contacts based on silver having 5 to 20 weight % tin oxide and 0.5 to 5 weight % tungsten oxide which has the welding strength reduced further without producing an increased switching temperature. The material contains additionally 0.1 to 5 weight % of bismuth oxide.

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