Patent · US Expired

Silver-iron material for electrical switching contacts (III)

US5728194A · kind A · utility

3Cited by

7References

11Claims

0Family size

Assignee

Degussa AG · DE

Inventors

Wolfgang Weise · Frankfurt, DE
Willi Malikowski · Aschaffenburg, DE
Roger Wolmer · Gelnhausen, DE
Peter Braumann · Alzenau, DE
Andreas Koffler · Meißen, DE

Key dates

Filing date	Nov 19, 1996
Grant date	Mar 17, 1998
Priority date	—
Expiry date	Nov 19, 2016

Classification

Technology area (CPC H)Electricity
CPC primaryH01H1/023
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

Silver-iron materials for electrical switching contacts with properties which come very close to those of silver-nickel materials formed of 0.5 to 20% by weight iron 0.5 to 5% by one or more of the elements rhenium, iridium, and ruthenium, and 0.05 to 2% by weight of one or more of the oxides magnesium oxide, calcium oxide, yttrium oxide, lanthanum oxide, titanium oxide, zirconium oxide, hafnium oxide, cerium oxide, niobium oxide, tantalum oxide, chromium oxide, manganese oxide, iron oxide, zinc oxide, copper oxide, aluminum oxide, indium oxide, silicon oxide, and tin oxide, the balance being silver.

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