The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 05, 1985
Filed:
Feb. 07, 1984
Horst Schreiner, Nuremberg, DE;
Siemens Aktiengesellschaft, Berlin and Munich, DE;
Abstract
AgCdO based contact elements are replaced in contactors and small circuit breakers with CdO-less type elements which exhibit little burn-off in the arc, a low welding force and minimal heating when carrying continuous current. However, known AgSnO.sub.2 contact materials do not have optimum values in all operationally important properties. In these contact materials a more firmly adhering oxide layer occurs as compared with AgCdO. The invention relates to a sintered compound material for electrical contacts, consisting of AgSnO.sub.2 Bi.sub.2 O.sub.3 CuO and containing at least one other metal oxide additive which sublimes below the melting temperature of silver. The SnO.sub.2, Bi.sub.2 O.sub.3 and CuO are globularly precipitated in silver material structure zones having a maximum diameter of 200 .mu.m, and the metal oxide additive is distributed on the surfaces of the boundary regions of these microscopic silver zones.