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:
Feb. 09, 1982
Filed:
Apr. 29, 1980
Applicant:
Inventors:
Friedrich Pfeifer, Bruchkobel, DE;
Wernfried Behnke, Hanau, DE;
Assignee:
Vacuumschmelze GmbH, , DE;
Primary Examiner:
Int. Cl.
CPC ...
C21D / ; H01F / ;
U.S. Cl.
CPC ...
148108 ; 148-63 ; 148 315 ; 148 3155 ; 148122 ; 428606 ; 428629 ; 428928 ;
Abstract
A technique for processing thin tapes of soft magnetic amorphous metal alloys to reduce their magnetic hysteresis losses. The technique involves preliminarily forming such a tape into a core, heating the core, and then controllably cooling the core, the heating and cooling being conducted in an oxidizing atmosphere. Maintaining the core during processing in a suitable longitudinal or transverse (relative to the tape) magnetic field can also produce improved properties. Certain tape cores so processed have particular magnetic hysteresis loss characteristics never heretofore known.