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:
Apr. 16, 1991
Filed:
Jan. 03, 1990
Applicant:
Inventors:
Assignee:
Asea Brown Boveri AB, Vaster.ang.s, SE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01L / ;
U.S. Cl.
CPC ...
7386269 ; 336 20 ;
Abstract
A magnetoelastic force transducer according to the invention comprises two closed magnetic circuits. The transducer is constructed in such a way that the reluctance in one of the magnetic circuits will be changed when the transducer is subjected to a force as a result of changes in the magnetic permeability caused by magnetostriction. The second magnetic circuit is formed so as to have an essentially unchanged reluctance when the transducer is loaded and is used to compensate for those changes in the permeability of the material arising for reasons other than magnetostriction.