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:
Sep. 22, 1987
Filed:
Jul. 09, 1985
Applicant:
Inventor:
Hinne Zijlstra, Eindhoven, NL;
Assignee:
U.S. Philips Corporation, New York, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G01R / ;
U.S. Cl.
CPC ...
324319 ; 324318 ;
Abstract
In a nuclear magnetic resonance apparatus the permanent magnetic material of the main magnet is formed by magnetized bars bounded by flat planes which surround a field space with a polygonal cross-section. Fitted around the permanent magnetic material is a return yoke of high-permeability material whose geometry can be matched to the locally prevailing flux. Extra magnetic devices can be fitted to improve the field uniformity in the field space enclosed by the magnetic material.