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:
Dec. 26, 1989
Filed:
Aug. 24, 1988
Michiru Fujita, Kawasaki, JP;
Fuji Electric Co., Ltd., Kawasaki, JP;
Abstract
A coil for generating a homogeneous magnetic field has a first coil unit composing three pairs of coils each including a common central axis and being symmetric with respect to the center of the central axis and a second coil unit composing two pairs of coils provided outside of and axially with the first coil unit and being symmetric with respect to the center of the central axis. The magnetic moment of the first coil unit is identical in magnitude to and opposite in direction to that of the second coil unit, so that the magnetic field due to leakage flux is substantially cancelled out. Moreover, since each coil composing the first coil unit is selectively located in proper position and the amount of ampere-turn of each coil can be selected, it is possible to reduce to zero the coefficients of terms up to tenth order with respect to the strength distribution of magnetic fields on the central axis generated by the first and the second coil units, resulting in enhancing homogeneity of the magnetic field.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile