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. 22, 1994
Filed:
Dec. 13, 1991
Matti J Kajola, Helsinki, FI;
Jukka E Knuutila, Helsinki, FI;
Neuromag Oy, , FI;
Abstract
The invention concerns a pickup coil to measure components of gradients. The coil consists of two pairs of loops connected in series; these pairs are then connected in parallel. The coil so formed has a low inductance, and no shielding currents are induced to superconducting coils in homogeneous magnetic fields. One coil can be employed to measure several field components simultaneously when the coil is coupled to current sensing elements, for example to SQUIDS, so that the current components measured by the sensing elements do not couple magnetically because of the symmetry. This can be accomplished by connecting the said elements between terminals between the loops (5, 6 and 7, 8). The inductance of this coil can be further reduced by subdividing the loops into parts connected in parallel.