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:
Mar. 14, 1989
Filed:
Jun. 11, 1986
Applicant:
Inventor:
Francois Duthoit, Brest, FR;
Assignee:
Thomson-CSF, Paris, FR;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N / ; G01R / ; H01F / ; H01H / ;
U.S. Cl.
CPC ...
324226 ; 324244 ; 361149 ;
Abstract
The invention concerns processes for immunizing nautical vessels against the disturbances that they cause to the magnetic field of the earth, consisting in supplying immunization loops of such a vessel with a set of alternating currents producing inside the volume of the vessel a homogeneous and alternating inductor field, isolating the alternating signal issuing from the alternating field at the measuring base and calculating the induced magnetization, wherein it allows to separate the induced magnetization from the permanent magnetization in the magnetic signature of a vessel while reducing the duration of measuring time required.