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:
Jul. 13, 1999
Filed:
Mar. 26, 1998
Applicant:
Inventor:
Arthur F Kuckes, Ithaca, NY (US);
Assignee:
Vector Magnetics, Inc., Ithaca, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21B / ; E21B / ; G01V / ; G01V / ;
U.S. Cl.
CPC ...
324326 ; 175 45 ; 175 62 ; 32420717 ; 324346 ;
Abstract
A method and apparatus for precise measurement of the distance and direction from a magnetic field sensor to a nearby magnetic field source includes an elongated iron core solenoid driven by a repetitive, nonsinusoidal current source. In the near field the solenoid has two spaced, temporally varying magnetic poles, and measurement of the distance and direction to this source includes analysis of field components which vary in synchronism with the current source.