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:
Aug. 19, 2008
Filed:
Apr. 15, 2003
Applicant:
David I. Hoult, Winnipeg, CA;
Inventor:
David I. Hoult, Winnipeg, CA;
Assignee:
National Research Council of Canada, Ottawa, Ontario, CA;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01R 33/00 (2006.01); G08B 13/24 (2006.01); G08B 21/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
An apparatus for detecting a potentially dangerous ferromagnetic object carried inadvertently by a person approaching the magnet of a magnetic resonance imaging system () uses the fringe field () of the magnet and provides guide members () defining a path along which the person is prescribed to pass. The path () is generally or approximately parallel to the field the path. At least one sense coil and generally two sets of sense coils () are located on respective sides of the path () s the movement of the ferromagnetic object in the field of the magnet causes a voltage to be generated in the sense coil.