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:
Sep. 25, 1990
Filed:
Dec. 15, 1988
Applicant:
Inventor:
Anthony J Maher, Vermont South, AU;
Assignee:
Detection Systems Pty. Ltd., , AU;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G08B / ; G01V / ;
U.S. Cl.
CPC ...
340568 ; 324239 ; 324327 ;
Abstract
A search head for a metal detector, the head comprising a support body and three conductive loops mounted on the body, the loops being formed from a single ribbon cable. An oscillating signal is applied to one of the loops and induced voltages in the other two loops are subtracted, the arrangement being such that a difference will appear in the subtracted voltages when a metal object is closer to the other two loops.