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. 23, 1999
Filed:
Oct. 03, 1996
Philip Anthony May, Bolton, GB;
Elcometer Instruments Limited, Manchester, GB;
Abstract
A dual-mode coating thickness measuring probe for determining the thickness of a coating on ferrous and non-ferrous substrates. The probe has a first winding assembly including an induction winding and two search or pick-up windings and a second winding assembly including a search winding disposed on a non-magnetic and non-conductive former. A magnetic cylindrical pin of a material with a high resistance to impact and abrasive wear passes through the first and second windings. A conductive non-magnetic coaxial screen through which the pin extends separates the first winding from the second winding. The position of the screen is such that it has a minimal effect on the second winding while shielding its field from the first winding. The first and second windings are connected to signal conditioning circuitry which produces outputs representing the coating thickness measured.