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. 31, 1993
Filed:
Mar. 27, 1992
Jean-Yves Boniort, Limours, FR;
Georges Roussy, Laxou, FR;
Alcatel N.V., , NL;
Abstract
Apparatus for measuring continuously and without contact the thickness of a thin conducting layer on a running insulating support of the fiber or tape kind, wherein the apparatus includes: a microwave generator associated by coupling means to a resonant cavity comprising a metal wire in the form of a helix which is fixed at its ends to two metal plates, said insulating support being suitable for running substantially along the axis of said helix; and means for coupling said cavity to a detection device for detecting the transmission factor of said cavity, which factor is directly a function of said thickness, said measurement being performed at constant frequency.