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. 01, 1981
Filed:
May. 23, 1979
Applicant:
Inventors:
Wen H Ko, Cleveland Heights, OH (US);
Chih P Hung, Berea, OH (US);
Assignee:
North American Manufacturing Company, Cleveland, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R / ;
U.S. Cl.
CPC ...
324 / ; 324D / ;
Abstract
A sensing device for sensing the position of a continuously moving strip of metal and providing a signal for centering the strip on a given line of movement which has good linearity, good stability, and a time stable output. Segments of a pair of capacitor plates overlap each edge of the strip. These are energized by a square wave signal and the variation in capacity between the plates and the strip caused by lateral movement of the strip is detected by a diode bridge and the resultant signal made available to power apparatus for correcting the position of the web.