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:
May. 26, 2026
Filed:
Jun. 30, 2021
Mitutoyo Corporation, Kanagawa-ken, JP;
Ted Staton Cook, Kirkland, WA (US);
Mitutoyo Corporation, Kanagawa-Ken, JP;
Abstract
An inductive position encoder includes a scale, detector, and signal processor. The scale includes a periodic pattern of signal modulating elements (SME) arranged along a measuring axis (MA) with spatial wavelength W1. The detector comprises sensing elements and a field generating coil that generates changing magnetic flux. The sensing elements comprise conductive loops that provide detector signals responsive to a local effect on the magnetic flux provided by adjacent SME's. The conductive loops have an average MA dimension that spatially filters a 3spatial harmonic signal component and are located along the MA according to an 'inter-loop' shift relationship wherein first and second equal numbers of positive and negative polarity loops, are shifted in opposite directions by W1/4K (K=3, 5, 7, 9). Third and Kth spatial harmonic components are both reduced in the detector signals while using a novel “layout friendly” loop arrangement to solve longstanding detrimental layout problems.