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:
Feb. 18, 2003
Filed:
May. 17, 1999
Bernard Auge De Fleury, Noisy le Grand, FR;
Jean Yves Zliechovec, Seugy, FR;
Jean-Claude Bouttemy, Issy les Moulineaux, FR;
Alstom France S.A., Paris, FR;
Abstract
The device for measuring a physical quantity associated with the rotation of a member includes a metal disc, integral with the rotating member, provided with at least one aperture forming a reference point. In addition, this device includes a fixed assembly for detecting the reference point, with at least one magnetic proximity detector and a part for checking that this detector is operating correctly, this being fixed outside the magnetic detector, without electrical contact or connection with the latter. The checking part has at least one conducting turn which surrounds an active end of the detector and is connected to modify its state by short-circuiting this turn or by supplying it with current.