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:
Apr. 21, 1998
Filed:
Oct. 09, 1996
Roderick G Bergstedt, Fort Wayne, IN (US);
Donald J Schreiber, Columbia City, IN (US);
Thomas G Klapheke, Fort Wayne, IN (US);
Russell C Smith, Albion, IN (US);
Hughes Electronics, Los Angeles, CA (US);
Abstract
In a preferred embodiment, an apparatus for detecting the angular position, rotational speed, and/or acceleration of a rotatable member, including: an annular magnetic source circumferentially disposed on the rotatable member and rotatable therewith; a directional magnetometer having a toroidal core, disposed at a location in proximity to the magnetic source, with the rotatable member passing through the toroidal core, the directional magnetometer being oriented so as to detect the amplitude and/or change of amplitude of only a tangential magnetic flux field component of the magnetic source, and to provide outputs indicative thereof; and apparatus to receive the outputs and to determine therefrom the angular position, rotational speed, and/or acceleration of the rotatable member.