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. 01, 1989
Filed:
Nov. 04, 1987
Ralph Carmen, Lebanon, NJ (US);
The Superior Electric Company, Bristol, CT (US);
Abstract
A magnetoresistive sensor includes groups of MR elements arranged on a non-magnetic substrate for selective connection to detect and sense magnetic information recorded on a number of different diameter encoder wheels of which each diameter wheel may have a different number of pieces of magnetic information recorded at corresponding different wavelenths (.lambda.) on a circumferentially running track located on the circumferential face of the wheel. The MR sensor includes an additional MR element arrangement for detecting and sensing index magnetic information recorded on an additional circumferentially running track located on the circumferential face of the wheel. The connection arrangement of the MR elements is such to form external power supply connection terminals which have a width substantially larger than the width of the MR elements and surround the MR elements covering a substantial portion of the substrate surface to form a heat sink to eliminate thermal gradients from developing across the substrate thereby providing thermal stability.