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. 24, 2002
Filed:
Feb. 09, 2001
Anwar Chitayat, Fort Salanga, NY (US);
Anorad Corporation, Hauppauge, NY (US);
Abstract
An encoder includes a plurality of magnetic zones of alternating polarity. At the opposed ends of the encoder magnet are magnetic end zones that provide substantially symmetric magnetic fields. The encoder sensors include first and second sensors that are spaced apart from each other a distance functionally related to the distance between the magnetic end zones. A plurality of first and second sensors are arranged so that the encoder magnet may move relative to the sensors. Each of the first and second sensors provides an associated output signal in response to magnetic influence of the encoder magnet moving past each respective encoder sensor. When each of the first and second encoder sensors senses one of the magnetic end zones of the encoder magnet, the associated output signals are substantially symmetric.