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:
Jun. 17, 1997
Filed:
Jun. 21, 1995
Kenneth R Talbott, Gretna, VA (US);
Charles L Hylton, Madison Heights, VA (US);
James A Austin, Lynchburg, VA (US);
William C Hooss, Lynchburg, VA (US);
David V Adams, IV, Gretna, VA (US);
Kevin G Schulz, Forest, VA (US);
Paul R Smith, Jr, Lynchburg, VA (US);
Limitorque Corporation, Lynchburg, VA (US);
Abstract
An absolute encoder monitors rotary position and senses rotary displacement relative to a measuring scale. The absolute encoder evaluates rotary displacement by providing a plurality of rotatably mounted encoder wheels, and each wheel includes at least one code sequence which in combination comprises the measuring scale. A pinion is provided between each pair of encoder wheels in order that each of the encoder wheels will be rotated upon the rotation of the shaft. Each code sequence of the encoder wheel is monitored by a sensing mechanism and this information is utilized to evaluate the shaft position. The sensing mechanism includes both light emitting and light detecting devices which monitor a defined region of each code sequence and this is evaluated in determining the rotary position.