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:
Nov. 02, 2021
Filed:
Jul. 31, 2018
William R. Benner, Jr., Sorrento, FL (US);
William R. Benner, Jr., Sorrento, FL (US);
Other;
Abstract
A rotary position detector includes a housing having an inner space having a reflective element. A light source emits light rays into the inner space. A base supports a light detector assembly having a first number of toroidal-sector-shaped light sensors arranged circumferentially about a motor shaft axis, is, one 'Cosine +' detector element, one 'Cosine −' detector element, one “Sine +” detector element, and one “Sine −” detector element. A light blocker positioned between the light source and the light sensors rotates with the shaft. The light blocker includes a second number of opaque, equal-surface-area elements arrayed about the axis, the second number equal to one-half the first number. A circuit measures a signal from the detectors relating to an amount of light falling thereon, a difference related to an angular position of the motor shaft.