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:
May. 07, 2002
Filed:
May. 19, 1999
Charles Raymond Lee, Placerville, CA (US);
Overture Music Systems, Inc., Orangevale, CA (US);
Abstract
A method and apparatus for measuring and recording keyboard motion in which an array of magnets and sensors capture key movement with high accuracy. This method uses a non-contact sensing and assembly technique that requires no mechanical or electrical connections with the entire keyboard assembly, thus making installation and servicing easier, as there are no cables or other devices required to connect or remove from the keyboard. This method also uses a mathematical algorithm to adjust for sensor distance variation (from the sensor to the key), allowing for high accuracy over the entire keyboard. Finally, this method allows for sideways keyboard movement (soft pedal in grand and some vertical pianos), without affecting the sensor readings.