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:
Jul. 13, 1976
Filed:
Oct. 03, 1974
Albert E Sanderson, Carlisle, MA (US);
Inventronics, Inc., Carlisle, MA (US);
Abstract
A method for tuning a piano or other instrument. A characteristic stretch is measured using a tuning instrument which compares an internally generated reference signal and the corresponding partial of a note from the instrument and indicates the instantaneous phase difference between the two. A reference note in the instrument (e.g., the 440 Hz 'A') is tuned to a standard frequency for the scale. Then, using the characteristic stretch, the deviation from a reference scale frequency for each successive note is determined and each note is tuned to a frequency which is the sum of the reference scale frequency and corresponding deviation for that note. In one particular embodiment, the stretch correction, Y(n,N), in cents is based upon the following:
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile