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. 19, 1991
Filed:
May. 29, 1990
Applicant:
Inventor:
Eric de Buda, Toronto, Ontario, CA;
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G10C / ; G10G / ;
U.S. Cl.
CPC ...
84200 ; 84458 ; 84454 ; 84455 ; 84DI / ;
Abstract
A system for tuning pianos and other string instruments utilizes a clamp-on probe with a feedback loop to induce a controlled vibration of the string and its natural frequency of vibration. This frequency is electronically compared to an accurate reference frequency. An associated electronic circuit controls an electric motor driven mechanism which adjusts the string tension until the correct frequency is achieved.