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:
Jan. 10, 1989
Filed:
Nov. 18, 1987
Masaaki Mizuguchi, Hamamatsu, JP;
Hirohisa Kuroyanagi, Hamamatsu, JP;
Yamaha Corporation, Shizuoka, JP;
Abstract
An electronic tuning apparatus is constructed of an input device for inputting a tone signal to be measured, a signal generating circuit for generating a plurality of reference frequency signals, respectively, corresponding to a plurality of tone names independently for each tone name, a plurality of display devices, respectively, corresponding to a plurality of tone names and a plurality of display control devices, respectively, corresponding to a plurality of tone names. To the signal generating circuit, a scale selecting switch and a pitch adjustor are connected. Each display control device is constructed so as to display an agreement of the frequency of said tone name at a predetermined octave with the frequency of said input tone signal in the display device corresponding to said tone name. The display is realized by an on-off arrangement pattern composed of a plurality of turned-on luminous elements and a plurality of turned-off luminous elements. According to the electronic tuning apparatus of the present invention, it is not necessary to take a lot of time and labor for changing-over an octave and a tone name and, as the measurement results are displayed at once after a tone to be measured is inputted, a tuning for each tone name can be performed easily and quickly. Furthermore, a tuning, based on the equal temperament scale and the just intonation scale, is possible.