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:
Sep. 02, 1997
Filed:
Apr. 10, 1996
Applicant:
Inventors:
Nobuo Sugiyama, Shizuoka, JP;
Haruki Uehara, Shizuoka, JP;
Assignee:
Yamaha Corporation, , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G10F / ; G10H / ; G10H / ;
U.S. Cl.
CPC ...
84 21 ; 84-3 ; 84171 ; 84658 ; 84719 ;
Abstract
A keyboard musical instrument is fabricated on the basis of an acoustic piano, and a hammer stopper and solenoid-operated actuators are provided for hammer assemblies and black and white keys; and a controller instructs the solenoid-operated actuators to move the black and white key at different velocities depending upon the position of the hammer stopper, and causes the acoustic piano to give little offense to the ear at a blocking position of the hammer stopper.