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:
Feb. 11, 1997
Filed:
Dec. 27, 1993
Applicant:
Inventors:
Kiyoshi Kawamura, Shizuoka, JP;
Yasutoshi Kaneko, Shizuoka, JP;
Assignee:
Yamaha Corporation, , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G10D / ;
U.S. Cl.
CPC ...
84171 ; 84220 ; 84239 ;
Abstract
A piano-like keyboard instrument allowing a player to perform in either an acoustic sound mode and or an electronic sound producing mode. In the electronic sound producing mode, a stopper blocks sets of piano strings from hammers and an electronic sound producing unit generates electronic sounds. A key touch is maintained in the electronic sound producing mode. A gap regulating unit changes gaps between the toes of jacks and regulating buttons, depending upon which mode of operation is selected. Hammer shanks rebound on the stopper after the escapes of the jacks.