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. 25, 1997
Filed:
Sep. 12, 1996
Applicant:
Inventors:
Assignee:
Yamaha Corporation, , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G10F / ; G10F / ; G10G / ;
U.S. Cl.
CPC ...
84 21 ; 84115 ; 84462 ;
Abstract
An automatic player piano controls a solenoid-operated key actuator so as to move a key along a quadratic curve around a turning point where the key changes the direction of the motion, and the solenoid-operated key actuator faithfully reproduce a half stroke key motion.