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:
Mar. 04, 2008
Filed:
Nov. 29, 2004
Shu Eitaki, Hamamatsu, JP;
Shu Eitaki, Hamamatsu, JP;
Kabushiki Kaisha Kawai Gakki Seisakusho, Hamamatsu-shi, JP;
Abstract
Provide an automatic musical performance device, which is capable of giving a concert magic function in an acoustic instrument with a feeling of normally playing the acoustic instrument. A time period Tv between two points, and a tempo Tmp found based on a time intervals between two-point detection and later two-point detection, are found based on detection signals at the two points and later detection signals at the two points; and a delay time fD(Tv), which is from reception of each operating signal by a solenoid activating circuitto commencement of a musical performance of an acoustic piano by the circuit, and a velocity value fv(Tv, Tmp) are found based on functions. A time period Ta, which starts at the time of later detection Sin two-point detection as a reference and ends when a leveris inverted, is found as fa(Tv) based on a function. Each operating signal is transmitted to the solenoid activating circuitunder such timing control that a transmission timing Ton comes at a time of lapse of 'fa(Tv)−fD(Tv)' sec after the later detection; and the velocity value is set at fv(Tv, Tmp).