Patent ID: 7238868
Filing Date: 2007-07-03
Classification: G10F

Abstract:
1. A method for retrofitting an acoustic keyboard musical instrument including a tone generating mechanism for producing tones and keys linked with said tone generating mechanism, movable over a bottom board and having certain end portions brought into contact with a rear rail extending on a first portion of said bottom board to an automatic player keyboard, the method comprising: a) preparing a tool and an automatic playing system including a controller, an actuator holder and plural actuators having respective plungers and respective converters to be connected to said controller for converting a certain sort of energy to a force to be exerted on said plungers; b) determining hole-forming portions of a second portion of said bottom board, said second portion being equal in thickness to the first portion, said bottom board having a surface from which a side wall extends; c) forming holes through said hole-forming portions by using said tool; d) moving said plural actuators to a space under said second portion of said bottom board; e) aligning said plungers fitted to said actuator holder with said holes through an alignment work carried out, once; f) lifting said plural actuators toward said bottom board so that said plungers are exposed to a space over said second portion of said bottom board through said holes, whereby said plungers get ready to exert force on said tone generating mechanism; and g) securing said actuator holder to said case so that said actuators are provided in said space below said second portion of said bottom board.