Patent ID: 6380469
Filing Date: 2002-04-30
Classification: G09B,G10F,Y10S

Abstract:
A keyboard musical instrument comprisinga keyboard having plural keys movable between rest positions and end positions, plural mechanisms connected to said plural keys and selectively actuated by the keys moved from the rest positions to the end positions, plural key actuators having respective moving members associated with said plural keys and movable between retracted positions and projected positions for moving said plural keys from said rest positions to said end positions, plural key sensors associated with said plural keys for detecting transit of terminative points on the way between said rest positions and said end positions for producing detecting signals, and a controller connected to said plural key actuators and said plural key sensors, selectively activating said plural key actuators so as to move said moving members from said retracted position toward said projected positions and responsive to said detecting signals for stopping said moving members at intermediate positions on the way to said projected positions.