Back to results
US 6,380,469 B2Granted
Keyboard musical instrument equipped with key actuators accurately controlling key motion
AssigneeYamaha Corporation
InventorHaruki Uehara
Life of this patent
Estimating the term…
Abstract
A keyboard musical instrument is equipped with solenoid-operated key actuators for guiding a player in fingering on the keyboard, and the solenoid-operated key actuators stop the keys at terminative positions on the way to the end positions, wherein key sensors supplies detecting signal representative of the keys reaching the terminative positions to a controller so that the controller removes the driving signals from the solenoid-operated key actuators immediately before the escape of jacks from the hammers.
Claims17
A keyboard musical instrument comprising
- a 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.
2 more elements
A keyboard musical instrument comprising
- a keyboard having plural keys movable between respective rest positions and respective end positions,
- plural action mechanisms respectively linked with said plural keys and selectively actuated by the associated keys moved from the rest positions toward the end positions,
- plural hammers respectively linked with said plural action mechanisms and driven for free rotation by the associated action mechanisms after escape of said associated action mechanisms therefrom,
- plural sets of strings struck with said plural hammers at an end of said free rotation for producing tones,
- an electronic system including
- plural key actuators having respective moving members respectively associated with said plural keys and selectively energized for moving said moving members from respective retracted positions toward respective projected positions, thereby moving said plural keys from said rest positions toward said end positions,
- plural key sensors respectively associated with said plural keys and detecting said associated keys in reaching terminative positions on the way from said rest positions to said end positions for producing detecting signals and
- a controller supplied with pieces of music data information representative of keys to be moved for guiding a human trainee in fingering on said keyboard, selectively energizing said plural key actuators in accordance with said pieces of music data information and responsive to said detecting signals so as to stop the moving members at intermediate positions on the way to said projected positions.
5 more elements
Dependencies are inferred from the claim text.