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US 6,649,821 B2Granted
Keyboard musical instrument equipped with key-touch regulator provided between keys and stationery member
AssigneeYamaha Corporation
InventorSatoshi Inoue
Life of this patent
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Abstract
A grand piano have a keyboard implemented by white and black keys selectively depressed by a player for specifying the notes of tones to be generated, and action units are linked with the white and black keys so as to give rise to free rotation of associated hammers through escape, wherein a key-touch regulator is provided between the key frame and the white and black keys for partially canceling the moment initially exerted on the white and black keys due to the self-weight of the action units and the hammers so that any lead weights is not required for regulating the key-touch.
Claims20
A keyboard musical instrument comprising:
- an array of keys selectively moved with respect to a stationary board by a human player;
- a driven mechanism including plural units respectively linked with the keys of said array so as to be selectively actuated by the associated keys and exerting initial loads to said keys, respectively;
- and
- a touch-regulator having plural elastic force generating units provided between said keys and said stationary board and exerting elastic forces to said keys over the full strokes of said keys so as to cancel parts of said initial loads.
1 more element
Dependencies are inferred from the claim text.