Keyboard musical instrument and action unit incorporated therein
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United States of America Patent
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Oct 5, 2010
Issued Date -
N/A
app pub date -
Nov 21, 2008
filing date -
Jan 8, 2008
priority date (Note) -
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Abstract
A grand piano has action units for driving hammers to rotate toward strings, and each action unit is equipped with a repetition mechanism; the repetition mechanism has an elastic guide plate instead of a repetition lever and a repetition spring; and the elastic guide plate per se is deformed after contact with a drop screw, and returns to the initial position for permitting a pianist to play a music tune through repetition of key when the pianist releases the depressed key, whereby the action unit becomes simpler in structure than the conventional action unit.
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