| 摘要 |
In a piano action, a damper lever, pivoted intermediate thereof and with its damper biased toward the string, has a tab portion extending in the side opposite to the damper side. A sostenuto block, rotatably supported beside the tab portion, has a lip portion rotatable against a biasing force and resting on a stop. The rotation of the block causes the lip portion to come near and away from the tab portion. When the block is rotated while the damper is brought away from the string upon depression of the key, the lip portion catches the tab portion and prevents the damper from coming into contact with the string even after release of the depressed key so long as the block is in a rotated position, thus permitting the string struck by the hammer to continue its vibration so that a sustaining tone is obtained.
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