| US 7,541,530 B2 | ||
| Tone plate for keyboard-type tone plate percussion instrument, tone plate fabricating method, tone generator unit of tone plate percussion instrument, and keyboard-type percussion instrument | ||
| Norishige Terada, Hamamatsu (Japan) | ||
| Assigned to Yamaha Corporation, Shizuoka-Ken (Japan) | ||
| Filed on Dec. 13, 2006, as Appl. No. 11/610,018. | ||
| Claims priority of application No. 2005-359315 (JP), filed on Dec. 13, 2005; application No. 2005-359317 (JP), filed on Dec. 13, 2005; and application No. 2005-359318 (JP), filed on Dec. 13, 2005. | ||
| Prior Publication US 2007/0131092 A1, Jun. 14, 2007 | ||
| Int. Cl. G10D 13/08 (2006.01) | ||
| U.S. Cl. 84—403 [84/402; 84/404; 84/410; 84/423 R; 84/427; 84/428; 84/438; 84/439] | 4 Claims |
| 1. A tone plate for use in a keyboard-type tone plate percussion instrument, comprising:
a longitudinal central portion;
first and second ends;
first and second supported portions respectively located at first longitudinal locations in the tone plate which are closer
to said first and second ends than to said longitudinal central portion and at each of which a vibration node can be formed;
first and second mass concentrating portions extending toward said first and second ends from second longitudinal locations
in the tone plate on sides of said first and second ends with respect to said first and second supported portions, respectively,
said first and second mass concentrating portions not including said first and second supported portions, respectively; and
first and second thinner portions respectively provided between said longitudinally central portion and said first supported
portion and between said longitudinally central portion and said second supported portion,
wherein the tone plate is made of a single material and formed into one piece, the tone plate vibrating to generate a musical
tone of a specific tone pitch when it is struck with being supported at said first and second supported portions thereof.
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