Piano soundboard and method of making same
AssigneeThe Wurlitzer Company
InventorsStanley A. Grajek, Robert S. Hill, George S. Klaiber
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Abstract
A soundboard for a piano comprises three plies of wood bonded together, the front and back plies being of substantially equal thickness and the center ply being of a thickness greater than the sum of the thicknesses of the front and back plies. The center ply comprises a plurality of elongate boards each having a preselected curvature from side-to-side, these boards are bonded together edge-to-edge with the curvature of each board in the same direction to form a composite board having a substantially continuous curvature, concave on one side and convex on the other side. Consequently, the assembled, three-ply soundboard has a curvature imparted thereto by the center ply.
Claims5
A method of building a soundboard for a piano, comprising:
- selecting a plurality of elongate boards, each having a predetermined curvature from side-to-side and bonding the elongate boards together edge-to-edge with the curvature of each board facing in the same direction to form a composite board having a substantially continuous curvature, concave on one side and convex on the other side, bonding a further ply of wood to each of said concave and convex sides of said composite core board, each of said additional plies of wood being of substantially equal thickness, but less than one-half the thickness of the composite core board, whereby the assembled, three-ply soundboard has a curvature imparted thereto by said composite core board.
Dependencies are inferred from the claim text.