Title: Piano soundboard and method of making same

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.

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Inventors: Grajek, Stanley A. (DeKalb, IL)
Hill, Robert S. (Holly Springs, MS)
Klaiber, George S. (Tonawanda, NY)

Application Number: 06/390293
Filing Date: 1982-06-21
Publication_date: 1983-07-05
Assignee: WURLITZER CO

Primary Class(es): 84/196 984/58, 84/192
Other Classes: B27D1/08; B32B21/13; G10C3/06; B27D1/00; B32B21/00; G10C3/00; G10C3/06
US Patent Ref:

1694789	December, 1928	Muckey	84/194	Piano
2070391	February, 1937	Bilhuber	84/192	Soundboard for pianos
2469522	May, 1949	Sauerland	84/192	Piano soundboard
3643539	February, 1972	Andersen	84/195	TONE-BALANCING RIB MEMBER

Other Refs: DE2366585

May, 1923

84/192

Primary Examiner: Franklin, Lawrence R.
Assistant Examiner:
Attorney: Trexler, Bushnell & Wolters, Ltd.

Parent Case Data:

This application is a division of application Ser. No. 234,360, filed 2/13/81, now U.S