Key bed for a piano or the like

Details Key bed for a piano or the like Key bed for a piano or the like

1979-09-19

1981-12-08

Franklin, Lawrence R.

Music

Instruments

General features

84177, G10C 302

Patent

active

043041680

ABSTRACT:
A key bed for a piano or the like is comprised by a laminated structure having two outer layers of sheet steel and an intermediate layer of a wood product. The steel layers are bonded to the intermediate layer, and the intermediate layer is substantially thicker than the outer layers of steel to offset the outer layers from one another and thereby increase the stiffness of the key bed.

REFERENCES:
patent: 1618521 (1927-02-01), Eilert
patent: 2191443 (1940-02-01), Day et al.
patent: 2230928 (1941-02-01), Brasted
patent: 3477330 (1969-11-01), Bert
patent: 3774493 (1973-11-01), Yamada

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