Upright piano equipped with coupling units for horizontally supp

Details Upright piano equipped with coupling units for horizontally supp Upright piano equipped with coupling units for horizontally supp

1992-07-10

1993-11-09

Gellner, Michael L.

Music

Instruments

General features

G10C 312

Patent

active

052592871

ABSTRACT:
It is important for an upright piano to keep a keyboard on a key bed horizontal, and the key bed is supported by a frame through coupling units, wherein each of the coupling units has a wedged member interposed between a projection of the frame and a bracket of the coupling unit or between the bracket and the key bed for regulating the horizontality of the keyboard.

REFERENCES:
patent: 217828 (1879-07-01), Steinway
patent: 745509 (1903-12-01), Muller
patent: 4127051 (1978-11-01), Conklin, Jr.

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