Piano key frame

Details Piano key frame Piano key frame

1977-09-19

1978-11-28

Franklin, Lawrence R.

Music

Instruments

General features

84432, 84434, 84439, G10C 312

Patent

active

041270517

ABSTRACT:
A piano key frame assembly comprising a rigid metal frame, preferably formed from aluminum tubing, for supporting the piano keys and action, the frame having a front rail, an intermediate balance rail and a back rail, the back rail mounting adjustment means for leveling the keys, the key frame having adjustable feet by means of which it is positioned and leveled within the piano case, the conventional key bed being replaced by relatively narrow key bed brackets extending along the opposite sides of the case on which the adjustable feet are supported, means being provided to align and maintain the key frame on the key bed brackets.

REFERENCES:
patent: 952509 (1910-03-01), Caulfield
patent: 2505805 (1950-05-01), Stein
patent: 3072005 (1963-01-01), Quitter et al.
patent: 3381576 (1968-05-01), Johnson

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