Keyboard apparatus with white keys and black keys having action

Details Keyboard apparatus with white keys and black keys having action Keyboard apparatus with white keys and black keys having action

1996-05-16

1998-08-18

Gellner, Michael L.

Music

Instruments

General features

84439, G10C 312

Patent

active

057960232

ABSTRACT:
A keyboard apparatus has a first frame (support member), and a keyboard including a plurality of white keys and black keys, each of the keys having a fulcrum and movably about the fulcrum with respect to the support member. Each of the black keys has an extension section connected to one end of each of the black keys. The extension section extends under operation sections of two adjacent white keys toward the free ends of the white keys. A white key driving section is provided adjacent to a free end portion of each of the white keys. A black key driving section is provided adjacent to a free end portion of each of the extension sections. The white key driving sections and the black key driving sections are located at substantially the same distance from their respective fulcrums, and drive movable sections such as mass body assemblies (action members) or key switches that are operated in association with the corresponding white keys and the black keys.

REFERENCES:
patent: 3570359 (1971-03-01), Ohno
patent: 3903780 (1975-09-01), Aliprandi
patent: 4248130 (1981-02-01), Erickson et al.
patent: 4901614 (1990-02-01), Kumano et al.
patent: 5081895 (1992-01-01), Katsuta
patent: 5243125 (1993-09-01), Yamaguchi
patent: 5571983 (1996-11-01), Yamaguchi et al.

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