Music – Instruments – General features
Patent
1986-01-21
1987-05-26
Franklin, Lawrence R.
Music
Instruments
General features
84433, G10C 312
Patent
active
046675639
ABSTRACT:
A key apparatus is provided in which the resistance of the keys to being depressed is such that the touch feeling of a real piano key is simulated. A key is pivotally mounted so that rotation is performed in response to depression. A weighted lever and a weight embedded in the key serve to urge the key in the opposite rotational direction. A deformable element is arranged so that it contacts the key after the key has been depressed a predetermined distance. The resistance of the deformable element to being deformed initially increases as the key is depressed beyond the predetermined distance, and then decreases as the key is depressed further.
REFERENCES:
patent: 2848920 (1958-08-01), Lester
patent: 4217803 (1979-01-01), Dodds
patent: 4375179 (1983-03-01), Schwartz et al.
patent: 4479415 (1984-10-01), Haberstumpf
Miyano Masaji
Wakuda Katsumi
Franklin Lawrence R.
Kabushiki Kaisha Kawai Gakki Seisakusho
Meller Michael N.
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