Keyboard apparatus in electronic musical instrument

Details Keyboard apparatus in electronic musical instrument Keyboard apparatus in electronic musical instrument

1982-12-03

1984-10-16

Griffin, Donald A.

Music

Instruments

General features

84440, G10C 312

Patent

active

044767692

ABSTRACT:
A keyboard apparatus for an electronic musical instrument is arranged that a return spring provided on each key for imparting the key a returning habit from a depressed state is comprised of either a leaf spring, a coil spring or a rod-like spring which is compressed lengthwise to be used in a buckling-deformed state, whereby warping of the spring is minimized, and the spring is allowed to progressively increase its curving after once developing the buckling without the need of increasing the compression load, thereby progressively reducing the reaction force of the spring. Thus, as the key is depressed deeper, there is obtained a lighter sense of key touch, and thereby a key touch resembling that of a piano is obtained.

REFERENCES:
patent: 2228141 (1941-01-01), Magnante
patent: 2565239 (1951-08-01), Kostka
patent: 3570359 (1971-03-01), Ohno

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