Keyboard apparatus of electronic musical instrument

Details Keyboard apparatus of electronic musical instrument Keyboard apparatus of electronic musical instrument

1987-10-05

1990-02-20

Prescott, A. C.

Music

Instruments

84DIG7, 84440, 84433, 200 5A, G10H 300, G10C 312, H01H 926

Patent

active

049016148

ABSTRACT:
A keyboard apparatus of an electronic musical instrument includes keys, mass members, and springs. Each key can pivot about a first pivot fulcrum. Each mass member can pivot about a second pivot fulcrum. Each spring supplies a biasing force to at least the corresponding mass member so that the mass member returns to an initial state. In this apparatus, each key has a point of application for pivoting the corresponding mass member in the same direction as a pivoting direction of each key when each key is depressed.

REFERENCES:
patent: 2996942 (1961-08-01), Jewett
patent: 4079651 (1978-03-01), Matsui
patent: 4375179 (1983-03-01), Schwartz et al.
patent: 4562764 (1986-01-01), Marshall
patent: 4668843 (1987-05-01), Watanabe et al.
patent: 4679477 (1987-07-01), Monte
Japanese Utility Model Publication No. Sho 59-21423.
Japanese Patent Laid-Open Specification No. Sho 57-147691.
Japanese Utility Model Laid-Open Specification No. Sho 59-51393.

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