Musical tone control device for electronic keyboard instrument

Details Musical tone control device for electronic keyboard instrument Musical tone control device for electronic keyboard instrument

1994-12-23

1996-11-26

Witkowski, Stanley J.

Music

Instruments

Electrical musical tone generation

84690, 84719, 84720, 84DIG7, G10H 1055, G10H 134

Patent

active

055787827

ABSTRACT:
An musical tone control device, employed by an electronic keyboard instrument, comprises a keyboard frame, a stopper member and a sensor. The keyboard frame is located beneath an arrangement of keys in the keyboard and is provided to support the keys in a vertical direction as well as in a horizontal direction. The key is normally pressed upward by a key-return spring. The stopper member comprises a base part, a flexible part, having flexibility In a selected direction, and an edge portion which are assembled together. The base part is fixed to the keyboard frame. The edge portion of the stopper member provides at least a lower-limit stopper for the key. The sensor is attached to the flexible part so as to sense a deformation of the stopper member in the selected direction. An output of the sensor is used to control a musical tone in terms of a specific musical parameter such as pitch. When the key is moved vertically so as to depress down the lower-limit stopper, the stopper member is vertically deformed so that the sensor senses a vertical deformation of the stopper member. When the key is moved horizontally, a horizontal motion of the key is transmitted to the stopper member through a key guide, which is provided to regulate the horizontal motion of the key, so that the sensor senses a horizontal deformation of the stopper member. The sensor is configured by a strain gauge or the like.

REFERENCES:
patent: 1853630 (1932-04-01), Martenot
patent: 4468999 (1984-09-01), Bonanno
patent: 5164532 (1992-11-01), Ishii et al.
patent: 5192820 (1993-03-01), Kawamura et al.
patent: 5406875 (1995-04-01), Tamai et al.

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