Key depression detection apparatus for keyboard instrument

Details Key depression detection apparatus for keyboard instrument Key depression detection apparatus for keyboard instrument

2005-01-25

2005-01-25

Donels, Jeffrey W (Department: 2837)

Music

Instruments

Electrical musical tone generation

Reexamination Certificate

active

06846982

ABSTRACT:
A key depression detection apparatus is constituted by a sensor case incorporating key sensors, which can be easily adjusted in positions relative to an arrangement of keys on a keyboard frame (or a keybed) in a keyboard instrument such as a piano. The sensor case has a case body incorporating a key sensor and is affixed to a base member that is fixed to the keyboard frame by using a fixing member, which is constituted by a lower member and a pair of upper members. The legs of the case body are securely held by the fixing member between the lower member and upper members, which are connected together using screws accompanied with springs. Thus, an operator can easily adjust the sensor case in position relative to an arrangement of keys by manually controlling screws.

REFERENCES:
patent: 5237125 (1993-08-01), Fields
patent: 5546842 (1996-08-01), Pimentel
patent: 5719347 (1998-02-01), Masubuchi et al.
patent: 6712323 (2004-03-01), Cheung et al.
patent: 8-278780 (1996-10-01), None
patent: 8-314461 (1996-11-01), None

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