Electronic piano

Details Electronic piano Electronic piano

1996-09-26

2000-07-11

Nappi, Robert E.

Music

Instruments

General features

G10D 1302

Patent

active

060875747

ABSTRACT:
To provide an electronic piano maintaining a compact appearance and providing the key touch equivalent to that of an acoustic piano. A hammer equivalent member is composed of a butt, a L-shaped member and a catcher shank. When the butt is pushed up by a jack responsive to the key depression, the hammer equivalent member starts rotating in a direction reverse to the rotary direction of a depressed key. Subsequently, after the jack leaves the butt, the hammer equivalent member continues to be rotated inertially. By contacting the projection of the L-shaped member of the hammer equivalent member, a stopper stops the inertial movement of the hammer equivalent member. The hammer equivalent member is almost equivalent to the hammer assembly of the usual acoustic piano in inertial moment and the angle formed by the center of gravity relative to a virtual perpendicular passing a center pin. Furthermore, the hammer equivalent member is shorter than the hammer assembly in appearance.

REFERENCES:
patent: 5386083 (1995-01-01), Kawamura
patent: 5463184 (1995-10-01), Kawamura
patent: 5796023 (1998-08-01), Kumano et al.
patent: 5945617 (1999-08-01), Niitsuma
patent: 5949013 (1999-09-01), Satoshi

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