Music – Instruments – Stringed
Patent
1995-05-30
1997-07-08
Spyrou, Cassandra C.
Music
Instruments
Stringed
84220, 84171, G10C 300
Patent
active
056463596
ABSTRACT:
A silencing apparatus is provided for pianos having an electronic sound source as well as the conventional acoustic sound mechanism. The silencing apparatus includes a plurality of arms, a stop rail bridging ends of the arms and a positioning mechanism. When acoustic sound is to be silenced, a wire is pulled by means of an operating lever, thereby pivoting an actuating lever which is connected to one of the arms. This causes the stop rail to pivot to the stop position at which the stop rail abuts against and thereby stops motion of the hammer shanks which move in response to key depressions. The stop rail and the arms thereon define open spaces for accommodating for the presence of the other components, such as damper units, inside the piano. Thus, the silencing apparatus of the present invention travels over a greater range of motion without interfering with the operation of other components inside the piano.
REFERENCES:
patent: 511747 (1894-01-01), Bettendorf
patent: 686251 (1901-11-01), Busenbury
patent: 3640171 (1972-02-01), Giglio
patent: 5374775 (1994-12-01), Kawamura
Abe Kiyoshi
Kihara Tsutomu
Kabushiki Kaisha Kawai Gakki Seisakusho
Spyrou Cassandra C.
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