Muting device of grand piano

Details Muting device of grand piano Muting device of grand piano

1991-05-28

1993-08-31

Witkowski, Stanley J.

Music

Instruments

Stringed

G10C 318

Patent

active

052399079

ABSTRACT:
A muting device for a piano includes a capstan screw, a support rail, a support, a jack, a shank rail, a hammer shank, a hammer and at least one string with respect to each key. Each key is divided into a back portion and a front portion with respect to the rotation axis. This front portion of the key is depressed by a performer, while the back portion of the key is inserted into a key driving mechanism of the grand piano. In addition, a transmitting member (e.g., another capstan screw) transmits force from the key to the hammer. The transmitting member is inserted between an upper surface of the key and a lower surface of the support. The transmitting member contacts the upper surface of the key between the capstan screw and a rotation center of the key, and it also contacts with the lower surface of the support between a position at which the capstan screw comes contacts the support and a position at which the jack is connected to the support. Using two capstan screws, it is possible to simulate the double action of the key of a grand piano. In non-key-depression state, a string striking stroke between the hammer and string is reduced to mute a piano sound.

REFERENCES:
patent: 1289449 (1918-12-01), Hussey
patent: 1392331 (1921-10-01), Hussey
patent: 4774868 (1988-10-01), Finholm
patent: 4856402 (1989-08-01), Alexander
patent: 4860626 (1989-08-01), Tanaka et al.
patent: 4953433 (1990-09-01), Fandich et al.

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