Action for piano

Details Action for piano Action for piano

2007-10-09

2007-10-09

Lockett, Kimberly (Department: 2837)

Music

Accessories

Reexamination Certificate

active

11372596

ABSTRACT:
An action for a piano is provided for clarifying a timing of let-off, improving the sequential touching capabilities, and consequently realizing high playing performance excellent in expressive power in a simple structure without adversely affecting the key touch feeling. The action for a piano swings a hammer in response to a touch on a key, and comprises a wippen pushed up by the key to pivotally move, a regulating button having a flat jack contact surface on the lower end, and a jack having a flat regulating button contact surface which comes into contact with the jack contact surface as the key is depressed. The jack comprises a molding made of a thermoplastic resin containing long fibers for reinforcement.

REFERENCES:
patent: 1351512 (1920-08-01), Goble
patent: 2542306 (1951-02-01), Brown
patent: 2571298 (1951-10-01), Thurston et al.
patent: 3583271 (1971-06-01), Corwin et al.
patent: 4685371 (1987-08-01), Levinson
patent: 4953433 (1990-09-01), Fandrich et al.
patent: 5272950 (1993-12-01), Petersen
patent: 2002/0189422 (2002-12-01), Yoshisue et al.
patent: 174390 (1922-01-01), None
patent: 816350 (1959-07-01), None
patent: 2 256 522 (1992-12-01), None
patent: 06-083326 (1994-03-01), None

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