Action mechanism for the piano

Details Action mechanism for the piano Action mechanism for the piano

1989-08-24

1991-02-26

Brown, Brian W.

Music

Instruments

Stringed

G10C 318

Patent

active

049952919

ABSTRACT:
An action mechanism for the piano in which a jack is resiliently and rotatably mounted on a rear portion of a key, a jack receiver and a push-out protrusion are provided on a hammer support member that is rotatably mounted at its one end on a hammer shank rail via a flange over the key, and when the key is depressed, the hammer is turned toward the sound producing member owing to the engagement of the tip of said jack and said jack receiver and, at the same time, the engagement between the jack and the jack receiver is released by the push-out protrusion.

REFERENCES:
patent: 210223 (1898-11-01), Plass
patent: 237797 (1881-02-01), Ammon
patent: 658284 (1900-09-01), Schoenhut
patent: 1404428 (1973-07-01), Newman et al.
patent: 1423024 (1922-07-01), Roberts
patent: 1866153 (1932-07-01), Cameron, Jr.
patent: 2280982 (1942-04-01), Schulze
patent: 3554071 (1971-01-01), Klaiber
patent: 3621105 (1971-11-01), Takamatsu
patent: 3651732 (1972-03-01), Erbert et al.
patent: 4685371 (1987-08-01), Levinson
patent: 4774868 (1988-10-01), Finholm

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