Piano action device for electronic keyboard musical instruments

Details Piano action device for electronic keyboard musical instruments Piano action device for electronic keyboard musical instruments

1989-12-22

1991-11-05

Shoop, Jr., William M.

Music

Instruments

Electrical musical tone generation

84439, 84440, 84DIG7, G10C 312, G10H 134

Patent

active

050623427

ABSTRACT:
A piano action device for electronic keyboard musical instruments includes a key arranged on a keyboard chassis so as to be swingable up and down, a first hammer arm swung in response to the depression of the key, switch unit for indicating a start of generating musical sounds to be generated when it is pushed, and a second hammer arm swung in response to the swinging of the first hammer arm to push the switch unit.

REFERENCES:
patent: 3101640 (1963-08-01), Hartman
patent: 3634593 (1972-01-01), Nagano
patent: 3903780 (1975-09-01), Aliprandi
patent: 3927594 (1975-12-01), Morita
patent: 4286493 (1981-09-01), Hardesty et al.
patent: 4314494 (1982-02-01), de Vries
patent: 4679477 (1987-07-01), Monte
patent: 4723471 (1988-02-01), Sugimoto
patent: 4913026 (1990-04-01), Kaneko et al.

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