Keyboard apparatus for acoustic pianos

Details Keyboard apparatus for acoustic pianos Keyboard apparatus for acoustic pianos

1997-09-29

1999-04-13

Sircus, Brian

Music

Instruments

General features

84430, G10C 312

Patent

active

058940995

ABSTRACT:
A keyboard apparatus for an acoustic piano having strings includes keys, a key bed supporting the keys such that they are turnable thereon, an action mechanism arranged at a rear end portion of each of the keys which operates in a manner interlocked with key depression to strike the associated string to generate a musical tone, and a key sensor switch mounted on the key bed for generating key depression information of the keys. The key sensor switch is formed by a rubber switch, and removably mounted on the key bed. Alternatively, the key sensor switch is movably mounted on the key bed such that the key sensor switch can be moved between a detecting position in which the key sensor switch can be depressed by any key depressed, and a non-detecting position in which the key sensor switch cannot be depressed by any key depressed.

REFERENCES:
patent: 4272657 (1981-06-01), Iijima
patent: 5386083 (1995-01-01), Kawamura

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