Keyboard assembly for forming keyboard apparatus of electronic m

Details Keyboard assembly for forming keyboard apparatus of electronic m Keyboard assembly for forming keyboard apparatus of electronic m

1988-09-02

1990-04-10

Witkowski, Stanley J.

Music

Instruments

General features

84DIG7, 200 5A, G10C 312, G10H 134

Patent

active

049149997

ABSTRACT:
A keyboard assembly for forming a keyboard apparatus of an electronic musical instrument, including a combination of at least two key units each having a plurality of key members and an elongated bracket portion connecting the key members together, a frame structure to which the key units are assembled together in such a manner that each of the individual key members of the key units is allowed to rock independently of each other about an axis fixed with respect to the frame structure and parallel with the bracket portion of each key unit, and plural combinations of a concavity formed in the bracket portion of one of the key units and a projection formed in the bracket portion of the other of the key units and received in the concavity for establishing a first predetermined positional relationship between each of the key units before the key units are assembled to the frame structure.

REFERENCES:
patent: 1853630 (1932-04-01), Martenot
patent: 3570359 (1971-03-01), Ohno
patent: 4186638 (1980-02-01), Iijima
patent: 4272657 (1981-06-01), Iijima

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