Upright piano with key action mechanism responsive to repetition

Details Upright piano with key action mechanism responsive to repetition Upright piano with key action mechanism responsive to repetition

1993-08-24

1994-10-11

Gray, David M.

Music

Instruments

Stringed

84240, 84243, G10C 318

Patent

active

053536711

ABSTRACT:
A key action mechanism incorporated in an upright piano is accompanied with a repetition mechanism having a repetition lever rotatably supported by a butt and pushed by a jack after an escape from the butt for producing a gap between a leading end thereof and a back check, therefore, the butt and, accordingly, hammer assembly can rotate backwardly over a predetermined angle due to the gap, after the striking or after the escape of the jack, and, as a result, the hammer assembly is prevented from double-strike.

REFERENCES:
patent: 4854211 (1989-08-01), Tanaka et al.
patent: 4860626 (1989-08-01), Tanaka et al.
patent: 4879939 (1989-11-01), Wall
patent: 4896577 (1990-01-01), Trivelas et al.
patent: 5042354 (1991-08-01), Trivelas et al.
patent: 5272950 (1993-12-01), Petersen

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