Butterfly valve for accordions and its dynamic connection with t

Details Butterfly valve for accordions and its dynamic connection with t Butterfly valve for accordions and its dynamic connection with t

1983-05-09

1986-04-22

Fuller, Benjamin R.

Music

Instruments

Wind

84 60, G10D 1100

Patent

active

045834415

ABSTRACT:
In a rectangular frame on the accordion box (CA) in correspondence with a single continuous opening (2), a butterfly closure member (3) is pivotally mounted on a fulcrum, and is held in a closed position with a spring (7). A block (9), pushed forward by the lever arm of a white key (B), presses on sliding with its inclined plane (10) against a peg (8) of the pivoted butterfly closure member (3) of any valve operated by the white key to open it. A black key (N) acts directly an a peg (8') of the pivoted butterfly closure member (3') of any valve operated by a black key, to open it.
Specialized labor is eliminated; assembly times are reduced by 50%; the seal of the valves and the sound of the instrument are considerably improved (FIG. 1).

REFERENCES:
patent: 1737839 (1929-12-01), Glass
patent: 2035683 (1936-03-01), Zordan
patent: 2730919 (1956-01-01), Iorio

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