Structure of rotary valve assembly used in wind instrument

Details Structure of rotary valve assembly used in wind instrument Structure of rotary valve assembly used in wind instrument

1989-05-04

1990-11-20

Franklin, Lawrence R.

Music

Instruments

Wind

84392, G10D 904

Patent

active

049709321

ABSTRACT:
A rotary valve assembly incorporated in a brass instrument for changing a pitch of a tone comprises a rotary valve housed in a valve casing having two groups of aeroports, and the rotary valve is provided with two air passages, one of which interconnects the aeroports in the first group and the other of which interconnects one aeroport of the first group and one aeroport of the second group, so that various arrangements are possible for the aeroports.

REFERENCES:
patent: 1244745 (1917-10-01), King
patent: 2003995 (1935-06-01), Einhorn
patent: 3641863 (1972-02-01), Kanstul et al.
patent: 3973464 (1976-08-01), Novy
patent: 4112806 (1978-09-01), Thayer

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