Music – Instruments – Wind
Patent
1996-06-12
1999-05-04
Shoop, Jr., William M.
Music
Instruments
Wind
84389, G10D 904
Patent
active
059005637
ABSTRACT:
A rotary valve (10) for a brass wind instrument includes a rotor (12) rotatably disposed in a casing (30). Four tube connecters (50) are connected to the casing in fluid-tight connections. Each tube connecter (50) has a passageway (52) therethrough having a constant, circular cross section. The rotar (12) has two ducts (14, 16) therethrough, each having a constant, circular cross section with a diameter (18) equal to the diameter of the passageways (52) through the tube connecters (50). The rotor (12) is selectively rotatable between an unactuated position and an actuated position. When the rotor (12) is in the unactuated position, a single soundpath (70) is formed through the valve. The single soundpath (70) has limited curvature and has a constant diameter. When the rotor (12) is in the actuated position, two soundpaths (72, 74) are formed through the valve (10). The first of the two soundpaths (72) subjects the sound to only a single 45 degree turn through the valve.
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Hsieh Shih-yung
Shoop Jr. William M.
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