Axial flow valve

Details Axial flow valve Axial flow valve

1982-05-21

1984-09-04

Franklin, Lawrence R.

Music

Instruments

Wind

84395, G10D 904

Patent

active

044690029

ABSTRACT:
A rotary valve for selectively inserting and removing a slide loop from the sound path of a musical instrument is disclosed. The valve includes a rotor having an outer surface portion that is substantially conical and also includes a casing with a substantially conical inner surface portion that receives the outer surface portion of the rotor. Two sound passages entending through the rotor are no more than slightly curved. These passages align axially with the instrument's lead pipe, main bore, and slide loop ends so that a minimum of undesired harmonics are added to the tone of the instrument due to presence of the valve in the sound path.

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"The French Horn", by R. Morley-Pegge, London/Ernst Benn Limited, New York/W. W. Norton & Company, Inc., pp. 25-29.
"A New Design Foundation for Brass-Wind Instruments" (published notes believed to be of a lecture delivered by Mark S. Veneklasen).

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