Rotary sound path selector valve with biased rotor

Details Rotary sound path selector valve with biased rotor Rotary sound path selector valve with biased rotor

1988-11-08

1990-03-06

Franklin, Lawrence R.

Music

Instruments

Wind

G10D 904

Patent

active

049055640

ABSTRACT:
A rotary valve coupled into the principal sound path of a musical wind instrument for selectively inserting and removing one or more acoustic pipe segments from the sound path is disclosed. The valve includes a tapered housing enclosing a tapered lightweight rotor having at least one acoustic passage therethrough. The rotor is comprised of first and second axially coupled portions separated by a biasing spring tending to axially urge the portions apart. Each rotor acoustic passage is coupled inside the rotor to the rotor portions so as to permit the rotor portions to be axially separated from each other a predetermined distance while preserving the airtight seal between the rotor acoustic passage and each rotor portion. Hence, the rotor is axially self-adjusting in the valve housing, maintaining seal integrity of rotor apertures to housing apertures without periodic maintenance or adjustment.

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