US PATENT SUBCLASS 84 / 348
.~.~.~ Valve tremolos

Current as of: June, 1999
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84 /   HD   MUSIC

1  DF  INSTRUMENTS {9}
330  DF  .~ Wind {5}
331  DF  .~.~ Pipe organs {4}
348.~.~.~ Valve tremolos

DEFINITION

Classification: 84/348

A vibrating valve produces an irregularity in the flow of air and so in loudness of the sound.

(1) Note. Compare this class, subclass 374.