US PATENT SUBCLASS 84 / 37
.~.~.~.~.~.~.~.~ Position controlled from reservoir

Current as of: June, 1999
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84 /   HD   MUSIC

1  DF  INSTRUMENTS {9}
*  DD  .~ Automatic {13}
7  DF  .~.~ Stringed {4}
13  DF  .~.~.~ Pianos {5}
24  DF  .~.~.~.~ Pneumatic type {10}
33  DF  .~.~.~.~.~ Expression mechanism {8}
34  DF  .~.~.~.~.~.~ Parts of piano moved {1}
35  DF  .~.~.~.~.~.~.~ Rest rail shifted {3}
37.~.~.~.~.~.~.~.~ Position controlled from reservoir

DEFINITION

Classification: 84/37

The rest-rail is automatically shifted as the wind-pressure in the reservoir varies.