US PATENT SUBCLASS 73 / 1.32
.~.~.~ Prover bell

Current as of: June, 1999
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73 /   HD   MEASURING AND TESTING

1.01  DF  INSTRUMENT PROVING OR CALIBRATING {13}
1.16  DF  .~ Volume of flow, speed of flow, volume rate of flow, or mass rate of flow {12}
1.31  DF  .~.~ With liquid level monitor or timer {1}
1.32.~.~.~ Prover bell

DEFINITION

Classification: 73/1.32

Prover bell:

(under subclass 1.31) Subject matter which includes a bell-shaped object for introducing a known volume into (a) the apparatus for proving or calibrating or (b) the device being proven or calibrated.