US PATENT SUBCLASS 33 / 643
.~.~.~ Millstone with respect to millstone shaft

Current as of: June, 1999
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33 /   HD   GEOMETRICAL INSTRUMENTS

501  DF  GAUGE {61}
613  DF  .~ Collocating {14}
626  DF  .~.~ Tool or surrogate {4}
643.~.~.~ Millstone with respect to millstone shaft

DEFINITION

Classification: 33/643

Millstone with respect to millstone shaft:

(under subclass 626) Subject matter wherein the instrument is a grinding stone of a grain mill having an axle and the gauge contacts the axle and either the grinding stone thereon or a cooperating, fixed grinding stone to determine whether the stone is at right angles to the axle.

SEE OR SEARCH THIS CLASS, SUBCLASS:

196, for devices for testing the trueness of a millstone face.