US PATENT SUBCLASS 33 / 813
.~.~ Micrometer

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

700  DF  DISTANCE MEASURING {13}
783  DF  .~ Opposed contacts {10}
813.~.~ Micrometer {10}
814  DF  .~.~.~> Differential screw
815  DF  .~.~.~> With means for maintaining a constant or limited pressure on the contacts
816  DF  .~.~.~> With wear compensation or backlash prevention means
817  DF  .~.~.~> With lock
818  DF  .~.~.~> With additional indicator {2}
821  DF  .~.~.~> With preliminary setting arrangement {4}
827  DF  .~.~.~> Inside measurement only
828  DF  .~.~.~> With attachment {1}
830  DF  .~.~.~> With special scale markings
831  DF  .~.~.~> Details (e.g., spindle or anvil adjustment, material

DEFINITION

Classification: 33/813

Micrometer:

(under subclass 783) Subject matter including threaded elements for advancing at least one of the contacts and having means for indicating the distance between the contacts which includes a thimble, spindle or barrel having indicia for indicating the distance between the contact.

(1) Note. The indicating means provides for registering full and fractional turn of the threaded element.

(2) Note. Subcombination of micrometer which are not provided elsewhere in this class are properly included here.

(3) Note. Generally the movable contact moves only a fraction of the total distance measured, see subclass 821 for preliminary setting.

SEE OR SEARCH THIS CLASS, SUBCLASS:

821, for preliminary setting of a micrometer.