US PATENT SUBCLASS 33 / 558.09
.~.~.~.~ Having opposed threads

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

501  DF  GAUGE {61}
558.01  DF  .~ Pivoted probes (e.g., divider, caliper, etc.) {7}
558.04  DF  .~.~ Having adjustable legs {1}
558.05  DF  .~.~.~ By screw means {5}
558.09.~.~.~.~ Having opposed threads

DEFINITION

Classification: 33/558.09

Having opposed threads:

(under subclass 558.05) Subject matter including a threaded member having left and right helices so that rotation of said member causes relative movement in opposite direction between the legs.