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Handheld digital gemstone measurement apparatus

  • US 4,845,646 A
  • Filed: 03/01/1988
  • Issued: 07/04/1989
  • Est. Priority Date: 03/01/1988
  • Status: Expired due to Fees
First Claim
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1. A handheld digital gemstone measurement apparatus comprising:

  • a housing and a first caliper jaw fixed to the housing;

    a second caliper jaw linearly movable relative to the first caliper jaw;

    means for sensing movement of said second caliper jaw and providing a signal representative of the linear travel of said second caliper jaw to provide a dimensional measurement of a gemstone positioned between said caliper jaws; and

    means responsive to one or more dimensional measurements of the gemstone for calculating the weight thereof, includingmeans for selecting a gemstone shape from a group of preprogrammed shapes, said selected gemstone shape having an associated formula for calculation of gemstone weight,means for substituting the one or more dimensional measurements into the formula associated with the selected gemstone shape and calculating the gemstone weight from the formula, andmeans for displaying the gemstone weight.

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