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Measured data pass-fail discriminating apparatus

  • US 4,763,286 A
  • Filed: 03/08/1985
  • Issued: 08/09/1988
  • Est. Priority Date: 08/04/1983
  • Status: Expired due to Fees
First Claim
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1. A measured data pass-fail discriminating apparatus for measuring a work being machined by a machine tool, comprising:

  • a measuring instrument for outputting measured data;

    a data discriminating device for discriminating said measured data as digital values to output an alarm signal, said data discriminating device including storing means for storing first limiting values for discriminating pass or fail of said work to be measured at both an upper limit and a lower limit, said upper and lower limits being located on opposite sides of acceptable values for said work, second limiting values on both sides of said acceptable values set closer to said acceptable values than said first upper and lower limit values and preview judging frequencies, respectively, and means for comparing said measured data with said limiting values, means for counting the number of measured data continuously lying within the region between said first limiting values and said second limiting values, means for resetting the number of measured data lying in the region between said first and second limiting values to zero when the measured data lies within an allowable region between said second limiting values, and alarm means for providing an alarm signal when at least one of said measured data exceeds one of said first limiting values, said measured data continues to lie within a region between said first limiting values and said second limiting values and a number of said measured data lying within a one of said regions has a predetermined relation with one of said preview judging frequencies belonging to said one of said regions.

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