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Blood pressure and heart rate measuring watch

  • US 4,331,154 A
  • Filed: 10/15/1979
  • Issued: 05/25/1982
  • Est. Priority Date: 10/15/1979
  • Status: Expired due to Term
First Claim
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1. Apparatus for measuring blood pressure, comprising:

  • transducer means for generating an electrical signal having an amplitude corresponding to the magnitude of applied pressure;

    means for pressing at least a portion of said transducer means adjacent an area of a body where blood pressure pulses may be detected, the transducer means generating electrical pressure pulses corresponding to the detected blood pressure pulses, each of the electrical pressure pulses defining a maximum voltage over a systolic interval and a minimum voltage over a diastolic interval;

    analog to digital converter means for sampling the voltage amplitude at a plurality of points on each electrical pressure pulse and for generating a coded data word for each sampled voltage, the data word defining the pressure corresponding to the sampled voltage amplitude;

    systolic comparator means for comparing said coded data words and storing the data word defining the highest pressure;

    diastolic comparator means for comparing said coded data words and storing the data word defining the lowest pressure; and

    pressure display means for displaying a representation of the stored data word of the systolic comparator and of the diastolic comparator.

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