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Pacer device

  • US 4,309,599 A
  • Filed: 12/06/1979
  • Issued: 01/05/1982
  • Est. Priority Date: 12/06/1979
  • Status: Expired due to Term
First Claim
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1. An electronic device for measuring the time interval between the occurrence of any two successive ones of a plurality of similar events, specificially, the time interval between footsteps in jogging, running, or walking, or the leg or arm motion associated with bicycling, rowing, swimming, cross-country skiing or the like, and for providing bio-feedback information in the form of an alarm signal:

  • if the measured interval is less than a predetermined low limit;

    or if the measured interval is greater than a predetermined high limit;

    said device comprising;

    transducer means for detecting the occurrence of each one of said events and for providing an output signal at each such detection;

    a timing circuit for measuring the time interval between the occurrence of two successive such events, the output signal of said transducer being fed to said timing circuit;

    a detection circuit for detecting whether the measured interval is less than said low limit or greater than said high limit;

    an output circuit to provide an output signal when interval is less than said low limit or greater than said high limit;

    said timing circuit comprising a two state device having a first period and a second period;

    said first period being equal to said low limit;

    the sum of said first period and said second period being equal to said high limit;

    said two state device comprising a multivibrator, said first period being determined by a first timing circuit associated with a first half of the multivibrator, and said second period being determined by a second timing circuit associated with a second half of said multivibrator;

    said first and second timing circuits comprising RC circuits, the R'"'"'s of both circuits being adjustable;

    whereby said first and second periods are adjustable; and

    said detection circuit comprising a first D type flip-flop and a second D type flip-flop;

    each said flip-flop having a D terminal, a clock terminal and a reset terminal;

    an output of said first half of said multivibrator being fed to the D terminal of said first flip-flop;

    the inverse of said output of said first half of said multivibrator being fed to the D terminal of said second flip-flop;

    an output of said second half of said multivibrator being fed to the reset terminals of both flip-flops; and

    an output of said transducer means being fed to the clock terminals of both flip-flops and to an input terminal of the first half of said multivibrator.

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