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Heartbeat rate indicator

  • US 4,513,753 A
  • Filed: 11/04/1982
  • Issued: 04/30/1985
  • Est. Priority Date: 11/17/1981
  • Status: Expired due to Term
First Claim
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1. A heartbeat rate indicator comprising:

  • a depressible detection electrode;

    an amplifier connected to receive and amplify a signal from said detection electrode;

    a filter connected to said amplifier for passing part of the amplified signal output from said amplifier;

    an operation processing circuit connected to receive the filtered output signal from said filter for determining a heartbeat number;

    display means for indicating the heartbeat number; and

    switch means having a normally closed state for electrically connecting said detection electrode and one voltage potential of a power source to effect grounding of the detection electrode and being switchable to an open state upon depression of said detection electrode to effect measurement of the heartbeat.

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