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Cardiac pacer

  • US 3,253,596 A
  • Filed: 05/27/1963
  • Issued: 05/31/1966
  • Est. Priority Date: 05/27/1963
  • Status: Expired due to Term
First Claim
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1. AN ELECTRICAL CARDIAC PACER CIRCUIT COMPRISING:

  • INPUT MEANS RESPONSIVE TO A CARDIAC SIGNAL TO PRODUCE A TRIGGER SIGNAL, OUTPUT MEANS FOR PRODUCING A CARDIAC STIMULATION SIGNAL, AND A CHANNEL INTERCONNECTING THE INPUT MEANS AND OUTPUT MEANS, SAID CHANNEL INCLUDING AN OSCILLATOR HAVING MEANS RESPONSIVE TO SAID TRIGGER SIGNAL TO CAUSE SAID OUTPUT MEANS TO PRODUCE A STIMULATION SIGNAL SYNCHRONOUSLY WITH THE TRIGGER SIGNAL, AND SAID OSCILLATOR BEING CAPABLE OF SELF OSCILLATION IN THE ABSENCE OF A TRIGGER SIGNAL TO CAUSE SAID OUTPUT MEANS TO PRODUCE A STIMULATION SIGNAL SYNCHRONOUS WITH SAID SELF OSCILLATION, SAID OSCILLATOR BEING PERMENENTLY CONNECTED TO SAID OUTPUT MEANS SO AS TO AUTOMATICALLY CAUSE PRODUCTION OF A STIMULATION SIGNAL IN THE PRESENCE OR ABSENCE OF A CARDIAC SIGNAL.

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