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

• Current Assignee: Keller Jr John Walter
• Original Assignee: Keller Jr John Walter
• Inventors: KELLER JR JOHN WALTER
• Application Number:
  US04/283,271
• Time in Patent Office: 1,100 Days
• US Class Current: 607/29
• CPC Class Codes: A61N 1/368 comprising more than one electrode co-operating with different heart regions A61N1/3622, A61N1/3627 take precedence

Claims

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.