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HEARTBEAT MONITOR WITH AUDIO AND VISUAL OUTPUTS

  • US 3,613,670 A
  • Filed: 02/12/1969
  • Issued: 10/19/1971
  • Est. Priority Date: 02/12/1969
  • Status: Expired due to Term
First Claim
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1. For a cardiac monitOr, audible-visible alarm means comprising:

  • first and second transistors, the emitters of which are adapted to receive a supply voltage transformer mechanism including primary coil means and secondary coil means, the ends of primary coil means being respectively connected to the collectors of said transistors;

    a speaker connectable to the secondary coil means of said transformer mechanism;

    a circuit including a diode in series with parallel-connected capacitor and neon light, the circuit being connected between the collectors of said transistors;

    a first resistor connected to the base of the first transistor and to the collector of said second transistor; and

    second resistor connected to the base of the second transistor and to the collector of said first transistor.

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