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PORTABLE DEFIBRILLATORS INCLUDING ROTARY SOLENOID RELAYS FOR ENERGY TRANSFER AND DUMPING

  • US 3,814,105 A
  • Filed: 03/01/1972
  • Issued: 06/04/1974
  • Est. Priority Date: 03/01/1972
  • Status: Expired due to Term
First Claim
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1. A portable defibrillator for operation from a source of power, said defibrillator comprising:

  • 1. a source of defibrillation energy;

    2. an electrical network means for storing said defibrillation energy;

    3. a pair of electrodes engagable with a patient; and

    , 4. circuit means for controlling the selective application of said defibrillation energy to said patient via said electrodes, said circuit means including;

    a. a first switch;

    b. a first relay including a first set of contacts normally connecting said defibrillation energy source to said electrical network means, and a second set of contacts for connecting said electrical network means to said electrodes to selectively apply said stored defibrillation energy to said electrodes, said first relay further including a first rotary solenoid having a shaft rotatable upon energization thereof and means responsive to the rotation of said shaft for sequentially opening said first set of contacts and closing said second set of contacts; and

    , c. means interconnecting the source of power, said first switch and said first rotary solenoid to energize said first rotary solenoid upon actuation of said first switch; and

    , 5. means for automatically shunting said electrical network means whenever power is removed from said portable defibrillator, said shunting means including;

    a. a second relay including a set of contacts, a second rotary solenoid having a shaft rotatable upon energization thereof and means responsive to the rotation of said shaft for opening said set of contacts;

    b. a resistance means;

    c. means connecting said set of contacts and said resistance means in series across said electrical network means;

    d. means for connecting said second rotary solenoid to the source of power; and

    , e. a set of contacts forming part of said first switch and connected to said second rotary solenoid for removing power from said second rotary solenoid when said first switch is actuated.

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