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RECYCLE PREVENTION CONTROL CIRCUIT

  • US 3,716,756 A
  • Filed: 03/03/1972
  • Issued: 02/13/1973
  • Est. Priority Date: 03/03/1972
  • Status: Expired due to Term
First Claim
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1. A control circuit for preventing restarting of electrical apparatus for a preset time after a power interruption comprising:

  • a. first normally open electrical contacts effective when closed to connect said electrical apparatus to a power supply;

    b. second normally open contacts effective when closed to connect said electrical apparatus to said power supply, said second normally open contacts being connected in parallel to said first normally open contacts;

    c. first electrical means for closing said first normally open contacts;

    d. preset time delay circuit means connected to said power supply and effective upon timing out to energize said first electrical means whereby to close said first normally open contacts after said preset time delay;

    e. second electrical means connected to said power supply for closing said second normally open contacts only after said first normally open contacts have been closed; and

    f. means for opening said first normally open contacts to reset said time delay circuit as said second normally open contacts are closed.

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