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Automatic control circuit for regulating temperature

  • US 3,353,589 A
  • Filed: 10/22/1965
  • Issued: 11/21/1967
  • Est. Priority Date: 10/22/1965
  • Status: Expired due to Term
First Claim
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1. APPARATUS FOR MAINTAINING A ZONE AT A PRESELECTED TEMPERATURE COMPRISING:

  • MEANS FOR CHANGING THE TEMPERATURE IN SAID ZONE INCLUDING COOLING MEANS AND HEATING MEANS;

    MEANS FOR SENSING THE TEMPERATURE IN SAID ZONE;

    ELECTRICAL CIRCUIT MEANS FOR EFFECTING THE OPERATING OF SAID COOLING MEANS AND SAID HEATING MEANS;

    MEANS RESPONSIVE TO SAID SENSING MEANS FOR PROVIDING A VOLTAGE IN SAID CIRCUIT MEANS INFINITELY VARIABLE AS A FUNCTION OF A DEVIATION IN THE ZONE TEMPERTURE BELOW THE PRESELECTED TEMPERATURE;

    AND SEMICAONDUCTOR CONTROL MEANS RESPONSIVE TO SAID VARIABLE VOLTAGE IN SAID CIRCUIT FOR VARIABLY ENERGIZING SAID HEATING MEANS AS A DIRECT FUNCTION OF THE AMOUNT OF SAID TEMPERATURE VARIATION.

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