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Automatic changeover thermostat with single bi-metal and common set lever having individual heat and cool setpoint indicators

  • US 5,154,226 A
  • Filed: 12/21/1989
  • Issued: 10/13/1992
  • Est. Priority Date: 12/21/1989
  • Status: Expired due to Term
First Claim
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1. An automatic changeover thermostat for controlling heating apparatus and cooling apparatus for heating and cooling a conditioned space, comprising:

  • a base member;

    a support member extending from said base member and mounted for rotation relative to said base member;

    a temperature responsive element secured to said support member;

    heating switch means for initiating operation of said heating apparatus;

    cooling switch means for initiating operation of said cooling apparatus;

    changeover switch means for selectively enabling either said heating switch means or said cooling switch means;

    said heating switch means, said cooling switch means and said changeover switch means mounted to said temperature responsive element and activated by movement of said temperature responsive element;

    a single control point adjustment lever secured to said support member for rotation of said support member, said lever having a heat set point indicator and a cool set point indicator spaced apart; and

    a temperature scale located adjacent said heat set point indicator and said cool set point indicator;

    said control point adjustment lever movable for positioning said set point indicators along said temperature scale.

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