Automatic changeover thermostat with single bi-metal and common set lever having individual heat and cool setpoint indicators
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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Abstract
A single bimetal automatic changeover thermostat has heating, cooling and changeover switches mounted to the bimetal. A single control point adjustment lever for rotating the bimetal has separate shaped heat and cool set point indicators which are movable along a temperature scale.
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Citations
4 Claims
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1. An automatic changeover thermostat for controlling heating apparatus and cooling apparatus for heating and cooling a conditioned space, comprising:
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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. - View Dependent Claims (2)
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3. An automatic changeover thermostat for controlling heating apparatus and cooling apparatus for heating and cooling a conditioned space, comprising:
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a base member; a single temperature responsive element mounted for rotation relative to said base member; a heating switch for initiating operation of said heating apparatus when said temperature falls to a first level and for interrupting operation of said heating apparatus when said temperature rises to a second level; a cooling switch for initiating operation of said cooling apparatus when said temperature rises to a third level, said third level at least 2°
F. warmer than said second level;a changeover switch for selectively enabling said heating switch when said temperature falls to said first level and selectively enabling said cooling switch when said temperature rises to said second level; said heating switch, said cooling switch and said changeover switch mounted to said single temperature responsive element; operator adjustment means comprising a single lever coupled to said temperature responsive element for limited rotation of said temperature responsive element relative to said base 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 lever movable for positioning said set point indicators along said temperature scale. - View Dependent Claims (4)
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Specification