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Energy conserving thermostatic control

  • US 3,964,677 A
  • Filed: 04/17/1975
  • Issued: 06/22/1976
  • Est. Priority Date: 04/17/1975
  • Status: Expired due to Term
First Claim
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1. A thermostatic control for use with a heating/cooling system which includes a source of low voltage operating potential and a system control relay connected electrically in series therewith, a thermostatic control comprising source means connected electrically in series with said low voltage source for providing a continuous source of operating energy for said control irrespective of the operating state of said relay, and for generating a continuous clock pulse train of predetermined frequency, timing means coupled to said source means for cyclically generating a temperature set point shifting signal at predetermined time intervals, said timing means including means for selecting the time duration of said shifting signal and means for selecting the magnitude thereof, temperature regulating circuit means including temperature set point means for generating a set point control signal and temperature sensing means for generating a variable control signal proportional to the temperature in said area for generating a modulating signal to control the system, and thereby the temperature, in said area, said regulating circuit being connected to said timing means to receive said temperature shifting signal and being responsive thereto to alter one of said control signals and thereby the regulated temperature in said area.

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