Heating control system

A heating control system for automatically controlling the temperature within a space comprising in combination;

• temperature sensing means for detecting changes in temperature without the space and in response thereto, producing a control signal having a substantially linearly variable potential, the increase or decrease in potential being linearly varied in response to changes in temperature without the space;
• heat supply means for supplying heat to the space at a set rate including control valve means adapted to be selectively opened to increase the set rate at which heat is supplied to the space and selectively closed to decrease the set rate at which heat is supplied to the space;
• rheostat means including a movable contact means coupled to said control valve means and disposably controlled thereby to produce a reference feedback signal having a linearly variable potential, said potential being linearly varied in response to the selective opening and closing of said control valve;
• comparator means for comparing the potential of said variable control signal to the potential of said variable reference feedback signal, said comparator means in response to the potential of said variable control signal being greater than the potential of said variable reference signal being adapted to apply a closing signal to said control valve means to effect decreasing of the rate at which same supplies heat to the space, said comparator means being further adapted in response to the potential of said control signal being less than said reference potential to apply an opening signal to said control valve means to effect an increase in the set rate at which heat is supplied to the space.