In an apparatus for the control of temperature, a continuously rotating contour disc causes a bimetallic element to execute a slow oscillating motion for alternately turning on and off a switch operatively connected to a heat generating device. The complemental lengths of one off- and one on-period which together constitute a cycle of constant duration, depend upon an arbitrary positioning of the bimetallic element (setting of the desired temperature value) and upon the temperature-responsive deformation (actual temperature value) of the bimetallic element.
