a bearing member 58 upon which the clutch housing 36 is supported for rotation with respect to the drive shaft 54 the clutch housing 36 has attached thereto for rotation therewith a plurality of fan blades 60 the thermally responsive actuator device 10 of this invention is positioned adjacent a radiator or heat exchanger 64 through which air flows to cool liquid therewithin as illustrated by arrows 66 in fig3 the radiator or heat exchanger 64 is part of the cooling system of the automotive engine with which the apparatus shown and discussed herein is associated during initial operation of an automotive engine not shown with which the apparatus shown and discussed herein is associated and during 34 cooler 34 temperature conditions the clutch mechanism is in the condition illustrated in fig3 ordinarily in clutch apparatus of the type illustrated there is slight 34 clutch drag 34 which causes the clutch housing 36 to have slight rotation with rotation of the drive shaft 54 even when the clutch mechanism is not actuated thus there is always at least a small volume or mass of air drawn through the radiator 64 when the drive shaft 54 is rotating rotation of the clutch housing 36 causes rotation of the thermally responsive actuator device 10 and the bracket 30 the wings 30a of the bracket 30 are of such a physical size and shape that the wings 30a cause movement of air adjacent the coiled tube 20 during rotation of.