Air flow damping system

摘要: A control device for a triple-plenum air conditioning apparatus having by-pass duct, hot duct and cold duct. first shaft mounted through the ducts carries damper blade at right angles to each other. second The includes geneva link on shaft, third carrying drive plate with pins independently actuating links cam holding one of against rotation while other is being actuated. Rotation hundred degrees results in shafts ninety degrees.