Double Differential Steering System on a MODELCAR - YouTube
Geneva with Torsion Spring Mechanism - SketchUp,Parasolid,SOLIDWORKS,OBJ,Autodesk 3ds Max,STEP / IGES,STL - 3D CAD model - GrabCAD
The Tusi-couple is a mathematical device in which a small circle rotates inside a larger circle twice the diameter of the smaller circle. Rotations of the circles cause a point on the circumference of the smaller circle to oscillate back and forth in linear motion along a diameter of the larger circle. The couple was first proposed by the 13th-century Persian astronomer and mathematician Nasir al-Din al-Tusi in his 1247 Tahrir al-Majisti.