The four-bar mechanism is the quintessential example of a so-called kinematic chain. In this planar mechanism, four links are constrained by four cylindrical joints. When one link is fixed or grounded, the motion of a second link determines the motion of the third and fourth links. Circular motion of the crank can produce either rocking or circular motion of the opposite link.

This model is obviously not made at the workshop of Polytechnic School at Karlsruhe and seems to be the Reuleaux-Voigt model C01.

Francis Moon 2005-00-00