title: Hoecken linkage
text: # Hoecken linkage
  
  In kinematics, the Hoecken linkage (named for Karl Hoecken) is a four-bar linkage that converts rotational motion to approximate straight-line motion. The Hoecken linkage is a cognate linkage of the Chebyshev linkage and Chebyshev's Lambda Mechanism.
  
  The linkage was first published in 1926.
  
  A generalization of the Hoecken linkage is Wittgenstein's rod.
  
  