Polygon compensation coupling system for chain and sprocket driven systems

Polygon compensation coupling system, the system comprising:

• a first rotatable element;
• a second rotatable element;
• at least one linkage coupling the first rotatable element with the second rotatable element, the linkage comprising:
• at least one first coupling element pivotably coupled to the first rotatable element at a position which is radially spaced apart from the axis of rotation of the first rotatable element;
• at least one second coupling element pivotably coupled to the second rotatable element at a position which is radially spaced apart from the axis of rotation of the second rotatable element;
• wherein the first and second coupling elements are pivotably coupled to each other at a hinge point, and
• wherein the hinge point is configured to move along a compensation curve varying the coupling between the first rotatable element and the second rotatable element so that a rotation of the first rotatable element with constant angular velocity results in a rotation of the second rotatable element with a non-constant, fluctuating angular velocity.