Peaucellier Straight-Line Linkage: This linkage is one of the few to draw an exactly straight line.
By changing the distance between ground pivots we can also draw circular arcs of very large radius.
Chebyshev Paradoxical Mechanism: If the flywheel is started in the clockwise direction, it will
spin four times for every revolution of the crank.
Chebyshev Paradoxical Mechanism: If the flywheel is started in the counterclockwise direction, it
will spin only twice for every revolution of the crank!