Flexible link 2 runs over pulleys 1, 5 and 6 of equal diameter and is connected by turning pair A to connecting rod 3. Link 3 is connected by turning pair B to slider 4 which moves along fixed guide a whose axis is parallel to line CD. When point A travels along the horizontal straight portion (parallel to line CD) of its path, link 3 has translational motion. When point A travels along the inclined straight portions, the motions of links 3 and 4 are equivalent to those of the connecting rod and slider in an ellipsograph mechanism. When point A travels along the circular portions of its path, the motions of links 3 and 4 are equivalent to those of the connecting rod and slider in an offset slider-crank mechanism in which the length of the crank equals the radius of the pulleys.
$1894$FL,ML$