Flexible link 2 runs over pulleys 1 and 5 which are of equal diameter. Flexible link 2 is connected by turning pair C to link 3 which, in turn, is connected by turning pair B to link 4. When point C travels along the straight portions of its path, the motions of links 3 and 4 are equivalent to those of the connecting rod and crank of the offset slider-crank linkage ABC. When point C travels along the circular portions of its path, the motions of links 3 and 4 are equivalent to those of the connecting rod and rocker arm of a four-bar linkage in which the length of the crank equals the radius of the pulleys.
$1867$FL,6L$