SLIDER-CRANK MECHANISM WITH A CRANKPIN

Connecting rod 2 is connected by turning pair C to slider 3. At its other end connecting rod 2 has circular arc a-a which slides along circular recess b-b of slider 3. The centre of both arcs is at point C. When crank-pin 1 rotates about fixed axis A, slider 3 is reciprocated in fixed guides by connecting rod 2.
$1487$SC,4L$