Link 1, designed as a gear, rotates about fixed shaft 4 with its centre at point A. The gear is rotated by a drive which is not shown. Link 2 rotates about fixed axis B. Link 3 rotates about shaft 5 with its centre at point C. Rigidly fitted in links 1 and 2 are pins a and b which slide along radial slot d in link 3. Upon uniform rotat ion of link 1, links 2 and 3 rotate nonuniformly, making complete revolutions about centres B and C.
$940$LG,4L$