Crank 1 rotates about fixed axis A and is connected by turning pair B to connecting rod 2 which, in turn, is connected by turning pair C to lever 3. Lever 3 turns about fixed axis D. Slider 5 moves in fixed guides p-p and has attached lever 4. Reciprocating motion is transmitted to slider 5 by the rolling motion, without slipping, of lever 3 along lever 4. The cam surface of lever 3 is along a circular arc of radius r; that of lever 4 is a circular arc of radius R = 2r.
$1711$LC,RL$