Crank 3 rotates about fixed axis D. Link 4 is connected by turning pairs B and C to links 3 and 1. Link 1 is designed as a cam whose profile a is along a circular arc of radius r. Cam 1 rolls without slipping along the surface of fixed cam 2 whose profile is along a circular arc of radius R. If radius R=2r, then point A, lying on arc a, moves along straight line q-q, transmitting reciprocating motion to piston 5. Spring 6 holds cam 1 in contact with cam 2.
$1723$LC,RL$