Driving gear 1 rotates about fixed axis A and transmits rotation through intermediate gears 10 and 11, rotating about fixed axes B and C, to chain sprocket 12, which is rigidly attached to gear 11. Chain 8 runs over sprockets 12 and 6, over four pulleys 14, rotating about fixed axes, and over pulleys 4 and 5 carried by swinging arm 3. Thus chain 8 rotates sprocket 6 about fixed axis E. Arm 3 is oscillated about fixed axis D by connecting rod 2 which is connected by turning pair F to gear 1. Flexible link 13 runs over rollers 9, one of which is rigidly attached to sprocket 6. When gear 1 rotates continuously at uniform speed, arm 3 oscillates and rollers 4 and 5 change the motion of flexible link 8 so that it is periodically accelerated and retarded. This motion is transmitted to rollers 9 which correspondingly vary the feed motion of workpiece 7. The required feeding motion can be obtained by adjusting pin a of connecting rod 2 along slot b of arm 3.
$3543$CFL,ML$