Gear 1 rotates about fixed axis B and meshes with planet gear 2 which is rigidly attached to planet gear 4. Gear 4 meshes with gear 5 which rotates about axis B. Carrier 3 rotates about axis B and is connected by turning pair A to planet gears 2 and 4. Gear 5 meshes with gear 6 which rotates about fixed axis C. Gear 6 meshes with gear 7 which rotates about fixed axis D and is rigidly attached to driving drum a of belt conveyer b. Rigidly attached to gear 1 is cam 8 which engages bell-crank lever 9. Lever 9 turns about fixed axis E and is connected by turning pair F to connecting rod 10 which, in turn, is connected by turning pair A to carrier 3. When gear 1 rotates, driving drum a of conveyer b rotates at variable angular velocity. This variation depends upon the shape of cam 8 and the dimensions of the links of the mechanism.
$2806$CmG,FD$