Gear 1 rotates about fixed axis C and meshes with gear 3 which rotates about fixed axis A. Link 4 is connected by turning pairs D and B to gear 1 and to slider 2 which moves along slot a-a of slotted lever 5. Lever 5 is rigidly attached to gear 3. When gear 1 rotates, point B of slider 2 describes a complex connecting-rod curve.
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