Carrier 1 rotates about fixed axis A and is connected by turning pairs B and C to gear 3 and to planet gears 5 and 6. Planet gear 5 meshes with fixed sun gear 2 which is rigidly attached to the base. Planet gear 6 is rigidly attached to gear 5 and meshes with gear 3. Slider 4 is connected by turning pair D to gear 3 and moves in fixed guide a whose axis q-q passes through point A. The dimensions of the links comply with the conditions: r₅= =r₆ and r₂=2r₃, where r₂, r₃, r₅ and r₆ are the pitch radii of gears 2, 3, 5 and 6. When carrier 1 rotates, gear 5 rolls around fixed gear 2 and gear 6 drives gear 3. Any point D of gear 3, lying on its pitch circle, describes straight line q-q passing through centre A of gear 2.
$2527$LrG,GI$