Bevel segment gear 1 turns about fixed axis A and meshes with bevel gear 2 which rotates about fixed axis B-B. Gear 2 is connected by a sliding pair to link 3. Link 3 has helical motion along and about axis B-B, being connected by a screw pair to base 4. When segment gear 1 oscillates about axis A, gear 2 rotates alternately in each direction and link 3 reciprocates with a helical motion with respect to base 4.
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