Circular gear 1 rotates about fixed axis A, located eccentrically with respect to the geometrical axis 0 of gear 1, and meshes with noncircular gear 2 which rotates about fixed axis B. Gear 2 is of symmetric oval shape. The perimeter of the pitch curve of gear 2 is twice that of the pitch circle of gear 1. Gear 2 is connected by turning pair D to slider 4 which moves along slot a-a of link 3. Link 3 reciprocates in fixed guides b-b. The average transmission ratio in a full cycle of the mechanism is i₁₂=ω₁/ω₂=2 where ω₁ and ω₂ are the angular velocities of gears 1 and 2. When driving gear 1 rotates at uniform velocity, gear 2 rotates at nonuniform velocity, imparting a reciprocating motion to link 3 that can be varied by changing tne eccentricity of gear 1.
$2429$LrG,5L$