Gear 1 rotates about fixed axis A and meshes with gear 2 which rotates about fixed axis B. Gears 1 and 2 have equal pitch radii. Gear 1 is connected by a sliding pair to link 7 which slides along guide 8 of gear 1. Roll 6 of link 7 slides along slot a of fixed face cam 9. Link 3 is connected by turning pairs C and D to links 7 and 4. Roll 11 of link 3 slides along slot b of face cam 10 which is rigidly attached to (or integral with) gear 2. Link 4 is connected by turning pair E to lever 5 which turns about fixed axis F. When gear 1 rotates, lever 5 oscillates. The required kind of motion of lever 5 can be obtained by properly designing the shapes of slots a and b of cams 9 and 10.
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