Gear 1 rotates about fixed axis A and meshes with two gears, 2 and 3, of equal diameter, which rotate about fixed axes B and C. Cam 5, having the given profile, is mounted on disk b which is rigidly attached to gear 3. Bell-crank lever 4 turns about fixed axis D and its contact point e slides along cam surface d of cam 5. At this, stylus f of lever 4 describes the required curve k on the face of disk a which is rigidly attached to gear 2.
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