Gear 1 rotates about fixed axis A and meshes with gear 3 of equal pitch diameter which rotates about fixed axis B. Gear 1 has roller c which rotates about axis E and slides along slot d-d of slotted lever 4. Lever 4 is connected by turning pairs F and K to gear 3 and link 5. Link 5 is connected by turning pair D to lever 2 which turns about fixed axis C. The axis of slot d of lever 4 is made up of a straight line and an arc of radius R. When driving gear 1 rotates, point K describes complex connecting-rod curve a of which portion q-q approximates a circular arc described from point D with the radius D͞K. When point K passes through this portion of curve a, driven link 2 almost ceases to oscillate, i.e. it practically has a dwell.
$2512$LrG,D$