Circular gear 1 rotates about fixed axis A and meshes with noncircular gear 2. Portion a-a of the pitch curve of gear 2 is a circular arc of radius r. Link 3 turns about fixed axis C and is connected by turning pair B to gear 2. When driving gear 1 rotates, link 3 oscillates and has a dwell during the period when arc a-a is in engagement with gear 1. Gears 1 and 2 are held in engagement by the weight of gear 2.
$2511$LrG,D$