Round eccentric 1 rotates about fixed axis A. Connecting rod 6 has collar a encircling eccentric 1. Slider 5 moves along fixed guide p and is connected by turning pair B to connecting rod 6 and by turning pairs D and C to pawls 2 and 3 which turn ratchet wheel 4 intermittently counterclockwise about fixed axis E. Pawl 2 engages wheel 4 when slider 5 moves downward and pawl 3 when it moves upward. When eccentric 1 rotates at uniform velocity, wheel 4 rotates nonuniformly.
$1809$LR,6L$