Connecting rod 2 has collar a encircling round eccentric 1 which rotates about fixed axis C. When eccentric 1 rotates about axis C, connecting rod 2 and pawl 3 move rack 4 intermittently to the right along fixed guides b-b. Pawl 3 can be turned over, about axis B, in which case the rack moves to the left.
$1814$LR,6L$