Slider 1 moves along fixed guides b-b. Slider 3 moves along fixed guide c. Slider 1 is connected by turning pair C to bent link 2 which ends in spherical head e sliding along slot f of slider 3. Mounted on lever 2 at point D is roller 7 which slides and rolls along fixed U-shaped groove a-a. The mechanism transforms reciprocating motion of slider 1 into reciprocating motion of slider 3 with a dwell for every other cycle of motion of driving link 1. By the action of catches 10 and 11, which turn about fixed axes A and B, and slide axially, lever 2 is automatically disengaged from and re-engaged to slider 3. When roller 7 moves along the lower branch of groove a-a, slider 3 remains stationary during a full cycle of motion of the driving link. The device consisting of links 8 and 9 serves to stop slider 3 in exactly the same position each time. Springs 4, 5 and 6 serve to hold catches 10 and 11 in the position shown.
$1380$LG,SF$