Converting continuous rotation into reciprocating translation with dwells in the middle of the course.
Four sprockets are identical. The orange one is driving. The violet chain link has an axle for a revolution joint with the red slider.
The course length depends on vertical axle distance between the orange sprocket and the top one.
The dwell time depends on horizontal axle distance of two middle sprockets.
This video shows the possibility to create reciprocating translation with dwell at any point of the course by using chain drive with four sprockets and arranging them at appropriate positions.