Single dwell with dyad
This is a Single Dwell mechanisms in which a dyad remains stopped whill point P of the coupler goes along a nearly round part of it's trajectory
-Move the point A and observe that point P (red point) describes a trajectory nearly that a circumference
-L2=L3=L4
-The point O is the center of the circumference
-While point P(red) translates along the piece of the curve that is almost an arc of circunference, point C remains stopped in the center of the circunference, and therefore, the crank of the dyad remains stopped
-Move point D to make a design with a different dyad