The lengths of he links derive from the particular position of the link taken when the moving point K coincides with A. Triangle ABC is a right angled isosceles. H is on the bisector of angle B, so that CH = HF = FA. D is the middle of FA. E is the middle of AC. The links are IK = IM = AE. GN = GK = GF = AD. MJ = JF = BF = CB. The link transforms the rotational motion of point G to exact rectilinear motion of points K and N.
Inspired by Artobolovsky vol.1 p470.