Yang Liu has developed Bezier linkages that trace trigonometric Bezier curves. In this video he shows that he can design these linkages to draw his name in cursive.
This is a demonstration of the colloquial description of Kempe’s Universality Theorem, which says “there is a linkage that signs your name,” described by William Thurston. See the article by Joseph Malkevitch.
Our Chinese colleagues can see this video on YouKu at the link:
Linkage signs your name