Stephenson's Type I Sixbar Linkage: Ground is one of the two-pin links connecting both three-pin links
and the crank is a three-pin link.
Stephenson's Type II Sixbar Linkage: The five-bar chain on the left prevents an algebraic solution to this linkage.
This animation was created using a Newton-Raphson solution.
Stephenson's Type III Sixbar Linkage: Ground is one of the three-pin links and the crank is a two-pin link.
Watt's Type I Sixbar Linkage: Ground is one of the two-pin links and the crank is another two-pin link.
Watt's Type II Sixbar Linkage: Ground is one of the three-pin links and the crank is a two-pin link.