“…It is important to mention, that since P 1 ∈ sing(S A 1 ) ∩ sing(S B 1 ), E 1 is unable to move from one branch to another at P 1 , see [29] for an in-depth analysis of this singularity. Therefore, unlike in the Koenigs joint, in this Bricard mechanism the two branches of the configuration space, V , related to the two branches of C 1 intersecting at P 1 are not intersecting when E 1 = P 1 and, thus,…”