Define - 1. Mechanism 2.Inversion
1. Mechanism : When one of the links of a kinematic chain is fixed, the chain is known as mechanism.
2. Inversion of mechanism The method of obtaining different mechanisms by fixing different links in a kinematic chain, is known as inversion of the mechanism. So we can obtain as many mechanisms as the number of links in a kinematic chain by fixing, in turn, different links in a kinematic chain.