How is kinematic inversion obtained?

How is kinematic inversion obtained?

Options:

a. by changing relative motions between pairs of kinematic chain
b. by fixing different links at a time in kinematic chain
c. by changing lower pair to a higher pair
d. none of the above

Correct Answer: b. by fixing different links at a time in kinematic chain

Explanation:

Kinematic inversion can be defined as, it is a process in which different links of a kinematic chain are fixed, one at a time to produce different noticeable mechanisms.

Take an example of four bar chain mechanism as shown in figure. Four inversions are obtained from fixing four different links at a time. Figure (a) is a first inversion of four bar chain mechanism by fixing link 1. Figure (b) is a second inversion of four bar chain mechanism by fixing link 2. Figure (c) is a third inversion of four bar chain mechanism by fixing link 3. Figure (d) is a fourth inversion of four bar chain mechanism by fixing link 4.