Truth is ever to be found in simplicity, and not in the multiplicity and confusion of things.
I. Newton
Four Link Mechanisms
In this chapter we shall confine our study to four-link mechanisms and discuss the kinematic characteristics of these mechanisms in more detail. Four-link mechanisms are the most commonly used mechanisms in machinery. They usually form a part or the whole of the machine structure. In the following figure the four-link kinematic chains and the mechanisms that are derived from these chains are shown.