Four bar chain or Quadric cycle chain consists of four links, each of them forms a turning pair. The inversions of four bar chain are as follows.
* Beam Engine (Crank and lever mechanism)
* Coupling rod of a locomotive (Double crank mechanism)
* Watt's indicator mechanism (Double lever mechanism)

The mechanism in which two are turning pairs and two are sliding pairs, is called
* double slider crank chain
* elliptical trammel
* Scotch yoke mechanism

Single slider crank chain is a modification of the four bar chain. Single slider crank chain consists of one sliding pair and three turning pairs. It is, usually, found in reciprocating steam engine mechanism. This type of mechanism converts rotary motion into reciprocating motion. The inversions of a single slider crank chain are found in the following mechanisms.
* Pendulum pump or Bull engine
* Oscillating cylinder engine
* Rotary internal combustion engine or Gnome engine.
* Crank and slotted lever quick return motion mechanism.
* Whitworth quick return motion mechanism.