Four Bar Chain Mechanism | Grashof's Law | Inversion Of Four Bar Chain 

Four bar chain mechanism consist of four links which are connected in the form of a quadrilateral by four pin joints. A Four bar linkage, also called a four bar, is the simplest movable closed chain linkage. A variety of useful mechanisms can be formed from four bar chain mechanism through slight variations.
Inversion of four bar chain-
1) Crank rocker mechanism (Beam engine).
2) Double crank mechanism (Coupling rod of locomotive).
3) Double rocker mechanism (Watt’s indicator mechanism).
#theoryofmachines #fourbarchainmechanism