Theory of Machine
Rectangular bar in a rectangular hole is the following type of pair

Partially constrained motion
Freely constrained motion
Completely constrained motion
Incompletely constrained motion

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Theory of Machine
The Klein's method of construction for reciprocating engine mechanism

Utilizes a quadrilateral similar to the diagram of mechanism for reciprocating engine
Enables determination of Cariole’s component
Is a simplified form of instantaneous center method
Is based on acceleration diagram

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