Linkage
Simple Mechanism
All the mechanisms having 4-links are simple mechanisms and the mechanisms having more than 4 links are compound mechanism.
There are three different simple mechanisms.
- Four bar mechanism: It consists of four links and four turning pair.
- Slider crank mechanism: It consists of four links, three turning pairs and one sliding pair.
- Double slider crank mechanism: It consists of four links, two turning pairs and two sliding pairs.
Four-Bar Mechanism
Inversions of Slider-Crank Mechanism
- First Inversion-link 1 is fixed :Reciprocating engine/compressor.
- Second Inversion-link 2 is fixed (Crank): Whitworth quick return mechanism, rotary (radial) engine.
- Third Inversion-link 3 is fixed (Connecting rod): Crank and slotted lever mechanism, oscillating cylinder mechanism.
- Fourth Inversion-link 4 is fixed (Slider): Hand pump, bull engine
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