Crank-Slider
Rotating crank converts to linear piston motion — the basis of every internal combustion engine.
Four-Bar Linkage
The coupler traces a beautiful figure-8 Chebyshev path. Fundamental building block of all machinery.
Scotch Yoke
Converts rotation to perfectly smooth simple harmonic motion. Used in steam engines and compressors.
Watt's Linkage
Generates an approximate straight-line motion — James Watt's proudest invention (1784), crucial for steam engines.