Mechanics & Machines
Linkages & Four-Bars
Rigid sticks pivoting on pins. Wipers, swings, bicycles, robot arms — all four-bar magic.
A windshield wiper SWEEPS — but the motor inside ROTATES in circles. How does a circle become a sweep? Look at the sticks hiding underneath.
Concepts you just met
Four-Bar LinkageCrank-RockerWatt Straight-LineCoupler Motion