Mechanics & Machines
Ratchets & Pawls
Forward okay. Backward NOPE. The world's most useful mechanical word: NO.
Hear that? CLICK CLICK CLICK. Every click is a tiny mechanism doing something genuinely clever. Let's open it up.
Concepts you just met
Asymmetric TeethOne-Way RotationSpring-Loaded PawlWrenches & Freewheels