The ratchet mechanism is a fascinating energy-conversion system that converts disorderly or random motion into orderly, directed movement through a process known as spontaneous rectification. It is a ...

Gearing up: a ratchet comprising a gear wheel and a spring-loaded pawl. (Courtesy: iStock/PeteMuller) A thought experiment proposed more than 50 years ago by Richard Feynman has finally been realized ...

== Device ==* Ratchet (device), a mechanical device that allows movement in only one direction* Ratchet, metonomic name for a socket wrench incorporating a ratcheting device* Ratchet (instrument), a ...

Brownian motors and ratchet systems constitute a field of study that leverages stochastic fluctuations to generate directed motion in systems otherwise dominated by thermal noise. These devices ...