The Indiana Jones and the Great Circle cog wheel puzzle in Khmer is part of the Blessed Pearl quest, in which the player has to set up a series of cogs to set an old mechanism working again.

A single-speed bike, also known as a fixed bike, has one cog attached to the rear wheel, which is powered by a chain and chainring with pedals. You pedal the chainring, the chain spins the cog ...

The Baldwin Company built three odd little engines that are first used on the Cog Wheel line. The engines have two sets of cogs wheels running in the center rack rail of the track. The engine ...

When gearing systems were first designed with metal gear wheels, any slight imperfection in one cog would rub against the cogs it touched in the adjacent wheel and ultimately cause a catastrophic ...