Windmill fantail
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A fantail is a small windmill mounted at right angles to the sails, at the rear of the windmill, and which turns the cap automatically to bring it into the wind. The fantail was patented in 1745 by Ed
Danish Smock mill from 1895 at Sønderho, Fanø, with fantail
Gear
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A gear or gearwheel, also called a toothed wheel, is a rotating machine part typically used to transmit rotational motion or torque by means of a series of "teeth" that engage with compatible teeth of
Windmill fantail
…windmills elsewhere except where English millwrighting traditions were in evidence. The rotating fantail turns the cap of the windmill via a system of gearing to a toothed rack around the top of the mill tower, or to wheels running on the ground in the case of a post mill. It does so until the fantail sails…
Bronze gear with pawl from Luoyang, China, dated to the Warring States period (475–221 BC)
Modern model of a south-pointing chariot
Wooden cogwheel driving a lantern pinion or cage gear
A cast gearwheel (above) meshing with a cogged mortise wheel (below). The wooden cogs are held in place by nails.