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I.
Watch this brief
animation of a water mill
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The turning wooden shaft turned the round stone
grinding stone (c) attached at its top. The grinding stone wheel
rubbed against a stone wheel that was fixed to the mill floor
(D).
The grain was fed down through a grain feed into a hole in the
middle of the grinding stone (E). The grain was ground into
flour which moved out through grooves in the face of the
grinding stones. |
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The flowing river water turned
the paddle water wheel next to the water mill. Running through
the water wheel was a wooden pole that was attached to a
vertical wooden cog wheel, shown as H in Fig. 2 below.
This wheel changed the direction of force when, when its cogs
turned the smaller horizontal cog wheel. (Shown at G below) This
turned the machine into what is called 'gears', because it also
made the attached wooden shaft (I) turn faster than the water
wheel.
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This animation shows two modern metal gears, both turning on the
vertical plane. |
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