The gear is an invention that is a fundamental building block for modern inventions. One inventor in Greece was Archimedes who tinkered with gears a lot. One of his inventions we found in a ship wreak was designed to show the celestial movements which they depended on to keep track of time since they had no clocks. The gear is a circle with teeth on it.
The water wheel is an invention that wasn’t in use until Rome collapsed because they had slaves to do that work. The small communities had no slaves so they had to use labor saving inventions so that they could better use their time. The primitive water wheel had bowl like ends on them.
Both china and Greece had the crank but neither of them figured out how to use it backwards.It was a roman,we dont know which roman but a roman decided to use a water wheel or some circular moving thing to operate a saw or to move a toys arms up and down.
Cams are little teeth That often go onto water wheels to hit things. The christian monks used the cams to hit a hammer that smashed the ingredients for their beer every round trip. This is called the trip hammer
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