Gears from Archimedes, Heron and Dionysius

Michael Lahanas

Οδοντωτοί Τροχοί , Αρχιμήδης ο Συρακούσιος, Ήρων και Διονύσιος ο Αλεξανδρεύς

Archimedes, Heron, Dionysius: Zahnräder und Getriebe

Aristotle mentions gears around 330 BC, (wheel drives in windlasses). He said that the direction of rotation is reversed when one gear wheel drives another gear wheel. Philon of Byzantium was one of the first who used gears in water raising devices. Archimedes used gears in various constructions. Actually we have only indirect knowledge of his inventions. He did not publish any work describing his inventions. He viewed his mechanical inventions as amusements or as practical concerns of no scientific importance. Plutarch says: ''Although these inventions made his superhuman wisdom famous, he nonetheless wrote nothing on these matters because he felt that the construction of all machines and all devices for practical use in general was a low and ignoble business. He himself strove only to remove himself, by his handsomeness and perfection, far from the kingdom of necessity."

Column drums of a Greek Temple, almost looking like Gears (