The inventions of Leonardo da Vinci for the canal lock was one of his most enduring achievements. The lock he invented – the miter lock, is still in use today at almost any canal or waterway you visit.
His original drawing given below –
This is one of his inventions that was immediately taken to its surroundings, and it slowly spreading around the world within a couple of centuries. The locks it replaced were inefficient, cumbersome and very heavy. Usually he passed not a single person working very hard, or two people share the load to lift one of the old castles against gravity. Leonardo's design was more efficient, easier to move and did its job exactly as intended.
As the name implies lock miter Leonardo was mitred, there are two angles of 45 ° facing each other at one point. When the oncoming water hit them it forced two meters of each other, which led to a more rigid seal between them.
Below is a video showing the difference between a lock miter Leonardo and the castle portullis whom he replaced, he also shows some modern examples of castle Leonardo.
Source: leonardodavincisinventions. com
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