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Lock the development
Nov 16, 2016

Lock and private ownership almost at the same time was born. The Yangshao culture in China as early as 3000 BC, it retained a wooden locks mounted in wood-frame construction. During the Eastern Han dynasty Chinese iron three Spring lock technology has a very high level. Before and after the three Spring lock has lasted for more than 1000 years.

Early 18th century by the Englishman d. Potter invented cam locks. The key number by more than 20 kinds of development of three Spring lock to more than 80 species. Middle of the 19th century, European manufacturers in the cam lock and converted on the basis of three Spring lock slide rotor locks, the key number up to 1600.

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