Technology and Engineering Atlas

How Things Are Built
Sign In
Text size
100%
Theme
Invention

Padlock

Mechanical Engineering

A padlock is a portable, detachable lock with a shackle that can be passed through a chain link, hasp or similar opening to prevent theft, vandalism or unauthorized use. Padlocks appear across several ancient civilizations independently: archaeological evidence places them in the Roman world as early as 500 BC, they were used in China from the late Eastern Han dynasty, roughly AD 25 to 220, in early designs made of bronze, brass or silver with both key-operated and combination mechanisms, and in Europe padlocks are documented from the middle La Tene period, later spreading through the Roman world and, by the Viking Age, appearing as spring-mechanism padlocks recovered from the Jorvik settlement in York, England, dated to around AD 850.

Facts
SignificanceSourced to the subject's own account
Padlocks dating to the Roman era, 500 BC to 300 AD, are known in the archaeological record, and were known in early times by merchants traveling the ancient trade routes to Asia, including China. 1
Sources
1. Padlock (Wikipedia)
WikipediaHistory section, trade routes paragraph, Wikipedia article Padlock
Quote, History section, trade routes paragraph, Wikipedia article Padlock
They were known in early times by merchants traveling the ancient trade routes to Asia, including China.
View the Source
Comments (0)
No comments yet. Be the first to share a thought.
Reader Challenges (0)
No disputes yet. Spotted an error or a better source? Open the first one.