Which 18th-century invention by Robert Barron utilized levers that needed to be lifted to a precise height to open?
Answer
The double-acting lever tumbler lock
Robert Barron patented the first double-acting lever tumbler lock in 1778, which required levers to be lifted exactly to the correct height to allow the bolt to move.
Related Questions
Where was the earliest tangible evidence of locking devices unearthed?What material was the foundational locking device from Nineveh primarily constructed from?What operational principle defined the initial locking system, such as the Egyptian or Nineveh lock?What significant complexity did the Romans add to the pin-tumbler concept to create the warded lock?Why did the Romans favor bronze over iron for their keys?How did affluent Romans use their lock keys to signal wealth?What was the primary focus of lock making during the Medieval Age?What nickname was given to highly ornamented Gothic locks due to a feature related to their aesthetics?Which 18th-century invention by Robert Barron utilized levers that needed to be lifted to a precise height to open?What did Joseph Bramah partner with Henry Maudslay to develop?What crucial security feature was incorporated into Jeremiah Chubb's lock patented in 1818?Whose patent refined the ancient pin tumbler idea into the global standard using key pins and driver pins?