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The first known example of a tumbler lock was found in the ruins of the Palace of Khorsabad built by king Sargon II (721–705 BC.) in Iraq. [1] Basic principles of the pin tumbler lock may date as far back as 2000 BC in Egypt; the lock consisted of a wooden post affixed to the door and a horizontal bolt that slid into the post.
The Chubb detector lock is a variation of the lever lock which was designed to detect and prevent picking attempts. Lever locks can be drilled, but usually a template or stencil is required to mark the drilling point, as the lock mechanism is commonly mortised into the door and so it is harder to determine the point at which to drill.
The cylinder desk was a predecessor of the rolltop, and had been in use in Europe in the 1700s, but warping of the top was common as it was made from a single piece of wood. The tambour desk may also be considered an early rolltop even though the work surface was only partly covered by the top. The rolltop became a standard item of the ...
The rolltop desk was the mainstay of the small or medium-sized office at the end of the 19th century and the beginning of the 20th. Because it was produced in vast numbers and at varying levels of quality, the rolltop desk is popular in the antique market. It is usually expensive especially if the wood used is expensive.
Aronson, Joseph. The Encyclopedia of Furniture. 3rd edition.New York: Crown Publishers Inc., 1965. Bedel, Jean. Le grand guide des styles.Paris: Hachette, 1996. Boyce ...
The bitting of a key is the physical arrangement of the bit of the key that engage with the locking mechanism. The bitting instructs a locksmith how to cut a certain key, to replace a lost key or make an additional copy. Blade The segment of a key which enters the keyway of a lock and has key cuts machined into it. On a bit key the blade is ...