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Linus Yale Jr., portrait Example of a bank vault and a vault door, Linus will get orders from the United States Treasury Department in 1857 Custom house of Pittsburg 1857, a customer of Linus Yale Linus Yale Jr. (April 4, 1821 – December 25, 1868) was an American businessman, inventor, mechanical engineer, and metalsmith.
A sliding glass door, sometimes called an Arcadia door or patio door, is a door made of glass that slides open and sometimes has a screen (a removable metal mesh that covers the door). Australian doors are a pair of plywood swinging doors often found in Australian public houses.
Yett hanging in the main entrance of Blackness Castle, Scotland, showing attached bolts and pierced construction.Wrought in 1693. [1]A yett (from the Old English and Scots language word for "gate") [2] is a gate or grille of latticed wrought iron bars used for defensive purposes in castles and tower houses. [3]
Wrought iron is an iron alloy with a very low carbon content (less than 0.05%) in contrast to that of cast iron (2.1% to 4.5%). It is a semi-fused mass of iron with fibrous slag inclusions (up to 2% by weight), which give it a wood-like "grain" that is visible when it is etched, rusted, or bent to failure.
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A high security dual-barrel padlock. A quantitative measure of a padlock's tensile strength and resistance to forced and surreptitious entry can be determined with tests developed by organizations such as ASTM , Sold Secure (United Kingdom), CEN (Europe), and TNO (The Netherlands).