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| :<span class="dablink">''For other uses, see ].''</span> | |||
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| ] padlock found at ].]] | |||
| A '''padlock''' is a simple type of detachable ], with a ]d or sliding ] designed to pass through a ring or staple on a door, chest, etc. While some modern padlocks do not require a key to be closed, others do require it, most often as a security measure against leaving the key inside the location being locked. | |||
| In Victorian times, English ] made giant padlocks which they challenged all-comers to open (or "pick") in order to claim a prize. This was supposed to demonstrate how secure their devices were to the public. The type of padlock made from layers of laminated steel was invented by ] in ]. | |||
| == Combination locks == | |||
| {{main|Combination lock}} | |||
| Combination padlocks do not use keys. Instead, the lock opens when its wheels are lined up correctly to display the correct combination. Often the lock is re-programmable by holding the shackle in a special position while turning the wheels, allowing the number to be changed if necessary. | |||
| It should be noted that - with patience - every mechanical combination padlock can be cracked without any special skill, unlike the key version. | |||
| == Uses == | |||
| Padlocks have a wide variety of uses. In some schools, workplaces, etc. they may be used to keep ] secure. Very small padlocks can be attached to ] when travelling, to prevent casual thieves (and, possibly, airport staff and baggage handlers) from opening the case. Padlocks are also used as part of the security measures on commercial and industrial sites, particularly for outdoor areas. | |||
| == History == | |||
| In the late 17th century ] started a factory in ] that among other things produced a padlock of his own invention, the Scandinavian padlock ("Polhem locks"). | |||
| Harry Soref founded the ] in 1921 and patented an improved padlock. In April 1924, he received a patent (U.S #1,490,987) for his new lock casing. Soref made a padlock that was both strong and cheap using a case constructed out of layers of metal, like the doors of a bank vault. He designed his padlock using laminated steel. | |||
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Revision as of 20:29, 2 December 2006
fuck you bitch!!