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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.
A tubular lock and key. A tubular pin tumbler lock, also known as a circle pin tumbler lock, radial lock, or the trademark Ace lock popularized by manufacturer Chicago Lock Company since 1933, is a variety of pin tumbler lock in which a number of pins are arranged in a circular pattern, and the corresponding key is tubular or cylindrical in shape.
The National Senior Games (Senior Olympics) are a sports competition for senior citizens in the United States. It is conducted by the National Senior Games Association (NSGA) once every two years. Akin to the Summer Olympics, it is a multi-sport event devoted to adults above the age of 50. It consists of regional competitions held yearly in all ...
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The impression of a person's nose and mouth on a pinscreen. Pin art, also known as a pinscreen, is an executive toy.It consists of a boxed surface made of a crowded array of pins that are free to slide in and out independently in a screen to create a three-dimensional relief.
A puzzle lock or puzzle padlock is a type of mechanical puzzle.It consists of a lock with unusual or hidden mechanics. Puzzle locks are reconfigurable mechanisms where the topological structure changes during the operation. [1]
The back and front of a pin-back button for World Yodel Day. A pin-back button or pinback button, pin button, button badge, or simply pin-back or badge, is a button or badge that can be temporarily fastened to the surface of a garment using a safety pin, or a pin formed from wire, a clutch or other mechanism.