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Lock pin
History
The basic principles of the lock pin can be dated as early as 2000 BC in Egypt, the blockade was on a pole wood at the door, and a horizontal bolt that slid into the post. The bolt had vertical openings in which followed a series of pins. These could be lifted, using a key, high enough to allow the bolt to move and open the door.
Linus Yale, father invented a lock pin beaker in 1848, a design which was further improved and patented by his son, Linus Yale Jr. in 1875. Yale, design Jr. 's is very similar to pin tumbler locks manufactured today.
Design
The pins are commonly used in cylinder locks. In this block, an outer casing has a cylindrical bore in which is the plug. To open the lock, the plug must rotate.
The plug has a straight shaped slot known as slot at one end to allow the key to enter the plug, the other end may have a cam or lever that activates a mechanism to retract a bolt. The key must often stand projections that serve to prevent the key pins from falling into the plug, and make the lock more resistant to the collection. A series of holes, usually five or six of them are drilled vertically into the socket. These holes contain Key pins of various lengths, which are rounded to allow the key to slide over them easily.
Above each key pin is a corresponding set of pins control, which are spring. Simpler locks typically have only one driver pin for each key pin, but locks requiring access to any key, as a group of locks with a master key, you can have extra driver pins known as spacer pins. The outer casing has several vertical shafts, which have pins spring.
When the stopper and the outer cover is mounted, tighten the plug down by springs. The point where it is called the plug and cylinder meet point court. Using a properly cut and inserted into the slot in the plug end, the pin will rise causing them to align exactly at the cutoff. This allows the plug to rotate, thus opening the lock. When the key is not in the lock, the pins are at the cutting point, preventing the plug from turning. Games of locks with a master key will have a set of cut points are identical to others in the group and a set that is unique to that specific lock.
See also
Lock cylinder
Lock Disc
Wafer Lock
Key relevance
Lock picking
Magnetic with lock code
Patent
U.S. Patent 31 278 - Lock
U.S. Patent 8071 - Lock
U.S. Patents 9850 - Lock
Links External
The invention of pins on the Yale company site
Categories: LocksHidden categories: Articles needing citations in the text in June 2009 | All Articles that need references in the text About the Author
I am China Manufacturers writer, reports some information about combustible gas detector , handheld metal detector.
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