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When inside key locks the outside handle, only the inside key can unlock the outside handle: the outside key only retracts the latch bolt once outside handle is unlocked by inside key. Deadlocks Cylindrical Mortise Function label Description Example locations E2161 [15] F18 [10] Deadlock with Blank plate Deadbolt operated by key outside only ...
Some lock manufacturers also have a "lockable" knob: a key is always needed on one side (usually external), and a twist knob can be used on the other (internal), unless a button has been pressed, in which case a key is also needed on the internal side. [3] A variant of the standard deadbolt is the vertical deadbolt, invented by Samuel Segal.
The key design is a U-shape profile with six cuts on each side of the key, along with a central roller to activate the trigger pin in the front and center of the cylinder. [ 1 ] In order for the lock to operate, the key must be fully inserted, allowing the dual sidebars to enter the pins, provided the pins were raised to the correct height ...
In warded locks, the key cuts bypass the wards so the key can push or pull the bolt. [6] Key pin In a pin tumbler lock, the key pin is in contact with the key. It has varying lengths, corresponding to the key's bitting cuts. When the pins are above the plug, the key pin is also known as the bottom pin. Lock housing The lock housing is the part ...
Warded locks contain a series of static obstructions, or wards, within the lock box; only a key with cutouts to match the obstructions will be able to turn freely in the lock and open the latch. [4] Warded locks were used in Europe throughout the medieval period and up until early 19th century.
Three-point locking, or a multipoint lock, is a locking system installed in cabinet or locker doors to enable more secure locking. Whereas in single-point locking , the door on a cabinet locks only at the point where the key is turned, halfway up the edge of the door, three-point locking enables the top and bottom of the door to be ...
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