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The locks can log the times of entry, and can trigger an alarm if they are struck during a break-in attempt. Deadbolts — unlike common spring latches , the locking mechanism of these typically prevents the bolt from being retracted by force, or shimming, and it cannot be moved to the open position except by rotating the key.
This example has two bolts: a sprung latch at the top, and a locking bolt at the bottom. Right: the box keep, installed in the doorjamb. A mortise lock (also spelled mortice lock in British English) is a lock that requires a pocket—the mortise—to be cut into the edge of the door or piece of furniture into which the
By the use of a latch bolt, a door can be closed without having to operate the handle. Deadbolt – Deadbolts usually extend deeper into the frame and are not automatically retractable the way latch bolts are. They are typically manipulated with a lock on the outside and either a lock or a latch on the inside.
This is an accepted version of this page This is the latest accepted revision, reviewed on 20 December 2024. Device to open or close door Various examples of door handles throughout history A door handle or doorknob is a handle used to open or close a door. Door handles can be found on all types of doors including exterior doors of residential and commercial buildings, internal doors, cupboard ...
Many combination locks have three wheels, but the lock may be equipped with additional wheels, each with a drive pin and fly, in a similar manner. The number of wheels in the mechanism determines the number of specific dial positions that must be entered to open the lock, so a three-sequence combination is required for a three-wheel lock.
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