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Again, the term refers to the lock mechanism, so a lock can be both a mortise lock and a lever tumbler lock. In the modern lever tumbler lock, the key moves a series of levers that allow the bolt to move in the door. [5] Pin tumbler lock, commonly used for mortise locks in the US. The next major innovation to mortise lock mechanisms came in 1865.
Bitting also refers to the combination of key cuts on a bit key for a warded lock or lever tumbler lock. The exact geometry of modern keys is usually described by a code system. [ 1 ] The bitting instructs a locksmith how to cut a certain key, to replace a lost key or make an additional copy.
A night latch (or night-latch or nightlatch) is a lock that is fitted on the surface of a door; it is operated from the exterior side of the door by a key and from the interior (i.e. "secure") side of the door by a knob. [1] [2] [3]
The lock housing is the part of the lock that does not move when the lock is opened. It is responsible for transferring the action of the key to the bolt. [7] Master pin In a pin tumbler lock, a master pin is an optional, usually short, disk-like pin placed between the top and bottom pins. Its purpose is to allow two differently-cut keys to ...
A mortise is a hole cut into a timber to receive a tenon. There are several kinds of mortise: [16] Open mortise: a mortise that has only three sides. (See bridle joint). Stub mortise: a shallow mortise, the depth of which depends on the size of the timber; also a mortise that does not go through the workpiece (as opposed to a "through mortise").
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Key relevance is the measure of similarity between the key and the optimal size needed to fit the lock, or it is the similarity between a duplicate key and the original it is seeking to replicate. Key relevance cannot be deduced from a key code , since the key code merely refers to a central authoritative source for designed shapes and sizes of ...
Like the simpler marking gauge, a mortise gauge has a locking thumb screw slide for adjusting the distance of the scribe from the edge of the wood. It has two protruding pins, often called "spurs", [3] which are designed to scribe parallel lines marking both sides of a mortise at the same time. [4]