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Mortise lock. The two main parts of a mortise lock. Left: the lock body, installed in the thickness of a door. 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 ...
Single-point locking. Single-point locking is a locking system in cabinet doors where locking takes places only at the point halfway up the edge of the door, where the latch engages with the doorjamb. The term is most often used in items like lockers, where it is contrasted with the much more secure three-point locking, which uses movable rods ...
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.
Latch. A latch or catch (called sneck in Northern England and Scotland) is a type of mechanical fastener that joins two (or more) objects or surfaces while allowing for their regular separation. A latch typically engages another piece of hardware on the other mounting surface. Depending upon the type and design of the latch, this engaged bit of ...
The cylindrical lock was invented by the German-born engineer Walter Schlage [4] in 1923. [5] The bored cylindrical lock arose from a need for a more cost-effective method of locking doors. The previous norm (still the norm in Europe), the mortise lock, is a more complex device, and its higher manufacturing cost as well as its more labor ...
Night latch. 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]
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