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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 ...
Walter Schlage. Walter Reinhold Schlage (1882–1946) was a German-born American engineer and inventor. Known as the Lock Wizard of Thuringia, he is best known for the bored cylindrical lock and the lock company that bears his name, Schlage Lock Co.
However, Schlage's key invention was the bored cylindrical lock, which evolved through several iterations, including a 1917 filing for a mortise mechanism which locked when the knob was tilted, [5] one in April 1920 for a lock requiring one hole and a surface rabbet rather than a complex mortise pocket, [6] and another the same year in October ...
In most parts of the world, mortise locks are found on older buildings constructed before the advent of bored cylindrical locks, but they have recently become more common in commercial and upmarket residential construction in the United States. [citation needed] The design is widely used in domestic properties of all vintages in Europe.
By use of an appropriate control key, interchangeable cores can be extracted from one lock type (bored cylindrical lock, mortise lock, padlock, and so forth) and then installed into another without requiring the removal or disassembly of any single component.
Metal fire-resistance rated door with a lockset consisting of a locking latch bolt operated by lever handle with an escutcheon that encompasses the locking mechanism.. A lockset (alternatively lock set) is the hardware and components that make up the locking or latching mechanism that can usually be found on a door or other hinged object but can also include sliding doors and dividers. [1]