Mechanical devices used to duplicate keys, particularly those manufactured before widespread computerization, represent a distinct category of tools. These apparatuses often employed intricate systems of levers, gears, and cutting wheels to precisely carve the grooves of a new key based on the pattern of an existing one. Examples include models manufactured by companies like Keil and Ilco, often recognizable by their robust cast-iron construction and manual operation.
These older machines offer valuable insights into the history of security and locksmithing. Their enduring appeal stems from factors such as their durability, the satisfying tactile experience they provide, and the potential for precise key duplication even in the absence of electricity. Furthermore, certain antique locks require keys cut by such machines due to the unique bitting styles not easily replicated by modern, automated equipment. The preservation and continued use of these tools, therefore, play a crucial role in maintaining access to historically significant structures and mechanisms.