Rim lock is a locking device mounted on the surface of a door, distinct from mortise locks that are embedded within the door itself. Characterised by its external placement, this lock typically features a basic mechanism involving a bolt, keyhole, and sometimes a latch. The design of the rim lock makes it suitable for installation on various door types without the need for extensive modifications to the door structure.
Originating in the late 1800s, rim locks were among the earliest lock designs used in residential spaces, reflecting a blend of functionality and decorative appeal. They remain popular in heritage and period-style properties, where maintaining architectural authenticity is desired. The lock's external housing often displays ornamental designs ranging from Victorian to Art Deco styles, contributing both security and aesthetic value to entrances.
Rim locks are available in a variety of materials including brass, iron, and steel, each offering different levels of security and durability. The simplicity of their mechanism allows for easy installation and repair, making them a favored choice in both historical and contemporary settings where surface-mounted locks are appropriate.