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A mortise lock (also spelled mortice lock in British English) is a lock that requires a pocket—the mortise—to be cut into the edge of the door or piece of furniture into which the lock is to be fitted.
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").
Mortise or mortice may refer to: Mortise and tenon, a woodworking joint; Ankle mortise, part of the distal tibia joining the talus bone to form an ankle joint; Mortise chisel, a type of chisel; Mortice lock, a lock with a bolt set within the door frame, rather than attached externally
A chain mortiser used in timber framing. For cutting larger mortises such as those used in timber frame construction, chain mortisers are commonly used. A chain with cutters (similar to a chainsaw chain) rotating within a frame clamped to the work is successively plunged into the workpiece to mortise out the required volume.
The mortise is drilled 1 ⁄ 16 inch (1.6 mm) smaller than the treenail to create a tight fit and take advantage of friction in the mortise. In cases where the treenail is 24 inches (61 cm) or longer, the treenail should be shaped 1 ⁄ 8 inch (3.2 mm) smaller than the other half.
Animation of a lever tumbler lock mechanism. A lever tumbler lock is a type of lock that uses a set of levers to prevent the bolt from moving in the lock. [1] In the simplest form of these, lifting the tumbler above a certain height will allow the bolt to slide past.
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Some mortise gauges are designed with one retractable spur, so that they can be used as marking gauges as well; [6] however, because the mortise gauge is an expensive and high precision tool, many carpenters prefer to have a separate marking gauge for general use.