For now, though, let’s look at some of its fascinating history-a history that’s tightly intertwined with the history of locks in general. We’ll discuss more how a mortise lock operates later in this article. It should be pointed out that the distinguishing feature of a mortise lock-and what makes it such a secure and sought-after lock-is that the entire lock mechanism is held in a rectangular box That box is inserted into a special pocket carved into the side of a door. Thus, it can be hard to deal with them apart from the rest of locks and locksmithing throughout history. It’s because mortise locks have shared features and been integrated with other types of locks throughout their long history. Words and phrases that come up when you mention a mortise lock include “durable,” “long-lasting,” “complicated,” “like a puzzle, “and “mysterious.” How in the world did it ever come to have all these attributes associated with it? It will also discuss how the mortise lock differs from its less expensive competitor, the cylinder (or cylindrical) lock. This article will look at the timeless mortise lock, its history, its construction, and its uses. In fact, mortise locks are still considered among the most secure locks around. While it’s true that mortise locks have been around for centuries, even millennia. Website: you ever see an old mortise lock-or the key to one-and think, wow, what a gorgeous antique lock? Or maybe you thought, that looks like something out of a children’s mystery story? Yale Commercial Locks and Hardware, 1902 Airport Road, Monroe, NC 28110.Schlage Lock Company, 111 Congressional Blvd., Suite 200, Carmel, IN 46032.Sargent Manufacturing Company, 100 Sargent Drive, P.O.Corbin Russwin, 1902 Airport Road, Monroe, NC 28110.The exploded view drawings are: Corbin Russwin ML2051, Sargent 8291, Schlage K6452, Schlage L9453 and Yale 8747.įor more information, contact your local locksmith wholesaler or: Each exploded view includes a legend listing of the parts that comprise each manufacturer's mortise lock. We requested Entrance Lock exploded view drawings from a number of mortise lock manufacturers. Also, the interior lever/knob retracts deadbolt and latch bolt simultaneously. When locked, the key operating the mortise cylinder retracts the deadbolt and latch bolt simultaneously. However, the deadbolt can be retracted by rotation of thumb turn. The outside lever/knob will not unlock and unlatch the mortise lock. Throwing the deadbolt automatically locks outside lever/knob. When the outside is locked by rotation of thumb turn, the deadbolt is thrown. When unlocked, the latch bolt can be retracted by lever/knob from either side. The generalized function of the Entrance Lock is as follows: On the interior, a thumb turn and lever/knob. From the exterior, this lock has a mortise cylinder and lever/knob. The Entrance Lock is equipped with a latch bolt and a deadbolt. The Entrance Lock is a very common mortise lock that would over time, require service. However, when servicing a mortise lock, it is advisable to take a digital photograph of the lock, mark the locations of the components with colored markers, and/or put scratch marks on parts to identify position. These exploded view drawing and parts charts can be helpful during re-assembly. Putting together a mortise lock can sometimes feel like try to re-assemble a puzzle box.įor this reason, we have included a number of mortise lock exploded views from different manufacturers. Just about every lock manufacturer has its own design for every mortise lock function. Once the external components have been removed, the mortise lock body is removed from the edge of the door. Servicing mortise locks requires removal of the mortise cylinder, the levers (or knobs), the spindles, and the escutcheons. In fact, there are mortise locks with modified internal components and combined with extra heavy-duty trim designed to resist forced entry. There are mortise locks for just about every application. Lock manufacturers are developing mortise locks with additional functionality and improved security to meet the needs of our ever-changing world. The mortise lock, a longtime industry standard, continues to be installed into commercial, institutional and residential applications.
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