These locks are comprised of an internal system which categorizes them more as locksets, rather than just locks. Eventually, this pull was replaced with a doorknob. Mortise locks have in use since the eighteenth century, with earlier versions featuring a pull to unlock the door. While they are most often seen on commercial properties, they can be used on residential homes provided that they have enough space for them to operate. Mortise locks are incredibly powerful and, like deadbolts, are typically used on exterior doors. The deadbolt lock got its name from the fact that it does not feature any internal spring-loaded mechanisms like other bolts – for all intents and purposes, the lock is “dead.” These locks can be traced back to the 1800s, when banks started using locks that required keys on their safes. Deadbolt locks come in single- and double-cylinder models. Most exterior doors are pre-drilled to fit deadbolts, which makes installation a breeze. They are designed to provide extra security for exterior doors and to be used in combination with a door knob lock or lever lock. These locks offer maximum security for your front door. They reduce the risk of unwanted entry by creating a secure locking system that makes it virtually impossible for intruders to break down the door. Deadbolt locks are a mechanism that is separate from the door knob, adding an extra layer of security to entry doors. Though, commercial property owners also use deadbolt locks to ensure safety and security for their businesses and facilities. Although, in 1818, three locksmiths in Britain developed the design or the tumbler lock, which the knob locks of today are based on.ĭeadbolt locks are, undeniably, the most popular type of exterior door lock and are commonly used on the exterior doors of residential properties. He created a doorknob with an internal door-latching system. Knob locks date back to the 1800s, with the first patent given to Osborn Dorsey, an African American inventor, in 1878. Knob locks feature knobs on both sides of the door, and may have either a single or double cylinder depending on whether or not you also want to be able to lock the door from the inside. Because of this, knob locks on a front door are often seen paired with a deadbolt or another, more secure, type of lock. When a knob lock is placed on an exterior door, it creates a situation where your home can easily be broken into. While many choose to use these locks on both interior and exterior doors, they are best used indoors as they don’t provide as much security as many other types of exterior locks. The distinguishing feature of this type of knob lock is that the lock cylinder is located inside of the knob, rather than inside of the door. They are used by nearly everyone to lock up their home or business on a daily basis. Beginning with the most common type of door lock, knob locks are often seen on doors that lead to the outside.
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