Deadbolt Locks

Aura Bluetooth Smart Lock is a keyless entry Aura Bluetooth Smart Lock is a keyless entry electronic deadbolt featuring SmartKey. Using the Kwikset App within Bluetooth range you can lock/unlock the Aura Smart Lock and program up to 250 user access codes that can be scheduled and customized. Some keyless door locks also include a keypad so that you can unlock the door by entering a code. Even if you don't have your phone with you, you can still get inside without a key. Keypad door locks also give you the ability to create additional codes to share with friends and family.

A dead bolt, deadbolt or dead lock is a locking mechanism distinct from a spring bolt lock because a deadbolt cannot be moved to the open position except by rotating the key. The more common spring bolt lock uses a spring to hold the bolt in place, allowing retraction by applying force to the bolt itself. A deadbolt can therefore make a door more resistant to entry without the correct key.^{[citation needed]}

A deadbolt is often used to complement a spring-bolt lock on an entry door to a building.

Common types[edit]

A deadlock, if it is cylinder operated, may be either single cylinder or double cylinder. A single cylinder deadlock will accept a key on one side of the lock, but is operated by a twist knob on the other side. Double cylinder locks will accept a key on both sides and therefore do not require (and often do not have) any twist knob. This prevents unwanted unlocking of the door by forced access to the interior twist knob (via a nearby window, for example). Double cylinder locks are sometimes banned from areas because they can be difficult to open from the inside and violate fire safety regulations. Some lock manufacturers also have a 'lockable' knob: a key is always needed on one side (usually external), and a twist knob can be used on the other (internal), unless a button has been pressed, in which case a key is also needed on the internal side.^[1][2]

A variant of the standard deadbolt is the vertical deadbolt, invented by Samuel Segal. Vertical deadbolts resist jimmying, in which an intruder inserts a pry bar between the door and the jamb and attempts to pry the bolt out of the door.

Other types of deadbolts include:

• Classroom-function (thumb-turn only unlocks door)
• Exit-only function (no external cylinder)
• Push-button deadbolt (mechanical or electrical)
• Single cylinder with removable thumb-turn

Safety[edit]

Brain dots level 175 chart. The double cylinder design raises a safety issue. In the event of a fire, occupants will be prevented from escaping through double-cylinder locked doors unless the correct key is used. This is often an avoidable cause of death in house fires.^[3] The risk can be mitigated by locking the deadlock only when there are no occupants inside the building, or leaving the key near the keyhole. Some fire departments suggest putting the key on a small nail or screw near the door at floor level, since the cleanest air is at floor level and you may be crawling to get to the exit, thus placing the key where it is easiest to find.

Note that single cylinder dead locks (with an unlocked twist mechanism on the inside of the door) do not have this problem, and therefore are most commonly used on fire exits. Some areas have fire safety codes that do not allow a locked exit.^[4][5]

See also[edit]

References[edit]

1. ^Abloy. 'Lockable Thumbturn H2X Deadbolts'. Retrieved 2011-10-22.
2. ^Abloy. 'Lockable Thumbturn H2X Deadbolts'. Retrieved 2011-10-22.
3. ^Kennedy, Les (2004-06-08). 'Deadlocked doors seen as fatal in house fire'. The Sydney Morning Herald. Retrieved 2010-11-16.
4. ^'Hardware requirements for access and egress'(PDF). Canada government. Archived from the original(PDF) on 27 March 2014. Retrieved 12 June 2014.
5. ^'Building Codes (p.127)'(PDF). New York City. Retrieved 12 June 2014.