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  2. Electronic lock - Wikipedia

    en.wikipedia.org/wiki/Electronic_lock

    An electronic lock (or electric lock) is a locking device which operates by means of electric current. Electric locks are sometimes stand-alone with an electronic control assembly mounted directly to the lock. Electric locks may be connected to an access control system, the advantages of which include: key control, where keys can be added and ...

  3. Electromagnetic lock - Wikipedia

    en.wikipedia.org/wiki/Electromagnetic_lock

    The principle behind an electromagnetic lock is the use of electromagnetism to lock a door when energized. The holding force should be collinear with the load, and the lock and armature plate should be face-to-face to achieve optimal operation. The magnetic lock relies upon some of the basic concepts of electromagnetism.

  4. Lock and key - Wikipedia

    en.wikipedia.org/wiki/Lock_and_key

    A typical modern padlock and its keys. A lock is a mechanical or electronic fastening device that is released by a physical object (such as a key, keycard, fingerprint, RFID card, security token or coin), by supplying secret information (such as a number or letter permutation or password), by a combination thereof, or it may only be able to be opened from one side, such as a door chain.

  5. Phase-locked loop - Wikipedia

    en.wikipedia.org/wiki/Phase-locked_loop

    Phase-locked loop. A phase-locked loop or phase lock loop ( PLL) is a control system that generates an output signal whose phase is fixed relative to the phase of an input signal. Keeping the input and output phase in lockstep also implies keeping the input and output frequencies the same, thus a phase-locked loop can also track an input frequency.

  6. Remote keyless system - Wikipedia

    en.wikipedia.org/wiki/Remote_keyless_system

    Remote keyless system. A remote keyless system ( RKS ), also known as remote keyless entry (RKE) or remote central locking, is an electronic lock that controls access to a building or vehicle by using an electronic remote control (activated by a handheld device or automatically by proximity). [1] RKS largely and quickly superseded keyless entry ...

  7. Power door locks - Wikipedia

    en.wikipedia.org/wiki/Power_door_locks

    Power door locks. Power door locks (also known as electric door locks or central locking) allow the driver or front passenger to simultaneously lock or unlock all the doors of an automobile or truck, by pressing a button or flipping a switch . Power door locks were introduced on the luxury Scripps-Booth in 1914, but were not common on luxury ...

  8. Latch - Wikipedia

    en.wikipedia.org/wiki/Latch

    A latch or catch (called sneck in Northern England and Scotland) is a type of mechanical fastener that joins two (or more) objects or surfaces while allowing for their regular separation. A latch typically engages another piece of hardware on the other mounting surface. Depending upon the type and design of the latch, this engaged bit of ...

  9. Combination lock - Wikipedia

    en.wikipedia.org/wiki/Combination_lock

    A Wordlock letter combination lock.. A combination lock is a type of locking device in which a sequence of symbols, usually numbers, is used to open the lock. The sequence may be entered using a single rotating dial which interacts with several discs or cams, by using a set of several rotating discs with inscribed symbols which directly interact with the locking mechanism, or through an ...

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