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  2. Electromagnetic lock - Wikipedia

    en.wikipedia.org/wiki/Electromagnetic_lock

    Since electromagnetic locks do not interact with levers or door knobs on a door, typically a separate release button that cuts the lock power supply is mounted near the door. This button usually has a timer that, once the button is pressed, keeps the lock unlocked for either 15 or 30 seconds in accordance with NFPA fire codes.

  3. Electronic lock - Wikipedia

    en.wikipedia.org/wiki/Electronic_lock

    Electric locks use magnets, solenoids, or motors to actuate the lock by either supplying or removing power. Operating the lock can be as simple as using a switch, for example an apartment intercom door release, or as complex as a biometric based access control system. There are two basic types of locks: "preventing mechanism" or operation ...

  4. Electromagnetic door holder - Wikipedia

    en.wikipedia.org/wiki/Electromagnetic_door_holder

    A simple electromagnetic door holder consists of a strong electromagnet, usually attached to a wall or mounted in a floor pedestal enclosure, next to the door it controls. The mechanism may be mounted near the floor, at the upper corner of the open door, or at any convenient height along the latch edge (away from the hinged edge).

  5. Electric strike - Wikipedia

    en.wikipedia.org/wiki/Electric_strike

    This is used in many residential, commercial and industrial applications, the Hold-open function ease usage because the powering of the strike and the opening of the strike do not need to be exactly synchronized. Fail-safe. Also called fail-open. In this configuration, applying electric current to the strike will cause it to lock.

  6. Remote keyless system - Wikipedia

    en.wikipedia.org/wiki/Remote_keyless_system

    Two hikers, for example, can leave the keys in the glove box, lock the door, and either hiker can return later to access the vehicle via their own code. The keypad also allows a user to walk away from a running vehicle, e.g., to warm up the vehicle in cold weather, returning to unlock the vehicle by the keypad.

  7. Mortgage rate locks: What they are, how they work - AOL

    www.aol.com/finance/what-is-mortgage-rate-lock...

    How much do rate locks cost? You’ll usually pay 0.25% to 1% of your loan amount for a rate lock, depending on the lender. On a $400,000 mortgage loan, that’s the equivalent of paying from ...