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  2. Door closer - Wikipedia

    en.wikipedia.org/wiki/Door_closer

    Modern manual door closer Eclipse door spring and separate checking mechanism. A door closer is a mechanical device that regulates the speed and action of a door’s swing. [1] Manual closers store the force used to open the door in some type of spring and reuse it to close the door. Automatic types use electricity to regulate door swing behavior.

  3. Electromagnetic door holder - Wikipedia

    en.wikipedia.org/wiki/Electromagnetic_door_holder

    An electromagnetic door holder (electromagnetic door holder and release or hold-open device, sometimes informally called a mag hold open or electric doorstop) is a simple electromechanical mechanism which can be used to hold a fire door or security door open until given a signal to release.

  4. Platform screen doors - Wikipedia

    en.wikipedia.org/wiki/Platform_screen_doors

    Platform screen doors at a Guadalajara Macrobús station. Platform screen doors are present at various bus rapid transit systems in Mexico, such as at the stations of the Guadalajara Macrobús and the Ecovía system of Monterrey. Platform screen doors can be seen as well on the Aerotrén, an airport people mover at Mexico City International ...

  5. Swing-door operator - Wikipedia

    en.wikipedia.org/wiki/Swing-door_operator

    Then, the closer closes the door. The user may open the door manually, using just the door closer. In case of power failure while the door is open, the closer itself closes the door. Some are built without a door closer. The motor opens and closes the door through reducing gears. The operator may or may not include a return spring to close the ...

  6. Dihedral synchro-helix actuation doors - Wikipedia

    en.wikipedia.org/wiki/Dihedral_Synchro-Helix...

    The dihedral synchro-helix actuation door system is a type of door with a hinge mechanism which allows the doors to rotate 90° by sweeping outwards and upwards at the hinge. [1] It was designed and developed by Christian von Koenigsegg on behalf of high-performance sports cars manufacturer, Koenigsegg Automotive AB . [ 2 ]

  7. Why You Should Always Close the Interior Doors in Your Home ...

    www.aol.com/lifestyle/why-always-close-interior...

    Closing all interior doors helps disperse the pressure throughout your home, reducing the effect that all of that force can have on your roof — basically the one thing that separates you from ...

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