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  2. Crash bar - Wikipedia

    en.wikipedia.org/wiki/Crash_bar

    When the bar is depressed, a chord within the vertical rod gets pulled, which lowers a latch at the top and/or bottom and allows the door to open. The Pullman latch, which attaches to a Pullman keeper, is the locking mechanism usually used at the ends of the vertical rods. [8] More expensive products may feature vertical rods and latches ...

  3. Electric strike - Wikipedia

    en.wikipedia.org/wiki/Electric_strike

    An electric strike is an access control device used for door frames. It replaces the fixed strike faceplate often used with a latch (also known as a keeper). Like a fixed strike plate, it normally presents a ramped or beveled surface to the locking latch allowing the door to close and latch just like a fixed strike would.

  4. Three-point locking - Wikipedia

    en.wikipedia.org/wiki/Three-point_locking

    Three point lock are also commonly used in wardrobes, like from Hettich [6] [7] Single-point locking may provide adequate security for some situations on tiered lockers, as the doors are shorter, and therefore more difficult to force open; however, the taller doors of full length lockers and cabinets are more susceptible to the application of leverage.

  5. Is the hood on your Tesla not latching? There's a ... - AOL

    www.aol.com/hood-tesla-not-latching-theres...

    Tesla says the latch issue can be easily fixed with a free software update. It does not require in-person service. However, if you have trouble updating your Tesla, you can take it to one of the ...

  6. Door closer - Wikipedia

    en.wikipedia.org/wiki/Door_closer

    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. Door closers can be linked to a building's fire and security alarm systems. [2]

  7. Ladder logic - Wikipedia

    en.wikipedia.org/wiki/Ladder_logic

    This circuit shows a push button that closes a door and an obstruction detector that senses if something is in the way of the closing door. When the normally open push button contact closes and the normally closed obstruction detector is closed (no obstruction detected), electricity is able to flow to the motor which closes the door.

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  9. 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.

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