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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

   The door holders release, allowing the doors to close automatically using door closers. [1] [2] The electric power to keep the doors open is typically 12 VDC, 24 VDC (common), 24 VAC, 120 VAC, or 240 VAC. The closed doors may or may not mechanically latch or lock in the closed position.

4. Door loop - Wikipedia

   en.wikipedia.org/wiki/Door_loop

   Electrically controlled door closer which receives electricity via a (visible) door loop. A door loop or door cord [1] is a mechanical device which provides a robust guideway for cabling between a swing door (the "door leaf") and a door frame. Door loops are described in the NFPA 80 standard for fire doors. [1] [2]

5. Fire door - Wikipedia

   en.wikipedia.org/wiki/Fire_door

   The intumescent and smoke-seal bounding of fire doors should be routinely checked, as should the action of the door closer and latch. Some fire doors are held open by an electromagnet, which is typically wired to a fire alarm system. If the power fails or the fire alarm is activated, the coil is de-energized, and the door closes.

6. Deviled Eggs Are Even Better When They’re Fried - AOL

   www.aol.com/deviled-eggs-even-better-fried...

   Peel the hard-boiled eggs and cut them in half lengthwise. Remove the yolks to a medium bowl and mash with a fork until they’re broken up. Add the mayonnaise, mustard, pickle juice, pepper, 1/4 ...

7. Doorstop - Wikipedia

   en.wikipedia.org/wiki/Doorstop

   A doorstop (applied) may also be a small bracket or 90-degree piece of metal applied to the frame of a door to stop the door from swinging (bi-directional) and converting that door to a single direction (in-swing push or out-swing pull). The doorstop can be a separate part or integrated with a hinge or door closer.