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2. 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).

3. Electromagnetic lock - Wikipedia

   en.wikipedia.org/wiki/Electromagnetic_lock

   Magnetic locks are almost always part of a complete electronic security system. Such a system may simply consist of an attached keycard reader or may be more complex, involving connection to a central computer that monitors the building's security. Whatever the choice of locking system, fire safety is an important consideration. [2]

4. Keycard lock - Wikipedia

   en.wikipedia.org/wiki/Keycard_lock

   Keycard systems operate by physically moving detainers in the locking mechanism with the insertion of the card, by shining LEDs through a pattern of holes in the card and detecting the result, by swiping or inserting a magnetic stripe card, or in the case of RFID or NFC cards, merely being brought into close proximity to a sensor.

5. Magnetic keyed lock - Wikipedia

   en.wikipedia.org/wiki/Magnetic_keyed_lock

   A magnetic keyed padlock A magnetic keyed padlock. A magnetic keyed lock or magnetic-coded lock is a locking mechanism whereby the key utilizes magnets as part of the locking and unlocking mechanism. Magnetic-coded locks encompass knob locks, cylinder locks, lever locks, and deadbolt locks as well as applications in other security devices.

6. You Might Be Using Your Door Stoppers Wrong: Here's How They ...

   www.aol.com/might-using-door-stoppers-wrong...

   For one, adjusting your door hinges can go a long way in helping your door stay open. Second, consider investing in a magnetic door stopper, which will give you the best of both worlds: A stop and ...

7. This #1 bestselling smart garage door opener is down to $23 ...

   www.aol.com/lifestyle/win-shoppers-amazon...

   The MyQ Smart Garage Door Opener is universal, so it works with your existing garage (no need to replace the door). Just add this smart home system to your existing opener (as long as it was made ...

8. Swing-door operator - Wikipedia

   en.wikipedia.org/wiki/Swing-door_operator

   Pushbutton – the door opens when a user presses a button. Push-&-go – the door opens fully when the user begins opening it. Access control – the door opens when an access control system determines the user is authorized to go through. A trigger from any of the above requests that the door be opened (or reopened if it was closing).

9. The Carnivore Diet Wants to Convince You to Eat a Stick of ...

   www.aol.com/carnivore-diet-wants-convince-eat...

   (Ruminant meat hails from animals with a ruminant digestive system, including cows, sheep, goats, bison, and deer). This degree of restriction is less common than other forms of animal-based diets ...