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2. Sliding door operator - Wikipedia

   en.wikipedia.org/wiki/Sliding_door_operator

   A sliding door operator (or sliding door opener or automatic sliding door operator) is a device that operates a sliding door for pedestrian use. It opens the door automatically, waits, then closes it.

3. Automatic door - Wikipedia

   en.wikipedia.org/wiki/Automatic_door

   In 1954, Dee Horton and Lew Hewitt invented the first sliding automatic door. The automatic door used a mat actuator. In 1960, they co-founded Horton Automatics Inc and placed the first commercial automatic sliding door on the market. [5] With the invention of the Gunn diode, microwave motion detectors became common in automatic doors in the ...

4. 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.

5. Swing-door operator - Wikipedia

   en.wikipedia.org/wiki/Swing-door_operator

   Shades of blue: standard door closer. Shades of red: opener gears. Gold: motor. Operators use various internal technologies. Some are built on top of a standard door closer. To open the door, the operator forces the closer in the opening direction. Then, the closer closes the door. The user may open the door manually, using just the door closer.

6. 100 “One Size Fits All” Presents That Will Please Everyone

   www.aol.com/only-gift-guide-100-christmas...

   Review: "LOVE!!! so warm, so cozy, and great for sliding across a hardwood floor. These have kept my tootsies toasty all winter. 10/10, highly recommend." These have kept my tootsies toasty all ...

7. 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.