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2. Door closer - Wikipedia

   en.wikipedia.org/wiki/Door_closer

   Spring hinge uses a spring mounted in a hinge and is integral to its design. The spring can be either visible or hidden within a tube and can be found more commonly on interior doors. When used on doors that open both ways they are known as double action spring hinges. Self-closing hinges are an alternative to using a door closer.

3. Geared continuous hinge - Wikipedia

   en.wikipedia.org/wiki/Geared_continuous_hinge

   A geared continuous hinge is a type of continuous hinge used mostly on doors in high-traffic entrances and features gear teeth that mesh together under a cap that runs the length of the hinge. The hinges use a number of fasteners to attach the door to the frame from top to bottom to distribute a door’s weight more evenly along the frame to ...

4. Hinge - Wikipedia

   en.wikipedia.org/wiki/Hinge

   This hinge pivots in openings in the floor and the top of the door frame. Also referred to as double-acting floor hinges, they are found in ancient dry stone buildings and, rarely, in old wooden buildings. They are a low-cost alternative for use with lightweight doors. [7] Doors with these hinges may be called haar-hung doors. Self-closing hinge

5. Electric gate - Wikipedia

   en.wikipedia.org/wiki/Electric_gate

   Note also the Infrared obstacle sensor located on the wall to prevent the gate from closing while a vehicle or other obstacle is in the way. Driveway gate openers can be the rollback (sliding) type that retracks a gate along the fence or wall on wheels or bearing, or the swing type that draws the gate open or closed on hinges.

6. Doorstop - Wikipedia

   en.wikipedia.org/wiki/Doorstop

   A third strategy is to equip the door itself with a stopping mechanism. In this case, a short metal bar capped with rubber, or another high-friction material, is attached to a hinge near the bottom of the door opposite the door hinge and on the side of the door which is in the direction that it closes. When the door is to be kept open, the bar ...

7. Stock market today: Indexes mixed as traders take in Fed ...

   www.aol.com/stock-market-today-indexes-mixed...

   Here's where US indexes stood at the 4:00 p.m. closing bell on Wednesday: S&P 500: 5,918.25, up 0.2%. Dow Jones Industrial Average: 42,635.20, up 0.3% (107 points)