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2. Hinge bender - Wikipedia

   en.wikipedia.org/wiki/Hinge_bender

   Hinge bender. A hinge bender, also called a hinge tweaker or hinge adjuster, is a hand tool for adjusting hinges, for instance on doors and windows on buildings or on cars.A hinge bender can be used to straighten a door that is tilted sideways relative to the door frame, which tends to happen gradually with most doors over a long time period.

3. Swing-door operator - Wikipedia

   en.wikipedia.org/wiki/Swing-door_operator

   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. In case of power failure while the door is open, the closer itself closes the door. Some are built without a door closer. The motor opens and closes the door through ...

4. Door closer - Wikipedia

   en.wikipedia.org/wiki/Door_closer

   Another type of surface mounted door closer is attached to the door frame behind the door (where the hinges are) next to the middle hinge. The "arm" (tail) rests against the door, and a spring that is twisted by the user opening the door closes the door by returning to its pre-twisted shape.

5. Sliding door operator - Wikipedia

   en.wikipedia.org/wiki/Sliding_door_operator

   The operator is placed in the space above the sliding door. An electric motor, geared down to get a lower speed and a higher torque, drives a pulley at one end of a belt. The door is clamped to the belt. To open the door, the motor turns the pulley, which in turn turns the belt, which in turn drags the door. To close the door, the reverse occurs.

6. Hinge - Wikipedia

   en.wikipedia.org/wiki/Hinge

   Doors with these hinges may be called haar-hung doors. Self-closing hinge This is a spring-loaded hinge with a speed control function. The same as spring hinge, usually use spring to provide force to close the door and provide a mechanical or hydraulic damper to control door close speed. That can prevent door slamming problem while auto closes ...

7. Selective door operation - Wikipedia

   en.wikipedia.org/wiki/Selective_door_operation

   Selective door operation is implemented at certain railway stations in the United States. In the New York City Subway, the 6 + 1 ⁄ 2-car-long platforms at 145th Street (and formerly the 5-car-long loop platforms at South Ferry) are too short to accommodate full-length trains of ten 51.4-foot-long (15.7 m) cars, so only the first five cars of the train opened their doors at these stations.

8. Hinge (app) - Wikipedia

   en.wikipedia.org/wiki/Hinge_(app)

   Throughout 2017, Hinge received more mentions than any other dating app in the "Weddings" section of The New York Times. [9] Hinge Matchmaker was released in September 2017, claiming to reinvent online dating for "people that missed out on the dating app craze". [10] Match Group made investments in Hinge as early as September 2017. [11]