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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. Yale (company) - Wikipedia

   en.wikipedia.org/wiki/Yale_(company)

   By 1929, Yale & Towne became the largest locks and door closer manufacturer in the world, and established an exclusive showroom for its products in the newly built Chrysler Building in New York. [10] During World War I , like number of manufacturers, Yale became involved in arms production . [ 10 ]

4. 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.

5. Bandsaw - Wikipedia

   en.wikipedia.org/wiki/Bandsaw

   Pivot saws hinge in an arc as they advance through the work. Single column saws have a large diameter column that the entire saw rides up and down on, very similar to a drill press. Dual column saws have a pair of large columns, one on either side of the work, for very high rigidity and precision. The dual column setup is unable to make use of ...

6. Hinge - Wikipedia

   en.wikipedia.org/wiki/Hinge

   An ornate brass door hinge A barrel hinge. A hinge is a mechanical bearing that connects two solid objects, typically allowing only a limited angle of rotation between them. Two objects connected by an ideal hinge rotate relative to each other about a fixed axis of rotation, with all other translations or rotations prevented; thus a hinge has one degree of freedom.

7. Garage door opener - Wikipedia

   en.wikipedia.org/wiki/Garage_door_opener

   The electric overhead garage door opener was invented by C.G. Johnson in 1926 in Hartford City, Indiana. [1] Electric Garage Door openers did not become popular until Era Meter Company of Chicago offered one after World War II where the overhead garage door could be opened via a key pad located on a post at the end of the driveway or a switch inside the garage.