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HINGE
A hinge is a mechanical device that connects two solid objects, allowing rotation between them. Hinges may be made of flexible material or of moving components. In biology, many joints function as hinges.
Door hinges
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| Ancient pivot hinges, found in the dry stone buildings. |
There are many types of door hinge. Four main types include:
- Pivot Hinges which pivot in openings in the floor and the top of the door frame. Also referred to as a double-acting floor hinge. This type is found already in the ancient dry stone buildings.
- Butt/Mortise Hinges, usually in threes or fours, which are inset (mortised) into the door and frame. Most residential hinges in the U.S. are made of steel, although mortise hinges for outswing doors are often made of brass or stainless steel base to prevent corrosion.
- Continuous Hinges, which run the entire length of the door (also known as a "Piano Hinge")
- Concealed Hinges used for furniture doors (with or without self closing feature, with or without dampening systems) they are made of 2 parts, 1 part is the hinge cup and the arm, the other part is the mounting plate.
Other types include:
- Butterfly or Parliament (UK) Hinge
- Counterflap Hinge
- Flush Hinge
- Coach Hinge
- Rising Butt Hinge
- Double action spring hinge
- Tee Hinge
- Friction Hinge
- Security Hinge
- Cranked or 'Stormproof' Hinge
- Lift-off Hinges
Building access hinges
Since at least medieval times there have been hinges to drawbridges for defensive purposes for fortified buildings. Hinges are used in contemporary architecture where building settlement can be expected over the life of the building. For example, the Dakin Building, Brisbane, California was designed with its entrance ramp on a large hinge to allow settlement of the building built on piles over bay mud. This device has been effective.
See also
External links
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