Ogee
From Wikipedia, the free encyclopedia
Ogee is a shape consisting of a concave arc flowing into a convex arc, so forming an S-shaped curve with vertical ends. In architecture, an alternative name for ogee is cyma reversa.
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[edit] Use in architecture
The cyma reversa form occurs in antiquity; for example, use is made in ancient Persia at the Tomb of Cyrus.[1] The cyma reversa is also evident in ancient Greek architecture.[2] The ogee shape is one of the characteristics of the Gothic style of architecture, especially decorative elements in the 14th and 15th century late Gothic styles called Flamboyant in France and Decorated in England. Ogee windows and arches were introduced to European cities from the Middle East. The ogee curve is an analogue of a "cyma curve", the difference being that a cyma has horizontal rather than vertical ends.
Decorative molding with the ogee profile, often framed between moldings with a square section. Part of the standard classical decorative vocabulary, adopted from architrave and cornice moldings of the Ionic order and Corinthian order. An ogee is part of the "crown molding" that is frequently used at the top of a piece of case furniture, or capping a baseboard or plinth or where a wall meets the ceiling. An ogee molding may be run in plaster or wood, or cut in stone or brickwork.
[edit] Ogee clock
An ]'Ogee clock' is a common kind of weight-driven 19th-century pendulum clock in a simplified Gothic taste, made in the United States for a mantelpiece or to sit upon a wall bracket. An ogee clock is rectangular, with ogee-profile molding that frames a central glass door that protects the clock face and the pendulum. The door usually carries a painted scene in the area beneath the face. Ogee clocks are one of the most commonly encountered varieties of American antique clocks.
[edit] Other meanings
In fluid mechanics, the term ogee is used for an aerodynamic curve due to the "oh, gee!" effect of physically navigating such a curve. For example, a wing may be shaped as an ogee curve, particularly on supersonic aircraft such as the Concorde. Also, the downstream face of a dam spillway is usually formed in an ogee curve to minimize water pressure.
In aesthetic facial surgery, the term is used to describe the malar or cheekbone prominence transitioning into the midcheek hollow. The aim of a mid-face rejuvenation is to restore the ogee curve and enhance the cheekbones. This enhancement is also commonly a part of a routine facelift.
Ogee is also a mathematical term, which means the same thing as inflection point.
An ogee is a style of sleeve, in particular on a gown; the term is not widely used, and may not be used at all outside the University of London.
[edit] Line notes
[edit] References
- William Bell Dinsmoor and William James Anderson (1973) The architecture of ancient Greece: an account of its historic development, Biblo & Tannen Publishers, 424 pages ISBN:0819602833
- C.Michael Hogan (2008) Tomb of Cyrus, The Megalithic Portal, ed. A. Burnham [http://www.megalithic.co.uk/article.php?sid=18264
