Ogee Arch

Ogee is a shape consisting of a concave arc flowing into a convex arc, so forming an S-shaped curve with vertical ends. The ogee curve is an analogue of a cyma curve, the difference being that a cyma has horizontal rather than vertical ends. An alternative name for ogee is cyma reversa. In geometry, concavity is a property of certain geometric figures, and in calculus, a property of certain graphs of functions. ... The term arc may refer to: A part of a circles circumference (also called a circle segment). ... In mathematics, an object is convex if for any pair of points within the object, any point on the straight line segment that joins them is also within the object. ...

In architecture, the ogee shape is one of the characteristics of the Gothic style, especially decorative elements in the 14th and 15th century late Gothic styles called Flamboyant in France and Decorated in England. Architecture (in Greek αρχή = first and τέχνη = craftsmanship) is the art and science of designing buildings and structures. ... Gothic architecture characterizes any of the styles of European architecture, particularly associated with cathedrals and other churches, in use throughout Europe during the high and late medieval period, from the 12th century onwards. ...

An ogee moulding, a molding of ogee profile framed between square sections is 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. Molding (US) or moulding (UK) can be: moulding or molding, a decorative feature used in interior design and architecture molding or moulding, a process used in manufacturing This is a disambiguation page — a navigational aid which lists other pages that might otherwise share the same title. ... Architects first real look at the Greek Ionic order: Julien David LeRoy, Les ruines plus beaux des monuments de la Grèce Paris, 1758 (Plate XX) The Ionic order forms one of the three orders or organizational systems of classical architecture, the other two canonic orders being the Doric and... The Corinthian order as used for the portico of the Pantheon, Rome provided a prominent model for Renaissance and later architects, through the medium of engravings. ... A large family of mouldings which are designed to gracefully flare out to a finished top edge; generally used for capping walls, pilasters, cabinets; used extensively in the creation of interior and exterior cornice assemblies and door and window hoods. ... A baseboard or skirting board is a wooden board, normally 75mm to 300mm deep, covering the lowest part of an interior wall. ... In architecture, a plinth is the lower mouldings of a podium, pedestal or skirting, or a block or slab upon which a column, pedestal, statue or vase is based. ...

To minimize erosion, the downstream face of a dam spillway is usually an ogee curve. Severe soil erosion in a wheat field near Washington State University, USA. Erosion is the displacement of solids (soil, mud, rock, and so forth) by the agents of wind, water, ice, movement in response to gravity, or living organisms (in the case of bioerosion). ... Scrivener Dam, Canberra Australia, was engineered to withstand a once-in-5000-years flood event A dam (a common Teutonic word, compare to Dutch dam, Swedish and German damm, and the Gothic verb faurdammjan, to block up) is a barrier across flowing water that obstructs, directs or retards the flow...

An ogee is also short for an ogee clock, 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. A pendulum clock uses a pendulum as its time base. ...

See also: ogive In ballistics or aerodynamics, an ogive is a pointed, curved surface used to form the approximately streamlined nose of a bullet, shell, missile or aircraft. ...