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Tracery is an architectural device by which windows (or screens, panels, and vaults) are divided into sections of various proportions by stone bars or ribs of moulding. [1] Most commonly, it refers to the stonework elements that support the glass in a window.
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When crowning moulding at the entablature is of the cyma form, it is called a cymatium. [7] Dentils: Small blocks spaced evenly along the bottom edge of the cornice; Drip cap: Moulding placed over a door or window opening to prevent water from flowing under the siding or across the glass
The dimensions of the optical elements that can be moulded depend on the size of the moulding machine. The precision glass moulding process is not limited to small optics. For the right element geometry, it can enable economical production of aspheric lenses up to 60 mm in diameter and more than 20 mm thick. [5] General design recommendations ...
A compound crown molding built up out of several individual trim elements Decorative pilaster of natural cherry hardwood topped with crown molding Crown molding may be a complex build-up of multiple trim elements, in this case built-out slightly above a window with short 90-degree returns The relief on this short 90-degree return of crown molding was back-cut with a coping saw
Door chain. A door chain, security chain, or security door chain or chain door interviewer [1] consists of a small chain attached to the door frame, which attaches to a track on the door for security purposes. It is a type of lock that is often used along with other types of locks to secure a door. [2]
Compression molding is a method of molding in which the molding material, generally preheated, is first placed in an open, heated mold cavity. The mold is closed with a top force or plug member, pressure is applied to force the material into contact with all mold areas, while heat and pressure are maintained until the molding material has cured; this process is known as compression molding ...
Glass disease, also referred to as sick glass or glass illness, is a degradation process of glass that can result in weeping, crizzling, spalling, cracking and fragmentation. [ 1 ] [ 2 ] Glass disease is caused by an inherent instability in the chemical composition of the original glass formula. [ 3 ]