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A building's surface detailing, inside and outside, often includes decorative moulding, and these often contain ogee-shaped profiles—consisting (from low to high) of a concave arc flowing into a convex arc, with vertical ends; if the lower curve is convex and higher one concave, this is known as a Roman ogee, although frequently the terms are used interchangeably and for a variety of other ...
A watch glass is a circular concave piece of glass used in chemistry as a surface to evaporate a liquid, to hold solids while being weighed, for heating a small amount of substance, and as a cover for a beaker. When used to cover beakers, the purpose is generally to prevent dust or other particles from entering the beaker; the watch glass does ...
The following is a list of American companies that produced, or currently produce clocks. Where known, the location of the company and the dates of clock manufacture follow the name. Samuel Abbott; Montpelier, Vermont (1830–1861) Ansonia Clock Company; Ansonia, Connecticut and Brooklyn, New York (1851–1929)
2. The gear trains used in clocks and watches have multiple stages of wheels and pinions in which the pinions have few leaves. Involute designs for these leaves would be undercut, making them too fragile and difficult to manufacture. 3. A large aspect of the design of watch and clock movements is the minimisation of friction.
The company established a library and its museum in 1813, which is the oldest specific collection of clocks and watches worldwide. [2] This is administered by the company's affiliated charity, the Clockmakers' Charity, [ 3 ] and is presently housed on the second floor of London's Science Museum .
Bead moulding: Narrow, half-round convex moulding, when repeated forms reeding; Beading or bead: Moulding in the form of a row of half spherical beads, larger than pearling. Other forms: Bead and leaf, bead and reel, bead and spindle; Beak: Small fillet moulding left on the edge of a larmier, which forms a canal, and makes a kind of pendant. [1]
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