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Flat Glass
Plate glass, flat glass or sheet glass is a type of glass, initially produced in plane form, commonly used for windows, glass doors, transparent walls, and windscreens. For modern architectural and automotive applications, the flat glass is sometimes bent after production of the plane sheet. Flat glass stands in contrast to ''container glass'' (used for bottles, jars, cups) and ''glass fibre'' (used for thermal insulation, in fibreglass composites, and for optical communication). Flat glass has a higher magnesium oxide and sodium oxide content than container glass, and a lower silica, calcium oxide, and aluminium oxide content."High temperature glass melt property database for process modeling"; Eds.: Thomas P. Seward III and Terese Vascott; The American Ceramic Society, Westerville, Ohio, 2005, From the lower soluble oxide content comes the better chemical durability of container glass against water, which is required especially for storage of beverages and food. Most fl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Relaxation In Tel Aviv Hotel By David Shankbone
Relaxation stands quite generally for a release of tension, a return to equilibrium. In the sciences, the term is used in the following ways: * Relaxation (physics), and more in particular: ** Relaxation (NMR), processes by which nuclear magnetization returns to the equilibrium distribution ** Dielectric relaxation, the delay in the dielectric constant of a material ** Vibrational energy relaxation, the process by which molecules in high energy quantum states return to the Maxwell-Boltzmann distribution ** Chemical relaxation methods, related to temperature jump ** Relaxation oscillator, a type of electronic oscillator In mathematics: :* Relaxation (approximation), a technique for transforming hard constraints into easier ones :* Relaxation (iterative method), a technique for the numerical solution of equations :* Relaxation (extension method), a technique for a natural extension in mathematical optimization or variational problems In computer science: :* Relaxation (computing), ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Broad Sheet
Broad sheet is a type of hand-blown glass. It was first made in Sussex in 1226. Production It is made by blowing molten glass into an elongated tube shape with a blowpipe. Then, while the glass is still hot, the ends are cut off and the resulting cylinder is split with shears and flattened on an iron plate. The quality of broad sheet glass is not good, with many imperfections and mostly translucent. Due to the relatively small sizes blown, broad sheet was typically made into leadlights. The centerpiece was used for decoration in places where looking through the glass wasn't vital. If the piece was large, it was possible to see bubble tracks and strain lines. Other methods for making hand-blown glass included blown plate glass, crown glass (introduced to England in the 17th century), polished plate glass and cylinder blown sheet glass. These methods of manufacture lasted at least until the end of the 19th century. The early 20th century marks the move away from hand-blown to m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Red Brick Universities
A red brick university (or redbrick university) was originally one of the nine civic universities founded in the major industrial cities of England in the 19th century. However, with the 1960s proliferation of plate glass universities and the reclassification of polytechnics in the Further and Higher Education Act 1992 as post-1992 universities, all British universities founded in the late 19th and early 20th centuries in major cities are now sometimes referred to as "red brick". Six of the original redbrick institutions, or their predecessor institutes, gained university status before World War I and were initially established as civic science or engineering colleges. Eight of the nine original institutions are members of the Russell Group. Origins of the term and use The term ''red brick'' or ''redbrick'' was coined by Edgar Allison Peers, a professor of Spanish at the University of Liverpool, to describe the civic universities, while using the pseudonym "Bruce Truscot" ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United Kingdom
The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Europe, off the north-western coast of the continental mainland. It comprises England, Scotland, Wales and Northern Ireland. The United Kingdom includes the island of Great Britain, the north-eastern part of the island of Ireland, and many smaller islands within the British Isles. Northern Ireland shares a land border with the Republic of Ireland; otherwise, the United Kingdom is surrounded by the Atlantic Ocean, the North Sea, the English Channel, the Celtic Sea and the Irish Sea. The total area of the United Kingdom is , with an estimated 2020 population of more than 67 million people. The United Kingdom has evolved from a series of annexations, unions and separations of constituent countries over several hundred years. The Treaty of Union between the Kingdom of England (which included Wales, annexed in 1542) and the Kingdom of Scotland in 170 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plate Glass Universities
The term plate glass university or plateglass university refers to a group of universities in the United Kingdom established or promoted to university status in the 1960s. The original plate glass universities were established following decisions by the University Grants Committee (UGC) in the late 1950s and early 1960s, prior to the Robbins Report in 1963. However, the term has since expanded to encompass the institutions that became universities as a result of Robbins' recommendations. Origin of terminology The term ''plateglass'' was coined by Michael Beloff for a book he wrote about these universities, to reflect their modern architectural design which often contains wide expanses of plate glass in steel or concrete frames. This contrasted with the (largely Victorian) red brick universities and the very much older ancient universities. Beloff applied the term specifically to the new creations of the 1960s, not including the institutions promoted from university colleg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Overflow Downdraw Method
The overflow downdraw method or fusion method is a technique for producing ''flat glass''. The key advantage of this technique as compared to the float glass process is that the pristine surfaces are not touched by molten tin. The technique is used for the production of very thin flat panel display glass by the companies Asahi Glass Co., Corning, Nippon Electric Glass, Samsung Corning Precision Materials The Samsung Group (or simply Samsung) ( ko, 삼성 ) is a South Korean multinational manufacturing conglomerate headquartered in Samsung Town, Seoul, South Korea. It comprises numerous affiliated businesses, most of them united under the ..., and various other companies operating in the field of display glass and other types of thin glass. The fusion method was originally conceived by Corning in the 1960s as a method for manufacturing automotive windshields. Shelved for years, the technology was reintroduced to supply the flat screen display market. A sheet of gla ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Float Glass
Float glass is a sheet of glass made by floating molten glass on a bed of molten metal, typically tin, although lead and other various low- melting-point alloys were used in the past. This method gives the sheet uniform thickness and very flat surfaces. Modern windows are made from float glass. Most float glass is soda-lime glass, although relatively minor quantities of specialty borosilicate and flat panel display glass are also produced using the float glass process. The float glass process is also known as the Pilkington process, named after the British glass manufacturer Pilkington, which pioneered the technique in the 1950s at their production site in St Helens, Merseyside. History Until the 16th century, window glass or other flat glass was generally cut from large discs (or rondels) of crown glass. Larger sheets of glass were made by blowing large cylinders which were cut open and flattened, then cut into panes. Most window glass in the early 19th century was made usin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fourcault Process
The Fourcault process is a method of manufacturing plate glass. First developed in Belgium by (1862–1919) during the early 1900s, the process was used globally. Fourcault is an example of a "vertical draw" process, in that the glass is drawn against gravity in an upward direction. Gravity forces influence parts of the process. Process The Fourcault process requires a "pit" or drawing area and an assembly of machines to draw up the ribbon of glass while performing actions upon it that ensure desired quality and process yields. Today most glass manufacture has a "hot end" where the products are made. Fourcault is no exception. The action in Fourcault happens "at the draw", or area where the glass is taken from a liquid state into the start of the process needed to make it into flat glass. At the bottom of the draw is the "pit" or place where the molten glass is sufficiently cooled to be close to forming temperature. The cooling process uses a device known as a "canal". As th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Architectural Glass
Architectural glass is glass that is used as a building material. It is most typically used as transparent glazing material in the building envelope, including windows in the external walls. Glass is also used for internal partitions and as an architectural feature. When used in buildings, glass is often of a safety type, which include reinforced, toughened and laminated glasses. History Timeline of modern architectural glass development * 1226: "Broad Sheet" first produced in Sussex. * 1330: " Crown glass" for art work and vessels first produced in Rouen, France. "Broad Sheet" also produced. Both were also supplied for export. * 1500s: A method of making mirrors out of plate glass was developed by Venetian glassmakers on the island of Murano, who covered the back of the glass with a mercury-tin amalgam, obtaining near-perfect and undistorted reflection. * 1620s: "Blown plate" first produced in London. Used for mirrors and coach plates. * 1678: " Crown glass" first produced in L ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Machine Drawn Cylinder Sheet
Machine drawn cylinder sheet was the first mechanical method for "drawing" window glass. Cylinders of glass 40 feet (12 m) high are drawn vertically from a circular tank. The glass is then annealed and cut into 7 to 10 foot (2 to 3 m) cylinders. These are cut lengthways, reheated, and flattened. This process was invented in the USA in 1903. This type of glass was manufactured in the early 20th century (it was manufactured in the United Kingdom by Pilkingtons from 1910 to 1933). Other historical methods for making window glass included broad sheet, blown plate, crown glass, polished plate and cylinder blown sheet. These methods of manufacture lasted at least until the end of the 19th century. The early 20th century marks the move away from hand-blown to machine manufactured glass such as rolled plate, flat drawn sheet, single and twin ground polished plate and float glass Float glass is a sheet of glass made by floating molten glass on a bed of molten metal, typ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cylinder Blown Sheet
Cylinder blown sheet is a type of hand- blown window glass. It is created with a similar process to broad sheet, but with the use of larger cylinders. In this manufacturing process glass is blown into a cylindrical iron mold. The ends are cut off and a cut is made down the side of the cylinder. The cut cylinder is then placed in an oven where the cylinder unrolls into a flat glass sheet. William J. Blenko used this method in the early 1900s to make stained glass. The result is much larger panes and improved surface quality over broad sheet, although still containing some imperfections. These imperfect panes have led to the misconception that glass is actually a high-viscosity fluid at room temperature, which is not the case. This method caused surface damages on the glass due to the flattening and moving, and the sheet therefore had to be ground and polished. In 1839 the Chance Brothers invented the patent plate process where the glass plate was placed on a wet piece of leather and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polished Plate
Polished plate is a type of hand-made glass. It is produced by casting glass onto a table and then subsequently grinding and polishing the glass. This was originally done by hand, and then later by machine. It was an expensive process requiring a large capital investment. Other methods of producing hand-blown window glass included: broad sheet, blown plate, crown glass and cylinder blown sheet. These methods of manufacture lasted at least until the end of the 19th century. The early 20th century marks the move away from hand-blown to machine manufactured glass such as rolled plate, machine drawn cylinder sheet, flat drawn sheet, single and twin ground polished plate, and float glass. The Frenchman, Louis Lucas de Nehou, in 1688, in conjunction with Abraham Thevart, succeeded in perfecting the process of casting plate-glass. Mirror plates previous to the invention had been made from blown "sheet" glass, and were consequently very limited in size. De Nehou's process of rolling molte ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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