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Blowpipe (tool)
A blowpipe is one of several tools used to direct streams of gases into any of several working media. Blowpipes for torches If a stream or jet of air is directed through a flame, fuel air mixing is enhanced and the jet exiting the flame is intensely hot. Jewelers and glassblowers engaged in lampwork have used the blowpipe since ancient times, with the blast being powered by the user's lungs. For small work, a mouth-blown blowpipe may be used with a candle flame or an alcohol lamp, with established techniques for applying oxidizing and reducing flames to the workpiece or specimen. Starting in the late 18th Century, blowpipes have been powered by mechanisms, initially bladders and bellows, but now blowers, compressors and compressed gas cylinders are commonplace. While blowing air is effective, blowing oxygen produces higher temperatures, and it is also practical to invert the roles of the gasses and blow fuel through air. Contemporary blowtorches and oxy-fuel welding and cu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Blowpipe2 (PSF)
Blowpipe may refer to: * Blowpipe (missile), a man-portable surface-to-air missile * Blowgun (also called a blowpipe or blow tube) is a simple weapon in which a missile, such as a dart, is blown through a pipe * Blowpipe (tool), used to direct streams of gases into any of several working media * Blowpipe (Transformers), Blowpipe (''Transformers''), several ''Transformers'' characters {{disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
English Language
English is a West Germanic language that developed in early medieval England and has since become a English as a lingua franca, global lingua franca. The namesake of the language is the Angles (tribe), Angles, one of the Germanic peoples that Anglo-Saxon settlement of Britain, migrated to Britain after its End of Roman rule in Britain, Roman occupiers left. English is the list of languages by total number of speakers, most spoken language in the world, primarily due to the global influences of the former British Empire (succeeded by the Commonwealth of Nations) and the United States. English is the list of languages by number of native speakers, third-most spoken native language, after Mandarin Chinese and Spanish language, Spanish; it is also the most widely learned second language in the world, with more second-language speakers than native speakers. English is either the official language or one of the official languages in list of countries and territories where English ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glassblowing
Glassblowing is a glassforming technique that involves inflating molten glass into a bubble (or parison) with the aid of a blowpipe (or blow tube). A person who blows glass is called a ''glassblower'', ''glassmith'', or ''gaffer''. A '' lampworker'' (often also called a glassblower or glassworker) manipulates glass with the use of a torch on a smaller scale, such as in producing precision laboratory glassware out of borosilicate glass. Technology Principles As a novel glass forming technique created in the middle of the 1st century BC, glassblowing exploited a working property of glass that was previously unknown to glassworkers; inflation, which is the expansion of a molten blob of glass by introducing a small amount of air into it. That is based on the liquid structure of glass where the atoms are held together by strong chemical bonds in a disordered and random network,Frank, S 1982. Glass and Archaeology. Academic Press: London. Freestone, I. (1991). "Looking into Glass". ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bude Light
A Bude-Light was a very bright oil lamp (later, in its modified form, a gas lamp) invented by Sir Goldsworthy Gurney, patented by him on 8 June 1839 and named after Bude, Cornwall, where he lived. History Lighthouse experiments As first developed, the light worked by introducing pure oxygen into the centre of an Argand burner. It was claimed to be a cheap way of producing a bright light: the unburned carbon in the oil flame burned incredibly brightly and an intense, white light was produced from the weak yellow flame of the oil lamp. In 1838, Gurney reported the results of his initial tests to Michael Faraday, who recommended the proposal to Trinity House for possible use in lighthouses. It was trialled on an experimental basis in Orford Low Lighthouse in 1839, where its flame was observed to be 2.5 times as powerful as a flame of the same size on a conventional oil lamp; its use in lighthouses was not pursued, however, due to high running costs. Houses of Parliament The ch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Goldsworthy Gurney
Sir Goldsworthy Gurney (14 February 1793 – 28 February 1875) was a British surgeon, chemist, architect, Construction, builder, lecturer and consultant. He was a prototypical British gentleman scientist and inventor of the Victorian era. Amongst many accomplishments, he developed the oxy-hydrogen Blowpipe (tool), blowpipe, and later applied its principles to a novel form of illumination, the Bude-Light; developed a series of early steam-powered road vehicles; and laid claim—still discussed and disputed today—to the blastpipe, a key component in the success of steam locomotives, engines, and other coal-fired systems. Events surrounding the failure of his steam vehicle enterprise gave rise to controversy in his time, with considerable polarisation of opinion. His daughter Anna Jane Gurney (1816–1895) was devoted to him. During her lifetime, she engaged in a campaign to ensure the blastpipe was seen as his invention. Biography Gurney was born in St Merryn, Cornwall, Engla ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Robert Hare (chemist)
Robert Hare (January 17, 1781 – May 15, 1858) was an early American chemist and professor. Biography Hare was born in Philadelphia, Pennsylvania, on January 17, 1781. He developed and experimented with the oxy-hydrogen blowpipe, with Edward Daniel Clarke of Oxford, shortly after 1800. He married Harriett Clark and had six children. In 1802, Hare was elected a member of the American Philosophical Society. He was a professor at the University of Pennsylvania between 1810 and 1812 and between 1818 and 1847. By the 1820s, Hare had developed the "galvanic deflagrator", a type of voltaic battery having large plates used for producing rapid and powerful combustion.Kneeland, Timothy W. (2008). ''Robert Hare: Politics, Science, and Spiritualism in the Early Republic''. The Pennsylvania Magazine of History and Biography. Vol. 132, No. 3. pp. 245-260. He was elected an Associate Fellow of the American Academy of Arts and Sciences in 1824. Hare died in Philadelphia on May 15, 1858. Spi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Assay
An assay is an investigative (analytic) procedure in laboratory medicine, mining, pharmacology, environmental biology and molecular biology for qualitatively assessing or quantitatively measuring the presence, amount, or functional activity of a target entity. The measured entity is often called the analyte, the measurand, or the target of the assay. The analyte can be a drug, biochemical substance, chemical element or compound, or cell in an organism or organic sample. An assay usually aims to measure an analyte's intensive property and express it in the relevant measurement unit (e.g. molarity, density, functional activity in enzyme international units, degree of effect in comparison to a standard, etc.). If the assay involves exogenous reactants (the reagents), then their quantities are kept fixed (or in excess) so that the quantity and quality of the target are the only limiting factors. The difference in the assay outcome is used to deduce the unknown quality ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oxy-hydrogen
Oxyhydrogen is a mixture of hydrogen (H2) and oxygen (O2) gases. This gaseous mixture is used for torches to process refractory materials and was the first gaseous mixture used for welding. Theoretically, a ratio of 2:1 hydrogen:oxygen is enough to achieve maximum efficiency; in practice a ratio 4:1 or 5:1 is needed to avoid an oxidizing flame. This mixture may also be referred to as ' (Scandinavian and German '; ), although some authors define knallgas to be a generic term for the mixture of fuel with the precise amount of oxygen required for complete combustion, thus 2:1 oxyhydrogen would be called "hydrogen-knallgas". "Brown's gas" and HHO are terms for oxyhydrogen originating in pseudoscience, although is preferred due to meaning . Properties Oxyhydrogen will combust when brought to its autoignition temperature. For the stoichiometric mixture in air, at normal atmospheric pressure, autoignition occurs at about 570 °C (1065 °F). The minimum energy require ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydrogen
Hydrogen is a chemical element; it has chemical symbol, symbol H and atomic number 1. It is the lightest and abundance of the chemical elements, most abundant chemical element in the universe, constituting about 75% of all baryon, normal matter. Under standard conditions, hydrogen is a gas of diatomic molecules with the chemical formula, formula , called dihydrogen, or sometimes hydrogen gas, molecular hydrogen, or simply hydrogen. Dihydrogen is colorless, odorless, non-toxic, and highly combustible. Stars, including the Sun, mainly consist of hydrogen in a plasma state, while on Earth, hydrogen is found as the gas (dihydrogen) and in molecular forms, such as in water and organic compounds. The most common isotope of hydrogen (H) consists of one proton, one electron, and no neutrons. Hydrogen gas was first produced artificially in the 17th century by the reaction of acids with metals. Henry Cavendish, in 1766–1781, identified hydrogen gas as a distinct substance and discovere ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Edward Daniel Clarke
Edward Daniel Clarke (5 June 17699 March 1822) was an English clergyman, naturalist, mineralogist, and traveller. Life Edward Daniel Clarke was born at Willingdon, Sussex, and educated first at Uckfield School"Anthony Saunders, D.D." in Mark Antony Lower, ''The Worthies of Sussex'' (1865), p. 63: "In fact, Uckfield school enjoyed considerable celebrity. During the mastership of the Rev. Robert Gerison, Dr. James Stanier Clarke, and his brother Edward Daniel Clarke, the well-known traveller, received their rudimentary education there..." and then at Tonbridge. In 1786 he obtained the office of chapel clerk at Jesus College, Cambridge, but the loss of his father at this time involved him in difficulties. In 1790 he took his degree, and soon after became private tutor to Henry Tufton, nephew of the Duke of Dorset. In 1792 he obtained an engagement to travel with Lord Berwick through Germany, Switzerland and Italy. After crossing the Alps, and visiting a few of the principal c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oxygen
Oxygen is a chemical element; it has chemical symbol, symbol O and atomic number 8. It is a member of the chalcogen group (periodic table), group in the periodic table, a highly reactivity (chemistry), reactive nonmetal (chemistry), nonmetal, and a potent oxidizing agent that readily forms oxides with most elements as well as with other chemical compound, compounds. Oxygen is abundance of elements in Earth's crust, the most abundant element in Earth's crust, making up almost half of the Earth's crust in the form of various oxides such as water, carbon dioxide, iron oxides and silicates.Atkins, P.; Jones, L.; Laverman, L. (2016).''Chemical Principles'', 7th edition. Freeman. It is abundance of chemical elements, the third-most abundant element in the universe after hydrogen and helium. At standard temperature and pressure, two oxygen atoms will chemical bond, bind covalent bond, covalently to form dioxygen, a colorless and odorless diatomic gas with the chemical formula ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Antoine Lavoisier
Antoine-Laurent de Lavoisier ( ; ; 26 August 17438 May 1794), When reduced without charcoal, it gave off an air which supported respiration and combustion in an enhanced way. He concluded that this was just a pure form of common air and that it was the air itself "undivided, without alteration, without decomposition" which combined with metals on calcination. After returning from Paris, Priestley took up once again his investigation of the air from mercury calx. His results now showed that this air was not just an especially pure form of common air but was "five or six times better than common air, for the purpose of respiration, inflammation, and ... every other use of common air". He called the air dephlogisticated air, as he thought it was common air deprived of its phlogiston. Since it was therefore in a state to absorb a much greater quantity of phlogiston given off by burning bodies and respiring animals, the greatly enhanced combustion of substances and the greater ease ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
