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Woolrich Electrical Generator
The Woolrich Electrical Generator, now in Thinktank, Birmingham Science Museum, England, is the earliest electrical generator used in an industrial process. Built in February 1844 at the Magneto Works of Thomas Prime and Son, Birmingham, to a design by John Stephen Woolrich (1820–1850), it was used by the firm of Elkingtons for commercial electroplating. Plaque The generator stood for some time in the chapel of Aston Hall, accompanied by a plaque bearing the following inscription: Construction The generator in its surviving form consists of 8 axial bobbins with a magnetic field applied by 4 iron horseshoe magnets. The rectangular frame was made of wood and measured 5 foot 4 inches tall, 6 feet wide, and 2 feet long. The generator was fitted with a commutator as electroplating requires direct current. John Stephen Woolrich The generator's designer, John Stephen Woolrich, was born in Lichfield, England in late 1820. The second son of John Woolrich (c.1791–1843) and his w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thinktank, Birmingham
Thinktank, Birmingham (formerly known as simply Thinktank) is a science museum in Birmingham, England. Opened in 2001, it is part of Birmingham Museums Trust and is located within the Millennium Point complex on Curzon Street, Digbeth. History The Birmingham Collection of Science & Industry was started in the mid-19th century, initially consisting of collections of weapons from the gun trade and the Birmingham Proof House. The Birmingham Museum & Art Gallery opened in 1885, including science collections. In 1951 the Museum of Science and Industry opened at Elkington Silver Electroplating Works, Newhall Street. Over the following years, the museum acquired individual artefacts, as well as entire collections, that were related to local industry and the history of science and technology. Birmingham City Council decided in 1995 to relocate the museum when it was given an opportunity by the Millennium Commission to construct a new building. The former museum closed in 1997, an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ladywood
Ladywood is an inner-city district next to central Birmingham. Historically in Warwickshire, in June 2004, Birmingham City Council conducted a citywide "Ward Boundary Revision" to round-up the thirty-nine Birmingham wards to forty. As a result of this, Ladywood Ward's boundaries were expanded to include the neighbouring areas of Hockley, West Midlands, Hockley, Lee Bank and Birmingham city centre. Demographics At the time of the United Kingdom Census 2001, 2001 Population Census, 23,789 people were living in the Ladywood Ward. The population density was 3,330 people per km2 living within its 7.1 km2 boundary, compared with 3,649 people per km2 for Birmingham. Nearly half of the population of Ladywood (49%) consisted of ethnic minorities compared with 29.6% for Birmingham in general. The largest ethnic minority groups were British African-Caribbean community, Afro-Caribbean at 13.18%, Non-resident Indian and person of Indian origin, Indian at 11.65%, Pakistani diaspora, Pak ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electrical Generators
In electricity generation, a generator is a device that converts motive power (mechanical energy) or fuel-based power ( chemical energy) into electric power for use in an external circuit. Sources of mechanical energy include steam turbines, gas turbines, water turbines, internal combustion engines, wind turbines and even hand cranks. The first electromagnetic generator, the Faraday disk, was invented in 1831 by British scientist Michael Faraday. Generators provide nearly all of the power for electric power grids. In addition to electromechanical designs, photovoltaic and fuel cell powered generators utilize solar power and hydrogen-based fuels, respectively, to generate electrical output. The reverse conversion of electrical energy into mechanical energy is done by an electric motor, and motors and generators have many similarities. Many motors can be mechanically driven to generate electricity; frequently they make acceptable manual generators. Terminology Electromagn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Faraday's Law Of Induction
Faraday's law of induction (briefly, Faraday's law) is a basic law of electromagnetism predicting how a magnetic field will interact with an electric circuit to produce an electromotive force (emf)—a phenomenon known as electromagnetic induction. It is the fundamental operating principle of transformers, inductors, and many types of electrical motors, generators and solenoids. The Maxwell–Faraday equation (listed as one of Maxwell's equations) describes the fact that a spatially varying (and also possibly time-varying, depending on how a magnetic field varies in time) electric field always accompanies a time-varying magnetic field, while Faraday's law states that there is emf (electromotive force, defined as electromagnetic work done on a unit charge when it has traveled one round of a conductive loop) on the conductive loop when the magnetic flux through the surface enclosed by the loop varies in time. Faraday's law had been discovered and one aspect of it (transformer emf ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electromagnetic Induction
Electromagnetic or magnetic induction is the production of an electromotive force (emf) across an electrical conductor in a changing magnetic field. Michael Faraday is generally credited with the discovery of induction in 1831, and James Clerk Maxwell mathematically described it as Faraday's law of induction. Lenz's law describes the direction of the induced field. Faraday's law was later generalized to become the Maxwell–Faraday equation, one of the four Maxwell equations in his theory of electromagnetism. Electromagnetic induction has found many applications, including electrical components such as inductors and transformers, and devices such as electric motors and generators. History Electromagnetic induction was discovered by Michael Faraday, published in 1831. It was discovered independently by Joseph Henry in 1832. In Faraday's first experimental demonstration (August 29, 1831), he wrapped two wires around opposite sides of an iron ring or "torus" (an arrangement ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dynamo
file:DynamoElectricMachinesEndViewPartlySection USP284110.png, "Dynamo Electric Machine" (end view, partly section, ) A dynamo is an electrical generator that creates direct current using a commutator (electric), commutator. Dynamos were the first electrical generators capable of delivering power for industry, and the foundation upon which many other later Electric power conversion, electric-power conversion devices were based, including the electric motor, the Alternating current, alternating-current alternator, and the rotary converter. Today, the simpler alternator dominates large scale Electricity generation, power generation, for efficiency, reliability and cost reasons. A dynamo has the disadvantages of a commutator (electric), mechanical commutator. Also, converting alternating to direct current using rectifiers (such as vacuum tubes or more recently via Solid state (electronics), solid state technology) is effective and usually economical. History Induction with pe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Annual Register
''The Annual Register'' (originally subtitled "A View of the History, Politicks and Literature of the Year ...") is a long-established reference work, written and published each year, which records and analyses the year's major events, developments and trends throughout the world. It was first written in 1758 under the editorship of Edmund Burke, and has been produced continuously since that date. In its current form the first half of the book comprises articles on each of the world's countries or regions, while the latter half contains articles on international organisations, economics, the environment, science, law, religion, the arts and sport, together with obituaries, a chronicle of major events and selected documents. In addition to being produced annually in hardback, the book is also published electronically, and its entire 260-year archive is available online from its publisher, ProQuest. Edmund Burke and the creation of ''The Annual Register'' ''The Annual Register'' wa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lead Carbonate
Lead(II) carbonate is the chemical compound with the chemical formula . It is a white solid with several practical uses, despite its toxicity. It occurs naturally as the mineral cerussite. Structure Like all metal carbonates, lead(II) carbonate adopts a dense, highly crosslinked structure consisting of intact and metal cation sites. As verified by X-ray crystallography, the Pb(II) centers are seven-coordinate, being surrounded by multiple carbonate ligands. The carbonate centers are bonded to bidentate to a single Pb and bridge to five other Pb sites. Production and use Lead carbonate is manufactured by passing carbon dioxide into a cold dilute solution of lead(II) acetate, or by shaking a suspension of a lead salt more soluble than the carbonate with ammonium carbonate at a low temperature to avoid formation of basic lead carbonate. : Lead carbonate is used as a catalyst to polymerize formaldehyde to poly(oxymethylene). It improves the bonding of chloroprene to wire. Regulat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mechanics Magazine
Joseph Clinton Robertson (c.1787–1852), pseudonym Sholto Percy, was a Scottish patent agent, writer and periodical editor. He was a political radical prominent in the early days of the working-class press in London, and in the debates within the Mechanics Institute movement. Early life He was born about 1787, the son of Rev. Joseph Robertson and Isobel Mathieson of Stewarton, Scotland. Rev. Joseph Robertson was Minister of Leith Wynd Chapel, Edinburgh, Scotland, but banished from Scotland for performing illegal marriages. ''The Mechanics' Magazine'' Robertson founded ''The Mechanics' Magazine'' in 1823, and edited and largely wrote it until the year of his death. It was a low-priced scientific weekly, and the first publication of its kind. To begin with he was in close alliance with Thomas Hodgskin: they had met in Edinburgh. It took advantage of a stamp tax exemption for technical weeklies not dealing in news. Robertson also devised a way of generating cheap content by an ea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Barium Carbonate
Barium carbonate is the inorganic compound with the formula BaCO3. Like most alkaline earth metal carbonates, it is a white salt that is poorly soluble in water. It occurs as the mineral known as witherite. In a commercial sense, it is one of the most important barium compounds. Preparation Barium carbonate is made commercially from barium sulfide by treatment with sodium carbonate at 60 to 70 °C (soda ash method) or, more commonly carbon dioxide at 40 to 90 °C: In the soda ash process, an aqueous solution of barium sulfide is treated with sodium carbonate: :BaS + H2O + CO2 → BaCO3 + H2S Reactions Barium carbonate reacts with acids such as hydrochloric acid to form soluble barium salts, such as barium chloride: : + 2 HCl → + + Pyrolysis of barium carbonate gives barium oxide. Uses It is mainly used to remove sulfate impurities from feedstock of the chlor-alkali process. Otherwise it is a common precursor to barium-containing compounds such as ferrites. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thomas Thomson (chemist)
Thomas Thomson MD (12 April 1773 – 2 August 1852) was a Scottish chemist and mineralogist whose writings contributed to the early spread of Dalton's atomic theory. His scientific accomplishments include the invention of the saccharometer and he gave silicon its current name. He served as president of the Philosophical Society of Glasgow. Thomson was the father of the botanist Thomas Thomson, and the uncle and father-in-law of the Medical Officer of Health Robert Thomson. Life and work Thomas Thomson was born in Crieff in Perthshire, on 12 April 1773 the son of Elizabeth Ewan and John Thomson. He was educated at Crieff Parish School and Stirling Burgh School. He then studied for a general degree at the University of St Andrews to study in classics, mathematics, and natural philosophy from 1787 to 1790. He had a five year break then entered University of Edinburgh to study medicine in 1795, gaining his doctorate (MD) in 1799. During this latter period he was inspired by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Annals Of Philosophy
''Annals of Philosophy; or, Magazine of Chemistry, Mineralology, Mechanics, Natural History, Agriculture and the Arts'' was a learned journal founded in 1813 by the Scottish chemist Thomas Thomson. It shortly became a leader in its field of commercial scientific periodicals. Contributors included John George Children, Edward Daniel Clarke, Philip Crampton, Alexander Crichton, James Cumming, John Herapath, William George Horner, Thomas Dick Lauder, John Miers, Matthew Paul Moyle, Robert Porrett, James Thomson, and Charles Wheatstone. Thomson edited it until 1821, when he was succeeded in 1821 by Richard Phillips. The journal was bought by Richard Taylor in 1827, and closed down for the benefit of the ''Philosophical Magazine''. The ''Annals of Philosophy'' were issued monthly following a standard pattern. Often the first article was a biographical article (10 pages) on a living or recently deceased scientist. This was then followed by a series of extended pieces (5-10 p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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