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1 Neilson, James Beaumont
SUBJECT AREA: Metallurgy[br]b. 22 June 1792 Shettleston, near Glasgow, Scotlandd. 18 January 1865 Queenshill, Kirkcudbright-shire, Scotland[br]Scottish inventor of hot blast in ironmaking.[br]After leaving school before the age of 14 Neilson followed his father in tending colliery-steam engines. He continued in this line while apprenticed to his elder brother and afterwards rose to engine-wright at Irvine colliery. That failed and Neilson obtained work as Foreman at the first gasworks to be set up in Glasgow. After five years he became Manager and Engineer to the works, remaining there for thirty years. He introduced a number of improvements into gas manufacture, such as the use of clay retorts, iron sulphate as a purifier and the swallow-tail burner. He had meanwhile benefited from studying physics and chemistry at the Andersonian University in Glasgow.Neilson is best known for introducing hot blast into ironmaking. At that time, ironmasters believed that cold blast produced the best results, since furnaces seemed to make more and better iron in the winter than the summer. Neilson found that by leading the air blast through an iron chamber heated by a coal fire beneath it, much less fuel was needed to convert the iron ore to iron. He secured a patent in 1828 and managed to persuade Clyde Ironworks in Glasgow to try out the device. The results were immediately favourable, and the use of hot blast spread rapidly throughout the country and abroad. The equipment was improved, raising the blast temperature to around 300°C (572°F), reducing the amount of coal, which was converted into coke, required to produce a tonne of iron from 10 tonnes to about 3. Neilson entered into a partnership with Charles Macintosh and others to patent and promote the process. Successive, and successful, lawsuits against those who infringed the patent demonstrates the general eagerness to adopt hot blast. Beneficial though it was, the process did not become really satisfactory until the introduction of hot-blast stoves by E.A. Cowper in 1857.[br]Principal Honours and DistinctionsFRS 1846.Further ReadingS.Smiles, Industrial Biography, Ch. 9 (offers the most detailed account of Neilson's life). Proc. Instn. Civ. Engrs., vol. 30, p. 451.J.Percy, 1851, Metallurgy: Iron and Steel (provides a detailed history of hot blast).W.K.V.Gale, 1969, Iron and Steel, London: Longmans (provides brief details).LRDBiographical history of technology > Neilson, James Beaumont
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2 FÆRA
* * *1.ð, [from fár, n., different from the following word, having á as root vowel], to slight, taunt one, with dat.; ok færa þeim eigi í orðum né verkum, offend them not in words nor acts, Hom. 57: mod., færa at e-m, id.2.ð, [i. e. fœra, a trans. verb formed from the pret. of fara, fór; not in Ulf.; A. S. fergan or ferjan; Engl. to ferry; Germ. führen; Dan. före; Swed. föra]:—to bring; a very freq. word, as the Germ. and Saxon ‘bring’ was unknown in the old Scandin., as in mod. Icel.; the Dan. bringe and Swed. bringa are mod. and borrowed from Germ.; færa fé til skips, Nj. 4; færa barn til skírnar, K. Þ. K. 2 passim; ef Þorvaldr væri færandi þangat, if Th. could be carried thither, Sturl. i. 157.2. to bring, present; hafði Þórólfr heim marga dýrgripi ok færði föður sínum ok móður, Eg. 4; þér munut f. mér höfuð hans, 86; færa e-m höfuð sitt, to surrender to one, Fms. x. 261; færa fórn, to bring offerings, Stj. passim; færa tak, to offer, give bail, Gþl. 122: the phrase, koma færandi hendi, to come with bringing hand, i. e. to bring gifts.3. phrases, færa ómaga á hendr e-m, of forced alimentation, Grág. Ó. Þ. passim; færa til þýfðar, to bring an action for theft, Grág. i. 429; færa e-t til sanns vegar, to make a thing right, assert the truth of it, 655 xxviii. 2; færa alla hluti til betra vegar, to turn all things to the best account; þat er gjörtæki, ok færir til meira máls, and leads to a more serious case, Grág. i. 429, v. l.; færa til bana, to put to death, Rb. 398; færa í hljóðmæli, to hush up, Nj. 51; færa í útlegð, to bring to outlawry, banish, Rb. 414; færa til Kristni, to bring to Christ, convert, Fms. xi. 408; færa sik í ætt, to vindicate one’s kinship (by a gallant deed), Sturl. ii. 197; er þú færðir þik með skörungskap í þína ætt, shewed thee to be worthy of thy friends, Glúm. 338.4. special usages; færa frá, to wean lambs in the spring, Vm. 13, hence frá-færur, q. v.; færa e-n af baki, to throw one, of a horse, Grág. ii. 95: færa niðr korn, sæði, to put down corn, seed, i. e. to sow, Nj. 169; tiu sáld niðr færð, Vm. 55; sálds sæði niðr fært, D. I. i. 476, Orkn. 462; færa e-n niðr, to keep one under, in swimming, Ld. 168; færa upp, to lift up, Nj. 19: færa upp, a cooking term, to take out the meat ( of the kettle), 247; færa í sundr, to split asunder, Grett. 151 (of logs); færa til, to adduce as a reason; færa við bakið (síðuna, etc.), to present the back (side, etc.) to a blow, Fms. vi. 15, Korm. 6; færa e-n fram, to maintain, feed, Grág. passim; færa fram, to utter, pronounce, Skálda 178; as a law term, to produce (færa fram sókn, vörn), Grág. passim; færa fé á vetr, to bring sheep to winter, i. e. keep them in fold, Grág. ch. 224; færa e-t á hendr e-m, to charge one with a thing, 656 A. 1. 3; færa skömm at e-m, to sneer at one, Eg. 210; færa á e-n, to mock one, Fms. v. 90, but see færa (from fár); færa e-t saman, to bring a thing about, Sturl. i. 139 C; færa kvæði, to deliver a poem, Ld. 114, Landn. 197, 199.5. to remove, change; færa kirkju, to remove a church, in rebuilding it, K. Þ. K. 38, cp. Eb. fine; færa bein, Bjarn. 19, Lat. translatio; færa mark, to change the mark on cattle, Grág. i. 416; færa landsmerki, to remove the landmarks, ii. 219: metaph., færa til rétts máls, to turn into plain language, viz. into prose, Edda 126; færa heimili sitt, to change one’s abode, Grág. i. 146; færa út búðarveggi, to enlarge the walls, Ísl. ii. 293.II. reflex. to bring, carry oneself; hann gat færsk þar at, he dragged himself thither, Fms. vi. 15; færask við, to strain, exert oneself, Eg. 233; færask í aukana, to strive with might and main, vide auki; færask at, to bestir oneself, Fms. vii. 243; mega ekki at færask, to be unable to do anything, 220, 265; svá hræddir, at þeir máttu ekki at f., so frightened that they could do nothing, 655 xxvii. 22; færask e-t ór fangi, to withhold from, vide fang; færask undan, to withhold; færa undan sökum, to plead not guilty, Fms. xi. 251; bera járn at færask undan, to carry iron (as an ordeal) in order to quit oneself, v. 307; færask á fætr, to grow up, Ld. 54; aldr færisk ( passes) e-n, one grows up, Fs. 3, Rb. 346; tvímælit færisk af, is removed, Lv. 52. -
3 Armstrong, Edwin Howard
[br]b. 18 December 1890 New York City, New York, USAd. 31 January 1954 New York City, New York, USA[br]American engineer who invented the regenerative and superheterodyne amplifiers and frequency modulation, all major contributions to radio communication and broadcasting.[br]Interested from childhood in anything mechanical, as a teenager Armstrong constructed a variety of wireless equipment in the attic of his parents' home, including spark-gap transmitters and receivers with iron-filing "coherer" detectors capable of producing weak Morse-code signals. In 1912, while still a student of engineering at Columbia University, he applied positive, i.e. regenerative, feedback to a Lee De Forest triode amplifier to just below the point of oscillation and obtained a gain of some 1,000 times, giving a receiver sensitivity very much greater than hitherto possible. Furthermore, by allowing the circuit to go into full oscillation he found he could generate stable continuous-waves, making possible the first reliable CW radio transmitter. Sadly, his claim to priority with this invention, for which he filed US patents in 1913, the year he graduated from Columbia, led to many years of litigation with De Forest, to whom the US Supreme Court finally, but unjustly, awarded the patent in 1934. The engineering world clearly did not agree with this decision, for the Institution of Radio Engineers did not revoke its previous award of a gold medal and he subsequently received the highest US scientific award, the Franklin Medal, for this discovery.During the First World War, after some time as an instructor at Columbia University, he joined the US Signal Corps laboratories in Paris, where in 1918 he invented the superheterodyne, a major contribution to radio-receiver design and for which he filed a patent in 1920. The principle of this circuit, which underlies virtually all modern radio, TV and radar reception, is that by using a local oscillator to convert, or "heterodyne", a wanted signal to a lower, fixed, "intermediate" frequency it is possible to obtain high amplification and selectivity without the need to "track" the tuning of numerous variable circuits.Returning to Columbia after the war and eventually becoming Professor of Electrical Engineering, he made a fortune from the sale of his patent rights and used part of his wealth to fund his own research into further problems in radio communication, particularly that of receiver noise. In 1933 he filed four patents covering the use of wide-band frequency modulation (FM) to achieve low-noise, high-fidelity sound broadcasting, but unable to interest RCA he eventually built a complete broadcast transmitter at his own expense in 1939 to prove the advantages of his system. Unfortunately, there followed another long battle to protect and exploit his patents, and exhausted and virtually ruined he took his own life in 1954, just as the use of FM became an established technique.[br]Principal Honours and DistinctionsInstitution of Radio Engineers Medal of Honour 1917. Franklin Medal 1937. IERE Edison Medal 1942. American Medal for Merit 1947.Bibliography1922, "Some recent developments in regenerative circuits", Proceedings of the Institute of Radio Engineers 10:244.1924, "The superheterodyne. Its origin, developments and some recent improvements", Proceedings of the Institute of Radio Engineers 12:549.1936, "A method of reducing disturbances in radio signalling by a system of frequency modulation", Proceedings of the Institute of Radio Engineers 24:689.Further ReadingL.Lessing, 1956, Man of High-Fidelity: Edwin Howard Armstrong, pbk 1969 (the only definitive biography).W.R.Maclaurin and R.J.Harman, 1949, Invention \& Innovation in the Radio Industry.J.R.Whitehead, 1950, Super-regenerative Receivers.A.N.Goldsmith, 1948, Frequency Modulation (for the background to the development of frequency modulation, in the form of a large collection of papers and an extensive bibliog raphy).KFBiographical history of technology > Armstrong, Edwin Howard
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