-
1 a notable advance
Математика: значительные успехи (in) -
2 Ilgner, Karl
SUBJECT AREA: Electricity[br]b. 27 July 1862 Neisse, Upper Silesia (now Nysa, Poland)d. 18 January 1921 Berthelsdorf, Silesia[br]German electrical engineer, inventor of a transformer for electromotors.[br]Ilgner graduated from the Gewerbeakademie (the forerunner of the Technical University) in Berlin. As the representative of an electric manufacturing company in Breslau (now Wroclaw, Poland) from 1897, he was confronted with the fact that there were no appropriate drives for hoisting-engines or rolling-plants in steelworks. Two problems prevented the use of high-capacity electric motors in the mining as well as in the iron and steel industry: the reactions of the motors on the circuit at the peak point of stress concentration; and the complicated handling of the control system which raised the risks regarding safety. Having previously been head of the department of electrical power transmission in Hannover, he was concerned with the development of low-speed direct-current motors powered by gas engines.It was Harry Ward Leonard's switchgear for direct-current motors (USA, 1891) that permitted sudden and exact changes in the speed and direction of rotation without causing power loss, as demonstrated in the driving of a rolling sidewalk at the Paris World Fair of 1900. Ilgner connected this switchgear to a large and heavy flywheel which accumulated the kinetic energy from the circuit in order to compensate shock loads. With this combination, electric motors did not need special circuits, which were still weak, because they were working continuously and were regulated individually, so that they could be used for driving hoisting-engines in mines, rolling-plants in steelworks or machinery for producing tools and paper. Ilgner thus made a notable advance in the general progress of electrification.His transformer for hoisting-engines was patented in 1901 and was commercially used inter alia by Siemens \& Halske of Berlin. Their first electrical hoisting-engine for the Zollern II/IV mine in Dortmund gained international reputation at the Düsseldorf exhibition of 1902, and is still preserved in situ in the original machine hall of the mine, which is now a national monument in Germany. Ilgner thereafter worked with several companies to pursue his conception, became a consulting engineer in Vienna and Breslau and had a government post after the First World War in Brussels and Berlin until he retired for health reasons in 1919.[br]Bibliography1901, DRP no. 138, 387 1903, "Der elektrische Antrieb von Reversier-Walzenstraßen", Stahl und Eisen 23:769– 71.Further ReadingW.Kroker, "Karl Ilgner", Neue Deutsche Biographie, Vol. X, pp. 134–5. W.Philippi, 1924, Elektrizität im Bergbau, Leipzig (a general account).K.Warmbold, 1925, "Der Ilgner-Umformer in Förderanlagen", Kohle und Erz 22:1031–36 (a detailed description).WK -
3 signal
'siɡnəl
1. noun1) (a sign (eg a movement of the hand, a light, a sound), especially one arranged beforehand, giving a command, warning or other message: He gave the signal to advance.) señal2) (a machine etc used for this purpose: a railway signal.) señal3) (the wave, sound received or sent out by a radio set etc.) señal
2. verb1) (to make signals (to): The policeman signalled the driver to stop.) indicar, señalar2) (to send (a message etc) by means of signals.) comunicar por señas•signal1 n señalthe officer gave the signal and the soldiers advanced el oficial dio la señal y los soldados avanzaronsignal2 vb dar la señalthe officer signalled for the soldiers to advance el oficial dio la señal para que los soldados avanzarantr['sɪgnəl]1 (gen) señal nombre femenino3 (radiophonic) señal nombre femenino4 (railway) señal nombre femenino1 (achievement, triumph, success, etc) señalado,-a, destacado,-a, notable; (failure) rotundo,-a1 (indicate) indicar, señalar, marcar; (forecast) pronosticar2 (gesture) hacer señas, hacer una seña3 SMALLAUTOMOBILES/SMALL indicar1 (gesture) hacer señas, hacer una seña2 SMALLAUTOMOBILES/SMALL poner el intermitente\SMALLIDIOMATIC EXPRESSION/SMALLsignal box garita de señales1) : hacerle señas (a alguien)she signaled me to leave: me hizo señas para que saliera2) indicate: señalar, indicarsignal vi: hacer señas, comunicar por señassignal adjnotable: señalado, notablesignal n: señal fadj.• notable adj.• señalado, -a adj.n.• banderín s.m.• seña s.f.• señal (Electrónica) s.f.• signo s.m.v.• comunicar por señales v.• hacer señales a v.• señalar v.'sɪgnḷ
I
1) (agreed sign, indication) señal fthe busy signal — (AmE Telec) el tono or la señal de ocupado or (Esp) de comunicando
to call the signals — (AmE Sport) llamar las señales, decir* la jugada
I call the signals around here — (AmE) aquí quien manda soy yo, aquí yo soy quien llevo la voz cantante; (before n)
signal flag — bandera f de señales
2) ( Rail) señal f3) ( Electron) señal f
II
1.
a) ( indicate) señalarb) ( Auto)she signaled a left turn — señalizó or indicó que iba a doblar a la izquierda
c) ( gesture) (AmE) hacerle* señas/una seña a
2.
signal via) ( gesture)to signal (TO somebody) — hacer(le)* señas/una seña (a algn)
she signaled to us to leave — nos hizo señas/una seña para que nos fuéramos
b) ( Auto) señalizar*, poner* el intermitente or (Col, Méx) la direccional or (Chi) el señalizador['sɪɡnl]1.N señal f ; (Telec) señal f, tono m ; (TV, Rad) sintonía f•
it was the signal for revolt — fue la señal para la sublevación•
I can't get a signal — (Telec) no hay cobertura•
to give the signal for — dar la señal de or para•
to make a signal to sb — hacer una señal a algn2. VT1) [+ message] comunicar por señalesto signal that... — comunicar por señas que...
•
to signal a left-/right-hand turn — (Aut) indicar un giro a la izquierda/derecha2) (=signify) señalar3.VI (gen) dar una señal; (with hands) hacer señasto signal to sb that... — comunicar a algn por señas que...
4.ADJ frm notable, señalado, insigne5.CPDsignal book N — (Naut) código m de señales
signal box N — (Rail) garita f de señales
signal flag N — bandera f de señales
signal lamp N — reflector m or lámpara f de señales
* * *['sɪgnḷ]
I
1) (agreed sign, indication) señal fthe busy signal — (AmE Telec) el tono or la señal de ocupado or (Esp) de comunicando
to call the signals — (AmE Sport) llamar las señales, decir* la jugada
I call the signals around here — (AmE) aquí quien manda soy yo, aquí yo soy quien llevo la voz cantante; (before n)
signal flag — bandera f de señales
2) ( Rail) señal f3) ( Electron) señal f
II
1.
a) ( indicate) señalarb) ( Auto)she signaled a left turn — señalizó or indicó que iba a doblar a la izquierda
c) ( gesture) (AmE) hacerle* señas/una seña a
2.
signal via) ( gesture)to signal (TO somebody) — hacer(le)* señas/una seña (a algn)
she signaled to us to leave — nos hizo señas/una seña para que nos fuéramos
b) ( Auto) señalizar*, poner* el intermitente or (Col, Méx) la direccional or (Chi) el señalizador -
4 signal
['sɪgn(ə)l] 1. сущ.1) знак, сигналat / on a signal — по сигналу, по знаку
to flash / give / send a signal — подавать знак
The troops received the signal that the attack was to begin. — Войска получили сигнал к началу атаки.
The raid began at a given signal. — Рейд начался по сигналу.
- advance signalMr Blair was giving a clear signal that he might use the veto. — Господин Блэр недвусмысленно давал понять, что он, возможно, воспользуется правом вето.
- alarm signal
- call signals
- emergency signal
- light signal
- slow-down signal
- smoke signal
- stop signal
- traffic signal
- turn signal2) ( signals) воен. войска связи2. прил.1) книжн. поразительный, выдающийся, замечательный; знаменательныйSyn:2) сигнальный- signal tower
- signal beacon
- signal bridge
- signal gunSyn:3. гл.1)to signal to / at smb. — подавать сигналы кому-л.
He signalled for coffee. — Он подал сигнал, чтобы принесли кофе.
Syn: -
5 Gutenberg, Johann Gensfleisch zum
SUBJECT AREA: Paper and printing[br]b. c. 1394–9 Mainz, Germanyd. 3 February 1468 Mainz, Germany[br]German inventor of printing with movable type.[br]Few biographical details are known of Johann Gensfleisch zum Gutenberg, yet it has been said that he was responsible for Germany's most notable contribution to civilization. He was a goldsmith by trade, of a patrician family of the city of Mainz. He seems to have begun experiments on printing while a political exile in Strasbourg c. 1440. He returned to Mainz between 1444 and 1448 and continued his experiments, until by 1450 he had perfected his invention sufficiently to justify raising capital for its commercial exploitation.Circumstances were propitious for the invention of printing at that time. Rises in literacy and prosperity had led to the formation of a social class with the time and resources to develop a taste for reading, and the demand for reading matter had outstripped the ability of the scribes to satisfy it. The various technologies required were well established, and finally the flourishing textile industry was producing enough waste material, rag, to make paper, the only satisfactory and cheap medium for printing. There were others working along similar lines, but it was Gutenberg who achieved the successful adaptation and combination of technologies to arrive at a process by which many identical copies of a text could be produced in a wide variety of forms, of which the book was the most important. Gutenberg did make several technical innovations, however. The two-piece adjustable mould for casting types of varying width, from T to "M", was ingenious. Then he had to devise an oil-based ink suitable for inking metal type, derived from the painting materials developed by contemporary Flemish artists. Finally, probably after many experiments, he arrived at a metal alloy of distinctive composition suitable for casting type.In 1450 Gutenberg borrowed 800 guldens from Johannes Fust, a lawyer of Mainz, and two years later Fust advanced a further 800 guldens, securing for himself a partnership in Gutenberg's business. But in 1455 Fust foreclosed and the bulk of Gutenberg's equipment passed to Peter Schöffer, who was in the service of Fust and later married his daughter. Like most early printers, Gutenberg seems not to have appreciated, or at any rate to have been able to provide for, the great dilemma of the publishing trade, namely the outlay of considerable capital in advance of each publication and the slowness of the return. Gutenberg probably retained only the type for the 42- and 36-line bibles and possibly the Catholicon of 1460, an encyclopedic work compiled in the thirteenth century and whose production pointed the way to printing's role as a means of spreading knowledge. The work concluded with a short descriptive piece, or colophon, which is probably by Gutenberg himself and is the only output of his mind that we have; it manages to omit the names of both author and printer.Gutenberg seems to have abandoned printing after 1460, perhaps due to failing eyesight as well as for financial reasons, and he suffered further loss in the sack of Mainz in 1462. He received a kind of pension from the Archbishop in 1465, and on his death was buried in the Franciscan church in Mainz. The only major work to have issued for certain from Gutenberg's workshop is the great 42-line bible, begun in 1452 and completed by August 1456. The quality of this Graaf piece of printing is a tribute to Gutenberg's ability as a printer, and the soundness of his invention is borne out by the survival of the process as he left it to the world, unchanged for over three hundred years save in minor details.[br]Further ReadingA.Ruppel, 1967, Johannes Gutenberg: sein Leben und sein Werk, 3rd edn, Nieuwkoop: B.de Graaf (the standard biography), A.M.L.de Lamartine, 1960, Gutenberg, inventeur de l'imprimerie, Tallone.Scholderer, 1963, Gutenberg, Inventor of Printing, London: British Museum.S.H.Steinberg, 1974, Five Hundred Years of Printing 3rd edn, London: Penguin (provides briefer details).LRDBiographical history of technology > Gutenberg, Johann Gensfleisch zum
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