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  • 41 Herbert, Edward Geisler

    [br]
    b. 23 March 1869 Dedham, near Colchester, Essex, England
    d. 9 February 1938 West Didsbury, Manchester, England
    [br]
    English engineer, inventor of the Rapidor saw and the Pendulum Hardness Tester, and pioneer of cutting tool research.
    [br]
    Edward Geisler Herbert was educated at Nottingham High School in 1876–87, and at University College, London, in 1887–90, graduating with a BSc in Physics in 1889 and remaining for a further year to take an engineering course. He began his career as a premium apprentice at the Nottingham works of Messrs James Hill \& Co, manufacturers of lace machinery. In 1892 he became a partner with Charles Richardson in the firm of Richardson \& Herbert, electrical engineers in Manchester, and when this partnership was dissolved in 1895 he carried on the business in his own name and began to produce machine tools. He remained as Managing Director of this firm, reconstituted in 1902 as a limited liability company styled Edward G.Herbert Ltd, until his retirement in 1928. He was joined by Charles Fletcher (1868–1930), who as joint Managing Director contributed greatly to the commercial success of the firm, which specialized in the manufacture of small machine tools and testing machinery.
    Around 1900 Herbert had discovered that hacksaw machines cut very much quicker when only a few teeth are in operation, and in 1902 he patented a machine which utilized this concept by automatically changing the angle of incidence of the blade as cutting proceeded. These saws were commercially successful, but by 1912, when his original patents were approaching expiry, Herbert and Fletcher began to develop improved methods of applying the rapid-saw concept. From this work the well-known Rapidor and Manchester saws emerged soon after the First World War. A file-testing machine invented by Herbert before the war made an autographic record of the life and performance of the file and brought him into close contact with the file and tool steel manufacturers of Sheffield. A tool-steel testing machine, working like a lathe, was introduced when high-speed steel had just come into general use, and Herbert became a prominent member of the Cutting Tools Research Committee of the Institution of Mechanical Engineers in 1919, carrying out many investigations for that body and compiling four of its Reports published between 1927 and 1933. He was the first to conceive the idea of the "tool-work" thermocouple which allowed cutting tool temperatures to be accurately measured. For this advance he was awarded the Thomas Hawksley Gold Medal of the Institution in 1926.
    His best-known invention was the Pendulum Hardness Tester, introduced in 1923. This used a spherical indentor, which was rolled over, rather than being pushed into, the surface being examined, by a small, heavy, inverted pendulum. The period of oscillation of this pendulum provided a sensitive measurement of the specimen's hardness. Following this work Herbert introduced his "Cloudburst" surface hardening process, in which hardened steel engineering components were bombarded by steel balls moving at random in all directions at very high velocities like gaseous molecules. This treatment superhardened the surface of the components, improved their resistance to abrasion, and revealed any surface defects. After bombardment the hardness of the superficially hardened layers increased slowly and spontaneously by a room-temperature ageing process. After his retirement in 1928 Herbert devoted himself to a detailed study of the influence of intense magnetic fields on the hardening of steels.
    Herbert was a member of several learned societies, including the Manchester Association of Engineers, the Institute of Metals, the American Society of Mechanical Engineers and the Institution of Mechanical Engineers. He retained a seat on the Board of his company from his retirement until the end of his life.
    [br]
    Principal Honours and Distinctions
    Manchester Association of Engineers Butterworth Gold Medal 1923. Institution of Mechanical Engineers Thomas Hawksley Gold Medal 1926.
    Bibliography
    E.G.Herbert obtained several British and American patents and was the author of many papers, which are listed in T.M.Herbert (ed.), 1939, "The inventions of Edward Geisler Herbert: an autobiographical note", Proceedings of the Institution of Mechanical Engineers 141: 59–67.
    ASD / RTS

    Biographical history of technology > Herbert, Edward Geisler

  • 42 científico

    adj.
    scientific.
    m.
    scientist, investigator, researcher.
    * * *
    1 scientific
    ► nombre masculino,nombre femenino
    1 scientist
    * * *
    1. (f. - científica)
    noun
    2. (f. - científica)
    adj.
    * * *
    científico, -a
    1.
    2.
    SM / F scientist

    científico/a social — social scientist

    * * *
    I
    - ca adjetivo scientific
    II
    - ca masculino, femenino scientist
    * * *
    I
    - ca adjetivo scientific
    II
    - ca masculino, femenino scientist
    * * *
    científico1
    1 = scholar, scientist.

    Ex: Under 'American scholar' he found editions published beginning, I believe, in the 1880s.

    Ex: Thus the electronic journal (e-journal) is a concept where scientists are able to input ideas and text to a computer data base for their colleagues to view, and similarly to view the work of others.
    * científico de la industria = industrial scientist.
    * científico de las ciencias de la tierra = geoscientist.
    * científico de la universidad = academic scientist.
    * científico del gobierno = government scientist.
    * científico teórico = theorist.

    científico2
    2 = academic, learned, scholarly, scientific.

    Ex: Academic disputations are generally entered under the heading for the faculty moderator.

    Ex: Abstracts will accompany various learned, technical or scholarly contributions.
    Ex: Personal authorship has been accepted for some time, and indeed reflects the scholarly practice of the western world.
    Ex: Over one hundred data bases are available, of which around half could be broadly categorised as scientific and technical.
    * argumento científico = scientific argument.
    * campo científico = academic field, scientific field.
    * científico-técnico = scientific-technical, sci-tech [scitech o sci/tech].
    * científico-tecnológico = scientific-technological.
    * comité científico = scientific committee.
    * comunidad científica, la = scientific community, the, research community, the, scientific research community, the, scholarly community, the.
    * CRISP (Recuperación Automatizada de Información sobre Proyectos Científicos) = CRISP (Computer Retrieval of Information on Scientific Projects).
    * cuestión científica = scientific issue.
    * cultura científica = scientific culture.
    * debate científico = scientific debate.
    * deshonestidad científica = scientific misconduct.
    * disciplina científica = scientific discipline.
    * documento científico = scholarly work.
    * expresión científica = scientific locution.
    * falta de ética científica profesional = scientific misconduct.
    * fraude científico = scientific fraud.
    * histórico-científico = historico-scientific.
    * información científica y técnica = scientific and technical information (STI).
    * informe científico = scientific report.
    * Instituto de Información Científica (ISI) = Institute of Scientific Information (ISI).
    * ley de productividad científica de Lotka = Lotka's scientific productivity law.
    * leyes científicas = laws of physics.
    * literatura científica = scientific literature.
    * locución científica = scientific locution.
    * mala conducta científica = scientific misconduct.
    * mal comportamiento científico = scientific misconduct.
    * mundo científico, el = scholarly community, the, scientific world, the.
    * no científico = unscientific.
    * pensamiento científico = scientific thought.
    * poco científico = unscientific.
    * política científica = scientific policy.
    * producción científica = scholarly output.
    * producción científica de investigación = research literature.
    * productividad científica = scientific productivity.
    * reunión científica = scientific research meeting.
    * revista científica = journal, scholarly journal, scientific journal, technical journal, academic journal.
    * trabajo científico = scholarly work.

    * * *
    scientific
    masculine, feminine
    scientist
    Compuesto:
    científico/científica espacial
    masculine, feminine space scientist
    * * *

     

    científico
    ◊ -ca adjetivo

    scientific
    ■ sustantivo masculino, femenino
    scientist
    científico,-a
    I adjetivo scientific
    II sustantivo masculino y femenino scientist

    ' científico' also found in these entries:
    Spanish:
    científica
    - hallazgo
    - investigador
    - investigadora
    - rigor
    - nombre
    English:
    espionage
    - scientific
    - scientist
    - bias
    - hit
    - open
    - unscientific
    * * *
    científico, -a
    ♦ adj
    scientific
    ♦ nm,f
    1. [investigador] scientist
    2. Méx Pol = one of the group of Europeanizing intellectuals influential during the rule of Porfirio Díaz (1876-1911)
    * * *
    I adj scientific
    II m, científica f scientist
    * * *
    científico, -ca adj
    : scientific
    científico, -ca n
    : scientist
    * * *
    científico1 adj scientific
    científico2 n scientist

    Spanish-English dictionary > científico

  • 43 Stibitz, George R.

    [br]
    b. 20 April 1904 York, Pennsylvania, USA
    [br]
    American mathematician responsible for the conception of the Bell Laboratories "Complex " computer.
    [br]
    Stibitz spent his early years in Dayton, Ohio, and obtained his first degree at Denison University, Granville, Ohio, his MS from Union College, Schenectady, New York, in 1927 and his PhD in mathematical physics from Cornell University, Ithaca, New York, in 1930. After working for a time for General Electric, he joined Bell Laboratories to work on various communications problems. In 1937 he started to experiment at home with telephone relays as the basis of a calculator for addition, multiplication and division. Initially this was based on binary arithmetic, but later he used binary-coded decimal (BCD) and was able to cope with complex numbers. In November 1938 the ideas were officially taken up by Bell Laboratories and, with S.B.Williams as Project Manager, Stibitz built a complex-number computer known as "Complex", or Relay I, which became operational on 8 January 1940.
    With the outbreak of the Second World War, he was co-opted to the National Defence Research Council to work on anti-aircraft (AA) gun control, and this led to Bell Laboratories Relay II computer, which was completed in 1943 and which had 500 relays, bi-quinary code and selfchecking of errors. A further computer, Relay III, was used for ballistic simulation of actual AA shell explosions and was followed by more machines before and after Stibitz left Bell after the end of the war. Stibitz then became a computer consultant, involved in particular with the development of the UNIVAC computer by John Mauchly and J.Presper Eckert.
    [br]
    Principal Honours and Distinctions
    Institute of Electrical and Electronics Engineers Emanuel R.Priore Award 1977.
    Bibliography
    1957, with J.A.Larrivee, Mathematics and Computers, New York: McGraw-Hill. 1967, "The Relay computer at the Bell Laboratories", Datamation 35.
    Further Reading
    E.Loveday, 1977, "George Stibitz and the Bell Labs Relay computer", Datamation 80. M.R.Williams, 1985, A History of Computing Technology, London: Prentice-Hall.
    KF

    Biographical history of technology > Stibitz, George R.

Страницы

См. также в других словарях:

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