The Electric-Lamp Industry
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Technical Details of the Elliott 152 and 153
Appendix 1 Technical Details of the Elliott 152 and 153 Introduction The Elliott 152 computer was part of the Admiralty’s MRS5 (medium range system 5) naval gunnery project, described in Chap. 2. The Elliott 153 computer, also known as the D/F (direction-finding) computer, was built for GCHQ and the Admiralty as described in Chap. 3. The information in this appendix is intended to supplement the overall descriptions of the machines as given in Chaps. 2 and 3. A1.1 The Elliott 152 Work on the MRS5 contract at Borehamwood began in October 1946 and was essen- tially finished in 1950. Novel target-tracking radar was at the heart of the project, the radar being synchronized to the computer’s clock. In his enthusiasm for perfecting the radar technology, John Coales seems to have spent little time on what we would now call an overall systems design. When Harry Carpenter joined the staff of the Computing Division at Borehamwood on 1 January 1949, he recalls that nobody had yet defined the way in which the control program, running on the 152 computer, would interface with guns and radar. Furthermore, nobody yet appeared to be working on the computational algorithms necessary for three-dimensional trajectory predic- tion. As for the guns that the MRS5 system was intended to control, not even the basic ballistics parameters seemed to be known with any accuracy at Borehamwood [1, 2]. A1.1.1 Communication and Data-Rate The physical separation, between radar in the Borehamwood car park and digital computer in the laboratory, necessitated an interconnecting cable of about 150 m in length. -
The Electric Arc Plasma Temperature
DIAGNOSTICS OF MULTICOMPONENT ELECTRIC ARC PLASMA A.I. Cheredarchuk, V.F. Boretskij, A.N. Veklich Taras Shevchenko Kiev National University, Kiev, Ukraine E-mail: [email protected] The plasma parameters of electric arc discharge in a gas flow between copper electrodes were investigated. The electrical conductivity of copper-argon and copper-carbon dioxide plasma was calculated. It was found that at low temperatures (5000 K<T<9000 K) the electrical conductivity considerably depends on the amount of copper in plasma. PACS: 51.20.d 1. INTRODUCTION Ne(r) in discharge at 30 A were obtained from width of The electric arc between evaporated electrodes has spectral lines CuI 448.0 nm, broadened due to the quadratic diverse technological applications. It is well known that Stark effect. In the case of low current (3.5 A) absolute electrode vapours have a determining influence on intensity of CuI 465.1 nm spectral line was used. properties of arc plasma. The insignificant impurity N , m-3 (about 1 %) of electrode metal vapour appreciably j CO 2 changes plasma parameters of the discharge in a rather CO wide temperature range [1]. Unfortunately the influence O O e of metal impurity on the plasma of free burning electric 1E23 2 C arc discharge in different working gases is not O+ experimentally investigated in detail yet. The main aim of this study is a development of complex diagnostics techniques of determination of 1E20 plasma parameters of electric arc discharge in a gas flow between copper electrodes. + CO 2. TRANSPORT PROPERTIES C 2 T, K 1E17 OF THERMAL PLASMA 5000 10000 15000 20000 In calculations of the transport properties of thermal plasma it is necessary to know the proportion between Fig. -
2014 10 Spectrum
Contents | Zoom in | Zoom outFor navigation instructions please click here Search Issue | Next Page IBM’S “BRAIN CHIP” NEARLY PERFECT A SHADOWY CARTEL GOOGLECAR'S BLINKS INTO BEING ATOMIC CLOCKS RULED THE LIGHT DRIVING TEST It’s a stamp-size One second off The long legacy of We've got the supercomputer in 14 billion years the Phoebus cartel details online at P. 13 P. 36 P. 50 SPECTRUM.IEEE.ORG____________ FOR THE TECHNOLOGY INSIDER | 10.14 Why Voice Quality Stinks… And Why It Doesn’t Have To P. 30 Contents | Zoom in | Zoom outFor navigation instructions please click here Search Issue | Next Page qM qMqM Previous Page | Contents | Zoom in | Zoom out | Front Cover | Search Issue | Next Page qMqM Qmags THE WORLD’S NEWSSTAND® NOW AVAILABLE comsol.com/release/5.0 FROM MODEL TO APP The Application Builder provides you with Verify and Optimize your Designs with tools to easily design a custom interface for your multiphysics models. Use ® COMSOL Server to distribute your apps to COMSOL Multiphysics colleagues and customers worldwide. Visit comsol.com/release/5.0 NOW FEATURING THE APPLICATION BUILDER PRODUCT SUITE COMSOL Multiphysics COMSOL Server ELECTRICAL FLUID MULTIPURPOSE INTERFACING AC/DC Module CFD Module Optimization Module LiveLink™ for MATLAB® RF Module Mixer Module Material Library LiveLink™ for Excel® Wave Optics Module Microfl uidics Module Particle Tracing Module CAD Import Module Ray Optics Module Subsurface Flow Module Design Module MEMS Module Pipe Flow Module ECAD Import Module Plasma Module Molecular Flow Module LiveLink™ for -
Sir William Siemens (1823–1883)
Sir William Siemens (1823–1883) Wilhelm Siemens (1823–1883), who changed his first name to William after moving to England, was born on April 4, 1823, in Lenthe near Hanover, Germany. He accompanied his older brother Werner von Siemens, who was then serving in the Prussian army, to Magdeburg, where he attended trade school. After dropping out of a practical engineering program in Magdeburg and abandoning the study of natural sciences at the University of Göttingen, William spent the spring and summer of 1843 in England. Here he succeeded in patenting the silver and gold-plating technique developed by Werner and selling the rights to the English company of Elkington for £1,600 or roughly 30,000 marks. This success not only helped the brothers out of major financial difficulties; it also encouraged William to consider moving to England. Werner supported the idea, and William traveled to England again in January 1844. However, the quick success of the previous year could not be immediately repeated. Only gradually did the situation improve. From 1849, William held a permanent position as an engineer in Birmingham. At the same time, he also worked on his own inventions, among them a water meter that later proved very successful. In 1850, William took over the management of the newly established agency of Siemens & Halske in London, although its beginnings were somewhat inauspicious. The manufacture and laying of submarine telegraph cables opened up new business opportunities. William’s good contacts with engineering circles and government authorities facilitated the otherwise difficult entry into the highly developed English telegraph market, where private operating companies were in competition with one another. -
!History of Lightingv2.Qxd
CONTENTS Introduction 3 The role of lighting in modern society 3 1. The oldest light sources 4 Before the advent of the lamp 4 The oldest lamps 4 Candles and torches 5 Further development of the oil lamp 6 2. Gaslight 9 Introduction 9 Early history 9 Gas production 10 Gaslight burners 10 The gas mantle 11 3. Electric lighting before the incandescent lamp 14 Introduction 14 Principle of the arc lamp 15 Further development of the arc lamp 16 Applications of the arc lamp 17 4. The incandescent lamp 20 The forerunners 20 The birth of the carbon-filament lamp 22 Further development of the carbon-filament lamp 25 Early metal-filament lamps 27 The Nernst lamp 28 The birth of the tungsten-filament lamp 29 Drawn tungsten filaments 30 Coiled filaments 30 The halogen incandescent lamp 31 5. Discharge lamps 32 Introduction 32 The beginning 32 High-voltage lamps 33 Early low-pressure mercury lamps 34 The fluorescent lamp 35 High-pressure mercury lamps 36 Sodium lamps 37 The xenon lamp 38 6. Electricity production and distribution 39 Introduction 39 Influence machines and batteries 39 Magneto-electric generators 40 Self-exciting generators 41 The oldest public electricity supply systems 41 The battle of systems 42 The advent of modern a.c. networks 43 The History of Light and Lighting While the lighting industry is generally recognized as being born in 1879 with the introduction of Thomas Alva Edison’s incandescent light bulb, the real story of light begins thousands of years earlier. This brochure was developed to provide an extensive look at one of the most important inventions in mankind’s history: artificial lighting. -
British Engineering in the Twentieth Century.Doc Page 1 of 2 the British
British Engineering in the Twentieth Century.doc Page 1 of 2 The British Thomson Houston company was formed in 1896, though its roots date back some ten years earlier. Manufacturing in the UK started in Rugby in March 1902 with a factory of 206,000 sq. ft. The plant produced its first turbo-alternator in 1905 and in 1907 BTH engaged in a joint venture with Wolseley Motors to construct petrol-electric buses. 1909 saw the Company involved in providing electrical equipment for the first trolley buses in London. From day one, the company was connected with the manufacture of incandescent lamps. In 1911 they obtained all the GE patents for drawn-wire tungsten filaments and the Mazda trade mark. Leading up to the Second World War, BTH was heavily involved in jet engine design and when the war began it manufactured magnetos, compressors, switchgear and was involved in the development of radar. On the 1st January 1960 BTH and Metropolitan Vickers were merged into AEI (Associated Electrical Industries Limited) and the BTH and MV names were lost forever in the world of electrical engineering. The American-owned firm British Westinghouse was responsible for the formation of Metropolitan-Vickers. MV was established in 1899 and located in Trafford Park, Manchester. This was an industrial area that became the focal point of many of MV’s activities. Metrovick was particularly successful in South Africa, Australia and New Zealand and, in 1922 alone, provided £1 million worth of railway traction equipment to South Africa. The 1920s was a period of considerable development for Metrovick with technical advances in the manufacture of turbines, generators, switchgear and industrial motors. -
Electric Light Pdf, Epub, Ebook
ELECTRIC LIGHT PDF, EPUB, EBOOK Seamus Heaney | 96 pages | 19 Mar 2001 | FABER & FABER | 9780571207985 | English | London, United Kingdom Electric Light PDF Book Tour EL: 5 min videos on each light type, followed by a 5 question quiz for each lamp type. Wednesday 17 June In , Thomas Edison began serious research into developing a practical incandescent lamp and on October 14, , Edison filed his first patent application for "Improvement In Electric Lights". Sunday 27 September Wednesday 29 July Wednesday 16 September View all albums. Saturday 10 October View all similar artists. In colder climates where heating and lighting is required during the cold and dark winter months, the heat byproduct has some value. Saturday 15 August Similar To Jeff Lynne. Tuesday 18 August Monday 25 May Wednesday 22 April Play album Buy Loading. Friday 24 April Wednesday 15 July Main article: Incandescent light bulb. Wednesday 14 October Help Learn to edit Community portal Recent changes Upload file. Features Exploring the local sounds and scenes at Noise Pop Fest. Due to the importance of this area of engineering we offer a full course of web pages, videos, and educational tools to communicate to you the world of of the electric light and the engineers and inventors who made it possible. Friday 31 July Monday 8 June Friday 21 August Sunday 18 October Friday 26 June The inside of the tubes are coated with phosphors that give off visible light when struck by ultraviolet photons. Friday 4 September Connect to Spotify Dismiss. Thursday 7 May Sunday 31 May Wednesday 1 July Tuesday 20 October The electric arc is struck by touching the rod tips then separating them. -
Humphry Davy and the Arc Light
REMAKING HISTORY By William Gurstelle Humphry Davy and the Arc Light » Thomas Edison did not invent the first electric BRILLIANT light.* More than 70 years before Edison’s 1879 MISTAKES: Humphry Davy, incandescent lamp patent, the English scientist chemist, inventor, Humphry Davy developed a technique for produc- and philosopher: ing controlled light from electricity. “I have learned Sir Humphry Davy (1778–1829) was one of the more from my failures than from giants of 19th-century science. A fellow of the my successes.” prestigious Royal Society, Davy is credited with discovering, and first isolating, elemental sodium, potassium, calcium, magnesium, boron, barium, and strontium. A pioneer in electrochemistry, he appeared between the electrode tips, Davy had to also developed the first medical use of nitrous oxide separate the carbon electrodes slightly and care- and invented the miner’s safety lamp. The safety fully in order to sustain the continuous, bright arc lamp alone is directly responsible for saving of electricity. Once that was accomplished, he found hundreds, if not thousands, of miners’ lives. the device could sustain the arc for long periods, But it is his invention of the arc lamp for which we even as the carbon rods were consumed in the heat remember him here. Davy’s artificial electric light of the process. consisted of two carbon rods, made from wood Davy’s arc lamp of 1807 was not economically charcoal, connected to the terminals of an enormous practical until the cost of producing a 50V-or-so collection of voltaic cells. (In Davy’s day, thousands power supply became reasonable. -
History of Electric Light
SMITHSONIAN MISCELLANEOUS COLLECTIONS VOLUME 76. NUMBER 2 HISTORY OF ELECTRIC LIGHT BY HENRY SGHROEDER Harrison, New Jersey PER\ ^"^^3^ /ORB (Publication 2717) CITY OF WASHINGTON PUBLISHED BY THE SMITHSONIAN INSTITUTION AUGUST 15, 1923 Zrtie Boxb QSaftitnore (prcee BALTIMORE, MD., U. S. A. CONTENTS PAGE List of Illustrations v Foreword ix Chronology of Electric Light xi Early Records of Electricity and Magnetism i Machines Generating Electricity by Friction 2 The Leyden Jar 3 Electricity Generated by Chemical Means 3 Improvement of Volta's Battery 5 Davy's Discoveries 5 Researches of Oersted, Ampere, Schweigger and Sturgeon 6 Ohm's Law 7 Invention of the Dynamo 7 Daniell's Battery 10 Grove's Battery 11 Grove's Demonstration of Incandescent Lighting 12 Grenet Battery 13 De Moleyns' Incandescent Lamp 13 Early Developments of the Arc Lamp 14 Joule's Law 16 Starr's Incandescent Lamp 17 Other Early Incandescent Lamps 19 Further Arc Lamp Developments 20 Development of the Dynamo, 1840-1860 24 The First Commercial Installation of an Electric Light 25 Further Dynamo Developments 27 Russian Incandescent Lamp Inventors 30 The Jablochkofif " Candle " 31 Commercial Introduction of the Differentially Controlled Arc Lamp ^3 Arc Lighting in the United States 3;^ Other American Arc Light Systems 40 " Sub-Dividing the Electric Light " 42 Edison's Invention of a Practical Incandescent Lamp 43 Edison's Three-Wire System 53 Development of the Alternating Current Constant Potential System 54 Incandescent Lamp Developments, 1884-1894 56 The Edison " Municipal -
A GLOSSARY of THEATRE TERMS © Peter D
A GLOSSARY OF THEATRE TERMS © Peter D. Lathan 1996-1999 http://www.schoolshows.demon.co.uk/resources/technical/gloss1.htm Above the title In advertisements, when the performer's name appears before the title of the show or play. Reserved for the big stars! Amplifier Sound term. A piece of equipment which ampilifies or increases the sound captured by a microphone or replayed from record, CD or tape. Each loudspeaker needs a separate amplifier. Apron In a traditional theatre, the part of the stage which projects in front of the curtain. In many theatres this can be extended, sometimes by building out over the pit (qv). Assistant Director Assists the Director (qv) by taking notes on all moves and other decisions and keeping them together in one copy of the script (the Prompt Copy (qv)). In some companies this is done by the Stage Manager (qv), because there is no assistant. Assistant Stage Manager (ASM) Another name for stage crew (usually, in the professional theatre, also an understudy for one of the minor roles who is, in turn, also understudying a major role). The lowest rung on the professional theatre ladder. Auditorium The part of the theatre in which the audience sits. Also known as the House. Backing Flat A flat (qv) which stands behind a window or door in the set (qv). Banjo Not the musical instrument! A rail along which a curtain runs. Bar An aluminium pipe suspended over the stage on which lanterns are hung. Also the place where you will find actors after the show - the stage crew will still be working! Barn Door An arrangement of four metal leaves placed in front of the lenses of certain kinds of spotlight to control the shape of the light beam. -
Fading Lights, Transitions in Theatre Lighting in a Historical Context
Fading Lights Transitions in theatre lighting in a historical context by Chris Van Goethem (english revision by Gitta Van Goethem) Fading Lights is a cooperative project between the Expertise Center for Technical Theatre and the Stockholm Academy of Dramatic Arts. The project researches the history of lighting with a focus on the transitions between subsequent technologies. In the context of the im- minent transition to more LED sources, it seems useful to us to look at earlier transitions and maybe learn something from them. In other words, we would like to fnd out how the tech- nician, the designer, and the audience have adapted to the transition from candlelight to gas lights, to electrical lighting. The frst types of theatre were performed in daylight or with the lighting equipment that was at hand for domestic use. Those would have been torches, cressets, tapers, etc. In smaller spaces, dipped candles from animal fat were used among other things. Those were cheap, but gave off a conside- rable amount of smoke and stench. Apart from that, lamps based on a wick dipped in vegetable oil were used. Candles from bees wax were expensive en were therefore only used in extraordinary circumstances, when high-ranking people were present. The most important function of these sources of light was making the actors visible. Although we must also point out that some light sources 3 different types of cressets were manipulated by the actors so they could stress certain things. Some light sour- ces were also used purely symbolic to, for ex- ample, show that it was night, even though the play was during the day. -
Section H — Electricity
H01K SECTION H — ELECTRICITY H01 BASIC ELECTRIC ELEMENTS XXXX H01K H01K XXXX H01K ELECTRIC INCANDESCENT LAMPS (details, apparatus or processes for manufacture applicable to both discharge devices and incandescent lamps H01J; light sources using a combination of incandescent and other types of light generation H01J 61/96, H05B 35/00) Note(s) In this subclass, the following term is used with the meaning indicated: - "lamp" includes tubes emitting ultra-violet or infra-red light. Subclass indexes CHARACTERISED BY UTILISATION 9/00 General lighting; other lighting ....................... 5/00; 7/00 DETAILS .................................................................................. 1/00 CHARACTERISED BY THE MANUFACTURE ..................................................................... 3/00 INCANDESCENT BODY Non-conductive; non-conductive in the cold state; multiple ............................... 11/00; 13/00; 1 / 48 . Removable caps [1, 2006.01] 1 / 00 Details [1, 2006.01] 1 / 50 . Selection of substances for gas fillings; Specified 1 / 02 . Incandescent bodies [1, 2006.01] pressure thereof [1, 2006.01] 1 / 04 . characterised by the material thereof [1, 2006.01] 1 / 52 . Means for obtaining or maintaining the desired 1 / 06 . Carbon bodies [1, 2006.01] pressure within the vessel [1, 2006.01] 1 / 08 . Metallic bodies [1, 2006.01] 1 / 54 . Means for adsorbing or absorbing gas, or for 1 / 10 . Bodies of metal or carbon combined with other preventing or removing efflorescence, e.g. by substance [1, 2006.01] gettering [1, 2006.01] 1 / 12 . Bodies which are non-conductive when cold, 1 / 56 . characterised by the material of the e.g. for Nernst lamp [1, 2006.01] getter [1, 2006.01] 1 / 14 . characterised by the shape [1, 2006.01] 1 / 58 .