|
Johann Heinrich Ehrhardt
Johann Heinrich Ehrhardt, also spelled Erhardt (29 April 1805 – 29 April 1883), was a German locomotive manufacturer and inventor. Early life Ehrhardt was born on 29 April 1805 in Zella St. Blasius, Saxe-Gotha-Altenburg. He was the son of a poor gunsmith who worked in Jäger'schen wire drawing plants. When a master gunsmith visited Ehrhardt's parents, he saw Ehrhardt's technical skills and allowed him to become an apprentice gunsmith. Ehrhardt's first job as a journeyman was at the mint in Gotha. Work in Belgium Ehrhardt moved to Belgium in 1831. He worked for an optician in Brussels for half a year before moving with the John Cockerill company to Seraing, where he worked in steam engineering. While working with dewatering machines, he invented a rear cargo compartment. To acquire theoretical knowledge for future work, Ehrhardt went to the Polytechnic Institute in Düsseldorf for three months, starting in November 1833. That same year, preparations began for the construc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Germans
, native_name_lang = de , region1 = , pop1 = 72,650,269 , region2 = , pop2 = 534,000 , region3 = , pop3 = 157,000 3,322,405 , region4 = , pop4 = 21,000 3,000,000 , region5 = , pop5 = 125,000 982,226 , region6 = , pop6 = 900,000 , region7 = , pop7 = 142,000 840,000 , region8 = , pop8 = 9,000 500,000 , region9 = , pop9 = 357,000 , region10 = , pop10 = 310,000 , region11 = , pop11 = 36,000 250,000 , region12 = , pop12 = 25,000 200,000 , region13 = , pop13 = 233,000 , region14 = , pop14 = 211,000 , region15 = , pop15 = 203,000 , region16 = , pop16 = 201,000 , region17 = , pop17 = 101,000 148,00 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Le Belge (locomotive)
''Le Belge'' was a 2-2-2 ''Patentee'' type steam locomotive with tender, built in 1835 by the company founded by John Cockerill in Seraing, Belgium. It was the first steam railway locomotive built in Belgium, and was built under license to a design by Robert Stephenson & Co. Design and operation The locomotive was built for the first main line on the European mainland, the Brussels-Mechelen line. Replicas A replica locomotive was built at the workshops of Boissellerie Cognaut for the 150th anniversary in 1980 of the formation of Belgium. Another replica was built in 1885 and is now displayed at Train World, the museum of the National Railways of Belgium, in Schaerbeek, Brussels. See also *Adler (locomotive) The ''Adler'' (German for "Eagle") was the first locomotive that was successfully used commercially for the rail transport of passengers and goods in Germany. The railway vehicle was designed and built in 1835 by the British railway pioneers Geor ... References Fur ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Freiberg
Freiberg is a university and former mining town in Saxony, Germany. It is a so-called ''Große Kreisstadt'' (large county town) and the administrative centre of Mittelsachsen district. Its historic town centre has been placed under heritage conservation and is a part of the UNESCO World Heritage Site known as the Ore Mountain Mining Region, due to its exceptional testimony to the development of mining techniques across many centuries. Until 1969, the town was dominated for around 800 years by the mining and smelting industries. In recent decades it has restructured into a high technology site in the fields of semiconductor manufacture and solar technology, part of Silicon Saxony. It is home of the oldest university of mining and metallurgy in the world – the Freiberg University of Mining and Technology. Geography Location The town lies on the northern declivity of the Ore Mountains, with the majority of the borough west of the Eastern or Freiberger Mulde river. Parts ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Axle Load
An axle or axletree is a central shaft for a rotating wheel or gear. On wheeled vehicles, the axle may be fixed to the wheels, rotating with them, or fixed to the vehicle, with the wheels rotating around the axle. In the former case, bearings or bushings are provided at the mounting points where the axle is supported. In the latter case, a bearing or bushing sits inside a central hole in the wheel to allow the wheel or gear to rotate around the axle. Sometimes, especially on bicycles, the latter type axle is referred to as a ''spindle''. Terminology On cars and trucks, several senses of the word ''axle'' occur in casual usage, referring to the shaft itself, its housing, or simply any transverse pair of wheels. Strictly speaking, a shaft which rotates with the wheel, being either bolted or splined in fixed relation to it, is called an ''axle'' or ''axle shaft''. However, in looser usage, an entire assembly including the surrounding axle housing (typically a casting) is als ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oscillation
Oscillation is the repetitive or periodic variation, typically in time, of some measure about a central value (often a point of equilibrium) or between two or more different states. Familiar examples of oscillation include a swinging pendulum and alternating current. Oscillations can be used in physics to approximate complex interactions, such as those between atoms. Oscillations occur not only in mechanical systems but also in dynamic systems in virtually every area of science: for example the beating of the human heart (for circulation), business cycles in economics, predator–prey population cycles in ecology, geothermal geysers in geology, vibration of strings in guitar and other string instruments, periodic firing of nerve cells in the brain, and the periodic swelling of Cepheid variable stars in astronomy. The term ''vibration'' is precisely used to describe a mechanical oscillation. Oscillation, especially rapid oscillation, may be an undesirable phenomenon in proc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Royal Saxon State Railways
The Royal Saxon State Railways (german: Königlich Sächsische Staatseisenbahnen) were the state-owned railways operating in the Kingdom of Saxony from 1869 to 1918. From 1918 until their merger into the Deutsche Reichsbahn the title 'Royal' was dropped and they were just called the Saxon State Railways (''Sächsische Staatseisenbahnen''). History En route to a state railway After the completion of the privately financed Leipzig–Dresden railway in 1839, the Saxon parliament also began to get involved in railway construction. Early on it was recognised that railway lines to Bavaria, Bohemia and Silesia were needed and that there ought to be a route running north-to-south through the kingdom. The funding of this plan lay in the hands of privately financed railway committees. The state, however, saw itself arranging for the corresponding political and legal hurdles to be cleared. On 14 January 1841 a treaty was agreed with the Kingdom of Bavaria and the Duchy of Saxony-Altenbu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dresden
Dresden (, ; Upper Saxon: ''Dräsdn''; wen, label=Upper Sorbian, Drježdźany) is the capital city of the German state of Saxony and its second most populous city, after Leipzig. It is the 12th most populous city of Germany, the fourth largest by area (after Berlin, Hamburg and Cologne), and the third most populous city in the area of former East Germany, after Berlin and Leipzig. Dresden's urban area comprises the towns of Freital, Pirna, Radebeul, Meissen, Coswig, Radeberg and Heidenau and has around 790,000 inhabitants. The Dresden metropolitan area has approximately 1.34 million inhabitants. Dresden is the second largest city on the River Elbe after Hamburg. Most of the city's population lives in the Elbe Valley, but a large, albeit very sparsely populated area of the city east of the Elbe lies in the West Lusatian Hill Country and Uplands (the westernmost part of the Sudetes) and thus in Lusatia. Many boroughs west of the Elbe lie in the foreland of the Ore Mounta ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leipzig–Dresden Railway Company
The Leipzig–Dresden Railway Company (german: Leipzig-Dresdner Eisenbahn-Compagnie or LDE) was a private railway company in the Kingdom of Saxony, now a part of Germany. Amongst other things, it operated the route between Leipzig and Dresden, opened in 1839, and which was the first long-distance railway line in Germany. On 1 July 1876 the company was nationalised and became part of the Royal Saxon State Railways. History image:Direktorium LDE.jpg, The board of directors of the Leipzig–Dresden Railway Company in 1852; from l to r: Busse (plenipotentiary), Fleischer (deputy), Haberstadt (deputy), Einert (member), Gessler (secretary to the board), Erdmann (member), Hirzel (member), Lampe (deputy), Harkort (chairman), Dufour-Feronce (member), Seyfferth (deputy), Preusser (deputy) ''(photo of 1852)'' The idea of building a railway to link Leipzig with Strehla (on the river Elbe), had already been put forward before 1830 by the Leipzig merchant, Carl Gottlieb Tenner. Tenner's idea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chemnitz
Chemnitz (; from 1953 to 1990: Karl-Marx-Stadt , ) is the third-largest city in the German state of Saxony after Leipzig and Dresden. It is the 28th largest city of Germany as well as the fourth largest city in the area of former East Germany after (East) Berlin, Leipzig and Dresden. The city is part of the Central German Metropolitan Region, and lies in the middle of a string of cities sitting in the densely populated northern foreland of the Elster and Ore Mountains, stretching from Plauen in the southwest via Zwickau, Chemnitz and Freiberg to Dresden in the northeast. Located in the Ore Mountain Basin, the city is surrounded by the Ore Mountains to the south and the Central Saxon Hill Country to the north. The city stands on the Chemnitz River (progression: ), which is formed through the confluence of the rivers Zwönitz and Würschnitz in the borough of Altchemnitz. The name of the city as well as the names of the rivers are of Slavic origin. Chemnitz is the third larg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sächsische Maschinenfabrik
The Sächsische Maschinenfabrik in Chemnitz was one of the most important engineering companies in Saxony in the second half of the 19th century and the first two decades of the 20th century. Including its various predecessor businesses, the firm existed from 1837 until its liquidation in 1930, and individual branches of the company taken over by others continued to operate until 1990. The company is closely linked with the name of its founder and long-time manager, Richard Hartmann, whose name formed part of the new company title in 1898: the ''Sächsische Maschinenfabrik vormals Richard Hartmann'' ('Saxon Engineering Factory, formerly Richard Hartmann'). Major products The main aim of the business was the development, design and production of: * Spinning machines (1837–1998) * Locomotives (1848–1929) * Steam engines * Turbines * Mill equipment * Military technology (about 1910–1918) No less than 4,699 locomotives were built by the company between 1848 and 1929. The maj ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leipzig
Leipzig ( , ; Upper Saxon: ) is the most populous city in the German state of Saxony. Leipzig's population of 605,407 inhabitants (1.1 million in the larger urban zone) as of 2021 places the city as Germany's eighth most populous, as well as the second most populous city in the area of the former East Germany after (East) Berlin. Together with Halle (Saale), the city forms the polycentric Leipzig-Halle Conurbation. Between the two cities (in Schkeuditz) lies Leipzig/Halle Airport. Leipzig is located about southwest of Berlin, in the southernmost part of the North German Plain (known as Leipzig Bay), at the confluence of the White Elster River (progression: ) and two of its tributaries: the Pleiße and the Parthe. The name of the city and those of many of its boroughs are of Slavic origin. Leipzig has been a trade city since at least the time of the Holy Roman Empire. The city sits at the intersection of the Via Regia and the Via Imperii, two important medieval trad ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
