Monopoly capitalism From the "steam age" to "electric age" Last 30 years of the 19th century and early 20th century, science and technology ushered in a new spring, science and technology also made a series of major breakthroughs and progress, followed, it is the upsurge of industrial production. The scientific and technological progress of modern history, known as the second industrial revolution, which marked the world by the "steam age" into the "electric age." The industrial revolution in the sixties and seventies of the 19th century began in the late 19th century early 20th century, basically completed. Its extensive use of electricity for the remarkable features. Among them, the generator and motor are linked two important inventions. Generator is the mechanical energy into electrical energy; motors, by contrast, is the electrical energy into mechanical energy. As early as 1819, 传奇s服 Danish Oersted discovered the magnetic effect of current, to 30 years, the British scientist Michael Faraday discovered electromagnetic induction phenomenon, which laid the theoretical foundation for the generator. Siemens 1866 Germany made a self-excited DC generator. Although this is still not perfect, but after many efforts, to 70 years, finally put into practical operation. In 1882, French scholar found a long-distance transmission Depreux method; same year, the American inventor Thomas Edison in New York established the first U.S. thermal power stations, transmission lines connected to a network. Power began as the machine's power, its energy is far more than the large steam engine, and use much more convenient, so soon to call for energy products is rapidly being invented, such as lights, electric drill, train, telegraph, telephone and welding technologies. This not only been the rapid development of production technology, but also established a long-distance rapid communications equipment. Widespread use of electricity, making demand for electricity, so there has been a German Madepule long-distance transmission technology on the invention; U.S. inventor Thomas Edison also built 传奇sf a big first thermal power station, power transmission lines formed a network. Manufacture of power generation, transmission and distribution equipment, power industry have also established and developed the world's developed countries to take the lead from the steam engine era into the electric age. On the other hand, With the significant increase in energy demand and the expansion of regional power, DC motor show expensive, often out of accidents and so on, so from the 19th century, since the 80, people would put on the AC on. 1885 Italian scientist Farari proposed rotating magnetic field principle, the invention of the AC motor has great significance. The late 80s early 90s, it created a three-phase induction motor, this form of motor, still in use. After 1891, more economical and reliable three-phase system of alternating current to the promotion, the power industry into a new stage of development. Application of the second industrial revolution technology is another major achievement 传奇私服 of the invention and application of internal combustion engines. In 1876, German Otto built the first gas-fueled four-stroke internal combustion engine, a popular small-scale power machine. In 1883, German engineer Daimler has made to gasoline-fueled internal combustion engine, it has the horsepower, light weight, small size, high efficiency, the engine can be used as means of transport. In 1885, German mechanical engineer Karl Benz produced the first car, the Heights known as the "Father of cars." This car makes Benz patented the first of the Motor. Then, the German engineers in 1897, Diesel has created a structure more simple, cheaper fuel internal combustion engine - diesel, this engine though cumbersome than using gasoline internal combustion engine, but it is very suitable for heavy vehicles. Communication during this period has also been considerable development and progress. In the 1876 Philadelphia World's Fair, from Scotland, Bell moved to the United States show was called "Far Hearing," the phone, causing a sensation. Phone technology is improved and extended, developed rapidly. In 1880, Bell Telegraph Company was established, it is today AT & T Inc. (AT & T) of the predecessor. 80 19th century, German physicist 英雄合击 Hertz proved the existence of electromagnetic waves, and measure the wavelength and speed of electromagnetic waves. Italian troops to Neely with Hertz's discovery, made wireless telegraphy communications equipment. In 1894, he used a very simple device, and began a short distance wireless telegraphy experiments; in 1899, he successfully transmitters between Britain and France; two years after the success of transmitters across the Atlantic. Par
iqwsf le mercredi 08 septembre 2010
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