Marconi and Tesla: Great Inventors at the turn of the 20th Century. скачать в хорошем качестве

Marconi and Tesla: Great Inventors at the turn of the 20th Century.

Guglielmo Marconi (1874–1937) was an Italian inventor and electrical engineer, known for his creation of a practical radio wave-based wireless telegraph system. This led to Marconi being credited as the inventor of radio, and he shared the 1909 Nobel Prize in Physics with Karl Ferdinand Braun "in recognition of their contributions to the development of wireless telegraphy". Marconi was also an entrepreneur, businessman, and founder of The Wireless Telegraph & Signal Company in the United Kingdom in 1897 (which became the Marconi Company). In 1929, Marconi was ennobled as a Marchese (marquis) by King Victor Emmanuel III of Italy, and, in 1931, he set up Vatican Radio for Pope Pius XI. In the early 1890s, he began working on the idea of "wireless telegraphy", that is, the transmission of telegraph messages without connecting wires as used by the electric telegraph. This was not a new idea. Numerous investigators and inventors had been exploring wireless telegraph technologies and even building systems using electric conduction, electromagnetic induction and optical (light) signalling for over 50 years, but none had proven technically and commercially successful. A relatively new development came from Heinrich Hertz, who, in 1888, demonstrated that one could produce and detect electromagnetic radiation, based on the work (published in 1865) by the Scottish mathematician James C. Maxwell (1831–1879). At the time, this radiation was commonly called "Hertzian" waves, and is now generally referred to as radio waves. The monopole antenna was invented by Marconi in 1895. For this reason it is sometimes called the Marconi antenna. The height of the linear antenna is approximately one quarter of the wavelength of the radio waves produced. The role played by Marconi Co. wireless in maritime rescues raised public awareness of the value of radio and brought fame to Marconi, particularly the sinking of the (Royal Mail Ship) Titanic on 15 April 1912 and the RMS Lusitania on 7 May 1915. ----------------------------------------------------------------------------------------------------------------------- Nikola Tesla (1856–1943) was an Austrian Empire-American inventor, electrical engineer, mechanical engineer, and futurist best known for his contributions to the design of the modern alternating current (AC) electricity supply system. Born and raised in Smiljan (Austrian Empire, modern-day Croatia), Tesla studied engineering and physics in the 1870s without receiving a degree, gaining practical experience in the early 1880s working in telephony and at Continental Edison in the new electric power industry. In 1884 he emigrated to the United States, where he became a naturalized citizen. He worked for a short time at the Edison Machine Works in New York City before he struck out on his own. With the help of partners to finance and market his ideas, Tesla set up laboratories and companies in New York to develop a range of electrical and mechanical devices. His alternating current (AC) induction motor and related polyphase AC patents, licensed by Westinghouse Electric in 1888, earned him a considerable amount of money and became the cornerstone of the polyphase system which that company eventually marketed. Piano Improvisations © 2023