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A Schmidt coupling is a type of coupling designed to accommodate large radial displacement between two shafts. Consisting of an arrangement of links and discs—three discs rotating in unison, interconnected in series by six or more links—a Schmidt coupling can adapt to wide variations in radial displacement while running under load. == History == In 1960, NASA commissioned Richard Schmidt of Madison, Alabama, to develop a propulsion system for rockets in zero-gravity environments. One of the solutions suggested was a system of rotating discs with mass points positioned along their circumferences. To power these discs, Schmidt used rotating slider cranks similar to those used to transfer power to the wheels of a steam locomotive. Similar disc-and-link arrangement had been known to German engineers for some time, but engineers could not make the theory work in practice because they erroneously assumed the center disc would require its own bearing. Schmidt found that the center disc could in fact assume its own center of rotation. Schmidt further refined the design, creating a coupling system that guarantees a completely true angle of rotation at all times. Additionally, Schmidt’s design eliminates the generation of net external forces, as its pushing and pulling forces alternate and overlap in a sinusoidal pattern. In May 1963, Schmidt applied for a patent for his “coupling for precise angular transmission of rotational motion” at the Munich, Germany, patent office. The company SCHMIDT-KUPPLUNG GmbH was established in 1965 by Richard Schmidt and Walter Haarmann to sell the soon-to-be-patented Schmidt coupling. The patent for the Schmidt coupling, as it came to be known, was granted in February 1967. Schmidt couplings entered the United States coupling market place in 1984 when Zero-Max, Inc. acquired Schmidt Couplings, Inc. SCHMIDT-KUPPLUNG GmbH has entered the Indian market through their channel partner M/s. RSV Industries Private Limited located in Mumbai,India.〔http://www.schmidt-kupplung.com/en/company/international-partners.html〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Schmidt coupling」の詳細全文を読む スポンサード リンク
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