Mathematician, inventor and perhaps the best-known gear expert of the modern age of the automobile, Nikola Trbojevich passed on December 2, 1973 at the age of 87 in Los Angeles. Mr. Trbojevich, also known socially as Nicholas J. Terbo, was the holder of 68 U.S. patents and a similar or greater number of foreign patents. Surviving Mr. Trbojevich were his wife Alice Sinclair Hood (1891-1977) and his son William H. Terbo.
Mr. Trbojevich’s most notable work that brought him international recognition was the invention of the Hypoid gear. First published in 1923, it was a new type of spiral bevel gear employing previously unexploited mathematical techniques. The Hypoid gear is used on the great majority of all cars, trucks and military vehicles today. Together with his invention of the tools and machines necessary for its manufacture, the Hypoid gear became an integral part of the final drive mechanism of automobiles by 1931. Its effect was immediately apparent in that the overall height of rear-drive passenger automobiles was reduced by at least four inches. Found here http://www.electrotherapymuseum.com/TeslaArchive/Terbo3/Memorial1.htm Metalmite uses 6 axis lathes and 5 axis mills to stay current with technology.
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