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Geometric dimensioning and tolerancing (GD&T) is a system for defining and communicating engineering tolerances via a symbolic language on engineering drawings and computer-generated 3D models that describes a physical object's nominal geometry and the permissible variation thereof. GD&T is used to define the nominal (theoretically perfect ...
ASME Y14.5 is a standard published by the American Society of Mechanical Engineers (ASME) to establish rules, symbols, definitions, requirements, defaults, and recommended practices for stating and interpreting Geometric Dimensions and Tolerances (GD&T). [1]
John Smeaton FRS (8 June 1724 – 28 October 1792) was an English civil engineer responsible for the design of bridges, canals, harbours and lighthouses. [1] He was also a capable mechanical engineer and an eminent physicist. Smeaton was the first self-proclaimed "civil engineer", and is often regarded as the "father of civil engineering". [2]
John George Kemeny (born Kemény János György; May 31, 1926 [1] – December 26, 1992) was a Hungarian-born American mathematician, computer scientist, and educator best known for co-developing [2] the BASIC programming language in 1964 with Thomas E. Kurtz.
1829: First practical steam fire engine invented by John Braithwaite the younger (1797–1880). 1834: The Hansom cab, a type of horse-drawn carriage, invented by Joseph Hansom (1803–1882). 1868: First traffic lights (manually operated and gas-lit) installed outside London's Houses of Parliament; invented by John Peake Knight (1828–1886).
Gregg shorthand is a system of shorthand developed by John Robert Gregg in 1888. Distinguished by its phonemic basis, the system prioritizes the sounds of speech over traditional English spelling, enabling rapid writing by employing elliptical figures and lines that bisect them.
A nephew of the general manager of the Joseph Campbell Preserve Company, he went to work there in 1897 and invented condensed soup. [1] [2] Dorrance went on to become the president of Campbell Soup Company from 1914 to 1930, eventually buying out the Campbell family. [citation needed] He turned the business into one of America's longest-lasting ...
John Wesley Hyatt (November 28, 1837 – May 10, 1920) was an American inventor. He is mainly known for simplifying the production of celluloid . Hyatt, a Perkin Medal recipient, is included in the National Inventors Hall of Fame .