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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 ...
The title block (T/B, TB) is an area of the drawing that conveys header-type information about the drawing, such as: Drawing title (hence the name "title block") Drawing number; Part number(s) Name of the design activity (corporation, government agency, etc.) Identifying code of the design activity (such as a CAGE code)
Joseph John O'Connell (1861–1959), U.S. – number of inventions relating to telephony and electrical engineering; Theophil Wilgodt Odhner (1845–1903), Sweden/Russia – the Odhner Arithmometer, a mechanical calculator; Paul Offit (born 1951), U.S., along with Fred Clark and Stanley Plotkin, invented a pentavalent Rotavirus vaccine
In 1956, a large property in Beaverton became available, and the company's employee retirement trust purchased the land and leased it back to the company. [10] Construction began in 1957 and on May 1, 1959, Tektronix moved into its new Beaverton headquarters campus, [10] on a 313-acre (1.27 km 2) site which came to be called the Tektronix Industrial Park.
Jean Amédée Hoerni (September 26, 1924 – January 12, 1997) was a Swiss-born American engineer. He was a silicon transistor pioneer, and a member of the " traitorous eight ". He developed the planar process , an important technology for reliably fabricating and manufacturing semiconductor devices , such as transistors and integrated circuits .
Invented the first successful powered fixed-wing aircraft, upon which further aircraft designs, methods of flight, and aircraft control systems were based. Air conditioning: Willis Carrier [105] Battery: Alessandro Volta [106] Invented the first electrical battery, the Voltaic pile. Canning: Nicolas Appert: Chronograph: George Graham [36] [107]
Jeanne Lee (1939–2000), U.S. jazz singer; Jeanne Lee Crews (born 1940), U.S. aerospace engineer; Jeannie Cho Lee (born 1968), Korean-American Hongkonger journalist; Jeannie T. Lee, U.S. geneticist; All pages with titles beginning with Jean Lee; All pages with titles containing Jean Lee; Jeannette Lee (disambiguation)
Jean Marian Purdy (25 April 1945 – 16 March 1985) was a British nurse, embryologist and pioneer of fertility treatment. She was responsible with Robert Edwards and Patrick Steptoe for developing in vitro fertilisation (IVF); Louise Joy Brown , the first "test-tube baby", was born on 25 July 1978, and Purdy was the first to see the embryonic ...