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As of 2009 he was active at age 85 and enjoyed sailing with his wife Carolyn. Associate in Mathematics, Columbia University, New York City. Collector and contributor of European slide rule scans for the ISRM galleries. His work on understanding Charles Babbage's calculating engines is Allan Bromley's greatest legacy.
The Italy gallery is comprised mostly of his collection . The October-December 2000 issue of the IEEE Annals of the History of Computingwas dedicated to him for the quality of his research on this subject.
Colin Barnes started his working life as an apprentice in the shipyard of Vosper Ltd. He moved to the West Indies where he was the manager of a small shipyard before setting up his own construction and design business specialising in steel framed buildings and private housing. The slide calculator is an unusual single-purpose device for determining Intelligence Quotient (IQ) given a youngster's physical age and his mental age (apparently determined by a standardized test). The son of the English rule maker, Zachariah Becher I, began making rules in New York in 1821 and was joined by his brother, William, in 1825. Around 1843, manufacturing of rules moved to New Jersey and the firm went by the name Belcher & Bros. Hnas writes: "I collect early electronic calculators since beginning of 2001. He earned a BS degrees in Chemistry from Williams College in 1942/43 and another in Chemical Engineering from John Hopkins University in 1954.
A main focus of the collection is Electro slide rules and rules that have hyperbolic functions. After marrying a California wife, they moved to Salt lake City, Utah. From 1958, in a non-teaching capacity, he turned to writing full-time. An engineer who founded of TECNOSTYL in 1948, a slide rule and technical instrument company in Milano, Italy. Carl was a son-in-law of the K&E founder married to Louise Keuffel.
Although he used many index marks to help correct errors in the expansion of the film, the medium was hard to control. Member of UKSRC and contributing author to The Gazette and Slipstick. Beatley was a 1916 Harvard graduate and served in the U. Army from June 1917 to January 1919, attaining the rank of first lieutenant. The company was later renamed National Rechenwalze. Co-authored US Patent #1945140 Surgical Electrode issued Jan 30, 1934. Member of the Dutch Circle of Historical Calculating Instruments (KRING - Rekenlinialen). It is believed that Boos operated Acu-Design for a short time, independant of the Acu-Rule Company, to provide scale artwork to other slide rule manufacturers.
Frustrated with not finding a solution to this problem, he contemplated an alternative to the slide rule and the rest became history. Atanasoff II, Boulder, CO) Scans of his three slide rules at ISRM were provided by the Iowa State University Library, Atanasoff Archives. Colin Barnes - (1940-2016) Fordham, Cambridgeshire - England. Helped put together the display at the National Museum of Computing at Bletchley Park. On returning to Harvard he earned his doctorate in education in 1923, taught at Harvard, and rose to associate professor before leaving in 1933 to become president of Simmons College, a Boston technical school for girls. It was during the writing of his thesis in 1922 that he copyrighted the design of the Beatley I-Q Slide Rule, the year before he earned his doctorate. His slide rule book is downloadable in the ISRM library. His collection at Calculator Museum is focused on early Electronic calculators as well as slide rules. Bernard (Bernie) Carter Boykin - (1921-2011 ) Born in Ruxton, Maryland.
His unique design using a thin blade to keep the arms aligned when closed. In the 1920s, Ahrend started to sell office furniture and soon saw a rapid increase in the numbers sold. Mentioned as an elected student in the Journal of the Institution of Electrical Engineers, Volume 40 (1907-1908) page 411. Retired professor of didactics of mathematics, Ludwigsburg University of Education Germany. Author of Science fiction novels as well as math books including An Easy Introduction to the Slide Rule (1965).
The only other Maker that used this technique was Thomas Heath. Member of the Oughtred Society, Graduated with a Electro-Technology Diploma from the SA Institute of Technology in 1970, using a slide rule (Thornton P221) and with a Engineering Degree in 1979 using a electronic calculator (HP25). The initial furniture was all made of wood, but it was not long before steel furniture was added to the range. After the war he founded the Amsterdam Trade association in 1947. Ahrend were no instrument makers as can be seen in the ISRM galleries where rebranded Ahrend slide rules were made in Japan and Germany. Publications about mechanical calculators found at Museum mechanischer Rechenmaschinen and some about slide rules. Slide rules were mentioned in many of his futuristic 'Robot' novels.