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For example, a 10 cm (3.9 in) circular would have a maximum precision approximately equal to a 31.4 cm (12.4 in) ordinary slide rule. Circular slide rules also eliminate "off-scale" calculations, because the scales were designed to "wrap around"; they never have to be reoriented when results are near 1.0—the rule is always on scale.
A slide rule scale is a line with graduated markings inscribed along the length of a slide rule used for mathematical calculations. The earliest such device had a single logarithmic scale for performing multiplication and division, but soon an improved technique was developed which involved two such scales sliding alongside each other.
The second, outer, cylinder is printed with the slide rule's primary logarithmic scale in the form of a 50-turn helix 12.70 metres; 500 inches (41 ft 8 in) long with annotations on the scale going from 100 to 1000. A brass tube with a mahogany cap at the top is a slide fit into the first cylinder.
Otis Carter Formby King (1876–1944) was an electrical engineer [1] in London who invented and produced a cylindrical slide rule with helical scales, primarily for business uses initially. The product was named Otis King's Patent Calculator , and was manufactured and sold by Carbic Ltd. in London from about 1922 to about 1972.
The other side is a circular slide rule. Extra marks and windows facilitate calculations specifically needed in aviation. Electronic versions are also produced, resembling calculators, rather than manual slide rules. Aviation remains one of the few places that the slide rule is still in widespread use. Manual E6-Bs/CRP-1s remain popular with ...
[3] In 1929 Hayner returned to Columbia University. She taught in the Ernest Kempton Adams Laboratory and specialized in teaching the advanced laboratory class. [2] She later directed the laboratory until her retirement in 1966. [1] [3] In 1937, Hayner designed and constructed a circular slide rule in Braille. The construction took over 100 ...
3 (Pledger v Janssen, et al.) APPEARANCES: (Continued) WEIL, GOTSHAL & MANGES, LLP BY: DIANE P. SULLIVAN, ESQUIRE ALLISON BROWN, ESQUIRE (admitted pro hac vice) 301 Carnegie Center, Suite 303 Princeton, New Jersey 08540 T: 609-986-1100 F: 212-310-8007 E-mail: diane.sullivan@weil.com E-mail: allison.brown@weil.com Counsel for Defendant Janssen 4
The International Slide Rule Museum (ISRM) is an American museum dedicated to the preservation and display of slide rules and other mathematical artefacts. Established in 2003 by Michael Konshak, who serves as its curator, [3] [4] the museum houses a collection of slide rules from divers manufacturers and time periods, showcasing the evolution and importance of these instruments in the history ...