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Wooden ellipsograph (ca. 1900) now at Smithsonian Ellipsograph on display at Musée d'histoire des sciences de la Ville de Genève. An ellipsograph is a trammel of Archimedes intended to draw, cut, or machine ellipses, e.g. in wood or other sheet materials. An ellipsograph has the appropriate instrument (pencil, knife, router, etc.) attached to ...
In the past couple of days I spent some time researching the name "trammel of Archimedes", sometimes applied to the instrument for the several centuries previously and still often today called an elliptic trammel or elliptic compass (a "trammel" or beam compass is a wooden or metal rod or beam along which slide metal "trammel points", used to draw circles).
File:Brass Farey's ellipsograph dated 1817. File:Harmonograph, by Newton & Co., two pendulums on 3 legged wooden stand, extension with a sliding ball for upper end of ...
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Animation of an ellipsograph, or trammel of Archimedes, drawing an ellipse. Items portrayed in this file depicts. Trammel of Archimedes. ellipse. creator. some value.
Farey was the eldest son of John Farey Sr. (1766–1826), the geologist, and Sophia Hubert (1770–1830).He was the older brother of Joseph Farey (1796–1829), who also became a known mechanical engineer and draughtsman and member of the Institution of Civil Engineers in 1822.
A footnote in Blake (1900) "The Ellipsograph of Proclus" JSTOR 2369752: The discovery of the first property is accredited to Proclus; Chasles, "Aperçu historique," p. 49 . The well-known chuck for turning figures with elliptical cross-sections, invented by Leonardo da Vinci, is an application of the mechanism.
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