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- Trammel_of_Archimedes abstract "A trammel of Archimedes is a mechanism that traces out an ellipse. It consists of two shuttles which are confined ("trammelled") to perpendicular channels or rails, and a rod which is attached to the shuttles by pivots at fixed positions along the rod. As the shuttles move back and forth, each along its channel, the end of the rod moves in an elliptical path. The semi-axes a and b of the ellipse are the distances between the end of the rod and the two pivots.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 the rod. Usually the distances a and b are adjustable, so that the size and shape of the ellipse can be varied.The history of such ellipsographs is not certain, but they are believed to date back to Proclus and perhaps even to the time of Archimedes.Wooden versions of the trammel of Archimedes have been produced also as toys or novelty items, and sold under the name of nothing grinders or do nothing machines. In these toys the drafting instrument is replaced by a crank handle, and the position of the sliding shuttles is usually fixed.".
- Trammel_of_Archimedes thumbnail Archimedes_Trammel.gif?width=300.
- Trammel_of_Archimedes wikiPageExternalLink WonkyTrammel.pdf.
- Trammel_of_Archimedes wikiPageExternalLink 3375895909.
- Trammel_of_Archimedes wikiPageExternalLink 4306598.html.
- Trammel_of_Archimedes wikiPageExternalLink Do_nothing_Machine.
- Trammel_of_Archimedes wikiPageExternalLink A_Jig_for_Drawing_or_Cutting_Ellipses.html.
- Trammel_of_Archimedes wikiPageExternalLink watch?v=GzQfQa8uv6M.
- Trammel_of_Archimedes wikiPageID "24365561".
- Trammel_of_Archimedes wikiPageRevisionID "590648285".
- Trammel_of_Archimedes hasPhotoCollection Trammel_of_Archimedes.
- Trammel_of_Archimedes subject Category:Conic_sections.
- Trammel_of_Archimedes subject Category:Mechanisms.
- Trammel_of_Archimedes subject Category:Novelty_items.
- Trammel_of_Archimedes subject Category:Traditional_toys.
- Trammel_of_Archimedes type Abstraction100002137.
- Trammel_of_Archimedes type Attribute100024264.
- Trammel_of_Archimedes type ConicSection113872975.
- Trammel_of_Archimedes type ConicSections.
- Trammel_of_Archimedes type Figure113862780.
- Trammel_of_Archimedes type Item106482401.
- Trammel_of_Archimedes type NoveltyItems.
- Trammel_of_Archimedes type Part113809207.
- Trammel_of_Archimedes type PlaneFigure113863186.
- Trammel_of_Archimedes type Relation100031921.
- Trammel_of_Archimedes type Shape100027807.
- Trammel_of_Archimedes comment "A trammel of Archimedes is a mechanism that traces out an ellipse. It consists of two shuttles which are confined ("trammelled") to perpendicular channels or rails, and a rod which is attached to the shuttles by pivots at fixed positions along the rod. As the shuttles move back and forth, each along its channel, the end of the rod moves in an elliptical path.".
- Trammel_of_Archimedes label "Ellipsographe".
- Trammel_of_Archimedes label "Ellipspasser".
- Trammel_of_Archimedes label "Trammel of Archimedes".
- Trammel_of_Archimedes label "Эллипсограф".
- Trammel_of_Archimedes sameAs Ellipsographe.
- Trammel_of_Archimedes sameAs Ellipspasser.
- Trammel_of_Archimedes sameAs m.07s4rl4.
- Trammel_of_Archimedes sameAs Q2597560.
- Trammel_of_Archimedes sameAs Q2597560.
- Trammel_of_Archimedes sameAs Trammel_of_Archimedes.
- Trammel_of_Archimedes wasDerivedFrom Trammel_of_Archimedes?oldid=590648285.
- Trammel_of_Archimedes depiction Archimedes_Trammel.gif.
- Trammel_of_Archimedes isPrimaryTopicOf Trammel_of_Archimedes.