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Spirograph is a geometric drawing device that produces mathematical roulette curves of the variety technically known as hypotrochoids and epitrochoids. The well-known toy version was developed by British engineer Denys Fisher and first sold in 1965.
A pneumograph, also known as a pneumatograph or spirograph, is a device for recording velocity and force of chest movements during respiration. Principle of operation [ edit ]
Among his other patents were the parabolagraph, the spirograph, the electric bell used in trains, and an electric arc lamp of his own design. [5] Abakanowicz published several works, including works on statistics , integrators and numerous popular scientific works, such as one describing his integraph .
Between 1962 and 1964 he developed various drawing machines from Meccano pieces, eventually producing a prototype Spirograph. Patented in 16 countries, it went on sale in Schofields department store in Leeds in 1965. A year later, Fisher licensed Spirograph to Kenner Products in the United States. In 1967 Spirograph was chosen as the UK Toy of ...
Spirograph images are hypotrochoids, with curved "sides". Polytopes (like the runcinated 6-simplexes) though have straight line segments. Andy Dingley 15:51, 27 December 2016 (UTC) I did overlook that difference. Thanks. My parents bought me a Spirograph round 1972. 83.85.143.141 16:11, 27 December 2016 (UTC)
The first shipment of Spirograph arrived just before Christmas in 2012. The Spirograph (along with Kahootz' Lite-Brite) was exhibited at the 2013 Sweet Suite 13 [4] show in Chicago, Illinois and the 2014 American International Toy Fair in New York City, New York. [5] Since then, Kahootz Toys has expanded and released numerous new products and ...
For design inspiration, we put together 60 free, printable pumpkin carving stencils. With so many to choose from, there’s a stencil to fit every carver’s vision.
As a young man in 1827 he had developed a so-called "Speiragraph", an early prototype for the spirograph. He evidently continued on with experiments and inventions, and on 27 February 1860 received British patent no. 537 for 28 monocular and stereoscopic variations of cylindrical stroboscopic devices (see zoetrope ). [ 7 ]