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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.While spirometry measures respiratory rate and other markers of respiratory health via analysis of the airflow from the lungs during inhalation and exhalation, pneumography measures the respiratory rate via chest motion.
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 ...
The epitrochoid with R = 3, r = 1 and d = 1/2. In geometry, an epitrochoid (/ ɛ p ɪ ˈ t r ɒ k ɔɪ d / or / ɛ p ɪ ˈ t r oʊ k ɔɪ d /) is a roulette traced by a point attached to a circle of radius r rolling around the outside of a fixed circle of radius R, where the point is at a distance d from the center of the exterior circle.
Kahootz' initial product offerings were Spirograph and Pomz. [2] In a 2013 interview, [3] Cass stated that they brought back the Spirograph because they saw an opportunity for success in the nostalgia market and felt that it would do well. The first shipment of Spirograph arrived just before Christmas in 2012.
Thanks for that information. I looked it up and included sourced information in the article. Interesting. SilkTork Tea time 15:56, 17 July 2011 (UTC) My brother and I would spend hours playing with our MAGIC PATTERN drawing set in the late 1949-1951. It was identical to the much later SpiroMatic and Spirograph toys.
Image Name First described Equation Comment circle = The trivial spiral Archimedean spiral (also arithmetic spiral): c. 320 BC = + Fermat's spiral (also parabolic spiral): 1636 [1]
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 .