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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.
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 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 ...
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The business owner could read the receipts to ensure that cashiers charged customers the correct amount for each transaction and did not embezzle the cash drawer. [9] It also prevents a customer from defrauding the business by falsely claiming receipt of a lesser amount of change or a transaction that never happened in the first place.
This template formats a citation to a book using the provided bibliographic information (such as author and title) as well as various formatting options. Template parameters [Edit template data] This template has custom formatting. Parameter Description Type Status Last name last last1 author author1 author1-last author-last surname1 author-last1 subject1 surname author-last subject The ...
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)
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