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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
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 ...
1966: Spirograph This geometric drawing toy was developed by British engineer Denys Fisher and first sold in 1965. The trippy shapes made it the perfect toy for the swinging '60s.
Elevating your head while sleeping can do wonders for your congestion, Dr. Mercola says. ... (like Sudafed) may work better for you. On the other hand, if you have chest congestion and need to ...
A spirometer is an apparatus for measuring the volume of air inspired and expired by the lungs.A spirometer measures ventilation, the movement of air into and out of the lungs.
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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.
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