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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
Spirometry (meaning the measuring of breath) is the most common of the pulmonary function tests (PFTs). It measures lung function, specifically the amount (volume) and/or speed (flow) of air that can be inhaled and exhaled.
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 ...
Specifically, the Spirograph can draw hypotrochoids and epitrochoids. The Pittsburgh Steelers ' logo, which is based on the Steelmark , includes three astroids (hypocycloids of four cusps ). In his weekly NFL.com column "Tuesday Morning Quarterback," Gregg Easterbrook often refers to the Steelers as the Hypocycloids.
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 ...
Spirograph, originally marketed as a "creative children's toy" in the 1960s, provided colored ballpoint pens as part of its package. Some of the most famous artists of the 20th century have utilized ballpoint pens to some extent during their careers. Andy Warhol and Alberto Giacometti both used ballpoints within their artwork in the 1950s.
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.