- Bouncy ball
A bouncy ball is a popular toy which rebounds proportionally to the amount of force used when thrown at a hard surface. A typical bouncy ball can keep around 90% of its
kinetic energy in one rebound.In the
United States , they are often sold frombulk vending machines for 25 cents or more. Thesevending machines can be found in a variety of venues fromgrocery stores , department and strip shops,malls to nearly any place that will attract a large number of people with intentions of spendingmoney . Occasionally, they are even sold inrestaurants (usually family themed ones). Since bouncy balls are often sold alongside candy, there have been instances of customers mistaking them forgumball s and almost choking on them. This has been recognized and addressed by the increase in size of some bouncy balls (some have doubled in size from the originals), yet retaining the same price. They vary from different colors and designs. They are exported fromChina toEngland andThe United States of America .uperBall
SuperBall (originally "Super Ball") is an example of a bouncy ball invented by Norman Stingley, and manufactured by
Wham-O in 1965. It is an extremely elasticball made of Zectron, which contains the synthetic rubber polymerpolybutadiene , vulcanized with sulfur at a temperature of convert|165|°C|°F and at a pressure of convert|80|atm|psi. [http://patft.uspto.gov/netacgi/nph-Parser?patentnumber=3241834] The Super Ball has a very highcoefficient of restitution . Dropped from shoulder level, a Super Ball will bounce nearly all the way back; thrown down, it can leap over a three-story building.Lamar Hunt , founder of theAmerican Football League , coined the termSuper Bowl after watching his children playing with a Super Ball, . [cite web |url=http://www.chicagotribune.com/sports/football/bears/chi-0701300052jan30,1,233400.story?track=rss&ctrack=1&cset=true |title=Legends of the Bowl |accessdate=2007-01-31 |author=Rex W. Huppke |date=2007-01-30 |format=html |publisher=Chicago Tribune |quote= Lamar Hunt, who died in December, coined the term Super Bowl in the late 1960s after watching his kids play with a Super Ball, the bouncy creation of iconic toy manufacturer Wham-O. ] .References
# Frauenfelder, Mark; Sinclair, Carla; Branwyn, Gareth; Kreth, Will editors. (1995). "The Happy Mutant Handbook: Mischievous Fun for Higher Primates". New York, Riverhead Books (Penguin Group). ISBN 1-57322-502-9, pg..134-136
Notes
Patent
* [http://patft.uspto.gov/netacgi/nph-Parser?patentnumber=3241834 Stingley, Norman H., — "Highly Resilient Polybutadiene Ball"]
External links
* [http://www.wham-o.com/default.cfm?page=ViewProducts&ProductID=22&Category=9 Wham-O]
* [http://www.superballs.com/ Superballs.com] , a tribute site
* [http://www.ideafinder.com/history/inventions/superball.htm History of the Superball]
* [http://dx.doi.org/10.1119/1.1975420 Kinematics of an Ultraelastic Rough Ball] ( [http://www.armscontrolwonk.com/file_download/34 free PDF] )
* [http://www.allball.org/ AllBall.org] Bouncy Ball Archive
* [http://www.liketelevision.net/liketelevision/tuner.php?channel=491&format=tv&theme=guide liketelevision.net] Classic B&W TV commercial for Super Ball and for Super Elastic Bubble Plastic, c. 1970
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