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April 2
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April 2 is the 92 nd day of the year (93 rd in leap years) in the Gregorian calendar. There are 273 days remaining until the end of the year.
Contents |
Technology
- 1889 - Charles Martin Hall receives a patent for an electrolytic method of producing aluminum cheaply, bringing the metal into wide commercial use in products including wheelchairs and portable ramps (and some bowling ramps). [1] [2]
Sports
![Wheelchair bowling ramp, invented by Harold J. Steel].](/index.php/Image:Bowling_ramp_patent.jpg)
- 1963 - Harold J. Steel is granted the first U.S. patent(3,083,967) for a wheelchair bowling ramp.[3]
Births
- 1824 - Thomas Rhodes Armitage, founder of the Royal National Institute of the Blind (RNIB). [4]
- 1877 - Carl L. Alsberg - American Chemist. Alsberg was the 2nd and youngest Commissioner of the U.S. Food and Drug Administration ( December 16, 1912 - July 15, 1921) then known as the Bureau of Chemistry.[5]
Deaths
- 1872 - Samuel F. B. Morse, inventor of the telegraph dies. To send messages over the telegraph, he developed a code of dots and dashes to represent each letter. Today, some people with disabilities use one or two switches and “Morse code” to type on a computer. [6]
References
- ↑ Charles Martin Hall. National Inventors Hall of Fame. Accessed March 7, 2008.
- ↑ Manufacture of Aluminium. U.S. Patent #400,665. April 2, 1889.
- ↑ Steel Sports Aparatus. U.S. Patent 3,083,967. April 2, 1963.
- ↑ Thomas Rhodes Armitage - RNIB's Founder. Royal National Institute of the Blind. Accessed March 10, 2008.
- ↑ "Carl L. Alsberg, M.D. U.S. Food and Drug Administration. Accessed on June 2, 2008.
- ↑ Samuel F. B. Morse. Locust Grove, the Samuel Morse historic site. Accessed March 13, 2008.
