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Oct 21, 2024 · Thomas Edison perfects the first commercially practical incandescent light bulb. Using a filament of carbonized cotton thread, his first attempt at this design results in a bulb that lasts about 13.5 hours before burning out. He later extends the life of the bulb to 40 hours.
Oct 28, 2019 · He explores how and why the light bulb changed nearly everything about American life, economy, society, architecture, sports, entertainment and health.
- MPR News Staff
Nov 22, 2013 · By October 1879, Edison’s team had produced a light bulb with a carbonized filament of uncoated cotton thread that could last for 14.5 hours. They continued to experiment with the filament until settling on one made from bamboo that gave Edison’s lamps a lifetime of up to 1,200 hours -- this filament became the standard for the Edison bulb ...
- History and Early Research
- Commercialization
- Why Edison Won
- References
Early electric light experimentation dates back as far as 1802, with many other inventors working on the task prior to, during, and after Edison’s own work.
British physicist and chemist Joseph Swan and American inventor Thomas Edison demonstrated the first instances of commercial production of incandescent lamps. Although Swan began experimenting with incandescent light bulbs earlier, it was Edison’s design which was ultimately adopted.
Commercial production of incandescent lamps was delayed by the lack of a sufficient vacuum pump and of an efficient filament. By the late 1800s an adequate vacuum pump and sufficient filament was developed independently by Swan (1878) and Edison (1879). By 1880 both men had applied for patents for their designs, and litigation between them eventual...
"Edison Files: The Practical Incandescent Light Bulb." Edison Museum in Beaumont, Texas, n.d. 1 Apr. 2015. http://edisonmuseum.org/content3399.html. "Edison's Lightbulb." The Franklin Institute, n.d. 1 Apr. 2015. http://learn.fi.edu/learn/sci-tech/edison-lightbulb/edison-lightbulb.php. "The History of the Light Bulb." Department of Energy, 22 Nov. ...
Mar 13, 2018 · Edison was able to produce over 13 continuous hours of light with the cotton thread filament, and filed his first light bulb patent on January 27, 1880. Later, he and his researchers found that the ideal filament substance was carbonized bamboo, which produced over 1,200 hours of continuous light.
Sep 13, 2018 · Even back in the third decade of the 20th century, light-bulb manufacturing was so advanced that units had an operational life of 2,500 hours, meaning that it was years before units needed replacing.
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Inside a glass bulb that was almost a vacuum, it was able to stay lit for 13.5 hours. In the end, Edison’s "three or four month" project had taken him 14 months.
