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- Edison's patent was an improvement on electric lamps, not the invention of them; but because of Edison’s design changes and the materials he used—such as a carbon filament—his patent allowed for an electric lamp that was reliable, safe, and practical.
www.archives.gov/milestone-documents/thomas-edisons-patent-application-for-the-light-bulbThomas Edison's Patent Application for the Light Bulb (1880)
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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.
Oct 21, 2014 · Electric lights already existed on a streetlight scale when, on this day in 1879, Edison tested the one he’s famous for. Though he didn’t come up with the whole concept, his light bulb was the...
Nov 9, 2009 · Edison and the Light Bulb. In 1878, Edison focused on inventing a safe, inexpensive electric light to replace the gaslight—a challenge that scientists had been grappling with for the last...
Apr 2, 2014 · Edison was driven to perfect a commercially practical, efficient incandescent light bulb following English inventor Humphry Davy’s invention of the first early electric arc lamp in the early...
Edison Light Bulb, 1879. Thomas Edison used this carbon-filament bulb in the first public demonstration of his most famous invention—the light bulb, the first practical electric incandescent lamp. The light bulb creates light when electrical current passes through the metal filament wire, heating it to a high temperature until it glows.
Jun 27, 2023 · The English chemist Joseph Swan, Edison knew, was hard at work on a rival light bulb. Two Canadians, Henry Woodward and Mathew Evans, had already patented an inefficient design four years...
Oct 21, 2024 · October 21, 1879. 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.
