Thomas Edison and the "first" light bulb
In 1878, Thomas Ed Dyson began serious research to develop practical incandescent lamps, and on October 1, 1878, Edison filed his first patent application for the "Improvement of Electric Lights." However, he tested several types of materials for metal fibers to improve the original design, and by November 4, 1879, he had filed another U.S. patent for an electric lamp using a "carbon filament or strip wrapped and attached ... for platinum". Contact wire. "
Edison bulb |
Thomas Edison |
Although the patent described several methods of making carbon filament, it used "cotton and linen threads, pieces of wood, various documents," but several months after the patent was granted, Edison and his team discovered that carbon bamboo fibers lasted more than 1,200 hours. Can survive.
This invention literally led to the production of light bulbs, and in 1880 Thomas Edison's company, the Edison Electric Light Company, began marketing their new product.
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