How many times did Edison succeed in inventing the electric light?

It took Edison about 1600 times to invent the electric light. 1879 65438+1October 2 1, the electric lamp was successfully developed. For this reason, Edison experimented with nearly 1600 kinds of materials. After 45 hours of continuous use, the filament of this electric lamp was burned. This is the first lamp with wide practical value. This kind of electric lamp has many names such as "high resistance incandescent lamp" and "carbon cotton filament lamp", all of which are made of carbon cotton filament.

The tortuous process of Edison's invention of electric light;

1874, two Canadian electrical technicians applied for a patent for electric lamp: nitrogen was filled under a glass bulb to emit light on a charged carbon electrode, but the electrical technicians did not have enough funds to continue to improve the invention, so they sold the patent to Edison in 1875. Edison bought a patent to try to improve this filament.

Finally, in 1880, Edison made the carbonized bamboo filament lamp, which lasted for 1200 hours. However, the US Patent Office ruled that Edison's carbon fiber incandescent lamp was invalid. After years of litigation, Henry Goebbels won the patent, and finally Edison bought the patent from Goebbels poor widow.

In Britain, Swan sued Edison for patent infringement. Later, an out-of-court settlement was made and 1883 established a joint venture company. Swan later sold his shares and patents to Edison.