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The emergence of electricity has made a leap in human productivity, and the emergence of incandescent lamps has also created the history of human beings using electricity for lighting.
It is generally believed that the incandescent lamp was invented by the American Thomas Edison. In fact, many other people also made a lot of contributions to the invention of the electric lamp before Edison. In 1801, a British chemist, David, energized platinum wire to emit light. He also invented the electric candle in 1810, using an arc between two carbon rods to illuminate. In 1854, Henri Goebbels used a carbonized bamboo thread, which was energized and glowed under a vacuum glass bottle. His invention today appears to be the first practical incandescent lamp. The light bulb he tested at that time could last for 400 hours, but he did not apply for a design patent in time.
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In 1850, the Englishman Joseph Wilson Swan began to study the electric light. In 1878, he obtained a British patent for a light bulb powered by carbon filaments in a vacuum, and began to establish a company in the United Kingdom to install electric lights in each home. In 1874, two electrical technicians in Canada applied for a patent for an electric light.
They are filled with helium gas under glass bubbles and glow with energized carbon rods. But they didn't have the financial resources to continue developing the invention, so they sold the patent to Edison in 1875. After Edison bought the patent, he tried to improve the filament he used. In 1879, he switched to carbon filaments to make light bulbs, which successfully lasted 13 hours. In 1880, after experimenting with 1,600 kinds of materials, Edison finally succeeded in making the world's first incandescent lamp with a filament made of carbon filament, which was successfully maintained in the laboratory for 1,200 hours. Since then, mankind has entered the era of electric lighting.
