When the electric light was invented

October 21, 1879.

The light bulb was invented in 1854 by Henry Goebbels, a German watchmaker who immigrated to America. He is also a member of the list of tragic inventors because of these People don't know how to make their inventions public. Comrade Edison was completely different. Henry Goebbels invented a similar light bulb about 20 years later. In 1860, he made a light bulb and improved it until it was perfected in 1878. , at least later becoming Edison's business partner.

On the contrary, it was not until the eve of Henry Goebbels' death that his confrontation with Edison was legally recognized, and the latter immediately bought Henry Goebbels' patent from Goebbels' impoverished widow. right. On October 21, 1879, an American inventor finally ignited the world's first practical electric lamp through long and repeated experiments. Since then, the name of this inventor, like the lantern he invented, has entered thousands of households.

He was Edison, who was praised as the "King of Invention" by later generations. On October 21, 1879, the American inventor Edison finally ignited the world's first practical electric light through long-term and repeated trials. Since then, the name of this inventor, like the electric light he invented, has entered thousands of households. He was Edison, who was praised as the "King of Invention" by later generations. Edison began experiments to reform the arc lamp in 1877, proposing to divide the current and convert the arc lamp into a white light lamp. This test needs to be done satisfactorily.

It is necessary to find a substance that can burn to white heat to make the filament. This filament must withstand burning at a temperature of 2,000 degrees for more than 1,000 hours. At the same time, it should be simple to use, able to withstand the bumps and bumps of daily use, and the price should be low. The turning on and off of one lamp should not affect the turning on and off of any other lamp, and the relative independence of each lamp should be maintained. In order to choose this kind of lamp. This was a very bold idea at the time and required great efforts to explore and test.

As for the material used for filament, Edison first experimented with carbonized substances. After the failure, he used metal platinum and iridium high-melting point alloys to experiment with filaments. He also experimented with high-quality ore and ore seedlings***1,600 Hundreds of different tests, all failed. But by this time, he and his assistants had made great progress and knew that the incandescent filament must be sealed in a highly vacuumed glass sphere to prevent it from melting. In this way, his experiments returned to carbon filaments.

He used it day and night until the first half of 1880, but Edison's incandescent lamp experiment still had no results. One day, he tore a piece of bamboo silk tied to the edge of a banana fan in the laboratory into thin filaments, and devoted all his energy to carbonization. There were more than 6,000 carbonization experiments on plants alone. He has more than 200 experimental notebooks, totaling more than 40,000 pages, which took three years to complete. He works eighteen or nineteen hours a day. At three or four o'clock every morning, he would sleep under the experimental table with two or three books on his head.

Sometimes he slept on the stool three or four times a day, for only half an hour each time. By the first half of 1880, Edison's incandescent lamp experiments were still inconclusive, and even his assistants were discouraged. One day, he tore a piece of bamboo silk tied around a banana fan in the laboratory into thin filaments, and then carbonized it to make a filament. The result this time was better than all the previous experiments. This was Edison's earliest experiment. The invention of the incandescent electric lamp - the bamboo filament electric lamp. This bamboo filament electric lamp continued for many years. It was not replaced until the invention of tungsten filament in 1908. The alkaline storage battery that Edison began to develop after this was very difficult, and his research spirit was even more amazing.

This kind of battery is used to supply motive power. He and a selected assistant worked painstakingly for nearly ten years and experienced many hardships and failures. One moment he thought he had reached his destination, but the next moment he knew he was wrong. But Edison never wavered and started over. After about 50,000 tests and more than 150 test notes, the goal was achieved.