It is because of Edison's improvement that ordinary families can use light bulbs. It can be said that his improvement of the light bulb is of great significance.
Born in Germany, Henri Goebbels was the inventor of precision machinery. 1848 immigrated to the United States. 1893, General Electric sued three light bulb companies in which Henry Goebbels was a consultant, accusing them of infringing Edison's patent. Henry Goebbels said that he invented the light bulb in 1854.
At first, the light bulb was an arc lamp consisting of 2000 batteries and two carbon rods. But because its light is too strong, it is not suitable for home use at all. Then Edison experimented with 1600 kinds of materials, and finally invented the incandescent lamp. This kind of incandescent lamp is cheap and good, and usually lasts for 200 hours.
The invention process of electric light:
Edison made a detailed test plan after carefully summarizing the previous failure experience in manufacturing electric lamps, and conducted experiments in two aspects: one was to classify and test more than 600 different heat-resistant materials of/kloc-0; The second is to improve the vacuum pumping equipment to make the bulb have a high vacuum degree. He also studied the new generator and circuit shunt system.
Edison tested 1600 kinds of heat-resistant luminescent materials one by one, but the linear energy of platinum wire is good, but the price of platinum is amazing, so we must find a more suitable material to replace it. 1879, Edison finally decided to use carbon filament after many experiments. He sprinkled carbon powder on a piece of cotton silk, bent it into a horseshoe shape, heated it in a crucible, made it into a filament and put it in a light bulb.
Then the air in the light bulb is pumped out by an air pump, and the light comes on, which can be used continuously for 45 hours. In this way, the first batch of carbon filament incandescent lamps in the world came out. 1879 On New Year's Eve, Lopark Street where Edison Electric Company is located is brightly lit.
In order to develop electric light, Edison often worked in the laboratory for more than ten hours a day, and sometimes experimented for several days. After he invented carbon fiber, he experimented with more than 6000 kinds of plant fibers. Finally, he chose bamboo filaments, burned them in a high-temperature closed furnace, and then processed them to obtain carbonized bamboo filaments, which were put into the light bulb, thus improving the vacuum degree of the light bulb again, and the light bulb could be continuously lit for 1200 hours. The invention of electric light once caused natural gas stocks to plummet 12% in three days.
After Edison, 1909, American Ke Renqi invented tungsten wire instead of carbon wire, which greatly improved the efficiency of electric lamp. Since then, electric lamps have leapt to a new level, and fluorescent lamps, iodine tungsten lamp and other lamps have mushroomed on the lighting stage.
Reference to the above content: Baidu encyclopedia-light bulb