/kloc-At the beginning of the 0/9th century, people used oil lamps and candles for lighting, but if they were not careful, there would be a fire. Edison was determined to make electric lights to bring light to mankind in order to liberate mankind from the bondage of night.
Edison invented the electric lamp and did 1500 experiments, but failed to find a suitable material for the lamp filament. After 1600 experiments with heat-resistant materials and more than 600 kinds of plant fibers, the first carbon filament was made.
The light bulb can be on for 45 hours at a time. Later, on this basis, he constantly improved the manufacturing method, and finally invented a bamboo light bulb that can ignite 1200 hours, which has been used for 30 years.
When I am studying, I often want to give up when I encounter difficulties. After reading his story, Edison's perseverance deeply touched me, letting me know that everything should not be abandoned halfway, and we must persevere and stick to the end.
Edison is not afraid of difficulties, and his perseverance is an example for each of us to learn!
How did Edison invent the electric light Edison and his assistant tried platinum several times, but this kind of platinum with high melting point prolonged the luminous time a lot, but it was not ideal to go out automatically and then emit light from time to time.
Edison saw this scarf made of cotton yarn, and an idea suddenly appeared in Edison's mind:
Yes! Cotton yarn has better fibers than wood. Can you use this material?
He quickly tore off a cotton yarn from his scarf and carefully put this carbon filament into the glass bubble, which really worked well.
Edison was very happy. He made many carbon filaments made of cotton yarn and did many experiments. The life of the light bulb was extended by 13 hours, and then it reached 45 hours.
"I hope it can open 1000 hours, preferably 16000 hours!" Edison said.
Finally, Edison finally chose bamboo. He first took out a bamboo and put it in a glass bulb. After electrifying, the bamboo filament bulb lit continuously 1200 hours!
The light Bulb dēngpào (English Bulb) was first used by Henry Goebbels in America. The most famous inventor is American scientist Thomas Alva Edison. As we all know, Edison successfully trial-produced the light bulb on June1879+1October 2 1.
In the process of development, Thomas Alva Edison carefully analyzed the gas lamp and arc lamp at that time, and his main direction was to find a heat-resistant material. It is burned to a white-hot degree by electric current, giving off hot light, and will not be broken or melted. He happened to find that cotton thread suddenly burned to ashes in the air, while carbon cotton thread glowed when put into a treated glass ball. Unfortunately, the light only lasted for a few minutes, and then it disappeared. He mistakenly gave up this experiment and tried 1600 different heat-resistant materials such as cesium, nickel, platinum (platinum) and platinum-iridium alloy, with little gain.
Thomas Alva Thomas Alva Edison resumed his research on carbon. In June+10/October of that year, he tested a carbon rod with a length of 20 cm and a diameter of 0. 15 cm, and the heat resistance time reached 5.5 hours. He constantly improved the carbonization method and pumping treatment.
lamp bulb
On the days of 1879, 10, 2 1, he used 1 carbonized cotton thread with a diameter of 0.025 cm as the filament, and the luminosity was bright and stable. Under the illumination of 4 candlelight, it was on for 45 hours, 1 hour and 2 hours. After 1 years of efforts and thousands of experiments, the long-awaited electric light was finally born.
In June 5438+10 in the same year, after Thomas Alva Edison changed to carbonized cardboard to greatly improve the life of electric lamps, the manufacturers couldn't wait to put them into production. 1880 On New Year's Eve, 3,000 people took to the streets of new york to watch this new invention. Success didn't stop Thomas Alva Edison. The next year, he made a bamboo filament lamp that could be lit continuously for 1 200 hours. It was not until 1904 that the Austrian invented the tungsten lamp, which was three times stronger than the bamboo filament lamp, that it replaced the former. Tungsten lamp has been using it since 1907.
Before the invention of the electric light bulb, it was laborious and dangerous to light a place after sunset. It must be lit with candles or torches. Although the oil lamp at that time was not bad, it always left smoke and ash.
/kloc-in the middle of 0/8th century, electrical science really developed. At that time, inventors all over the world were clamoring to invent a practical household lighting device. British inventor Swan and American inventor Edison invented the electric light bulb in 1897. There is no essential change between the modern electric light bulb and the electric light bulb invented by Edison in those years, only some parts are added.
It is generally believed that the electric light was invented by Thomas Edison, an American. However, if we make a careful textual research, another American, Henry Goebbels, invented the reliable electric light bulb with the same principle and material decades before Edison, and many people made many contributions to the invention of the electric light bulb before Edison.
How Edison invented the electric light is a great invention for mankind to conquer the night. 19th century ago, people used oil lamps and candles for lighting, which broke through the night, but still failed to completely liberate mankind from the restriction of the night. Only with the birth of the generator can we light up the world with all kinds of electric lights, turn night into day, expand the scope of human activities, win more time and create wealth for society.
It was the American inventor Edison who really invented the electric light to make it shine. He is the child of a railway worker. He dropped out of school before finishing primary school and made a living by selling newspapers on the train. Edison is an extremely diligent man. He likes to do all kinds of experiments and make many exquisite machines. He is particularly interested in electrical appliances. Ever since Faraday invented the electric motor, Edison was determined to make electric lights and bring light to mankind.
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 device 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. Only platinum wire has good curative effect, but platinum is surprisingly expensive, 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, put it in a bulb, and then pumped the air out of the bulb with an air extractor. It can be used continuously for 45 hours when the light is on. 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.
How Edison invented the electric light 150 Edison and his assistants tried platinum several times, but this kind of platinum with high melting point prolonged the luminous time a lot, but it was still not ideal to extinguish it automatically from time to time.
Edison saw this scarf made of cotton yarn, and an idea suddenly appeared in Edison's mind:
Yes! Cotton yarn has better fibers than wood. Can you use this material?
He quickly tore off a cotton yarn from his scarf and carefully put this carbon filament into the glass bubble, and the effect was really good.
Edison was very happy. He made many carbon filaments from cotton yarn and did many experiments. The life of the light bulb was extended by 13 hours, and then it reached 45 hours.
"I hope it can open 1000 hours, preferably 16000 hours!" Edison said.
Edison invented the electric light for several years. /kloc-at the beginning of the 0/8th century, people began to use gas lamps, but gas was supplied by pipelines. Once it is leaked or blocked, it is very prone to accidents. People are very enthusiastic about lighting reform. In fact, Edison set himself an impossible task: in addition to improving lighting, he must also create a power supply system.
So he and his partners in Luomeng Garden made more than 600 experiments on heat-resistant materials and more than 600 kinds of plant fibers 1600 times before they made the first carbon filament light bulb, which can burn for 45 hours at a time. Later, he constantly improved the manufacturing method on this basis, and finally introduced a tungsten filament bulb that can ignite 1200 hours.
In the mid-1980s, Edison's electric light career was successful, which brought him a greater reputation than any previous achievements. Before the mid-1980s, he seldom made mistakes. After that, despite his great achievements, failures are common. One of Edison's most commendable behaviors is that he criticized alternating current, saying that alternating current has side effects and may cause death and injury, but he did not specify. Therefore, some people say, "It is very contradictory for a person like him who has made many inventions to attack other people's new inventions. "He opposed the use of alternating current in favor of direct current, so he lost in a fierce and stubborn argument. On the one hand, it reflects Edison's stubborn and old-fashioned shortcomings after he became famous.
Did Edison really invent the electric light? The principle of electrifying metals to emit light was discovered a long time ago. 1854, Henry Goebbels used carbonized bamboo wires to electrify and glow under a vacuum glass bottle. Today, his invention seems to be the first incandescent lamp with practical value. The light bulb he tested at that time could last for 400 hours, but he didn't apply for a design patent immediately. Subsequently, experts from all walks of life have developed filament materials that are more efficient, reliable and mass-produced. In Edison's time, his greatest discovery was to use tungsten instead of carbon as filament. Later, in 1906, General Electric invented the manufacturing method of tungsten wire for electric lamps. Finally, the method of manufacturing tungsten filament at a low price was solved, and the tungsten filament bulb has been used ever since.
How Edison Invented the Tramway 200 words 65438+At the beginning of the 9th century, people used oil lamps and candles for lighting, but if they were not careful, there would be a fire. Edison was determined to make electric lights to bring light to mankind in order to liberate mankind from the bondage of night.
Edison invented the electric lamp and did 1500 experiments, but failed to find a suitable material for the lamp filament. After 1600 experiments with heat-resistant materials and more than 600 kinds of plant fibers, the first carbon filament was made.
The light bulb can be on for 45 hours at a time. Later, on this basis, he constantly improved the manufacturing method, and finally invented a bamboo light bulb that can ignite 1200 hours, which has been used for 30 years.
When I am studying, I often want to give up when I encounter difficulties. After reading his story, Edison's perseverance deeply touched me, letting me know that everything should not be abandoned halfway, and we must persevere and stick to the end.
Edison is not afraid of difficulties, and his perseverance is an example for each of us to learn!