The composition invented an electric appliance to prevent radiation.

Edison only attended primary school for three months in his life, and his knowledge came from his mother's teaching and self-study. His success should be attributed to his mother's understanding and patient teaching since childhood, which made Edison, who was originally considered an imbecile, become a world-famous "king of invention" when he grew up. Edison was curious about many things since he was a child, and he liked to try it himself until he understood the truth. When he grew up, he devoted himself to research and invention according to his interest in this field. He established a laboratory in New Jersey and invented more than 2,000 kinds of things in his life, such as electric lights, telegrams, phonographs, film machines, magnetic ore separators, crushers and so on. Edison's strong research spirit made him make great contributions to improving human life style. "Waste, the biggest waste is wasting time." Edison often said to his assistant. "Life is too short to do more with less time." One day, Edison was working in the laboratory. He handed his assistant an empty glass bulb without a lampholder and said, "Measure the capacity of the bulb." He bowed his head and went to work again. After a long time, he asked, "What's the capacity?" He didn't hear the answer, turned to see the assistant measuring the circumference and inclination of the light bulb with a soft ruler, and poured the measured figures on the table for calculation. He said, "Time, time, why do you spend so much time?" Edison came over, picked up the empty light bulb, filled it with water and handed it to his assistant. He said, "Pour water into the measuring cup and tell me its capacity at once." The assistant immediately read the number. Edison said, "What a simple measurement method. Both accurate and time-saving. Why didn't you think of that? Not bad, isn't that a waste of time? " The assistant blushed. Edison murmured, "Life is too short, too short. Save time and do more! " Edison was a poor worker before becoming famous. Once, his old friend met him in the street and said with concern, "Look at this coat on you. You should get a new one. " "Is it necessary? "Nobody knows me in new york." Edison answered casually. A few years later, Edison became a great inventor. One day, Edison met that friend in the street of new york. "Oh," exclaimed my friend, "why are you still wearing this old coat? This time, I have to change a new one anyway! " "Need it to be? Everyone here already knows me. " Edison still answered casually.

Thomas Alva Edison, a great inventor, was born in Milan, Ohio on 1847. He has only received three years of formal education, and all his teachers think he is a mentally retarded student!

Edison invented his first invention-electronic voting recorder when he was only 23 years old. After that, Edison devoted himself to inventing what he expected to be easy to enter the market. Shortly after the invention of the tape recorder, Edison invented an improved automatic recorder of stock prices, which was a huge income at that time. Edison went on to make a series of other inventions. He soon became famous, famous. Perhaps his most creative invention is the phonograph, and he obtained a patent at 1877. But more importantly to the world, he invented the practical incandescent light bulb in 1879.

Edison was not the first person to invent the electric light device. As early as a few years ago, this street was illuminated by a solitary lamp. However, Edison's light bulb, together with the transmission device he invented, enabled ordinary families to use electricity for lighting. 1882, his company began to produce household electricity in new york, and since then, household electricity has spread all over the world.

Edison established the first transmission company to transmit electricity to private homes, which laid the foundation for the development of a huge industry. After all, today this kind of power supply is not just an electric light, but a series of household appliances from TV sets to washing machines. Because the electricity in the transmission network established by Edison is easy to use, it greatly promotes the application of electricity in industry.

Edison made great contributions to the development of movies, cameras and projectors. He made important improvements to the telephone (his carbon microphone greatly improved the audibility), telegraph and typewriter. His other inventions include the phonograph, mimeograph and storage battery. Edison got more than 1000 personal invention patents, which is really an incredible number.

One of the reasons why Edison's work efficiency is so amazing is that early in his career, he set up a research laboratory in Menlo Park, New Jersey, and hired a group of talented assistants to help him with his work. Since then, many industrial companies have established large-scale research laboratories, the prototype of which is Edison's laboratory. Edison's modern and well-equipped research laboratory is one of his most important inventions. Many people work together as a whole in this laboratory.

Edison was not only an inventor, but also engaged in manufacturing, and established several companies, the most important of which later became General Electric Company.

Although Edison did not have the temperament of a pure theoretical scientist, he made an important scientific discovery. In 1882, he found that in a state close to vacuum, current can pass between wires that are not in contact with each other. This phenomenon is called Edison effect, which not only has great theoretical significance, but also has important practical application, and finally leads to the establishment of vacuum tube and electronic industry.

Edison suffered from severe deafness for most of his life, but his efforts and perseverance completely made up for this defect. Edison was married twice.

His first wife died when he was young. Both wives gave birth to three children. He died in Orange, New Jersey on 19 1.

It is generally believed that Edison was a genius, the greatest invention genius ever. Looking at his practical invention, a sense of awe arises spontaneously. Although most of them may have been made by others within 30 years, if we look at his inventions separately, we will find that none of them are true. For example, incandescent lamps, although widely used, are not an irreparable gap in modern life. In fact, fluorescent lamps are made by completely different principles. If there were no incandescent light bulbs at all, our daily life would not be very different from now. Indeed, before the advent of electric light, people generally thought that candles, oil lamps and gas lamps were quite satisfactory light sources.

Of course, the phonograph is a great musical instrument, but people think that it is eclipsed by the changes that radio, television or telephone bring to our daily life. In recent years, completely different recording methods have appeared, such as tape recorders. Today, if there is no phonograph or tape recorder at all, it is relatively irrelevant. Many of Edison's patents are related to the reform of equipment that others have invented, and they are quite useful, although this reform is beneficial.

Although none of Edison's inventions stand out from the crowd, it should be remembered that he invented more than one, but 1000 kinds. It is for this reason that I ranked Edison ahead of gagel's Mo Marconi and Alexander Graham Bell.