What is Edison's best invention?

Edison and his invention (1) Synchronous transmitter. In the early days, the telegraph could only transmit one message at a time and could not exchange signals at the same time. As Edison was a telegraph technician, he began to improve the traditional transmitter and made a double transmitter. In 1874, he developed a quadruple transmitter, that is, a synchronous transmitter. At that time, before the development of radio, synchronous transmitter was a major breakthrough. (2) Improving the telephone We all know that the modern telephone was invented by Bell. In fact, the telephone can receive and speak clearly, thanks to Edison's repeated experiments, breaking through the traditional pattern and making a toner microphone, which improved the sensitivity, volume and receiving distance of the telephone in one fell swoop. Otherwise, we will often say hello when we call now! Hey! I can't hear you. I can't hear you clearly. (3) The phonograph One night in December, 1877, the staff of Mengluoyuan Laboratory trembled slightly, not because of the cold, but because they heard that the phonograph left a sound for the first time. This great invention needs no more introduction, and everyone can understand how wide its application is. The French government also awarded Sir Edison the title! Later, Edison improved the phonograph many times until the drum type was changed to bakelite turntable type. It was not just a year or two, but after decades of continuous improvement! (4) Electric Light-Messenger of Light In the early 19th century, people began to use gas lamps (gas lamps), but gas was supplied by pipelines. Once it leaked or blocked, it was very easy to have an accident, and people were very enthusiastic about the reform of lighting. In fact, Edison set himself an impossible task: besides improving lighting, he also had to create a power supply system. So he and his partners in Mengluo Garden worked tirelessly for more than 1,6 experiments on heat-resistant materials and more than 6 kinds of plant fibers before they made the first carbon filament light bulb, which could burn for 45 hours at a time. Later, on this basis, he constantly improved the manufacturing method, and finally introduced a bamboo filament light bulb that can ignite for 12 hours. In the mid-198s, Edison's electric light career was successful, which brought him greater reputation than any previous achievements. Before the mid-198s, he made few mistakes. After that, despite his great achievements, failures were common. One of Edison's most commendable behaviors is that he criticized alternating current, saying that it has side effects and may cause death and injury, but he didn't specify it. Therefore, some people say, "it is very contradictory that a person like him who has made many inventions himself should attack others' new inventions." He opposed the use of alternating current in favor of direct current, so he lost in a fierce and stubborn debate. In this respect, it reflects Edison's stubborn and old-fashioned shortcomings gradually bred after he became a celebrity. (5) Copier At first, Edison invented paraffin paper, which was only widely used in the packaging materials of food and candy. Later, he tried to carve the outline of words on the paraffin paper to form a paraffin lettering paper plate, put a white paper under the paper plate, and then rolled it with an ink roller from the lettering paraffin paper. A wonderful thing happened, and clear handwriting appeared on the white paper. After many improvement experiments, in 1876, Edison began to mass-produce the copier he invented, and all of a sudden, institutions, schools, institutions and groups all adopted this kind of stencil mimeograph. Because Edison's copier is very popular and popular all over the world, Edison deeply realized that he should invent things that people generally and deeply need. Supplement to the Respondent of the Prosecution 29-12-7 15: 25 On October 11th, 1868, he invented the "voting counter" and obtained the first patent right in his life. In October 1869, he established "Pop-Edison Company" with friends. In 187, he invented the universal printing press and granted the patent right, which won 4, US dollars. Set up its own manufacturing plant in new york. From 1872 to 1876, he invented the electro-animation electro-telegraph, the automatic recoding telegraph method, the double and quadruple telegraph method, and manufactured the waxed paper carbon resistor. In 1875, the acoustic analysis resonator was invented. In 1876, a laboratory-the first industrial research laboratory-was established in Monroe Park, New Jersey. It is the founding of the modern concept of "research group". Invent the carbon stick microphone. Apply for a patent for automatic telegraph recorder. In 1877, the telephone invented by Bell was improved in Monroe Park and put into practical use. Obtained three patents: piercing pen, pneumatic stylus and ordinary stylus. On August 2th, he invented the phonograph, which proved to be Edison's favorite project. In 1878, Edison claimed to solve the problem of electric lighting. The Royal Society held a phonograph exhibition. Improve the phonograph, design microphones, loudspeakers, aerial speakers, sound engines, tuning engines, microcalorimeters, taste testers, etc. On February 19th, he was granted a patent for the phonograph. In July, I went to Wyoming with Professor Parker from the University of Pennsylvania to observe the total solar eclipse, and measured the temperature around the sun with his invented thermometer. In August, I returned to Monroe Park and re-engaged in scientific research experiments. Britain approved Edison's patent application for "recorder". Visit william wallace, Connecticut in September. Start research on the invention of electric light. On October 5th, a patent application for platinum wire "electric lamp" was filed. From 1879 to 188, after thousands of setbacks, the high-resistance incandescent lamp was invented. Improved generator. Design new current distribution method, circuit alignment and calculation method. Invent the electric lamp holder and switch. Invented magnetic ore separation method. On August 3th, 1879, Edison and Bell demonstrated their telephone devices in the town hall of Saratoga Creek. As a result, Edison's telephone was clear in Bibel. On October 21st, a high-resistance incandescent lamp was invented, which was continuously lit for 4 hours. Apply for a patent for carbon filament lamp on November 1st. On December 21st, new york Express reported Edison's incandescent electric lamp. On December 25th, 3 visitors from new york were given a public electric light show in Menlo Park. In 188, he studied helicopters. Obtain a patent for the invention of electric light. And a magnetic ore sieve is made. On January 28th, the patent of "Power Transmission and Distribution System" was put forward. On February 18th, Scripps Monthly published the article Edison's Electric Light, which officially published the invention of electric light. In May, the first "Columbia" ship illuminated by electric lights was successfully tried. In December, new york Edison Electric Lighting Company was established. In 1881, the headquarters of new york Fifth Avenue was established. Set up an incandescent lamp factory in new york. Set up manufacturers of generators, underground wires and electric lamp parts. Test the tram in Monroe Park. In 1882, the current three-wire distribution system was invented. Apply for 141 patents. The first central factory was established on September 4th. At the end of December, more than 15 small power stations were established in all parts of the United States. On may 23, 1885, a patent for wireless telegraph was filed. From 1887 to 189, the cylinder phonograph was improved, and more than 8 patents on phonograph were obtained. Engaged in the manufacture and sale of phonographs, records, voice recorders, etc. In 1888, the gramophone was invented. In 1889, he participated in the Paris Centennial Exposition. Invented many kinds of electric railways. Complete the motion picture machine. Edison designed large stone crusher and grinder from 189 to 1899. I personally directed the large-scale development of iron ore by new methods in Ogden mine. In 1891, he invented the "Edison concentrator" and started his own mining business. Obtained the patent of "Movable Film Projector". On May 2th, the first successful moving film mirror was shown to the public at Edison Laboratory in West Orange, New Jersey. In 1893, the world's first film "studio" was established in the courtyard of Edison's laboratory. On April 14th, 1894, the first movable film projector cinema was opened in new york. On April 23rd, 1896, the film was shown for the first time in the Concert Hall of Koster-Byell, new york, which was warmly welcomed by the public. In 192, a new type of battery was used to test the vehicle power, with a journey of 5, miles, and it can walk 1 miles every time it is charged, which was successful. In 193, Edison's company produced the first feature film Train Robbery. In 199, a decade-long battery research was finally successful. Make a fax telegram. Obtained the design patents of raw material machine, fine grinding machine and long kiln. From 191 to 1914, the disc phonograph was completed without damaging records and diamond records. Complete the sound film machine. In 191, the "disc record" was invented. In 1912, the "talking film" was invented. Developed into a phonograph. In 1914-1915, the comprehensive manufacturing method of carbonic acid was invented, and the phonograph and the teleprompter were combined as remote writing machines, so that one party's telephone could automatically record the other party's speech. Self-made benzene, indigo oil, etc. From 1915 to 1918, as many as 39 inventions were completed, among which the most famous were torpedo mechanical devices, flamethrowers and underwater periscope. In 1927, a long record was completed. In 1928, rubber was successfully extracted from weeds.