/kloc-at the beginning of the 0/9th century, people began to use gas lamps, but gas was supplied by pipelines. Once it leaks or is blocked, it is very prone to accidents, and people are very eager for the reform of lighting. 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 bamboo filament light 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.

185 1 Textile machinery exhibited in the first World Expo

1862 sewing machines exhibited at the London World Expo.

1862 The first manual washing machine was exhibited at the London World Expo.

1893 The first typewriter exhibited at the Chicago World Expo.

At the 1876 Philadelphia World Expo, Bell, the inventor of the telephone, was conducting the first telephone conversation experiment in the world.

1888, Hysmans wanted to use the letter "K" when naming its film products. Hysmans thinks that the word "k" can give people a strong feeling. Coincidentally, the click of the camera shutter next to it inspired Hysmans. So "Kodak", a name beginning with the first and last "K", was born. Hysmans chose yellow as the packaging color of the product, which he thought reflected strength and brightness.

1889, Hysmans coated photographic emulsion on the photographic film of celluloid strips, which not only facilitated the shooting of long-term moving images, but also made it possible to display these images.

1889 During Edison's visit to the Paris World Expo, he saw the continuous display photo device invented by French photographer Marley and the new photographic film invented by Hysmans at that time, so he invented the film machine by using the persistence of human vision.

1893 At the World Expo in Chicago, USA, Miss Kodak, wearing a yellow advertising costume, became the most beautiful scenery of the Expo, just like Kodak film. Kodak products have become synonymous with photographic equipment. Kodak's advertising slogan designed by Eastman, "You press the shutter and everything is handed over to Kodak", is a household name and widely circulated. Kodak became a world film giant in one fell swoop. Edison once said: "At the Chicago World Expo in 1893 (these films shown by movable film projectors), it attracted a large audience. We didn't notice it at first. Later, we found that two British people who were interested in this exhibition learned that I ignored the patent application overseas and took the opportunity to build an independent factory for mass production. "

19 14 Eastman Kodak Company invented the color photographic plate making method. Kodak color film was born in 1923.

You press the shutter "Kada" and leave everything to "Kodak". Kodak's slogan and products in Expo 100 years are still in the world today: golden and bright.

Edison, the "king of inventions", created countless inventions in his life. He left a lot of precious wealth for mankind and built a stage for him to show his skills at the World Expo.

1877 One night in February, the staff of Mengluoyuan Laboratory trembled slightly, not because of the cold, but because they heard the phonograph leave 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 made many improvements to the phonograph until the drum was changed to a bakelite turntable. This is not a year or two, but after decades of continuous improvement!

Edison, the "king of inventions", created countless inventions in his life. He left a lot of precious wealth for mankind and built a stage for him to show his skills at the World Expo.

Television is the product of modern science and technology, and it is also one of the fastest electronic products. Nowadays, I don't know which generation of TV sets are sitting in people's homes. However, as a new technology product, TV made its debut at the World Expo not far away. It was at the World Expo held in new york on 1939 to commemorate the 50th anniversary of the inauguration of Washington, the founding father of our country.

The theme of this World Expo is "Tomorrow's World and Construction". Despite the economic depression after World War I, 45 million people from 64 countries and regions came to participate in exhibitions and visits. The TV sets, tape recorders, nylon, plastic products and other products on display at the meeting are refreshing, thus igniting people's hopes for a new life. The old is over, and the world will be better tomorrow.

1886, karl benz invented the first tricycle without horse-drawn, and obtained the "automobile manufacturing patent". This year is considered as the birth year of the automobile. 1889 The first gasoline-powered car manufactured by Mercedes-Benz was exhibited at the Paris World Expo, which opened the prelude to the automobile era.

190365438+February 17, this is a day in history. On this day, the Wright brothers in the United States achieved the first powered flight in human history. This plane was exhibited at the World Expo in St. Louis on 1904.

Nylon stockings, a new material, were first exhibited at 1939 new york World Expo.

1893, when an engineer named George Felix erected the giant Ferris wheel in Chicago, the venue of the World Expo, he didn't expect that this large turntable, which could accommodate 1440 people at the same time, would attract so many people's attention and enthusiastic participation, let alone make a bold attempt to dedicate one of the three elements of the World Expo: cultural performances.

1939 robots exhibited at new york World Expo.

1893 astronomical telescopes exhibited at the Chicago World Expo.

At the Brussels 1958 World Expo, the Soviet Union showed their artificial earth satellite model.

1934 freezer displayed by General Electric Company of the United States.

(This article Source: Expo official website)