The story of a celebrity s invention and discovery in 50 words

1.Luban. Invent the planer.

story. Luban is a carpenter and works with wood all day long. He was highly skilled, especially good at using an axe, and was able to chop wood into the desired shape in a few clicks. However, using an axe to cut the wood smooth and smooth, Lu Ban could not do it.

It is especially difficult when encountering wood with thick grain and many knots. In order to solve this problem, Lu Ban pondered during the day, and thought at night, he first made a thin axe, sharpened it quickly, and cut it much better than before, but it was still not ideal.

So, Lu Ban sharpened a small thin axe, which was covered with a piece of iron, so that only a narrow blade was exposed. This time, Lu Ban didn't cut it. He used the narrow blade to push against the wood. With a push, the wood pushes down a thin layer of wood chips.

After pushing more than a dozen times, the surface of the wood is flat and smooth, much stronger than in the past when cut with an axe. But when this thing is pushed in the hand, it is both stuck and weak. Lu Ban made another wooden seat and put it in it. Planer, and thus was born.

2. The invention of the mirror.

At that time, marriage robbery was popular in various tribes, that is, whoever was beautiful would be snatched back to be his wife. Yellow Emperor.

After taking office, he was worried that there would be civil strife among the tribes due to such robbery, so he decided to put an end to this custom.

So, the Yellow Emperor specially selected an ugly girl with an extremely ugly face, but virtuous character and gentle temperament as his wife, and named her his mother-in-law.

Under the leadership of the Yellow Emperor, the custom of "robbing marriage" in the tribe slowly disappeared.

After her mother-in-law became the wife of the Yellow Emperor, she was very virtuous and very industrious. Once, she went with her people to dig stone slabs in the mountains. At that time, the sun was at noon, and the sun was shining, and my mother-in-law suddenly noticed a shining stone chip in the stone pile.

She picked it up and saw her ugly face, she was frightened, quickly hid it, and brought it back to the palace, not daring to say it to anyone, but just secretly watching it when no one was around. Later, when she saw that the stone flakes were uneven and her face was strange, she found tools to smooth out all the stone flakes. In this way, her appearance is much clearer, but she is still the same ugly.

She thought to herself: It seems that I can't blame the stone chips because I'm ugly.

Everyone has a love for beauty. After that, my mother-in-law often took advantage of the fact that people were not paying attention, and took advantage of the stone chips to clean up and dress herself. Once, when she was photographing stone tablets, the Yellow Emperor came back and discovered the secret of her mother-in-law.

The mother-in-law told the Yellow Emperor from beginning to end the cause and effect, and asked for the Yellow Emperor's forgiveness. When the Yellow Emperor heard this, he laughed: You are not wrong, this is a great discovery for you, and you have made meritorious contributions!

Thus began the history of human use of mirrors.

The story of Cai Lun's papermaking.

In 105 AD, Cai Lun, a eunuch in the Eastern Han Dynasty, saw that the simple slips used for writing were too bulky, the silk silk was too expensive, and the existing hemp paper at that time was not suitable for writing, so he decided to make a paper that was both cheap and easy to write. Cai Lun first carefully studied the experience of the former artificial paper and knew that the principle of making hemp paper is to mash the hemp fibers and press them into thin sheets. Because the process is very simple, the paper produced is very rough.

So, after continuous testing and improvement, Cai Lun used rags, broken fishing nets, tree bark, hemp and other raw materials, added corrosive lime and other things, smashed them to make pulp, mixed them with water to dilute, and then put them in a large wooden trough, and used a thin curtain to fish out the finer pulp floating on it. After the curtain has formed a thin and uniform layer of pulp, it is dried and removed to become a white and delicate piece of paper. In this way, Cai Lun's experiment to improve papermaking technology was finally successful, and he made paper that was convenient for writing.

At this time, it was the first year of Emperor Yuanxing of the Han Dynasty, Cai Lun presented paper to the Emperor of Han and the Emperor, and was praised by the Emperor of the Han Dynasty, and the papermaking technique was widely known to the world.

The story of Bi Sheng's invention of movable type printing.

Bi Sheng, who was born in a civilian family, made words with clay, made a square long cylinder with clay, engraved a single word on one side, and then burned hard with fire to make it a clay, and a word is a seal. When typesetting, prepare an iron plate, relax the mixture of incense, wax, paper ash, etc. on the iron plate, and an iron frame is surrounded by the iron plate, and the word seal to be printed is placed in the iron frame, and it is a plate when it is full. It is then baked over a fire, the mixture is melted, and the movable type is combined with a flat plate, which is pressed on the movable type while it is hot, so that the literal surface is flat.

Printing is ready to take place. In this way, print.

The second or third copies are not very efficient, but if the number of copies is too large, dozens or even thousands, the efficiency is very high. In order to improve efficiency, two iron plates are commonly used, one for printing and one for typesetting. After printing one piece, the other piece is lined up again, so that it is used alternately, which is very efficient.

Commonly used characters such as "zhi" and "also" are made into more than 20 prints per character for use when there is repetition in a page. Unprepared rare characters will come out at the right time and be burned immediately with grass and wood fire. The characters removed from the printing plate are put into a small wooden compartment of the same character, and the outside is labeled according to rhyme for retrieval.

Bi Sheng initially used wood as movable type, but the experiment found that the wood grain was sparse and dense, easy to swell and deform after encountering water, and it was not easy to remove after consolidating with the sticky, so he switched to cement. This was the first invention of movable type printing.

The story of Lu Ban's invention of the ink fountain Lu Ban created the ink fountain for carpenters to draw lines, which was the result of his inspiration when he saw his mother cutting clothes with a powder bag. When the ink fountain was just ready, every time Lu Ban played the line, he had to ask his mother to help him pinch the end of the ink line. Sometimes, when the mother was making clothes or cooking, she had to put it down and rush to help.

One day, Luban's mother said to him, "If you make a small spoon, can't you pinch the ink line instead of me?" "Lu Ban heard it, yes!

He quickly made one. From then on, a person can play the ink line. Until now, carpentry masters still call this little hook "class mother".

Archimedes discovers the story of buoyancy in a bathtub.

During an experiment, Li Dezhanger accidentally touched a packet of sulfur and fell directly into the pot where the rubber was boiling, so he prepared one.

Abrasion-resistant, durable rubber, such as today's wheels.