1. The zipper was first invented by Chicago machinist Judson in 1891. In order to alleviate the trouble of tying shoelaces every day, Judson invented a zipper that can replace shoelaces. The zipper consists of a row of hooks and a row of button holes.
Use the iron piece pulled up from the bottom to fasten the hooks and buttonholes one by one. Judson sent samples to the Columbian Exposition in 1893 and received favorable reviews, and was awarded a patent.
There are more and more types of zippers now. Its application is not limited to daily necessities, but has also entered scientific research, medical treatment, military and other fields. It is hailed by some as one of the top ten civilizations in the scientific and technological world of the 20th century.
2. After Newton moved into a new building, he began to study how light is reflected on thin surfaces. He reads and thinks every day. When he got up in the morning and got dressed, he suddenly thought of the problem in his research. He was as if he was trapped by the body-fixing method. He was stunned and then started experiments or work, so he often wore the wrong socks or put on autumn clothes in summer.
"Sunlight is the best light source, and soap bubbles are the ideal thin surface. Why does it become colorful when the sun shines on it?" Newton's mind was in a state of confusion.
He walked to the yard carrying a bucket of soapy water and blew soap bubbles. You see, his two eyes were fixed on the floating soap bubbles. One bubble burst, and then he blew another one. He blew it for several hours as soon as the sun came up.
The neighbor's child stuck his head out of the window and shouted at him: "Crazy old man! You have no socks on one foot!" The neighbor's old lady shook her head: "Young man, I've become a child when I grow old!" Later, people found out that this crazy old man was a researcher of the Royal Society. He was blowing soap bubbles to study knowledge, and they couldn't help but respect him.
3. In 1747, French engineer Fran?ois Freno made the world's earliest raincoat.
He used latex obtained from rubber wood, and after dipping the cloth shoes and coats in this latex solution, they can be waterproofed.
McIntosh, who works in a Scottish rubber factory, is in a difficult situation and cannot afford to buy rain gear. He has to commute to get off work in the rain every rainy day. One day, he accidentally stained his clothes with rubber juice and couldn't wipe it off, so he had to go home wearing the dirty clothes.
It was raining outside, but McIntosh came home and was pleasantly surprised to find that the clothes he was wearing were not wet at all. He simply smeared rubber juice all over his clothes. This is the world's first tape raincoat.
4. In 1828, Sheffield made a blade with one side protected, which was the predecessor of the safety blade.
In 1895, Gillette, an American salesman, met inventor Painter Painter by chance. He wanted to make a lot of money and invent something that everyone needed and could be used once.
One day, Gillette was shaving and found that the razor blade was just right for this idea. He designed a safety razor holding handle, but couldn't find a manufacturer that could make a thin blade. It was not until 1901 that he met the machinist Carson, who solved the technical problem, integrated the hoe-shaped tool holder with the double-edged replaceable blade, and applied for a patent.
As early as 1900, the electric shaver had been patented in the United States, but the first electric shaver suitable for commercial manufacturing was designed by retired U.S. Army Colonel Hick and patented in 1928 Patented.
5. In 1847, Edison was born into a businessman family in Milan, Ohio, USA. When he was very young, Edison showed a strong curiosity. Whenever he saw something he didn't understand, he would grab the corners of adults' clothes and ask them non-stop, always asking the ugly ones.
One day, he pointed to the hen that was hatching eggs and asked his mother: "Why is the hen sitting with the eggs under its butt?" His mother said: "Oh, they are hatching chicks!" In the afternoon, Edison suddenly disappeared. The family looked around anxiously and finally found him in the chicken coop. It turned out that he was squatting in the chicken coop with many eggs under his buttocks to hatch chicks!
After seeing this, his parents couldn’t laugh or cry, so they had to pull him out, wash his face, and wash his clothes. Another time, he saw birds flying freely in the sky and thought: Since birds can fly, why can't people fly? So, he found a kind of medicinal powder for his little friend to eat, in order to make him fly into the sky. As a result, the little friend almost died, and Edison was severely beaten by his father.