1, Edison invented the phonograph
Edison is a famous American scientist and inventor, because he has electric light, phonograph, movies and storage batteries and so on more than a thousand kinds of inventions, so people call him "king of invention", "magician "
The first time I've ever seen a man like you, I've never seen you.
Edison's greatest achievement was the invention of the electric light, however, in his inventions, the most shocked society at the time, no better than the phonograph. In the fall of 1877, Edison's invention of the phonograph sensationalized the whole of New York, news reporters from various newspapers.
Like a tidal wave came to report this big news. This invention once the word got out, stirred up the society at that time rapid and huge frenzy for months, the railroad special open special car to visit, many people began to disbelieve this invention.
Suspecting that he had first hidden something inside that could talk to deceive people, a church bishop recited a string of specialized terms from the Bible into the radio dial at top speed.
When these terms were repeated verbatim from the machine, people were convinced that the thing was indeed not a fake, and in unison, newspapers called the phonograph the miracle of the 19th century.
2, the invention of the telephone
Bell, the man who invented the telephone. He was born in England in 1847, and when he was young, he worked with his father in teaching the deaf and mute, and had wanted to make a machine that allowed the deaf and mute to see sound with their eyes.
In 1873, Bell, who became a professor at Boston University in the United States, began to study the multiplex telegraph, a device for transmitting many telegrams on the same line, and developed the idea of using electric current to transmit the sound of human speech to distant places.
To make people who are far away from each other can talk to each other as if they should. So, Bell began the research of the telephone. It was June 2, 1875, when Bell and his assistant Watson were testing a multiplex telegraph in two separate rooms when a chance accident inspired Bell.
A spring on the telegraph in Watson's room had stuck to a magnet, and when Watson pulled the spring apart, it vibrated. At the same time, Bell was surprised to find the spring on the telegraph in his room quivering and making a sound.
It was the electric current that transmitted the vibrations from one room to another. Bell's mind was opened to the idea that if a person spoke to a piece of iron, the sound would cause it to vibrate; if an electromagnet was placed behind it.
The vibration of the piece of iron is bound to produce a current in the coil of the electromagnet, which is sometimes large and sometimes small. This fluctuating current is transmitted along the wire to the distance, the distant similar device on the same vibration will not happen, the same sound?
The sound would then travel along the wire to the far side. Wouldn't this be the dream telephone! Bell and Watson made the telephone as newly envisioned. During an experiment, a drop of sulfuric acid splashed on Bell's leg.
The pain caused him to scream, "Mr. Watson, I need you, please come to me!" The words traveled from the telephone to Watson's ear via the wire, and the telephone worked.On March 7, 1876, Bell became the patentee of the invention of the telephone.
3. The story of Roland Hill's invention of the postage stamp
The development of human society has determined that human beings cannot survive on earth for a long time by their individual strength alone. Human beings need help, human beings need to communicate, information transmission has become one of the basic activities necessary for human survival.
Initially, there were gestures, and then language was invented, and long marathon runs were used to transmit oral messages. Then came the invention of writing, and the beginning of the transmission of letters, which led to the ancient postal stage. Postage was calculated on a piece-by-piece basis according to the distance the mail traveled and the amount of paper in the letter.
It was a "progressive postage system" and the rates were very high. If a river flooded or a bridge collapsed, the letter had to travel hundreds of kilometers more. In total, the postage was prohibitively high. Such expensive postage was daunting for the common people.
They viewed sending letters as a luxury.
The 1830s was the golden age of reform, and it produced a generation of heroes. Roland Hill invented the world's first postage stamp, setting an epochal milestone in the world's postal history.
After years of research, Roland Hill advocated a drastic reduction in postal costs, and the introduction of a uniform postage rate of 1p for all mail, regardless of distance. He also proposed the use of "well printed postal matter" to pay postage in advance. This paper was of a similar size to the postage image.
A thin layer of adhesive on the back, which could be wetted and attached to letters, was Rowland Hill's original idea for stamps. In response, Rowland Hill wrote to the government with his own recommendations for reform.
On August 17, 1839, Queen Victoria approved the motion, deciding that from January 10, 1840, Britain would have a one-penny equal postage rate. Rowland Hill was also appointed by the Queen to take charge of postal reform. In order to turn the idea of a 1p stamp into a reality.
Rowland Hill demanded that a stamp should be designed with a design that was secure against counterfeiting and would be credible with the public. A profile head of Queen Victoria by William Wynne was used to show the authority of the stamp issue.
The stamps also promoted Britain and the Queen. The stamps were printed in black ink, and on April 15, 1840, the world's first postage stamps, the black penny stamps, were finally printed.
4. The story of Zhang Heng's invention of the geodesic instrument
In China's history, in addition to the literati, emperors and generals, there were many scientists, and Zhang Heng was one of the very famous ones. Zhang Heng did a lot of things in his life, but his most famous invention was the "geodesic instrument".
During that time, earthquakes happened often. Sometimes several times a year. One big earthquake would bring a lot of harm to the people and the country. The emperor and the common people at that time regarded earthquakes as an unlucky sign and believed that they were caused by ghosts and gods.
Zhang Heng, however, did not believe in gods and evil spirits, and after careful examination and testing of the recorded seismic phenomena, he invented an instrument that could measure earthquakes, which was called the "Geodesic Instrument". Geodesic instrument is made of bronze, shaped like a wine altar, surrounded by cast eight dragons.
The heads of the dragons extended in eight directions. Each dragon's mouth contains a small copper ball, under the dragon's head, squatting a toad with a big mouth. When an earthquake occurred in any direction, the mouth of the dragon facing that direction would automatically open and spit out the copper ball.
The ball fell into the toad's mouth and made a loud sound, telling people that an earthquake had occurred there. One day in February 138 AD, the mouth of the dragon facing the west suddenly opened and spat out the copper ball, which was a report of an earthquake in the west.
But on that day there was no sign of an earthquake in Luoyang, and no one had heard of an earthquake in the neighborhood. So the court was abuzz with talk that Zhang Heng's geodesic instrument was a fraudulent contraption.
A few days later, someone on a fast horse came to report to the court that there was a big earthquake in the area of Jincheng and Longxi, more than 1,000 miles away from Luoyang, and that even the mountains had collapsed down. The group was then truly convinced.
5, the invention of the lightning rod
In 1752, 46-year-old American scientist Franklin made a kite out of silk and used twine to fly it into the sky on a stormy day. A metal key was attached to the bottom end of the twine, and when rain watered the twine, it became a conductor of electricity.
Then he put his hand close to the key and suddenly saw an electric spark jump between the key and his finger, while his finger felt a tingling sensation. This experiment proved that thunder in the sky is actually a massive electrical discharge.
This led Franklin to think that if a metal wire was installed on a tall building and the lower end of the wire was grounded, the building could be protected from the danger of being struck by lightning according to the principle of tip discharge. This led to the invention of the lightning rod.
Because of the invention of lightning rods, the world in which human beings live is a little more secure. The invention about the lightning rod seems to be a coincidence. A coincidence reminded a great man of a sudden idea that led to invention and creation.