What Jobel invented 5, what Jobel invented

Safety gunpowder. But a lot of people think of this as a war case, so Nobel was very sad, and even a little bit guilty, so he took out his money and gave it to people who helped science every year (and now it is), and if there were no more projects, maybe the money would not be paid

Detonator safety explosives.

Nobel made many inventions in his lifetime, and obtained 255 patents, including 129 explosives alone.

It's like a medical thing.

The biggest invention of his life was solid TNT

Are you talking about the Nobel Prize?

Bell invented the world's first machine.

Bell invented the world's first usable machine and created the Bell Company. He is known as the "father of **" in the world, and also made hearing aids and improved the gramophone invented by Edison. Not only that, but Bell also contributed greatly to the invention of deaf and dumb language.

It can be seen that Bell is not only an inventor, but also an entrepreneur.

Born in Edinburgh, England, Alexander Graham Bell is a well-known Scottish inventor and entrepreneur after graduating from University College London. Bell himself was an acoustic physicist and teacher of deaf speech, and before him, the German Philippe Reis had invented a ** machine, but its biography was so bad that it could not be used. On March 10, 1876, Bell and his colleagues experimented with the world's first working ** machine.

**Development:

**The machine was invented by the American Bell in 1876, he used two wires to connect two transmitters and receivers with exactly the same structure and equipped with a vibrating diaphragm on the electromagnet, and first realized the call at both ends, but the call distance was short and the efficiency was low. In 1878, the appearance of the charcoal microphone, so that the efficiency of the microphone was greatly improved, and the structure of the receiver was also improved.

In 1880, the common electric ** machine appeared, and the power supply was centralized by the common power exchange, eliminating the need for hand generators and dry batteries. In 1891, there was a rotary dial type automatic electric brother Pei old telephone, which can send out DC dial pulses, control the action of automatic switches, select called users, and automatically complete the exchange function, so as to push the first communication to a new stage.

At the end of the 60s of the 20th century, there was a button-type all-electronic machine, in addition to the pulse signaling mode, there was a dual-tone multi-frequency signaling mode, with the development of program-controlled switches, the dual-audio button machine has gradually become popular. In the early 90s, there was a dial-up, call, ringing three functions set on an integrated circuit, with the development of voice recognition technology, directly with the voice dial-up of the new machine is also emerging.

Bell invented the "**".

Bell's main achievement was the invention of **. He also made hearing aids; improved Edison's invention of the phonograph; He contributed greatly to the invention of the deaf and dumb; He has written more than 100 articles and pamphlets.

In 1881, in order to discover the bullet in the body of James Garfield in the United States, he designed a device to examine metal, which became the predecessor of the X-ray machine. He also founded the British Association for the Promotion of Deaf Education.

Born in Scotland in 1847, Bell, the son of his grandfather, who had devoted his life to the education of the deaf and mute, had a keen interest in acoustics and linguistics from an early age.

Bell invented the world's first working ** machine, he also built hearing aids, improved the gramophone invented by Edison, he contributed greatly to the invention of deaf and dumb, Bell was not only an inventor but also an entrepreneur.

In fact, Bell is a physiologist and teacher of deaf-mute language, on March 10, 1876, Bell and his colleagues experimented with the world's first usable ** machine, in addition, Bell also invented an instrument to measure hearing, can find metal instruments in the human body and other inventions, became the predecessor of the X-ray machine, and founded the British Association for the Promotion of Deaf Education.

Although Bell has a patent for the invention of **, there are some doubtful voices, believing that Antonio May Ucci is the inventor of **, in addition to inventing **, Bell also invented the giant kite that carried people, and also invented a hydrofoil for the Canadian Navy to compete with the German U-boat in World War II. Bell and Helen Keller were best friends, and in 1922, Bell died.

Bell invented the world's first ** machine and is known as the "father of **", in addition to Bell also invented ** hearing aid equipment (the predecessor of electronic hearing aids), metal inspection devices (the predecessor of X-ray machines), and vacuum suits (the predecessor of ventilators).

** The process of invention:

The principle of the early ** machine is: the speaking sound is a composite vibration in the air, which can be transmitted to the solid and transmitted on the conductive metal through electrical impulses. Alexander Bell, an American, applied for a patent in March 1876 and founded the Bell Company.

The earliest prototype appeared in the 18th century, when Spanish scientists wanted their information to be transported to a long distance, so they built a machine to communicate information, and finally failed because it was more troublesome to enter information. Although this was a scientific failure, it laid the foundation for countless subsequent experiments to improve it.

Just 30 years after this experiment, the American inventor Morse invented the first telegraph that was first used, and in 1837 he also created a set of digital ciphers that have influenced this day, the "Morse Code". This improvement summed up the lessons learned from the previous time, so that password input no longer requires multiple wires to guide the transmission, but it is necessary to learn the password, so at that time, only high-level people would use this kind of telegraph, and the popularity was not high.

The advent of the telegraph promoted the production of **, in the 60s of the eighteenth century, a teacher in his twenties in Germany invented the first ** machine, but he did not apply for a patent for **, but the American Alexander. Graham. Bell was the first to apply for a patent for a machine, which led to a disagreement on the issue of inventors, with Germany and the United States insisting on their own words, and other inventors appearing.

However, at present, the number of inventors who believe that the inventor is Bell, after all, he is the first person to apply for a patent, Bell not only has achievements in the field, he also put forward the idea of manning the sky, and made a huge kite for people to fly, which has inspired the creation of paragliding for future generations, and he is still good friends with the famous philanthropist and educator Helen Keller, and his personality charm is also the main reason why he is recognized.

Alexander Graham Bell is an American inventor and scientist who invented **. ** is a communication tool that transmits sound to the place where the distant grandson is not traveling. Bell invented the first ** in 1876 and applied for a patent at the U.S. Patent Office that year.

He used the principle of electromagnetic induction to convert sound signals and a filial piety oscillator to amplify the signal. This invention is of great significance to human communication, and the change is a careful call for the way humans communicate.

Bell invented the first ** machine, and he is also known as the father of **, in addition to slapping socks, his achievements include the manufacture of hearing aids, the improvement of the phonograph. Alexander Graham Bell was born in Edinburgh, England in 1847, and after his invention, he founded the Bell Company, which was named one of the top 10 outstanding Canadian people.

What Bell invented.

Bell invented the first electric joke machine.

The most important invention in Bell's life was the world's first machine, and he also obtained a patent for the world's first available machine, so he is also known as the father of the world. In addition to this, Bell also made hearing aids and improved the gramophone.

Bell introduced. Bell's full name is Alexander Graham Bell, he was born in Edinburgh, England in 1847, born in University College London, and founded Bell after the invention of the company, which was once selected as one of the ten outstanding Canadians.

**Introduce. ** is a very common item in our life now, it is divided into fixed**, mobile ** two types, can allow us to communicate face-to-face in the case of thousands of miles apart in language, with the development of science and technology, now mobile **, **, **TV, access to the network and other functions.

Bell's briefing is complete

Alexander Graham Bell was born on 3 March 1847 in Edinburgh, Scotland, where he received his primary education. Bell immigrated to Canada in 1870 and to the United States a year later. He became an American citizen in 1882.

Bell's Invention On March 10, 1876, Bell and his colleagues experimented with the world's first working machine. He used two wires to connect two transmitters and receivers with the same structure and a vibrating diaphragm on the electromagnet, and Tong Yu realized the communication at both ends. In addition, Bell invented an instrument for measuring hearing, an instrument for discovering metals in the human body, and other inventions.

He invented the world's first usable ** airplane, a manned giant kite, a hydrofoil, he also made hearing aids, improved the gramophone invented by Edison, and he contributed greatly to the invention of deaf and dumb. <

He invented the world's first usable ** airplane, manned giant kites, hydrofoils, he also built hearing aids, improved the gramophone invented by Edison, he contributed greatly to the invention of deaf and dumb, Bell was not only a remarketing bureau inventor but also an entrepreneur.

In fact, Bell is a physiologist and teacher of deaf-mute speech, on March 10, 1876, Bell and his colleagues experimented with the world's first usable ** machine, in addition, Bell also invented an instrument to measure hearing, can discover the human body metal instruments and some other hair and dumb Shen Ming creation, became the predecessor of the X-ray machine, and founded the British Association for the Promotion of Deaf Education. Although Bell has a patent for the invention of **, there are some doubtful voices, believing that Antonio May Ucci is the inventor of **, in addition to inventing **, Bell also invented the giant kite that carried people, and also invented a hydrofoil for the Canadian Navy to compete with the German U-boat in World War II. Bell and Helen Keller were best friends, and in 1922, Bell died.