10 forgotten 'cool' inventions of renowned scientists

Talking dolls, metal detectors, wooden swimming fins . are seemingly strange inventions of talented scientists.

A real inventor will always explore the idea of ​​serving the needs of life, even if it is only the smallest needs. So they are always thinking hard, inventing, creating new products.

Among them, there are great inventions but also inventions that are not really useful or not recognized by people.

Here are the forgotten inventions of famous scientists:

1. Leonardo Da Vinci - a giant crossbow

Leonardo da Vinci (1452 - 1519) is known as an inventor but his products often stop at models or sketches that rarely become real products.

One of his discoveries also became a symbol that never appeared in the flesh - it could be said to be flying engines. Leonardo once had time to participate in the battlefield, so he designed an armored transport vehicle like a tank and a very strange giant bow.

This is probably one of his most useful inventions. Crossbows are fitted to 6 wheels for easy travel. The bow and arrow are made of thin wood so light and flexible.

But few people suspect, the only reason he invented a bow of 25m in width is to attack the psychology before the enemy. The power from threat is the most important part of his design. However, in 2010, scientists in the US realized this idea.

2. Benjamin Franklin - wooden swimming fins

In his lifetime, Benjamin Franklin (1706 - 1790) devoted many inventions in various fields. He was a very curious child and started his patent career at age 11 when he invented a swimming fins.

Little Franklin loves swimming and wants to improve his swimming skills. He had thought of putting two wooden fins in his hand, instead of his legs. He described his fin to look like a painter's color palette, 25cm long and 15cm wide, with a small round hole that fits in his thumb.

This type of fin did not become a famous invention, but for little Franklin, wooden fins helped him swim faster but made his wrists wear out.

Franklin also tried wearing sandals when swimming but they didn't have any effect. Finally, with a passion for swimming, Franklin worked hard and was enrolled at the International Swimming Hall of Fame in 1968.

3. Justus Von Liebig - compressed meat in tablets

In the list of the greatest chemists of the nineteenth century, Justus von Liebig (1803 - 1873) not only created a chemical experiment but also invented a meat or vegetable tablet for cooking soup (or is wedge seeds today).

After realizing that the leather manufacturers only treated the skin and removed the meat, Justus von Liebig and engineer George Christian Giebert developed Liebig's meat processing method and the meat extraction company was born in in 1864.

The purpose of Liebig was initially quite humane with the desire to find solutions to supply poor meat. He has published widely and hopes someone will improve the process, reducing costs. However, when Liebig started his own company, many other companies competed. Finally, Liebig must change his brand.

4. Alexander Graham Bell - metal detector

In addition to the great invention, the desk phone, Alexander Graham Bell (1847-1922) created one of the first metal detectors to save President James Garfield's life.

On July 2, 1881, James Garfield was hit in an attack. Doctors and medical experts from all over the world tried to take the bullet out of his body. They thought it was necessary to put an object inside the wound to find the bullet.

However, this will only aggravate the wound. Bell suggested using an electronic device to find metal bullets. This detector will emit magnetic fields, when it detects the appearance of metal, they will make a sound.

However, when he brought the detector closer to the president, the machine rang continuously as if there were bullets everywhere. Bell said that there was a bit of trouble with the machine, he brought it to repair, but when brought near the president they still called out.

Later researchers agreed that the device could not be used at the time but no one recognized the metal's appearance on the president's bed sheet at that time.

It is these metal decorative strings that neutralize the effect of the detector. There are records that say that Bell only uses the detector on the right side of the patient at the request of Doctor Doctor because he confirms the bullet is on the right and has no idea that the bullet will run over. other part.

5. Thomas Edison - talking doll

Thomas Edison (1847 - 1931) was not only an inventor of a talent but also an entrepreneur. Unlike other inventors, Edison earned a lot of money from his creations because he knew how to find fertile markets.

Succeeding with inventing the recorder, he also tried to attach it to many different utensils and from here - the talking doll was born in 1888.

However, this product is not well received by the public because when the battery is almost empty, the doll's voice is interrupted, blurred and somewhat spooky. Edison was passionate about this product but the talking doll was only sold for the first few weeks and was forgotten.

6. Nikola Tesla - Remote control ship

Nikola Tesla (1856 - 1943) was not only a scientist associated with the doctrines of electricity, but also pioneered the invention of radio waves - radio waves from the time when many considered it to be witchcraft.

The most obvious demonstration was at an 1898 event at Madison Square Garden, Tesla performed his latest invention with a small remote control ship.

The ship consisted of a small rudder, a small propeller and two antennas. Tesla successfully controlled the ship to the amazement of the crowd.

Everyone was surprised by what happened, but they did not believe Tesla's scientific explanation. Most people agree that he uses telepathy. There are a few more realistic ideas, for example . there's a trained monkey sitting inside driving the ship.

With his vision, Tesla immediately thought of using a remote control ship as a weapon. He plans to carry out a remote-controlled submarine version and sell it to the government. However, the authorities in Washington laughed at the idea and of course, no one agreed with his plan.

7. Joseph Priestley - Carbonated water

Joseph Priestley (1733 - 1804) was a famous theologian, philosopher, and chemist. His most outstanding achievement was the discovery of oxygen and many other gases.

Unfortunately, he was isolated by the scientific community because he was determined to protect the existence of "heat" when the theory was considered obsolete. But before those things happened, Priestley created a popular daily drink: carbonated water.

The story takes place when Priestley lives next to a brewery and often conducts experiments there. Once he discovered a method of infusing carbon dioxide (CO ₂ ) with water by hanging a bowl of water on a fermented beer barrel. After that, he discovered that the water tastes very sour.

At first, Priestley only kept this steamed drink for himself and his friends. Later, he hypothesized that this water could be used to treat vitamin C deficiency. Although this theory is not accurate, it is still beneficial to humans.

In 1772, he published in detail the method of creating carbonated water in an article entitled "Instructions on how to mix water with carbonic gas." Priestley never studied further or sought to make money from this discovery. but this is an idea for a business to make money.

8. Copy machine - James Watt

James Watt is one of the leading scientists in the 'Industrial Revolution' with the invention of a steamboat. He is recognized by the world as a genius and that talent is devoted entirely to science.

Because the mind has no room for business, most of his life, he lives in poverty, debt. One of the remarkable products that contributed to his slightly more pleasant life was the copy machine.

With just a push of a button and a small stack of paper, you can copy the documents quickly. And the working principle of this machine is also used for modern photocopiers.

9. Electric Piano - Walther Hermann Nernst

Walther Hermann Nernst is a famous German chemist. He won the Nobel Prize in Chemistry in 1920 thanks to the following scientific work: ' Research and calculation of chemical affinity and law 3 of thermodynamics'.

He also coined the first electric piano Neo-Bechstein-Flugel in collaboration with Bechstein and Siemens.

Although it is said to be an electric piano, this product does not have speakers but only thin strings and a small hammer to produce sound.

Later, there was also a radio and recorder included. And this technology is still in use today.

10. Table of life - Edmond Halley

Must everyone have heard of 'Halley Comet' ? It is this star named after an English astronomer, geophysicist, mathematician, meteorologist and English physicist.

He is a great man in astronomy. Therefore, no one remembers one of the other great demographics in his demographics - Table of Life.

It is simply a statistic table in terms of birth, death and migration of a city and from there gives future predictions. This invention has made statistics much easier.