THE 5 MOST IMPORTANT INVENTIONS IN HISTORY

History Invent.

The 10 most important inventions in history.
Throughout history, there have been innumerable inventions, which, to a greater or lesser extent, have contributed to our current welfare.
Some of them have become an indispensable part of our lives, others go unnoticed by us although they are an essential part of all and several of them are forgotten because they are not very useful.
According to the time when we think we would find that we can make a list of the most important inventions of the same but if you had to choose only 10 inventions of all THE HISTORY OF HUMANITY, among them, could be some of these:

1-THE FIRE.
2-THE WHEEL.
3-PRINT.
4-THE LIGHT BULB.

5-THE FRIDGE.

THE FIRE.

When it appeared?

It is assumed that prehistoric man knew the fire by the eruption of a volcano, fire or the fall of lightning.

But it was not until 350,000 years ago that the Atapuerca man started using it.

In its origins, the biggest problem was to take care of it to keep it burning until they knew how to turn it on and feed it with fuel.

Ends that meets:

-In prehistory they were used to cook raw foods; keep dangerous animals away; get warm; its flames served as weapons in the fights and hunts and its smoke served to make the first communications.

-Posteriormente has been used to light up in the hours of darkness (through candles ...); in ovens ... and in endless everyday things.

Functioning:

Fire is a chemical reaction of violent oxidation of combustible material, with the release of flame, heat, water vapor and carbon dioxide; for it to occur there must be fuel, oxygen and high temperature. The first method of ignition is supposed to be that of rubbing a dry stick tip over the same point of dry wood. Humanity had to wait until the year 1827 (according to other sources 1832) to achieve an invention as the matches by which its ignition was easy.

Advantages and disadvantages:

Thanks to its appearance, civilization has been able to reach where we are now, it has given man protection from the cold, birth ...

Among its current environmental drawbacks, we find that it is sometimes used in a harmful way by some people who cause fires and that its combustion produces toxic gases.

THE WHEEL.

When it appeared?

It is not well known how or when it appeared.

The first historical evidence of its existence is around 3000 BC and belongs to the Mesopotamian civilization (the famous wheel of Ur). This is a clay disc with a central hole and other smaller lateral ones.

Ends that meets:

Many historians maintain that the wheel is the invention that has changed civilization the most. It was decisive for later inventions such as the pulley. Both, the wheel next to the pulley facilitated the transport and the architectural construction.

Functioning:

Its operation is very simple based on the rotation on itself.

Advantages and disadvantages:

There are innumerable advantages that the invention of the wheel has brought and there are no disadvantages except that for its manufacture it is necessary to obtain materials that can cause pollution and that when they wear out they are discarded, although now the tires of the cars they are recycled.

Among some of the advantages, we find that thanks have been able to develop new inventions such as horse carriages, automobiles ...

PRINT:

When it appeared?

In the 15th century (according to the discoveries, cards and prints with religious motifs were already printed, through the application of a wooden plate engraved and smeared with greasy ink, on paper or parchment).

Who is he invented?

According to research, the printing press was invented by the Chinese and modified by Johannes Gutenberg (around 1450), who is credited with the first invented with mobile characters (one of the great milestones in the history of culture).

Ends that meets:

Allow the possibility of making copies of multiple copies of books (any text ..) facilitating the access of a greater number of people to them.

Functioning:

To create the printing press with mobile characters that could work, Gutenberg made the following steps:

-Adaptó a wooden press that was used to grind the grapes in the preparation of wine.

- Created metal (lead) mobile types that, unlike wood types, were much more resistant, so they could be used many times.

-Modified the consistency of the ink to be denser and stick to the mobile types well.

For the same to work, the types were placed

one after another, on a wooden stick in line. The words were separated by a type of relief. The lines obtained were arranged in a box or galley. Then they smeared ink on the characters and put a scroll on them. The impression was obtained from the pressure of the galley against the sheet by means of the press.

Advantages and disadvantages:

The printing press only brought advantages, thanks to its appearance, written knowledge ceased to be the patrimony of the elite and spread to the entire population, substituting writing for oral tradition as a way to transmit knowledge, generalizing printed publications of books or newspapers.

THE LIGHT BULB.

When it appeared?

In the year 1879.

Who was its inventor?

Thomas Alva Edison.

Ends that meets:

Delivery in hours without light or in places where there is no light.

Functioning:

It has a glass globe in which a vacuum is made and inside which there is a filament that when being crossed by an electric current emits visible light.

Advantages and disadvantages:

The light bulbs have evolved, currently we find low consumption light bulbs that pollute little; they facilitate us the lighting without which it would not be possible to carry out functions at night, allowing us to make cities safer and the communication routes are passable in times of low light. Among its drawbacks is that once they are melted their material must be recycled, which does not always happen because we are not aware and contribute to the so-called light pollution.

THE FRIDGE.

When it appeared?

In 1876.

Who fictional it?

Charles Tellier, a French engineer.

Ends that meets:

Allow increasing the nice condition of spoilable foods at optimum temperatures.

Functioning:

The white goods consist primarily of a thermostat to manage the cold within, which controls a mechanical device loaded with gas. By a method of compression and decompression of this gas, cold is delivered to the inside of the white goods and also the heat is removed through the grid of the rear.

Advantages and disadvantages:

It permits North American country to be ready to refill on food and have provisions in our homes while not them being broken by the temperature that exists within the atmosphere, not counting on the seasons thus we are able to take food from different seasons (thanks to them we can take strawberries or melons all the year, as a result of they're unbroken in cold stores ...); among its drawbacks we discover that when they need to be restored in our homes, they have to be dropped at clean points as a result of they're extremely polluting by the gas they carry within.