People have always tried to light, looking for the possibility of extending daylight. In the invention of the bulbs in the form in which it exists today, gone century.
Evolution of illuminating the cave fire up the torch from lowered into the oil wicks up candles on kerosene lamps to modern light bulbs has become a powerful impetus development of mankind.
Why was it necessary to invent the light bulb
People are not so much sleep to fall asleep as soon asOnly dark. That is why already in the ancient times, the ancient Egyptians had to invent similarity bulbs to illuminate your home. Then, more than a century passed before there was a first electrical invention illuminates the space.
Initially, the lighting in Ancient Egyptusing olive oil, which is poured into a special clay vessels with a cotton wick. In the Caspian Sea coast to use oil instead of olive oil, of which there were very many. However, the invention could illuminate the room with great difficulty, and the search continued.
From wick kerosene to light bulbs
Later, closer to the Middle Ages, there were candles. They were made of melted beeswax or animal fat.
And candles and kerosene lamps were farsafe. They led to many fires, so further exploration analogue of modern light bulbs were made towards the creation of a secure unit, providing light.
In New England until 1820 for manufacturingCandles used lard. But the light from it is no longer meet the growing needs of man. At this time we have passed the accumulated knowledge through books. It became necessary lit room.
Aside from the problem did not stay and the great Leonardo da Vinci, he also spent years in the invention of the fixture. It was a kerosene lamp.
The invention of the first light bulb
The first light appeared only in the 19th century. She invented Pavel Yablochkov. This Russian electrical engineer and invented the first electric street lighting candle. In 1873, the light has come on the streets of St. Petersburg. It was a real progress, because the lighting was included in people's lives. In the evening it became more convenient to walk the streets, you could go to the theater or shopping. But the electric spark was one big disadvantage: they lacked only a half hour, then it was necessary to make a change to a new one.
Starting from 1840 to 1870 in all countriesthe world attempts to create a lamp that could burn for a long time. The failure followed failure, and only in 1873, the goal was reached by Russian engineer Alexander Lodygin.
The bulb was invented in Lodygin close to the modern analog form.
In those same years, the American scientist Thomas EdisonHe carried out his experiments. In 1879, he managed to create a thread of bamboo charcoal. Edison made 6000 experiments with different kinds of bamboo, before light was invented, which could shine a lot of hours.
Englishman Joseph Swan in 1878 proposed to form the bulb glass bulb with carbon filament inside. Then began the industrial production of light bulbs.
From the first to the modern light bulb
The subsequent history of the evolution of the bulb - it searchesthe possibility of extending the time of its operation. In the 90s of the 19th century AN Lodygin perfected his light bulb, making the filament in a spiral of tungsten and molybdenum and evacuate the air from the tube. This improvement greatly extended the use of the light source.
American scientist Irving Langmuir, who worked inthe company "General Electric", the flask filled bulb with an inert gas - argon. Finally, the light bulb was invented precisely in the form in which it can now be seen in every apartment - giving ample light and runs without changing for a long time.