Why needed to invent a light bulb
People don’t sleep so much to fall asleep as soon as it gets dark. And so already in ancient times ancient Egyptians had to invent the likeness of a light bulb to illuminate their dwelling. Then more than one century passed until the first space-illuminating electric invention appeared.
Originally, olive oil was used for lighting in ancient Egypt, which was poured into special clay vessels with cotton wick. On the coast of the Caspian Sea, oil was used instead of olive oil, which was very much there. However, this invention could illuminate the room with great difficulty, and the search continued.
From the wick to the kerosene light bulb
Later, closer to the middle ages, candles appeared. They were made from beeswax or melted animal fat.
Both candles and kerosene lamp proved far from safe. They led to numerous fires, so further searches for an analogue of the modern light bulb were carried out along the way of creating a safe device giving light.
In New England, pig fat was used to make candles until 1820. But the light from her no longer matched the growing needs of man. At this time already transferred accumulated knowledge with the help of books. Lighted rooms became very necessary.
As an aside, the great Leonardo da Vinci, he too spent years inventing the lighting device. It was a kerosene lamp.
The invention of the
first light bulb appeared only in the 19th century. It was invented by Pavel Nikolaevich Yabochkov This Russian electrical technician has come up with the first electric candle to illuminate streets. In 1873 the light came to the streets of St. Petersburg. It was a real progress, because lighting began to enter people’s lives. In the evening it became more convenient to walk the streets, it was possible to visit theatres or shops. But the electric candles had one big minus: they were only enough for an hour and a half, then it was necessary to make a replacement for a new one.
From 1840 to 1870, attempts were made throughout the world to create a light bulb that could burn for a very long time. Failure followed failure, and it was not until 1873 that the goal was achieved by the Russian engineer Alexander Nikolayevich Lodygin. The
light bulb was invented by Lodygin in a close to modern analog form.
In the same years, the American scientist Thomas Edison conducted his experiments. In 1879, he succeeded in creating a coal thread from bamboo. Edison did 6000 experiments with different kinds of bamboo before a light bulb was invented that could shine for many hours.
Englishman Joseph Swahn in 1878 proposed for the light bulb the shape of a glass flask with coal thread inside. Then the industrial manufacture of light bulbs began.
From the first light bulb to the modern
Further history of the evolution of the light bulb is the search for the possibility of prolonging the time of In the 90s of the 19th century A. N. Lodygin perfected his light bulb by making an incandescent filament shaped like a spiral of tungsten and molybdenum and pumping air out of the lamp. This enhancement significantly extended the time of use of this light source.
American scientist Irving Lengmuir, who worked for the firm General Electric, filled the bulb flask with inert gas – argon. Finally a light bulb was invented exactly in the form in which it can now be seen in every apartment – giving enough light and working without replacement for a long time.