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The bulb

Subject: Inventions
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The invention of the incandescent lamp has a fascinating history spanning the 1800s. At the beginning of this period consisted available lights of candles, gas and oil lamps. In 1809, started an English chemist, Humphrey Davy, the journey to the invention of a practical incandescent light source. He used a battery to induce current to two kolremsor. The stream that flowed through the two kolremsorna formed an intense arc between the two strips, and he had created the first arc lamp.

1820 was Warren De la Rue the first known attempt at a light bulb. He settled in a platinum coil in a tube with the vacuum and let an electric current through the coil. The design was based on the concept of Platina high melting point and therefore would work. The empty chamber did not contain the same number of gas particles that could react with the platinum and would therefore have a longer shelf life. Although it was an efficient design so did the price of platinum so that ordinary people could not afford it.

In the 1800s there were many inventors who strove to create a practical and efficient long-life bulb. The primary was to create a durable and highly resistant hot filament. This was the key to a practical incandescent light. Many materials with high melting points were investigated in the vacuum chamber.

Men such as James Bowman Lindsay, Frederick the Moleyns, Heinrich Göbel, Joseph Wilson Swan, Thomas Alva Edison and others, were dedicated in their efforts in the fight to be the first to invent a practical light bulb. The breakthrough for the Edison and Swan came in 1879 when they produced the first light bulb that burned a convenient time, at most, in and of itself just 13.5 hours. Their construction was based on a carbon filaments derived from cotton. The next step was to get blackbirds councils to burn longer. In 1880, Edison produced a carbonized bamboo filament that survived for up to 1200 hours.

Other inventors tried to improve brightness by means of two new filament materials. 1898 using Karl Auer osmium, having a melting point of 3045 ° C. Then, in 1903, Siemens and Halske tested with tantalum, which melts at 2996 ° C. These elements drew attention because they could operate at higher temperatures with longer life and less evaporation.

Then came the flexible heavy stone, a materially much improved filament. The development of the filament leading to the modern tungsten filament and it was William David Coolidge of General Electric Company who developed it between 1906 and 1910. Heavy stone has many favorable properties such as melting point 3410 ° C and it is very elastic. This filament is still used today.

Because of its strength and it is easy to work with as the heavy stone easily be used in the filament coils that are used at elevated performances in modern bulbs. Because tungsten can withstand such high heat, you could have a high impact, it had a very good brightness. But at high temperature was covered glass beads with a thin black tungsten film and the light got worse. To get rid of this problem filling it with gas lamps (usually uses argon and nitrogen, but you can also use other noble gases). The gas is reduced evaporation and increased filament life. It also carried away the heat from the filament and reducing its temperature and luminosity.

In today's society there is almost lights everywhere. In most homes, there are lights and the many technical products there is some sort of lamp. At the beginning of the 1800s had only candles, oil lamps and gas lamps. The need for a stronger and more efficient source of light was great. Candles, oil and gas was expensive and many could not afford it. In the beginning was the bulbs expensive, but they became less expensive as technology moved forward with new materials and designs.

But there are many in today's society that can not afford light bulbs, or lighting at all. Viewing For example, in the poor parts of Africa and the poorer parts of Asia, many people who live in simple huts and have barely afford food for the day.

The bulb is not very good for the environment. To obtain the raw materials you need to have large mines where you can break the minerals and everything that comes to the mines. Then the raw materials are transported in some way and then you have to destroy the environment even more. The raw material will then end up in big factories and on to the next factory that makes clear bulb. It is then transported out to the shops and finally put it up somewhere. When the lamp is used as the ports in the dumps and cause another environmental problem.

There are only a small portion of emissions, only to run the bulb so you need the power. The power must come from somewhere, mostly from nuclear power plants, wind turbines or coal plants. We all know how environmentally hazardous coal plants and nuclear power plants is the form hazardous waste.

The bulb will probably remain much longer, but keep developing the alternative light sources. The tube is another invention that was invented in the 1800s. It was Nikola Tesla who invented it and he worked for a while with Edison. A variant of the fluorescent tube is the diode, which is now very used product.

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