From January 1, 2014, the United States will ban the sale of incandescent bulbs of more than 40 watts. After all, the incandescent bulbs will not be able to withstand the wheel of the times and will be eliminated. Take this opportunity to trace the history of the development of the entire bulb.
1803~1809, First Arc Lamp is created
For the first time, Humphry Davy presented the first incandescent lamp at the Royal College of England, which consisted of a battery and a pair of carbon compounds. After that, street lights on many streets use this kind of arc lamp.
1835, First Constant Electric LightIs Demon strated
James Bowman Lindsay presented a constant current lamp for the first time at a public meeting. Some people think that he is the inventor of incandescent bulbs.
1850~1589,Light in a Tube
In the 19th century, two Germans could illuminate by evacuating the air inside the glass tube and passing current through the glass tube. They called him the Geissler Tubes. This quickly became the basis for other light source technologies, including fluorescent lights. This picture is what the early Geisler tube was painted.
1877~1885,Competition for the Incandescent Light Bulb Heats Up
The competition for incandescent light bulbs has intensified, and the world's inventors, including William Sawyer and Albon Man from the United States, and Joseph Swan from the United Kingdom, are all working to create an electroluminescent incandescent bulb. The bulbs in the picture are like some of the early incandescent lamps.
In 1878, Edison Begins Working on Incadescent Lights
In 1878, Edison and his assistants began to turn their attention to incandescent lamps. Their research focused on improving the life of the filament, starting with carbon, then platinum, and finally returning to a carbon filament. The picture is Edison's patent on incandescent bulbs.
1901, Precursor to Fluorescent Lights
Peter Cooper Hewitt created blue-green light by emitting a beam of electrons through the mercury vapor. This kind of light can only be used in some fields, and it is a precursor to the development of fluorescent lamps.
1904,Out with the Carbon Filament and in with the Tungsen
In 1994, incandescent bulbs made of tungsten lamps first appeared in the European market. Compared to carbon filament bulbs, self-contained bulbs last longer, brighter and more efficient.
In 1908, Edison Screw Becomes Universal
Edison’s contribution to the incandescent bulb was the socket he invented, which we now call a spiral bulb. In 1908, this spiral bulb was the most common lamp head, and it is still today.
1913, Doubling the Efficiency of Incandescents.Irving Langmuir
It was found that filling the inside of the bulb with nitrogen would double the luminous efficiency of the bulb.
1926~1934, Neon Tubes+Phosphers=Fluorescents
In the late 1920s and early 1930s, European scholars began research on fluorescent-coated neon tubes. The results of these experiments have led to a wave of research and development in fluorescent lamps by American scholars.
In 1951, Fluorescent Overtake Incandescents
In 1951, the number of fluorescent lamps produced was much higher than that of incandescent lamps. This change was caused by the energy crisis caused by the Second World War.
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