Making of Light Bulb


Every day we see thousands of light bulbs and the lights of many kinds, colors, design, etc. But have you ever wondered how that shiny thing is made and shines so beautifully in front of you?

light bulb
Photo by fotografierende

The journey begins when an ordinary tramp looking scientist and inventor Humphrey Davey discovered that when an electric current is passed through metals a thin white light can be produced as the heats up,


Following this, the arc lamp was discovered when an electrode is passed With electricity and it gets heated up with a thin white light making an arc through the air reaches the second electrode.

thus, it was named the arc light or the arc bulb. The arc light is also used to decorate the houses nowadays.


The revolution began when an ordinary guy named Thomas Elva Edison discovered that platinum can be used as a heating element to light up. He filed his Patent in 1877.


Despite 10000 failure Thomas Elva Edison was able to discover electric bulbs.

This was a remarkable show of a man’s persistence and dedication. Finally, Tungsten metal was chosen to make the right bulb.


Modern Bulb is made by the following Process

  • The filament is manufactured by a process known as Drawing.
  • Tungsten is mixed with a binder material and then drawn like thin wire, coiling it around a bar to give it a wounded shape.
  • The coiled wire is then attached to lead-in wire, they have hooks at the end and are welded to the end joint
  • The glass bulbs are made from the ribbon machine, After heating the in the furnaces, a continuous ribbon of glass is produced and moved in the conveyer belt
  • The base of the bulb is made by molds
  • Once the filaments, bulbs, base are made they are fitted together and the air in them is evacuated and filled with argon
  • After this, they are sealed and your bulb is ready



BONUS QUESTION- DID YOU KNOW THAT 50 PERCENT OF ALL THE BULB MANUFACTURING COMPANIES IN THE U.S GOES TO THE FAMILY OF THOMAS ELVA EDISON AS A GRATITUDE FOR WHAT HE HAS DONE FOR THE WORLD.
THINK AND ANSWER IN THE COMMENTS BELOW

Extra

Below Video is taken from YouTube channel Insider : How Light Bulbs Are Made

Now, Go to the next chapter, Future of Material science

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