The welding machine was invented by the Russians
I often see posts in Zen and Odnoklassniki that Russians have invented almost half of all the great inventions in the world: both the radio and the telephone. I don't know what is true and what is fiction, but the fact that it was the Russians who invented electric arc welding, which is used by all of humanity today, is a fact.
And discovered the effect of an electric arc (read invented welding) a simple Russian teacher - the son of a parish priest Vasily Petrov. It was back in 1802.
Tell me honestly, could you imagine that this invention is 218 years old?
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Petrov was a very talented self-taught physicist, and in 1802 he constructed a large galvanic installation with an electromotive force of 1700 V. The giant battery consists of 4200 copper and zinc circles with a diameter of 35 mm.
Sealing wax and rags soaked in ammonia were laid between the circles. It was the world's first wire insulation.
And another thing that is obvious today is that metals have resistance, was also discovered and proved by Vasily Petrov.
Unfortunately, Petrov did not begin to patent his invention and openly wrote all the nuances of his experience in scientific journals of that time. So the welding machine, built on the principle of Petrov's electric arc, became public property.
Today there is no country in the world where an electric arc is not used: it is present in metallurgy and in construction - it works in a welding machine.