There are many different types of welding process in the welding history. The term welding, whose origin is identical with that of the word well in the sense of welling or boiling up. In the previous time known to have been familiar to some extent with the blowpipe or flame torch, but there was no record of their having ever applied it to the joining of metal by fusion process. The water-
At that time the oxy-
Willson and Moisson had developed a method of making calcium carbide(CaC2) in the year of 1891. In 1895 a Frenchman had discovered the another type of welding process that equal parts of acetylene and oxygen burned together gave a higher temperature.
Another welding had been happening in 1881 by Mr. de Meritens. During his experimental works he faced with the necessity of joining together certain parts of electrical storage batteries. He placed the work-
Elihu Thomson had made first electric welding machine patent in the year of 1886, which was big type of welding machine. His process was usually called butt-