Publisher's Synopsis
Excerpt from The New International Encyclopaedia, Vol. 5
Generally speaking, all chains over one inch in size are made by hand. Machine-made iron chains are of two kinds, known as welded chains and weldless chains. In making welded chains by machine the rod of iron is first mm through a machine called a winder, which winds it round a mandrel and turns it out in the form of a long spiral spring. This rod is then cut by a machine so that each twist or spiral is severed from the next and the stock is in the form of rings whose Open ends only need to be welded together to form complete closed links. The welding is done by heating the ring and placing it in dies, which, under the blows of a trip hammer operated by the workman's foot, form it into shape and weld together the open ends.
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