Welding; theory, practice, apparatus and tests, electric, thermit and hot-flame processes . /. .1 B Fig. i8.—Two types of Thomson automatic break switches. panics supply mains are available in most manufacturingcentres. On account of the type of welds it handles, the Thomsonwelder is often made automatic. Suppose a welder is beingfed links of a chain to be welded. If the welder will put througheach weld automatically, a uniform product will be secured andlabor, time, and current will be saved. The automatic shut-off(Fig. i8, a) is a switch in the primary circuit which is thrownopen as soon as
Welding; theory, practice, apparatus and tests, electric, thermit and hot-flame processes . /. .1 B Fig. i8.—Two types of Thomson automatic break switches. panics supply mains are available in most manufacturingcentres. On account of the type of welds it handles, the Thomsonwelder is often made automatic. Suppose a welder is beingfed links of a chain to be welded. If the welder will put througheach weld automatically, a uniform product will be secured andlabor, time, and current will be saved. The automatic shut-off(Fig. i8, a) is a switch in the primary circuit which is thrownopen as soon as the clamps move together on the yielding current is not used any longer than is necessary to heat the joint. The break-switch shown in figure 18, a is used with the largerwelders, heavy currents being employed, and should be installed 50 WELDING at the back of the welder. The switch is out of reach and isoperated with the foot by the lever; this lever should run underthe base of the welder, the end projecting at the front of thewelder at a convenient place for the operator. The
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Keywords: ., bookcentury1900, bookdecade1910, bookpublishernewyo, bookyear1910
