Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics (1892)
Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 940
- simply governing the time which will be consumed in heating to that plas-ticity The pressure to be applied in effecting butt welds electrically varies with the materialand section of the pieces at the weld. It is with steel about 1,800 lbs. per sq. m.; withwrouo-ht-iron about 1.200 lbs.; and for… … Fig. 3. l\.\<Ut>\ir<0 -Indirect electric welder. alternating currentsat about ;:300 volts,and of a periodicityof about 50, or 100alternations per sec-ond. Where but asingle welder hasbeen employed ithas been customaryto regulate the weld-ing currents by va-rying the field-ex-citing current…
Mechanical engineering
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