Welders-those hooded men and women whose torches spit out electric-blue and white-hot arcs-began making themselves known in industrial Chicago shortly after the turn of the century, when steel was ...

Photo: Chicago Tribune Archives. On the opening day of Chicago's nine miles of pneumatic tubes, in 1904, the postmaster and two senators celebrate the future of mail delivery—and, maybe, public ...

Evaluating process repeatability, the OEM performed a weld on a polycarbonate filter housing using Dukane’s servo-controlled system and then a pneumatic system. The OEM measured an average standard ...