Engineering topics
Publications and source records attributed to Macfarlane, D. I..
Detector using two whirling wires measures focus of beam in electronbeam welder. Multiple-wire beam-sampling method provides for simple nullmeter focus indication easily controlled by operator. Detector not only operates at high beam currents but eliminates need for oscilloscope.
Fused wire in weld root area verifies weld penetration in electron-beam-welded joints. Method could be used in automotive, aircraft, and machinery manufacturing when electron-beam-welds cannot be inspected ultrasonically.
Gold plate beneath weldment reveals areas of excess penetration during X-ray inspection. Technique is applicable to critical electron-beam welds, such as those in gas turbines and pressure vessels.