Engineering topics
Publications and source records attributed to Spiegel, K. W..
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.
Damage to workpiece by excessive current in electron-beam welder is prevented by mechanism that accurately adjusts anode-to-cathode spacing. Mechanism is installed on standard Sciaky (or equivalent) electron-beam gun with only minimal modification. By turning knurled knob and observing digital readout of anode/cathode separation, machine operator adjusts welder for safe maximum current before welding begins.