Other

Peter John Flinn

Samuel Chatterley

Charlie Maurice Levitt

A method of cutting a material, which may be insulating or conducting, which includes the steps of placing a pair of parallel spaced electrodes, preferably taking the form of a pair of wires, close to or in contact with the material, applying a voltage across the electrodes and causing relative movement between the electrodes and the material as the spark erodes the material to effect the cut. The invention also provides apparatus for carrying out this method.

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Transvaal, South Africa

Peter John Flinn