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US Patent: 3,862,391
Method And Apparatus For Removing Material form a Workpiece
Patentees:
Oscar C. Blomgren, Sr. (exact or similar names) - Lake Bluff, IL
Oscar C. Blomgren, Jr. (exact or similar names) - Lake Bluff, IL

USPTO Classifications:
219/68, 82/900, 83/171

Tool Categories:

Assignees:
Inter-Probe, Inc. - North Chicago, IL

Manufacturer:
Not known to have been produced

Witnesses:
none listed

Patent Dates:
Applied: Dec. 20, 1973
Granted: Jan. 21, 1975

Patent Pictures:
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Description:
Lockwood, Dewey, Zickert & Alex - patent attorneys

Abstract

Method and apparatus for removing material from an electrically conductive workpiece, including a material removal tool mounted adjacent to and in material removal relation with a rotatably supported and driven workpiece, a probe electrically insulated from the tool and workpiece having a tip end spaced adjacent to the workpiece and tool but closer to the workpiece than the tool, and a high-voltage D.C. source connected between the probe and the tool and producing a potential level sufficient to create an electrical arc between the tip end of the probe and the workpiece.

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