Chemistry: electrical and wave energy – Processes and products – Electrostatic field or electrical discharge
Patent
1978-09-01
1979-11-13
Mack, John H.
Chemistry: electrical and wave energy
Processes and products
Electrostatic field or electrical discharge
2041296, 2041297, 204224M, 204286, 204297R, 204225, B23P 102, B23P 112
Patent
active
041742680
ABSTRACT:
An electrode guide is used in an apparatus for electrochemically drilling an axial hole in a longitudinally extending workpiece such as a suture needle. An electrode is telescopically received in one end of the tubular guide and the workpiece in the other. Electrically non-conductive inserts are provided in the guide to position the electrode and the workpiece in axial alignment. The depth of the hole to be drilled is limited by one of the inserts which abuts the end of the needle to prevent further axial motion when the hole has reached a predetermined depth. A plurality of the electrodes are disposed in a side by side arrangement. The inlet end portions of adjacent electrodes diverge to facilitate connecting an electrolyte conducting conduit to each electrode.
REFERENCES:
patent: 2764540 (1956-09-01), Farin et al.
patent: 3120482 (1964-02-01), Williams
patent: 3196093 (1965-07-01), Williams
patent: 3202598 (1965-08-01), Covington et al.
patent: 3326785 (1967-06-01), Williams
patent: 3990959 (1976-11-01), Payne et al.
Mack John H.
TRW Inc.
Valentine D. R.
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