Helically fluted deep hole cathode and method of making same

Details Helically fluted deep hole cathode and method of making same Helically fluted deep hole cathode and method of making same

1975-01-16

1977-01-11

Van Horn, Charles E.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

29456, 29592, 57162, 156297, 427 77, 427105, 427355, 427410, B32B 508, B32B 3116

Patent

active

040025187

ABSTRACT:
A helically fluted deep hole cathode which is fabricated by helically winding at least one thread member around a dielectrically coated cathode tube and then applying a layer of electrical insulation over the tube and thread member so wound and wherein, preferably, the helical flutes commence about the distance of the diameter of the electrode tip from the tip and are selectively formed or machined after forming to have a flute diameter approximately .001 inch to .002 inch smaller than the diameter of the hole to be cut so that the flutes support the electrodes in the deep hole during the cutting operation and provide an egress route for the electrolyte and removed workpiece material to depart the hole area during the hole drilling process.

REFERENCES:
patent: 1329630 (1920-02-01), Reinhold
patent: 1457295 (1923-06-01), Bado
patent: 1946603 (1934-02-01), Von-Wedel
patent: 3120482 (1964-02-01), Williams
patent: 3152618 (1964-10-01), Rothermel et al.
patent: 3240645 (1966-03-01), Friedwald et al.
patent: 3243365 (1966-03-01), Aikin
patent: 3485744 (1969-10-01), Schaffner
patent: 3671348 (1972-06-01), Kemsey-Bourne
patent: 3696014 (1972-10-01), Goodard et al.
patent: 3795604 (1974-03-01), McKinney et al.
patent: 3880745 (1975-04-01), Shaw

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