US PATENT SUBCLASS 219 / 69.11
.~.~ Electric spark machining

Current as of: June, 1999
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219 /   HD   ELECTRIC HEATING

50  DF  METAL HEATING (E.G., RESISTANCE HEATING) {19}
68  DF  .~ Cutting or disintegrating (e.g., machining engraving) {2}
69.11.~.~ Electric spark machining {10}
69.12  DF  .~.~.~> Wire cutting
69.13  DF  .~.~.~> Circuits
69.14  DF  .~.~.~> Dielectric composition and purification
69.15  DF  .~.~.~> Electrodes
69.16  DF  .~.~.~> Gap spacing control
69.17  DF  .~.~.~> Methods
69.18  DF  .~.~.~> Pulse
69.19  DF  .~.~.~> Safety circuits
69.2  DF  .~.~.~> Vibrating electrodes or workpiece
70  DF  .~.~.~> Hand-type tools

DEFINITION

Classification: 219/69.11

Electric spark machining:

(under subclass 68) Subject matter utilizing a brief electric space discharge between an electrode and a work piece (i.e., A. C. voltage).

(1) Note. This subclass and the subclasses indented hereunder were formerly unofficial digests. Hence, the placement of documents therein might not reflect schedule hierarchy.

SEE OR SEARCH CLASS

204, Chemistry: Electrical and Wave Energy, appropriate subclasses for apparatus and methods of electrochemical machining.