US PATENT SUBCLASS 205 / 646
.~ With programmed, cyclic, or time responsive control

Current as of: June, 1999
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205 /   HD   ELECTROLYSIS: PROCESSES, COMPOSITIONS USED THEREIN, AND METHODS OF PREPARING THE COMPOSITIONS

640  DF  ELECTROLYTIC EROSION OF A WORKPIECE FOR SHAPE OR SURFACE CHANGE (E.G., ETCHING, POLISHING, ETC.) (PROCESS AND ELECTROLYTE COMPOSITION) {19}
646.~ With programmed, cyclic, or time responsive control {5}
647  DF  .~.~> Including nonelectrolytic erosion
648  DF  .~.~> Using diverse-type tool electrodes
649  DF  .~.~> Eroding workpiece to match nonplanar surface shape of tool electrode
650  DF  .~.~> Cleaning, recycling, or reusing electrolyte
651  DF  .~.~> Moving tool or workpiece

DEFINITION

Classification: 205/646

With programmed, cyclic, or time responsive control:

(under subclass 640) Process which is not directly responsive to a sensed condition, but involves (a) storing coded instructions or other data which is used to regulate the process, (b) repetitively regulating a sequence of process steps, or (c) regulating the process according to preset timing sequences (e.g., limiting various process steps to predetermined durations of time, etc.).

(1) Note. This subclass and the subclasses indented hereunder are not intended to include the use of alternating current (AC), per se, or the use of direct current (DC) pulses which are not clearly repetitive (i.e., with multiple complete cycles) or predetermined.

SEE OR SEARCH THIS CLASS, SUBCLASS:

641+, for electrolytic erosion with control responsive to a sensed condition.

652+, for electrolytic erosion in which the tool-workpiece gap is either specified or maintained constant; but without using programmed, cyclic, or time responsive control.