US PATENT SUBCLASS 83 / 38
.~.~ Cyclically varying rate of tool or work movement


Current as of: June, 1999
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83 /   HD   CUTTING

13  DF  PROCESSES {17}
37  DF  .~ During movement of work past flying cutter {1}
38.~.~ Cyclically varying rate of tool or work movement


DEFINITION

Classification: 83/38

(under subclass 37) Process which includes a step of changing either the speed of the tool during a portion of its cyclic travel, (i.e., toward, from, or concurrent with, the moving work) or the speed of the work as it traverses the cutting zone.

(1) Note. Oscillating and reciprocating tools of necessity have a period of nonuniform rate of travel due to the reversals of direction. Since such tools inherently operate in this manner, patents for methods of operating them have not been included in this subclass and will be found in other subclasses indented under subclass 13. However, all patents for methods of operating unidirectionally moving rotary tools which start their cycle of movement from a position of rest have been placed here because of the difficulty distinguishing between rotary tools which stop and those which merely slow down.

SEE OR SEARCH THIS CLASS, SUBCLASS:

238+, for means to feed work unequally in recurring series.

313, for a flying cutter with means for cyclically varying the work-feed speed.

324, for a flying cutter with means for cyclically varying the tool speed of an orbitally moving tool. 617, for a tool having means to vary the force or speed of the tool stroke.