Abstract: A rotary cutter head mounted on the end of a handle to power rotate at high speed one or more centrifugally whirled free ends of a reserve of nylon line wound on a spool co-axially pivotally mounted within the head.A co-axially spring biased indexer is subject to inertia applied through the handle while the device is running to effect the feedfing of precise increments of line from the spool to the free line ends. The indexer is automatically self-inhibiting when the line ends reach a predetermined optimum length of approximately eight inches and continues to be self-inhibiting until the line ends wear down, in use, to less than a predetermined minimum length of approximately five inches.

Abstract: A rotary cutter head mounted on the end of a handle to power rotate at high speed one or more centrifugally whirled free ends of a reserve of nylon line wound on a spool co-axially pivotally mounted within the head.A co-axially spring biased indexer is subject to inertia applied through the handle while the device is running to effect the feeding of precise increments of line from the spool to the free line ends. The indexer is automatically self-inhibiting when the line ends reach a predetermined optimum length of approximately eight inches and continues to be self-inhibiting until the line ends wear down, in use, to less than a predetermined minimum length of approximately five inches.

Abstract: A line supply spool rotatably confined co-axially within a thin housing shell having a splined mounting on a polygonal arbor through which said housing shell is supported at the lower end of a manually held engine powered handle while the shell is being spun at a high speed on a vertical axis. Free line ends are progressively fed peripherally from the spool through equally spaced windows provided in the housing shell by controlled rotation of the spool relative to the housing shell, the control of the rotation of the spool being optionally effected manually while the tool is shut down or automatically while the tool is spinning, the election being made by a minor selective shifting of a few parts, this election being readily reversed, whenever desired.

Abstract: A line supply spool rotatably confined co-axially within a thin housing shell having a splined mounting on a polygonal arbor through which said housing shell is supported at the lower end of a manually supported engine powered handle while the shell is being spun at a high speed on a vertical axis, free line ends being progressively fed peripherally from the spool through equally spaced windows provided in the housing shell by controlled rotation of the spool relative to the housing shell.The housing shell comprises two like die cast halves which abut each other in a medial radial plane with which the line feeding windows are symmetrically related. Each window is formed by two matching notches including four cups enclosing opposite ends of two tubular closely parallel line guiding rollers. Cast integrally with the four cups are four co-axial stub shafts on which the hollow rollers are centered internally.

Abstract: A rotary cutter head mounted on the end of a handle to power rotate at high speed one or more centrifugally whirled free ends of a reserve of nylon line wound on a spool co-axially pivotally mounted within the head.A co-axially spring biased indexer is subject to inertia applied through the handle while the device is running to effect the feeding of precise increments of line from the spool to the free line ends. The indexer is automatically self-inhibiting when the line ends reach a predetermined optimum length of approximately eight inches and continues to be self-inhibiting until the line ends wear down, in use, to less than a predetermined minimum length of approximately five inches.