Abstract: A tool for implanting radioactive seeds for therapeutic purposes into living tissue such as a prostate gland includes an elongate hollow needle, an elongate hollow sleeve, and an elongate push rod. A plurality of axially aligned seeds and spacers are loaded into the sleeve, the sleeve is slideably inserted into the hollow needle, the needle is introduced into the tissue at a preselected site, and the push rod is used in a procedure that implants one or more seeds and spacers into the tissue. The sleeve is transparent or translucent so that the number of seeds and spacers remaining within the sleeve at any time is visually ascertainable.

Abstract: In an open end spinning apparatus for converting staple fibers into yarn, the apparatus comprising a rotor having a rotatable surface to which a substantially parallel array of the fibers is fed substantially along the axis of the rotor and by engagement with which the fibers are twisted together, the improvement comprising a needle non-rotatably mounted adjacent the rotor and having a free end impinging on the path of travel of the array of fibers to the rotor and being directed obliquely of the rotor axis in the direction of the rotor, whereby the needle engages the array of fibers and thereby holds back the fibers at that point from co-rotating with the fibers engaged by the rotor.