Movement No. 110 converts uniform rotary motion into uniform rectilinear traversing motion, used in spooling frames to guide thread evenly onto spools. A roller is divided into two sections — one cut with a right-hand screw thread and the other with a left-hand screw thread. A spindle running parallel to the roller carries two arms, each fitted with a half-nut: one half-nut engages the top of the roller and the other engages the bottom. At any given moment, only one half-nut is in gear while the other is disengaged. By pressing a lever to the right or left, the operator selects which half-nut engages — and therefore which thread direction drives the traverse rod — allowing the rod to move in either direction at will. This clever mechanism enables smooth, controllable, and instantly reversible linear traversing motion from a single continuously rotating roller, making it ideal for precision thread and wire winding applications.
110. Uniform circular into uniform rectilinear motion; used in spooling-frames for leading or guiding the thread on to the spools. The roller is divided into two parts, each having a fine screw thread cut upon it, one a right and the other a left hand screw. The spindle parallel with the roller has arms which carry two half-nuts, fitted to the screws, one over and the other under the roller. When one half-nut is in, the other is out of gear. By pressing the lever to the right or left, the rod is made to traverse in either direction.