In this subclass, the groups designating sewing apparatus or machines cover also sewing processes dependent on their use, and the thread seams produced thereby. TYPES OF MACHINES General types for making thread seams without lateral movement Special-purpose or automatic machines with lateral movement of needle or work for sewing quilts or mattresses, sacks, leather goods , , for temporarily connecting articles linking machines; hem-stitch machines; for making thread and welded seams ; ; programme-controlled , Other types of sewing machines Combination of machines; machines incorporating devices for other purposes than sewing ; THE WORK; MACHINE ELEMENTS RELATING THERETO For feeding, pressing, holding, supplying, or removing the work , , , Devices for slitting, grooving, or cutting the work Work-piece carriers, work- collecting devices , Other elements relating to the work SEWING-THREAD; MACHINE ELEMENTS RELATING THERETO Needle thread spool-pin assemblies measuring length of thread used; regulating tension; severing thread ; ; take-up, needle-thread guard, break detectors, thread laying; needle holders , , ; Lower thread loop takers; loop manipulators; tension; severing thread ; ; ; bobbin winding or changing Lubricating, waxing, or colouring thread OTHER ELEMENTS OF SEWING MACHINES; ACCESSORIES Driving or control; lubricating or cooling; lighting equipment ; ; Accessories guards for operator casings; frames or tables; covers or portable enclosures ; ; HAND SEWING Tools and accessories; stitches or stitch seams ; Preparatory or finishing operations Hand-sewing processes and apparatus for other special work, or not otherwise provided for NEEDLES; NEEDLE-THREADING DEVICES; SEAM-RIPPING ; ;