23 HOUSEHOLD AND INDUSTRIAL SEWING MACHINES, DARNING, EMBROIDERING, HEMSTITCHING, BUTTONHOLE MAKING, BUTTON FEEDING, ARTICLE FASTENING, BOBBIN WINDING, STRIP CUTTING, STRIP WINDING, PRESSING, THREAD DRAWING, QUILTING, FULLING, RUFFLING, BINDING, SHOEMAKING, TAPING AND GRINDING MACHINES; SHAFTHANGERS, SHAFTING, COUNTERSHAFTS, SEWING MACHINE NEEDLES; AIR BLOWING APPARATUS FOR NEEDLE COOLING AND LINT DISPERSING, NEEDLE COOLING DEVICES, BELT PUNCHES, BELT TIGHTENERS FOR TAKING THE SLACK OUT OF POWER TRANSMISSION BELTS; SCISSORS, PINKING SHEARS, SCREWDRIVERS, CCLAMPS, WORK HOLDING IMPLEMENTS FOR MAINTAINING A WORK-PIECE IN OPERATIVE RELATION WITH A SEWING MACHINE, CUTTER BLADES, FINGER GUARDS IN THE FORM OF SCREENS TO PREVENT AN OPERATOR'S FINGERS FROM ENGAGING A MOVING MACHINE ELEMENT, THREAD LUBRICATORS IN THE FORM OF RECEPTACLES ADAPTED FOR CONTAINING A THREAD LUBRICANT, STILETTOS, SEAM RIPPERS IN THE FORM OF A KNIFE, INSPECTION MIRRORS AND FAGOTING UNITS ABOUT WHICH CORDS MAY BE WOUND BEFORE STITCHING SAME; SEWING MACHINE ATTACHMENTS-NAMELY, EMBROIDERY, BLIND STITCH, GATHERING, RUFFLING, BUTTONHOLER, QUILTING, PRESSER FOOT, ZIPPER FOOT, DARNING FOOT, BIAS BINDING AND THREAD-CHAIN CUTTING ATTACHMENTS; SEWING MACHINE TABLES AND STANDS; TYPEWRITERS; RUG CLEANING FLOOR POLISHERS; AND PARTS THEREOF