23 FAMILY AND COMMERCIAL SEWING MACHINES; DARNING, EMBROIDERY, ARTICLE FASTENING, HEMSTITCHING, BUTTONHOLE MAKING, EYELETING, AND ORNAMENTAL STITCHING MACHINES; BOBBIN WINDING, STRIP CUTTING, TRIMMING, AND BENCH GRINDING MACHINES; SEWING MACHINE NEEDLES; BELT PUNCHES, HONDING DEVICES FOR SHARPENING KNIVES AND BLADES, BELT TIGHTENERS FOR TAKING THE SLACK OUT OF POWER TRANSMISSION BELTS, SCREW DRIVERS, HAND AND POWER OPERATED CLOTH PINKING MACHINES, CLOTH GRIPPERS FOR SECURING A WORK-PIECE TO OR UPON A TABLE, FINGER GUARDS IN THE FORM OF WIRE OR GLASS SCREENS TO PREVENT AN OPERATOR'S FINGERS FROM ENGAGING A MOVING MACHINE ELEMENT, C-CLAMPS, TWEEZERS FOR SEWING USE, AND SEAM RIPPERS; FAGOTING UNITS ABOUT WHICH CORD MAY BE WOUND BEFORE STITCHING SAME; SEWING MACHINE ATTACHMENTS-NAMELY, EMBROIDERY, BRAIDING, BLIND-STITCH BRAIDING, FLANGE HEMMING, SHIRRING PLATE, TUBULAR TRIMMING, TUCKING, CORDING, ZIPPER FOOT, DARNING FOOT, UNDERBRAIDING, BIAS BINDING, SCROLL HEMMING, AND THREAD-CHAIN CUTTING ATTACHMENTS; SEWING MACHINE POWER TABLES, AND STANDS, AND PARTS THEREOF