GB207386A - Improvements in presser feet for sewing machines - Google Patents

Abstract

207,386. Thompson, W. P., (Union Special Machine Co.). Dec. 6, 1922. Sewing-machines; presser-feet are formed with a fixed main section and two yielding sections one on each side of the main section, such being particularly adapted for machines making a flat covered seam and using three needles with a looper thread on one side of the seam and a covering thread on the other side. The main section 13 extends mainly in rear of the needles and the side sections 14, 15 extend to a point in front of the needles. An outer projection 20 on the section 13 also extends alongside and in front of the needles and is slotted at 24 to receive the stationary member of a trimming mechanism cooperating with a movable member carried by an arm. The section 14 is received in a recess 27 and has an upwardly extending shank 28 in which is a. spring 29 adjustable by a screw 31. An auxiliary section 35 is mounted on a spring- pressed arm 36 and projects through an opening 34 in the section 14 which also carries an arm 39 with upper thread guides 40 which assist in the formation of the covering stitches and in chaining off. The section 15 is carried by a shank 41 secured against the section 13 by a screw 48 and pressed by a spring 45. The inner faces 47, 49 of the sections 14, 15 are curved and bevelled to receive the. upturned edges of the fabric sections, direct them to the trimming mechanism and after they are trimmed turn them down into overlapping relation. The part 45 overlies the part 49 to some extent as shown in the underneath plan, Fig. 4.