GB671603A - Improvements in or relating to sewing machine attachment - Google Patents

Abstract

671,603. Sewing-machines. GREIST MANUFACTURING CO. April 20, 1950 [May 4, 1949], No. 9722/50. Class 112. A sewing-machine attachment for moving the work laterally at regular intervals to produce an offset stitch and holding it in position for straight-line stitching between such lateral movements comprises a work-holding foot 44, Fig. 2 (plan view), pivoted to a frame 13 about a vertical axis, and needle-bar-actuated means including a cam 21 for moving the foot laterally at the required times. The frame 13 is secured to the presser-bar by the usual means, and the shaft carrying the cam 21 is rotated in the usual way by pawl-and-ratchet gear actuated by an arm connected to the needle-bar; the cam comprises two discs 25 of the required form secured non-rotatably on shoulders of a hub fixed on the shaft. A pin 37 on the tail of the foot 44 projects through a slot in the frame to engage between the cam discs, and the end of the tail is guided by a slot therein engaging a headed pin 41 depending from the frame 13. The foot has a T-shaped needle slot 47, and the toe 58 on one side of the slot is turned up abruptly while that on the other side rises in a gradual curve to facilitate passing over a fold in the work. An adjustable guide 48 is carried on the foot to engage the folded edge of an upper piece of fabric which is caught at intervals by the offset stitches to a hem being formed on another piece.