GB167023A - Sewing machine - Google Patents

Abstract

167,023. Fairweather, W., (Singer Manufacturing Co.). May 19,1920. Sewing-machines; feed by wheels and other rotary devices and by needles.-Continuous rotary movement is imparted to a pair of rollers 30, 31 mounted beyond the stitching point and the needle is positively vibrated in the direction of feed. The lower roller turns in fixed bearings, and then two rollers are actuated by the toothed gearing shown. The upper roller is supported upon the spherical end 50 of a lever arm 47 pivoted at 49, and is driven by a shaft comprising end portions 54, 46<a> secured to the roller and the spur-wheel 45 and an intermediate portion 46 mounted in the arm 47 and connected to the end portions by universal couplings 58. It is maintained parallel to the lower roller by means of a sleeve 69 pivoted to a lever 72. The levers 47, 72 have depending arms 48, 74 suitably proportioned and connected to a lever 63 which may be depressed by a needle 68. A locking device, not shown, is fitted to the lever 63. A bracket 77 is formed with a guiding surface against which the lever arm 47 bears, and is thereby prevented from lateral movement. The presser-bar 15 and needle-bar 7 are mounted in a frame 8 pivoted at 18 and oscillated by a cam-actuated lever 22.