GB218217A - Sewing machine - Google Patents

Abstract

218,217. Fairweather, W., (Singer Manufacturing Co.). Jan. 23, 1924. Hem-stitching machines; needles, vibrating laterally; needle guides; feed by dogs; upper and lower shafts, connecting.-In a hem-stitch sewing-machine, jogging movements are communicated to the needle and the feed mechanism and loop-taker mechanism are actuated from concentric shafts situated below the work-plate. The needle-bar 8 carries a bracket on which are mounted piercers and a pivoted bracket 16 carrying the needle 19. The bracket 16 is oscillated by a rod 20 secured thereto and passing through a slot in an arm 22 pivoted at 23 and connected by a ball-and-socket joint to a rod 31 pivotally connected to a crank 34 projecting from an oscillating shaft 40 which is actuated by a cam 69 mounted on a shaft 46. The shaft 46 is driven from the main shaft 5 by one to three belt gearing 41, 43, 44 and surrounds a shaft 54 driven from the shaft 5 by one to one gearing. The shaft 54 drives, through a two to one bevel gear 58, 59, a shaft 60 carrying a loop-taker 61 and threadspool. An eccentric 64 on the shaft 60 actuates a needle-guard 66. The shaft 46 in addition to actuating the needle-jogging device drives the feed mechanism through cams 72, 73. The cam 72 oscillates a lever 76 having a feed-adjusting slot therein for the connection of a link 83 which oscillates a shaft 85. A crank 86 on the shaft carries a feed-dog support 88. The cam 73 cuts through a lever 94 to oscillate a shaft 93 having an arm 92 which enters a slot in the member 88 and effects the vertical movement thereof. The concentric shafts are lubricated through passages 97 - - 100 in the frame and the bushing of the shafts.