SEWING MACHINE Russian patent published in 1996 - IPC

FIELD: mechanical engineering. SUBSTANCE: sewing machine has needle guiding and looping mechanism, front disk carrier lead-away mechanism, stitch length and thread tightening control mechanism, forced lubrication device, feeding mechanism having device for stepless control of front disk carrier speed. Machine is further provided with upper and lower flywheel clutches. Lower flywheel clutch is axially aligned with rear disk carrier and upper flywheel clutch is mounted on vertical shaft. Motion is transmitted from lower flywheel clutch to upper flywheel clutch through guide, which is fixed on end of movable casing of lower flywheel clutch of slide with finger received in opening of fork mounted on lower end of vertical shaft. Upper flywheel clutch is kinematically connected through carrier mounted gear, idle gear and gear mounted on shaft, carrying gear axially aligned with front disk carrier. Shaft of front disk carrier is positioned in needle plate fixed in movable support carrying shaft with two gears secured on its ends. Support is connected with front disk carrier lead-away mechanism and upper end of support is pivotally connected with carrier shaft through plate with needle gear fixed in it. Sickle-shaped lever engageable with slide finger is mounted in case upper part on shaft carrying lever, which is pivotally connected with electromagnet of front disk carrier speed control unit through tie-rod. EFFECT: increased efficiency, simplified construction and enhanced reliability in operation. 4 cl, 11 dwg