the plate 46 to be lifted against the action of the spring 49 when the lever arm 50 is swivelled about the screw 51 from the vertical position shown to a horizontal position the placing of the assembled unit in a top arm 56 of the sewing machine is shown in fig9 the unit has a so called three point mounting indicated by the three screws 19 20 22 fig1 the bar 18 passing through the frame 16 which also forms the bearing shaft for a thread take up 77 is placed in cast seats 57 in the top arm 56 and is held therein by the screws 19 20 in the lower part the frame is held to the top arm by means of the screw 22 which passes through the oblong hold 23 in the lug 17 the needle bar 38 and the presser foot plate 46 are adjusted in the length direction of the top arm 56 in relation to the hook and stitch plate of the machine in that the frame 16 is shifted on the bar 18 to the right or to the left in fig8 the position is locked by means of a stop screw 58 and the screw 22 respectively fig1 the adjustment of the needle bar and the presser foot in.