under hard usage fig3 6 show the detail of the thread guide 12 of fig1 which has all of the features listed as desirable as shown in fig3 the thread guide 12 includes a short straight length of cylindrical piano wire 81 attached by means of a quantity of solder 82 to the skirt 13 the longitudinal direction of the wire 81 is parallel to the axis of the skirt 13 and the wire extends from approximately the region at which the portion 17 of the front wall 14 intersects the skirt 13 to a point about half way back along the length of the skirt from the front wall 14 to the rear edge 83 a slot or passageway 84 in the outer surface of the cylindrical skirt 13 extends across the solder 82 at an angle of approximately 70 to 90 degrees with respect to the longitudinal axes of the wire 81 this slot is substantially in line with the aperture 39 in which the finger 38 extends as shown in fig1 and it is also substantially in line with the enlarged end of the slot 86 into which the bobbin thread is guided originally the slot 86 terminates rearwardly of the front wall.