Volltext Seite (XML)
2^ INTERNATIONAL EXHIBITION, 1876. links, and were consequently positive. The feeding device was moved positively in all directions, and was controlled, as to the extent of movement, by a screw above the cloth-support. The bearings for the main and other shafts, and the shuttle-carrier slide (V-shaped in cross section), and the straps of the eccentrics were all made to com pensate for wear of the parts. The needle-bar and needle and shuttle co-operated to draw up and complete each stitch independently. In stitching leather, one purpose for which the new machine is especially adapted, some operators at times desire to employ a needle common to some other machine, and to permit this change the needle-shank was held in a nipple-like holder, confined by a screw at the lower end of the needle-bar. These holders are each provided with an opening of proper shape for some particular needle, and a number of them may accompany one machine. The threads were drawn, with relation to each other, substantially as in the Howe. The Wilson Sewing-Machine Co., Chicago, III. This company exhibited its shuttle-machine. The needle-bar was reciprocated by a vibrating arm or elbow-lever, provided at its lower end below the cloth-support with a heart-shaped cam-slot, into which projected a crank-pin, at the end of a short horizontal main shaft, at right angles to the overhanging arm. A short arm, carried by this shaft, was connected by a link with a shuttle-driver that acted to pro pel the shuttle in the race-way parallel with the overhanging arm, and at right angles to the direction of movement of the four-motioned feed. An eccentric on the main shaft actuated a slide-bar provided with inclines to impart to the feeding device its upward and forward motions, a spring which caused it to descend and return to the vari able back-stop determining the length of stitch. The Domestic Sewing-Machine Co., New York, N. Y. This company exhibited the machine known as the “Domestic,” as well as one constructed after the same general plan for leather stitch ing; and before the close of the Exhibition they included within their exhibit the Grover & Baker machine. The “ Domestic” employs a straight needle and shuttle, and makes the lock-stitch. The main rotary shaft having a large balance-wheel, and being mounted in the overhanging arm, is provided with a crank-pin to enter a heart-cam upon and to reciprocate the needle-bar, giving it the usual dip motion. The shuttle is moved by a carrier at the end of a horizontally vibrating arm, having its short end forked to receive a ball attached to the lower end of a vertical lever, bifurcated at its upper end to embrace an eccen-