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26 INTERNATIONAL EXHIBITION, 1876. each member of which was so placed as to be acted upon by one of two cam-surfaces formed on the periphery of the disk that carried the needle-bar-moving crank-pin. A spring pressed the upper member of the form constantly toward its cam. This thread-controller was free to yield to the strain of the thread upon it, except at such times as the lower member of the V-shaped fork was acted upon by its cam- wheel, which was the case just as the needle tightened the stitch. This take-up is fully described in patent No. 164,179. The Remington Co. also exhibited an ingenious button-hole machine, made under United States patents to S. Cleminshaw, Nos. 110,739, 128,363, and 139,770. This machine employed a single thread, contained in a shuttle held in a recess at the lower end of a vertically reciprocating bar, the shuttle having at its lower end an eye- pointed perforating needle. The shuttle-thread was led through the eye of the needle. The needle penetrated the material just back of the edge of the button-hole slit, a loop was formed in its thread, the loop was drawn out, and a thread-catcher drew this loop up through the button-hole slit and passed it over the upper end of the shuttle. The block and needle were then lifted through this loop. In this way the shuttle was caused to pass through a loop made in its own thread. The piece of fabric provided with the slit for the button-hole was passed over a finger-like post, where it was confined by a pair of jaws while the edges were being stitched. This machine appeared to be adapted to work a very good button-hole in cotton goods or linen, a difficulty heretofore experienced in other button-hole machines. The Remington Co. also exhibited a button-hole attachment adapted to be applied to the head of the machine, and made under patents Nos. 94,212, 103,745, and 146,000. The attachment was composed of a looper, placed at an angle to the movement of the usual needle adapted to penetrate the fabric back from the edge to be worked. This looper had an eye at its lower end, and passing through the button-hole slit in its descent, placed its eye below the cloth-support and fabric, in the path of movement of the descending needle, where it rested until the needle penetrated the fabric and entered the hole in the looper. The shuttle then passed through the loop of needle-thread, and the needle was raised, drawing the shuttle- thread up with it through the eye of the looper, when the looper was drawn up, bringing the shuttle-thread; when this loop of shuttle- thread was drawn above the edge of the fabric, a finger engaged and carried it back over the edge, upon the upper side of the material, where it was entered by the needle in its next descent. The needle entered the hole in the looper at each descent.