Patent GB-191509718-A (GB)
Title: Improvements in and relating to Button Sewing Machines.
Inventor: GADBOIS JOSEPH EUSTACHE
IPC: D05B65/00
Filed: 1915-07-03
Abstract: 9718. Gadbois, J. E. July 3. Button-attaching machines. - The buttons to be stitched on are delivered through a shoot c to an eye - positioning device e, from which a slide k transfers them to a preser - foot F. A duplex machine is shown. the needle - bars D and shuttles E being driven from a belt pulley G on a sleeve G<2>, Fig. 4, by gearing G<3>, G<6>, G<9>, G<12>, Fig. 3. The button positioning and transferring device is actuated by a shaft J, Figs. 3 and 9 (an underside view), which shaft carries timing-cams. This shaft J is driven from a pulley H on a shaft H<2>, Fig. 4, by gearing H<3>, H<4>, J<2>. The belt L drives the pulley G during the sewing part of the machine cycle, and is then shifted automatically to the pulley H by a shifter connected to a bar s<3>, which is controlled by a cam s<2> on the shaft J. A stop u in the pulley H engages a ratchet surface in the pulley G, so that the pulley H is driven by the pulley G when the latter is driven by the belt, and the pulley H is driven independently by the belt when the pulley G is stopped. In this way, the pulley H and the connected shaft J are driven during the whole of the cycle, at the end of which a cam-actuated stop q<4> engages the stop u to stop the machine, whereas the pulley G, with its connected sewing-mechanism, is driven for part of the cycle only. The pulley G is stopped positively by a pin on it engaging the belt shifter arm s<3>. The belt L slips on the pulley H while the machine is stopped. The button-positioning device comprises a spindle e<3>, Fig. 7, driven by a belt e<4> from the shaft J. The top e carries pins e<2> corresponding to the holes in the button b. When, during the rotation, the pins engage in the holes, the spindle e<3> is pushed up by a spring e<7>. The rotation is stopped when the holes in the button are positioned by a lug e<8> on the pulley e<6> engaging a stop-shoulder on the sleeve g. The positioning-pins are then withdrawn by pushing down the sleeve g against the action of the spring g<3>. This is effected by a yoke g<5> actuated by a lever h pivoted at h<2>. This lever is actuated by a cam i on a lever i<2> carried by a rock-shaft i<3>, which is rocked by a push-bar i<4> and a cam i<6> on the shaft J. The positioned button is transferred to the presserfoot F by a slide k actuated by the upper end of the lever i<2>. The presser-foot F, Figs. 2a and 3, comprises two parts o pivoted at o<2> and held together by a spring o<3>. It is mounted on a spring F<2> so that it can be raised to the level of the buttonpositioner e by a rod m' operated by a cam m<6> on the shaft J. The presser-foot F and the tbroatplate C are both reciprocated during the sewing operation by connexions n, c<1>, c<4>, c<5>, c<2> with an adjustable crank-pin on a disk n<3> geared to the needle-driving shaft B<2>. The starting-lever T acts through the lever shown in Fig. 9 to withdraw the stop q<4> and move the rod M carrying the part s<3> to shift the belt L to the pulley G. Thread-cutters, comprising fixed blades w and pivoted blades w<2>, are actuated at the end of the sewing operation by an extension M<3> of the beltshifted rod M.