Patent GB-190318153-A (GB)
Title: Button-hole Cutting and Stitching Machine
Inventor: FAIRWEATHER WALLACE
Filed: 1903-08-22
Granted: 1903-12-03
Abstract: 18,153. Fairweather, W., [Singer Manufacturing Co.]. Aug. 22. Buttonhole - sewing machines buttonholes, cutting ; stopping-year; stopping, automatic.-Relates to buttonhole cutting and sewing machines of the type described in Specification No. 20,358, A.D. 1902, and consists in providing a starting and stopping gear and cutting- mechanism in which the cutter is operated from the stopping gear. The starting and stopping gear or motion comprises a pivoted lever 101, Fig. 1, carrying a vertically-moving rod 102 which is forced up into the position shown by a spring 109. In operation the upper end of the rod 102 enters a notch in the cam 103 which is yieldingly connected to the fast pulley 104 by means of a spring 64. The rod is also fitted with a belt-shifting arm 106, and with a second arm 107 connected to a treadle-operated rod 108, by means of which the machine is started. The stop-motion lever 101 is held in an inoperative position as shown, against the pressure of a spring, by a spring-actuated latch or lever 112 which engages a notch in the rod 108 ; a tripping-lug on the feed-wheel 60 engages a toe-piece of the lever 112, and releases the rod 108 automatically when the machine is to be stopped and a buttonhole cut. The tce-piece may be adjusted on the lever 112 for different lengths of buttonholes. The cutter 137 is carried on a block 138 which is attached to a sliding cutter-bar 139 worked by means of levers 141, 66 from the rod 102 of the stop-motion. The end of the actuating-lever 66 is slotted to receive a pin or roller-stud 68 on a projecting arm of the rod 102. The cutteroperating lever 141 is provided, at its rear end, with a stud 75 entering a slot in a link 65 pivoted on the lever 66. A connecting-lever 70 is pivoted to the link, and is notched, at the point 71, to engage the stud 75. The arm 72 of the connecting- lever 70 rests normally on the toe-piece 91, Fig. 5, of a latch-lever 86, the cutting-apparatus being then in its inoperative position. A cam 89, fixed on the feed-wheel shaft 90, is provided with a projection, the action of which is timed to disengage the arm 72 and allow the connecting- lever 70 to fall back by the aid of the spring 74 to engage the lever 141 and the lever 66, just before the stop-motion lever 101 is released on the completion of the stitching and barring of the buttonhole. When the lever 101, Fig. 1, is released, the rod 102 passes into the path of the cam 103 which forces the rod down, thereby operating the levers 66, 141 and the cutting-mechanism. The same movement of the lever 101 shifts the driving-belt from the fast pulley 104 to the loose pulley 105 ; subsequently the end of the rod 102 passes into a notch in the cam 103, and stops the machine. To stop the machine, in case of breakage of the thread, the stop-motion is operated manually by means of a thumb-lever 77 which, when pressed, disengages the latch-lever 112 from the notched rod 108. To stop the machine without operating the cutter, while the connecting-lever 70 is in its actuating-position, the lever 70 is drawn back by hand to release the operating-lever 141.