Patent GB-190612236-A (GB)
Title: Improvements in and relating to Sewing Machines.
Filed: 1906-05-25
Granted: 1906-11-29
Abstract: 12,236. Marks, E. C. R., [Goldman, G.]. May 25. Sewing-machine work-supports; guiding materials; feed; governing needle tleread; presser-feet; stopping, automatic.-Relates to a machine for stitching a large number of similar articles, and consists in apparatus for automatically presenting the articles under the machine needle and for feeding them during the stitching in the prescribed manner. The articles are carried round by carriers 82, which are provided with a toothed periphery of a shape similar to the desired line of stitching. During the stitching operation, the carrier engaged is pressed by a spring into engagement with and is rotated by a wheel 93. The machine illustrated is adapted for sewing shoulder pads for coats and jackets. The pads are supplied to the carriers by a turntable 138, which is rotated intermittently by gear 146, 147 from the driving-wheel 31 of the carrier spider. The pads are placed in shaped recesses 142 in the table, and when the latter is positioned the pad under the carrier is lifted by a plate underneath it actuated by a lever 153 which rests on a cam 151 driven by gear 150. The carriers 82 are mounted on arms 70 of a spider 37, splined to a shaft 32, which carries a bevel-wheel 31. The wheel is driven by a pinion 30, Figs. 1 and 16, on a shaft 25, coupled to a driving-shaft 20 by a dog clutch 24. To produce the intermittent rotation of the carriers, no teeth are cut at one place on the pillion, and the wheel teeth are shortened at 39. At the same time that these parts come together, a roller 41 on a disk 40 knocks a lever 42 downwards, thereby actuating a lever 48. The lever 48 carries a bevelled disk 52, which presses against a similarly bevelled disk 22 on the shaft 20 and forces the shaft towards the left in opposition to a spring 28, and disengages the clutch. Further, a cam 57 raises a lever 53 and a pin 56 locks the teeth of the wheel. The carrier arms 70 are pivoted to slides 72 on the spider arms 37, so that they are free to move radially and swing vertically. During a large part of the rotation they are held up by plates 92 which slide upon a track 91. When a carrier is over a pad on the turntable, the plate 92 passes from the end of the track and drops over the pad, which it then carries on to the machine. Normally, the carrier arm is held in by a vertical track 75 on which a roller 74 runs. When it passes into line with the sewing-machine and the spider stops, the roller 74 is free to pass through a gap 76 in the track 75 and is pressed slightly outwards by a spring 73 to present the pad under the needle. Incidentally, the toothed periphery of the carrier is pressed-into engagement with the spur-wheel 93. This wheel is rotated, during the working of the sewing-machine, by ratchet gear 95 actuated from a cam 102. As the carrier is kept in contact with the wheel, the line of stitching will be of similar shape to the toothed periphery whether it is irregular or not. The carrier is rotated in opposition to a spring 86, and at the end of the stitching it is held by a latch 124 which drops into a recess 125. On the next partial rotation of the spider and carriers, the carrier passes over a gap in the table, the pad drops out, and the latch is lifted by a lug 136 when the carrier is rotated to its initial position. When the carrier is positioned, the sewing-machine is started by means of a bowl 110 which drops into a recess in the cam disk 40. This rotates a shaft 108 and a lever 111 on it, thereby allowing the machine clutch 10 to close. This shaft also, through the rods 116, 117, lowers the pressers 119 on to the pad and again applies the tension by withdrawing a lever 123. The sewing- machine had previously been locked by a rod 60, Fig. 17, and this is now removed by a lever 107 which is rotated by the end of the carrier coming into contact'with a lever 104. When the stitching is completed, the lever 104 passes from the carrier and-allows the rod 60 to fall into the way of a projection 65 and so to stop the machine positively. In stopping the machine, the rod 60 receives a blow and gives a sharp movement to a lever 62 and the shaft 45. This moves the lever 42 beyond the pin 41, permitting it to rise, thereby rotating the lever 48 and removing the bevelled disk 52 to allow the clutch 24 to close and the spider to resume its rotation. To prevent any rebound of the machine wheel as the rod 60 falls it knocks a lever 67 which then engages the rear of the projection 65. Thread-cutters; thread-end holders.- As the carrier 82 leaves the machine, it passes under and raises a threadcutter 137, Fig. 15, and when it falls again the end of the lever presses upon a plate 134 and nips the thread, and the knife 126 passing over the edge of the plate cuts the thread. The thread is then held until the next carrier raises the lever.