Patent GB-190107393-A (GB)
Title: Automatic Embroidery Machine.
Inventor: MILLS BENJAMIN JOSEPH BARNARD
Filed: 1901-04-10
Granted: 1902-02-27
Abstract: 7393. Mills, B. J. B., [Soc. Anon. de Broderie Automatique]. April 10. Embroidery, machines for. Relates to a continuous shuttle embroidery machine, and consists of automatic means for moving the frame, of means to facilitate changing the shuttles, and in arranging the needles to carry the locking-thread and the shuttles the decorative thread. Two similar jacquard mechanisms are provided, one of which moves the embroidery frame vertically and the other horizontally. Fig. 2 shows one of these mechanisms, and Figs. 3 and 4 sections on the lines a-a and b-b respectively. The shaft j is rotated an amount determined by the pattern, and gives a corresponding movement to the frame through the pinion f and chain f<1>. This rotation of the shaft j is obtained from a lever k, through pawls n, p, t, selected by the jacquard. Each series of pawls is in two oppositely-disposed sets, as shown in Fig. 3 in the case of the pawls n. The pawls n are carried by arms moved directly by the lever k, and engage stepped teeth m of sectors loose on the shaft j and carrying the pawls p. The pawls p engage the sectors r similar to the sectors l and carrying the pawls t which engage the third pair of steps u formed on a wheel v fast on the shaft. The depth of each step u is equal to the sum of the steps l, and each step l is equal to the sum of the steps m. Before each stitch a pair of each of the three series of pawls is selected by a lever z, the inner end of which bears on an ordinary perforated pattern sheet running over a perforated cylinder x. An abutment 1 on the selected lever z prevents the two pawls from falling clear of their steps, spring stops 4 retaining them in this operative position. The first part of the movement of the lever k is effected by a rod 5 through a spring 6, which is not strong enough to overcome the brake 8 on the wheel v, and thus only moves the lever k far enough to bring the pawls into contact with their respective teeth. The movement of the lever k is completed by the device shown in Fig. 4. An elbow lever 10 has pivoted to it at 13 a double segment 11, 12, which can be rigidly clamped to the lever 10 by a spring- actuated toggle brake 14. In the initial position shown, the brake is off, owing to the engagement of the elbow lever 18 with a fixed stop 19, so that the segment 11, 12, under the influence of a spring 17, is free to follow the lever k in its movement described above, to, say, the position 11<a>. On the rod 15 being then depressed, the lever 18 leaves the stop 19, the brake 14 is applied, and the segment 11, 12, thus becoming clamped to the lever 10, is wiped under the roller on the end of the lever k until the centre of the arc 11 is under that roller. The total movement of the lever k is thus always the same, but the length of the operative part of this movement, i.e., that effected by the arc 11, depends on the pawls selected by the jacquard. The arc 11 also serves to lift a lever 22 connected to a bar 23 sliding vertically in a horizontal slide 26, which is connected to a lever similar to 22 operated by the other arc 11. The compound motion of the slide 23 is thus proportional to the length of stitch, and is used to operate the thread pull-off. The shuttles 41<a>, Fig. 6, to replace those in operation 41, are carried in a trough 49 arranged above the shuttles 41. When shuttles are to be changed, their threads are simultaneously cut by the relative movement of plates 48 having thread-holes with cutting-edges. The lower shuttle fingers 44 are then turned down so as to allow the shuttles 41 to drop, and the upper fingers 43 are raised clear of the shuttles 41<a>, and then brought down again, so as to push the new shuttles into place.