Patent GB-421700-A (GB)
Title: Automatic device for frame embroidery machines
IPC: D05C9/06
Filed: 1934-02-12
Abstract: 421,700. Embroidery machines. WURKER GES., 16, Pirnaische Strasse, Dresden, Germany. Feb. 12, 1934, Nos. 4619, 4620, and 4621. Convention dates, Feb. 11, 1933, March 24, 1933, and Sept. 26, 1933. [Class 112] In an automatic machine for frame embroidery, a carriage or slide to which the work is secured is moved in a closed path by the automatic drive and, in one direction of its movement, moves a driving member released by the means for displacing the frame, and in its return movement returns to initial position, effecting displacement of the frame. In the embodiment illustrated, Figs. 2 and 3, the bed plate 2 is below separate needleheads 3 connected by a transverse support 4 connected to three arms 5. The separate parts of the material to be embroidered are stretched in frames 8, Fig. 2, which are secured to a common frame 9 worked by the automatic means forming the invention. The arrangement is as follows. As soon as the card cylinder 25 is moved by the lever 78 into the position shown in Fig. 6a, the lever 87 is given a partial rotation by the cam 89 and the rod 85 connected with the lever 87 is pushed upwards, the toothed sector 83 being given a corresponding movement. This rotates the card cylinder 25 to bring the next row of holes in the Jacquard card in front of the pins 32, 32<1>. The lever 78 is then swung by its cam groove 82 to move the card cylinder into the position shown in dotted lines in Fig. 6. The pinion accordingly moves out of engagement with the toothed sector 83 so that the return of the parts 83, 85, 87 to their initial position has no effect on the card cylinder. The spindle 29 of the card cylinder is connected to the spindle of the Jacquard card winding reel. According to whether the pins 32, 32<1> enter a hole or meet the solid card, they remain in initial position or are displaced. When the card cylinder has reached its left-hand position, the lever 41 with a roller 44 tracking the cam groove 45, moves in the direction of the arrow, Fig. 6a. The pivots 39 of the T-shaped levers 37, 37<1>, 38, 381 and the slides 34, 34<3> are moved upwards for contacting the plates. By the movement of the lever 37, the link 51 and connecting rod 52 are moved to the left to move the switch tongue 55 into the position shown in dotted lines in Fig. 6. The slot 54<2> is thus free to the pin 56. On the succeeding upward movement of the carriages 53, 53<1>, effected by the rods 93, 94, 97, 98, 99, 100 the pin 56 is guided in the slot 54<2>. While the carriages 53, 53<1> move upwards, the lever 64 is so turned that the pair of rack bars 61, are out of engagement with their pinions 68. After the rack bars are moved into engaging position shown in Fig. 6 by the lever 64, the carriages 53, 53<1> are again moved downwards to their initial position. By the use of the carriage 53 it is possible to effect adjustment of the intermediate members while free from load, the loading of these members taking place only when the work required to displacing the embroidery frame is effected by the carriage or the rods 93-100 connected therewith. As each of the double armed levers 57, has lever-arms of unequal length, and as each of the pivots 56, 56<1> co-operates with three switch slots 54, 54<2>, there is obtained, Fig. 22, for the pivots 39 a zero position and four positions to the left and to the right of the zero position. As a consequence, the two slides 59 each operating one of the rack bars 10, 11, assume eight different positions in addition to the zero position. On the return movement of the card, cylinder 25 to the right, the plates 33, 33<1> are returned, if displaced, by the lever 111. The rack bar 11 effects the displacement of the frame 9 in the longitudinal direction and engages a rail 13 of U-shape secured below the frame 9. If the bar 11 is displaced, the frame is moved. The rack bar 10 imparts the transverse movement of the frame by the aid of a bell-crank lever 17. The movement of the rods 51, 51<1>, 52, 52<1> actuate the rack bars 10, 11, via the racks 61, gears 68 and pinions 70 which in turn give the frame 9 its resultant movement.