Patent GB-191002830-A (GB)
Title: Improvements in or relating to Embroidery Machines.
IPC: D05C9/06
Filed: 1910-02-04
Granted: 1910-08-11
Abstract: 2830. Vogtlandische Maschinenfabrik (vorm. J. C. & H. Dietrich), Akt.- Ges. Feb. 9, 1909, [Convention date]. Embroidery machines.-Relates to jacquard apparatus and transmission gear in which the movements are obtained from an oscillating- lever and the jacquard determines the point in the lever to which the transmission mechanism is coupled. Two equal sets of apparatus are used which control the horizontal and vertical movements of the fabric. Jacquard apparatus. The jacquard needles 5 are coupled to bars 7 having notches 10, 11 in their lower and upper edges. After each operative movement of the prism, the jaws 12, 13 approach one another. The bars that have been pushed inwards are then depressed by the jaw 13, and those that remain unmoved are lifted by the jaw 12. The bars 7 carry with them upright rods 8 and these are locked in position by a bar 16. The needles 5 are locked when positioned, by a bar 94 which engages with one or other of two notches 87, 88. They are returned to initial position afterwards by a bar 101. Measuring - apparatus. Each jacquard comprises eighteen measuring - needles. Nine of these have rods 8 extending downwards and provided with horizontal arms which engage severally with pitmans 21 of a measuring-apparatus. The other nine have rods 8 extending upwards and linked to horizontal rods 19 having vertical arms which engage severally with pitmans 21<1> of a second similar measuring-apparatus. Only one needle of each group is operative at one time. The pitmans 21, 21<1> (only four of each are shown) are pivoted to positively oscillated levers 25, 25<1>, and, when lifted, engage prismatic pins on slides 27, 27<1>. The slide 27 is connected through a link 37 and the short arm of a lever 33 to the rack 36 of the frame-driving gear. The slide 27<1> is slidingly connected to the long arm of the lever 33 which is pivoted to the rack. The arms of this lever are in the ratio 10:1. By this gear, one-tenth of the movement of the slide 27' is added to the whole movement of the slide 27, and the sum is transmitted to the rack. In a modified apparatus, one-tenth of the movement of the slide 27<1>, Fig. 4, is added to the whole movement of a slide 27 by means of a slotted-plate connexion 40. In another, the slide 27 is connected to the rack by a differentially-screwed coupling-sleeve, which is toothed externally and is rotated by rack teeth on the slide 27<1>. In a third, a differential toothed gear, Fig. 7, is used. One slide rotates a wheel 52 which transmits through a wheel 54, planet-pinions 55, 56, and a wheel 57 to a rack pinion 59. The other rotates a shell 64 carrying the planet-pinions. Directioning-mechanism. In the last modification, by having two pivoted racks for each slide which can be brought alternatively into engagement with opposite sides of their respective wheels, positive and negative movements can be obtained directly. In the construction shown in Fig. 1, the direction of movement is controlled by two similar arrangements D', D<2>. Each comprises a wheel 65, Fig. 9, loose on the shaft 67, operated by the driving-rack 36, a wheel 72, and rack pinion 79, and alternative gears for connecting the wheels 65, 72. The wheels 65, 72 gear with equal wheels 66, 71 on sleeves having second equal wheels 69, 70 respectively. For one direction, the wheels 69, 70 are connected by one long pinion engaging both. For the other direction, they are connected by a pair of interengaged pinions 77, 78. These three pinions are carried by a frame 73, Fig. 1, which is moved one way or the other by a positively-operated lever 86, according as to which arm of the lever is engaged with a doublejawed lever 81. To control this, the lever 81 is operated by an additional jacquard needle. Safety mechanism. A safety needle 5<1>, Fig. 12, is mounted in line with the others, but for this one no perforations in the jacquard cards are provided. One notch 88 is masked by a plate 90. If, when the machine is started, the jacquard cards are in place, the needle 5<1> is pushed inwards, the locking-bar 94 can enter the notch 87, and the safety gear is inoperative. If no card is present, the needle is not pushed forward, and the rod 94 is held out as shown. A rod 104 is connected with the starting-gear. When it is raised, since the lever 93 is prevented from moving by the plate 90, the lever 96, 97, to which the rod 104 is attached, is rotated in opposition to a powerful spring 98, and through a link 103 rotates the lever 101, thereby withdrawing all the jacquard needles into zeroposition.