Patent GB-191115037-A (GB)
Title: A Mechanism for Automatically Driving One or More Embroidery Looms and their Frames by Means of a Jacquard Mechanism.
Inventor: GEORGES CHARLES
IPC: D05C13/00
Filed: 1911-06-27
Granted: 1912-01-11
Abstract: 15,037. Georges, C. Aug. 6, 1910, [Convention datel. Embroidery machines. -In an automatic embroidery - machine, the movements determined by the jacquard apparatus are compounded and transmitted to the work frame by two pairs of inclined guides 24 receiving motion from slide blocks 22 carried respectively by the two horizontal bars 20 actuated directly from the jacquard. The guides 24 are hinged together and to adjustable brackets 26, and their relative inclination can be varied by means of a differentially screwed rod 30. The slideblocks 22 carry rollers 23 which bear upon the guide 24. The slideblocks are adjusted to the width of the bars by rotating them upon their pivoted connexion with the bar 20 by means of screw-rods 32. The bars 20 are mounted between rollers 35, 36 on brackets 39, which can be similarly rotated to adjust them to the width of the bars. The brackets 39 are carried by eccentric pins 38, and the height of the bars 20 can be varied by rotating the disks 48 which carry the pins 38. Opposite ends of the work frame are slidingly mounted on pillars 51 secured to the girders 27, and intermediate points carry girder rods 54 which slide in sleeves 53 on the girders. The frame can be moved on the pillars 51 by a hand rack-and-pinion gear 50, 60, and is secured in position by spring pressed pins which enter holes 65 in the flat face of the rack plate. The jacquard mechanisms are of the type in which a slide having a reciprocating movement of invariable amplitude imparts a movement to a second slide, the amplitude of which is determined by the total thickness of the selected droppers interposed between the slides. Two jacquards operating alternatively, operate each rod 20, the direction of the movements of the frame being determined by the relative values of succeeding selections of droppers. The mechanisms are operated by cams on a central shaft 77 geared direct to a sleeve 73 integral with a driving-pulley 71. The card cylinder 88, Fig. 9, is rotated step by step by a worm and a train of gear-wheels operated by a toothed segment on the shaft 77. The movements imparted by the segment are corrected by means of a spring-urged lever which engages successively with the flat sides of a square cam fixed on one of the spindles of the gear train. The movement of the card cylinder is further controlled, and the cylinder locked in successive positions by rollers upon a pair of spring-pressed levers which alternatively snap into circular recesses in a dividing wheel. The card-strip 110 passes over the cylinder 88 and round spring- pressed rollers 114, 120. Two plates 111, are separated to permit the disengaged portion to pass between them, but retain pins 112 which are secured at intervals to the strip and so cause the strip to hang in loops as shown. The needles 136, 137 are moved up to the card by cam-actuated carriers 132, and pass through slots in the droppers. The selected needles are moved so that gaps 158, 159 in them are in alinement with the droppers. Then, as the supporting-reed 152 is moved downwards, the droppers corresponding to the selected needles are able to move down with it and the heads 160 are interposed between the surface 161 of the driving-slide 162 and the abutments 169 on the rods 20. When the value of a selection of droppers is less than the previous one of the alternate jacquard, a reverse movement of the rod 20 to bring the abutment up to the droppers is produced by a spring actuated plunger 176. The stop gear and embroidery mechanism are controlled by droppers 186, Fig. 7, which are slidingly mounted in and constantly reciprocated by the driving slide 162. Each carries a pin which, when the dropper falls, engages in a notch in a corresponding bar 187 and causes the bar to move with the slides to the left. When the bar a moves, it carries with it the tail of a lever 193, which is linked to a belt fork controlling the belt 70. The belt is thereby moved on to the loose pulley 72, and the machine is stopped. The return of the stop gear is prevented by the head of a lever 210 which is pulled by a spring 212 into a position to oppose the return of a lever 207. To re-start the machine, the lever 210 must be pulled over by hand. A rod 214 pivoted to an arm 213 of the lever 210 is coupled to a lever 224 of a brakegear. When the rod a is actuated the head of the lever 224 is forced between the free ends of two segmental brake-blocks hinged together and disposed within the pulley 71 which forms a brake drum. Three rods b, c, Fig. 11, and one of the series d, Fig. 12, are actuated to bring the perforators into operation. A rod b first rotates a lever 226, 227, 228 and through rods 232, 234, Fig. 7, moves a clutch sleeve 79 out of engagement with the face of the wheel 75 and into engagement with a fixed stop, thereby positively stopping the shaft 74 which drives the stitching parts. The parts 226, in rising, releases a lever 231, which is linked through parts 252, 253 to a lever 239 and leaves this lever free to be oscillated by a cam-actuated lever 259, Fig. 7. The motion of this lever is communicated to the perforators 250, Fig. 13, through a slotted lever 243 and block 246. The size of a perforation is varied by moving the block 246 in the lever 243. To this end, the block is linked to a lever 266, Fig. 12, which receives a movement varying according to the rod d selected to actuate it. The lever 266 is held from returning by a pawl 270, which rises into engagement with a toothed arm 269. When the perforating is completed, a rod e is moved to withdraw the pawl 270, and a rod c is moved to remove the lever 231 from its locking position and permit the lever 239 to return to its normal position.