Patent GB-485884-A (GB)
Title: Improvements in and relating to multi-shuttle looms
IPC: D03D45/20
Filed: 1937-01-12
Abstract: 485,884. Automatic shuttlechanging mechanism. TRIGGS, W. W. (Crompton & Knowles Loom Works) Jan. 12, 1937, No. 909. [Class 142 (iii)] The loom has shifting drop boxes on one side and at the other side has a multi-compartment shuttle magazine and boxes 230, 231 (having a single stationary shuttle binder 232, Fig. 7) normally in the lowered position shown in Fig. 1, so that the active shuttle enters the upper box 230. At the beat up, a weft feeler or detector 90 enters the upper box 230, and if the shuttle therein is substantially exhausted, an electromagnet 96 is energized, an armature 98 and trip 99 are raised and one of several indication-storing elements 109-112 is rocked to the position shown in dotted lines in Fig. 4, and is held in this set position by a spring plunger. The elements 109-112 are mounted on a rod on a sliding yoke 102, which is moved on rods 100, 101 as described below to a position dependent on which of the shuttle boxes will be in active position on the next beat-up after weft detection. Eventually, when the spent shuttle again becomes active, the shuttle boxes are raised, so that the spent shuttle is received in the lower box 231, a shuttle is released from one of the magazine compartments under control of a colour slide 177 and it is transferred by a head 217 on arms 214 into the raised box 230, the cover 236 of which has been raised by means which are described below. The boxes 230, 231 then drop and the spent shuttle falls out of the box 231. Positioning the storing elements. The yoke 102 is connected by lever mechanism 103, 104 to a rod 81 and spring-controlled lever mechanism 66, 65, which is connected by parts 64, 60, Figs. 6 and 12, to a lever 50 operated by floating lever mechanism from two levers 47, 48. These are rocked by vibrator gears controlled by pattern chain rolls &c. similar to but set one pick ahead of the drop box pattern rolls &c. The teeth on the vibrator segments are so arranged, however, that they operate the vibrator gears controlling the yoke 102 later than the drop-box vibrator gears and consequently the yoke 102 is moved whilst the shuttle is still at the magazine side, but after weft indication has occurred, thereby allowing an increased time for the shuttle changing operations. Positioning the colour slide 177. This is moved axially by connections 186, 185 to the lever mechanism 64-66. Releasing a fresh shuttle from the magazine. When a depleted shuttle becomes active, a stop shoulder 124 on the set indicator element is positioned by the movement of the yoke 102 into the path of a stud 125 on a lever 126 pivoted on a lever 137, which is normally rocked by a cam 134 on the bottom shaft. Interruption of the normal movement of this lever causes it to come under the action of a second cam 132, whereby its left end is raised abnormally and rocks an arm 145. A rod 147 on the arm 145 operates lever mechanism 182, 181, Fig. 6, whereby fingers 179 engaging an elongated rib 178 on the colour slide are operated to rock this, and one of two fingers 176 thereon engages and rocks one of several trip fingers 175 on the slide, whereby a shuttle is released from that magazine compartment A-D corresponding to the active shuttle, a supporting pad 174 being moved into position to prevent descent of the superposed shuttles. The released shuttle falls on to supports 220 extending recurrently from the lay and having forward extensions or an overhang 235. Transferring the fresh shuttle onto the raised box 230. A pin 221, Fig. 7, on a slotted rod 152, Figs. 1 and 7, on the abnormally moved lever 137 lifts a slotted arm 204 on a lever 200 constantly rocked by a cam 234 into position to operate a pin 210 on an arm 208. This is connected by spring devices to the shuttle transferring arms 214, the spring devices yielding if an improperly positioned shuttle is encountered. A guide rod 218 extending through a guide eye 219 is carried by the head 217. The " set " indicator by means of its finger 113, Fig. 4, moves a dog 114, Figs. 1 and 4, on a camrocked lever 240 into position to engage a lever 94, which thereupon raises a box lifter rod 242 and the shuttle boxes 230, 231. When the dog moves back, a lug 183 on the upper box cover 236 engages a fixed cam 184 on the magazine, whereby the cover is raised so that the box 230 may receive the fresh shuttle. When the boxes descend, an abutment 193 thereon strikes a detector withdrawing arm 194 pivoted to a spring-controlled lever 86 carrying the detector 90, which is thus withdrawn. The spent shuttle is ejected under the stationary shuttle binder 232. The cover 236 has a notched downwardly-extending rib 234 to engage a shuttle being inserted into the box. The rib and cover are notched to clear the overhang 235. The feeler may comprise two wires 91, 92, which are electrically connected by a metallic ferrule on the bobbin on the shuttle, when this is substantially exhausted.. The lever 86 is pivoted at 87 on an arm extending from the magazine.