Patent GB-478429-A (GB)
Title: Improvements in and relating to looms of the multiple shuttle moving box type
IPC: D03D43/00
Filed: 1936-06-16
Abstract: 478,429. Looms with automatic weftreplenishment. SOCHOR, Z., and LASZLO, A. June 16, 1936, No. 16779. [Class 142 (iii)] In a loom with drop boxes at one or both sides and in which the inoperative shuttle is out of the weaving position for at least two beats-up in sequence, a spent or substantiallyexhausted shuttle is automatically replaced by a corresponding fresh shuttle in the time during which the respective shuttle box in the normal process of weaving arrives and stays above the level of the lay. The front wall of the box is caused to move from a normally closed to an open position to permit of the ejection of the spent shuttle and the insertion of a fresh shuttle. Thus, in a loom with two shuttle boxes at one side and a single box at the other, the ejection of the shuttle from the lower box and the insertion of a fresh shuttle from a magazine occurs whilst the lower box 8 is below the lay level, as shown in Figs. 6 and 7, wherein 12 shows the picking spindles. Automatic shuttle changing in the case of the other shuttle occurs when the upper shuttle box 7 is above the lay level, a vertical magazine 10, Fig. 10, being used in this case, whilst a horizontal magazine 11 is used in the former, the respective fresh shuttle feeders or plungers 42 being suitably positioned as shown in Figs. 10 and 12. Opening the shuttle box and ejecting the shuttle. The shuttle box tops and bottoms 67, 66, Fig. 22, are connected to a frame 55, which is raised and lowered by lever mechanism, and the front walls 65 are carried by shafts 63 on the frame. Arrangements for adjusting the height of the drop box are described. When the weft feeler mechanism indicates substantial weft exhaustion &c., rods 104, 105, Fig. 28, with cam-shaped ends engage corresponding parts 107 on angle levers, which are thereby rocked so that the parts 99, 100 assume horizontal positions. When the drop boxes fall, a roller 98 on an arm 97, on the lever shaft 63 strikes the part 100 and the shaft 63 is rocked. Similarly, the upper shaft 63 is rocked if the drop boxes rise. The corresponding front 65, say of the lower box, is lowered and the usual spring-controlled swell 53 ejects the spent shuttle. A slide 68 having a pin 70 extending into a recess in the swell is freed for outward movement by the lowering of the front whereby additional inward movement of the swell necessary to eject the shuttle is allowed. Various arrangements are described for giving an additional pressure to the swell so that it may eject the shuttle, thus it may be struck by a lever 146, Fig. 11. Adjusting screws on levers on the shafts 63 co-operate with surfaces on the lay, whereby swinging open of the front walls of the boxes is prevented when the corresponding box is in weaving position. Plates on the back of the swells co-operate with the roll of the knocking-off finger. Feeding a fresh shuttle from the appropriate magazine 10, or 11, Fig. 12. A part controlled by the feeler mechanism causes a lever 85, Fig. 11, keyed to but slidable vertically on a bolt 81, to be actuated as the lay moves forward. A telescopic selecting lever 82 is thereby moved into an operative position and is temporarily locked therein by means described. It is compelled by a forked anglepiece 92 to follow the drop box movements and at the beat-up engages a rod 170 on a particular ejector lever 47. This is rocked and the corresponding ejector plunger 42 is operated to transfer a fresh shuttle into the raised upper or lowered shuttle box. The lowest shuttle in each magazine rests on slides 43, Fig. 12, movable in the plungers 42. The shuttles are dropped one at a time, by means described, from the horizontal magazine on to associated slides, whence the shuttle is transferred into the shuttle box. The ejected shuttles drop on to an inclined trough 13, which may be upholstered, into a box 25 having inclined surfaces 258 and an opening 249. , Modifications are described wherein operation of the weft feeler mechanism first charges a spring, which is subsequently released.