Patent GB-508714-A (GB)
Title: Improvements in automatic shuttle changing mechanism for weaving looms
IPC: D03D45/20
Filed: 1938-01-19
Abstract: 508,714. Looms with automatic weft replenishment. SOC. DES MOUVEMENTS AUTOMATIQUES PONCET. Jan. 19, 1938, No. 1823. Convention date, Jan. 20, 1937. [Class 142 (iii)] In a multi-shuttle loom with a weft feeler 11 coacting with the shuttle in the single box 8 at the magazine end of the loom, a selector 104 which records the condition of the exhausted (spent) shuttle in box 8 is oscillated by a separate gear in accordance with the weft pattern, but timed in advance of the multiple box controlling gear. If the weft feeler 11 on the cover 9 of the box 8 indicates that the shuttle in this box is substantially exhausted or spent, one or the other of several slides in the selector is struck by the armature 112 of an energized electromagnet in the feeler circuit, the slide actuated corresponding to the particular shuttle active at the time. The slides serve as indication storing devices, an actuated slide being moved to a position wherein a hole therein can register with a feeler finger 96 the unobstructed downward movement of which initiates the shuttlechanging movement as described below. The finger 96 is carried by a lever 93, which is raised by a cam 90 on a shaft 5 driven at half the speed of the crank-shaft, the timing being such that the selector is moved just after the feeler has felt a shuttle, say a "red " shuttle in the box 8, and the downward movement of the feeler occurs after this selector movement. If, as normally is the case, a different shuttle is next to become active, the selector moves the actuated slide clear of the descending feeler on its next movement, so that it encounters an unactuated slide and cannot descend. One pick before the spent shuttle again comes into action, the selector positions the actuated slide beneath the feeler which can then descend its lever 93 depressing a spring-controlled lever 77, which withdraws a locking-nose from a notched disk 70 on a normally stationary shaft 51 provided with cam for operating the shuttle changing devices and oscillates a lever 81, whereby a loose wheel 54 on the shaft 5 is caused to be driven and to drive the shaft 51 for one revolution. A selector 104, Fig. 19, with three slides T<1>, T<2>, T<3> and a multiple box B for three shuttles may be actuated by identical patterns M, M<1>, the pattern MI being one pick in advance of the pattern M, but in the arrangements described in detail only two shuttles " red " and " blue " are used, which come into action alternately for two picks, the selector being actuated by a cam 103, Fig. 1, on a shaft intermittently rotated from the shaft 5. Owing to the advanced timing, an ample period for the various shuttleoperations is available, as these commence before the spent shuttle becomes active. A cam 61 on the shaft 51 operates lever mechanism and a part 115 for restoring the operated slide to normal position shuttle changing. Whilst, say the " blue " shuttle is returning to the multiple box, a cam 62 acting on a lever 50 raises a rod 47 connected by a rod 114 to the selector 104, which at this period, owing to its advance timing is in.a position corresponding to the spent "red " shuttle next to become active. The rod 47 is accordingly positioned beneath the magazine 19 for " red " shuttles and pushes upwards a corresponding rod 30, while by lever mechanism described causes notched cylinders 21, 22, Fig. 6, to release the lowest " red shuttle. This drops on to fingers 37, 38, which are lowered therewith, as shown in Fig. 4. A cam 59 then operates lever mechanism, whereby a carrier 17 with a plate 18 and a dummy box is moved to the left, a notched part 41. removing the shuttle from the fingers 37, 38 so that it drops on to the plate 18. Cams 57, 58 operate lever mechanism, whereby the shuttle box 8 is raised and its cover 9 is raised to a greater extent, the fresh shuttle entering the raised box 8 whilst the dummy box moves into position to receive the spent "red" shuttle, a finger 45 on an L- shaped part pivoted to a horizontal wall 43 of the dummy box engaging a fixed cam groove. The cover 9 is then lowered and retains the fresh shuttle. The carrier then returns, takes away the spent shuttle and ejects this.