Patent GB-190921244-A (GB)
Title: Improvements in Shuttle Changing Mechanism and Indicating Mechanism to be uses in Conjunction therewith.
Inventor: HOLLINGWORTH EDWARD
IPC: D03D43/00
Filed: 1909-09-17
Granted: 1910-09-15
Abstract: 21,244. Hollingworth, E., [Crompton & Knowles Loom Works]. Sept. 17. Shuttle - changing mechanism; change-box motions.-In drop-box looms having a Hollingworth and Knowles or like head motion and manual control of the shuttle-replenishing arrangements, two supplementary cells 21, 22, Figs. 1 and 16, are arranged at one end of the loom on a hand-lever 23 pivoted to the box-lifter rod 7<1>, the lever normally assuming an inclined position. When the weaver notices that a shuttle is becoming exhausted of weft, he places a spare shuttle carrying weft of a similar colour&c. in the insertion cell 21, and then moves the lever 23 to place the cells 21, 22 into vertical alinement with the drop-boxes 6<1>. He afterwards operates special indicating-mechanism, whereby, when the pattern indicates for the exhausted shuttle to be picked, movable runs 83, 86, Fig. 2, on the two vibrator levers 14, 14<1> that control the box-rod 7', Figs. 1 and 16, and boxes 6<1> are automatically operated to place the catch cell 22 into line with the race-way, to receive the exhausted shuttle. When next the pattern indicates for the exhausted shuttle to be picked, the movable runs are again operated, and the insertion cell 21 is placed in line with the race-way, so that the spare shuttle is picked therefrom. The lever 23 may be moved by hand, or by a projection 33<3> on a lever 33<1> linked to a treadle 31 to bring the cells 21, 22 into alinement with the boxes 6<1>, and it is locked .to the frame 5 of the shuttle-boxes by a spring locking-catch 25, but, after the cell 21 has been brought into action and when the boxrod 7<1> is raised to bring the drop-boxes 6<1> into action, an unlocking lever or arm 28 engages the latch 25 and automatically unlocks the lever 23, which then assumes its normal position. so that the exhausted shuttle may be removed from the cell 22. The indicating-mechanism comprises four levers 36 provided with spring locking-devices and each corresponding to a particular one of the four shuttles in use, and there are also special pattern indicators 20<1>, 20<a>, Fig. 2, arranged in the necessary positions on the pattern chain 20, each indicator corresponding to a certain one of the shuttles. The shuttle which is exhausted and has to be changed is assumed to correspond to the second lever 36, Fig. 1. This lever is connected by a tubular shaft 44 to an arm 45 fast to a tubular shaft 46, Figs. 1 and 9, provided with a lever 48, 48<1> linked to an upright notched latch 50 pivoted on a pattern-indicating lever 52. There are similar parts in connexion with the other levers 36. When the second lever 36 is operated, a particular latch 50 is thus moved beneath a bar 54, but no further action occurs until the pattern indicator 20<1>, Figs. 2 and 9, corresponding to the exhausted shuttle, comes beneath, and raises, the particular lever 52 referred to, whereupon the latch 50 thereon raises the bar 54 carried by arms 55 loose on a shaft 56. By means of lever mechanism 57, 59, 62, 63, a sliding rod 65 is then moved against spring action, and the yoke-shaped or forked end of an arm 64 moves a pin-wheel 66 into gear with a star-wheel 73. The pin-wheel is splined on the hub of a driven pinion 67, and has two pins, whereby the star-wheel 73 and a double cam 74, connected thereto and having two cam-grooves for actuating levers 75, 76, are first rotated through one-eighth of a revolution and then through another eighth of a revolution. The levers 75, 76 are connected by lever mechanism to levers 82, 85 having rounded extensions 82<2>, 85<2> engaging the sliding runs 83, 86 provided with slots fitting on headed studs on the vibrator levers 14, 14<1> that control the box-rod 7<1>, Fig. 1, and boxes 6'. The camgrooves are of such shape that, during the first eighth of a revolution of the cam 74, Fig. 2, the sliding run 86 is moved away from the pattern chain 20, thus lowering the vibrator lever 14<1>, the inclined or cam-shaped upper edge of the run 86 engaging a stud or pin 87 on the run 83, and thus raising this run and the vibrator lever 14. This disposition of the vibrator levers 14, 14<1> causes the catch cell to be placed in position to receive the exhausted shuttle. The second eighth of a revolution given to the cam 74 causes the runs to be moved back again to normal position. When the pattern again indicates for the exhausted shuttle to be picked, the cam 74 is again rotated, both runs 83, 86 being first moved away from the pattern chain 20, and both vibrator levers 14, 14<1> being lowered, whereby the insertion cell is brought into line with the race-way. Subsequently the runs are moved back to normal position and, moreover, a latch or pawl 93, Figs. 1 and 9, engages the lever 48, 48' and rotates the shaft 46, thus returning the latch 50 and the hand-lever 36 to normal position. Instead of a hand-lever 36, a slide or rotatable handle or wheel may be used. Instead of two boxes 6', only one may be used. In one modification, four shuttle boxes 6<1>, 6<2>, Fig. 18, are used, the boxes 6<2> being moved upwards away from the boxes 6<1> to receive the supplementary cells 21, 22, and the boxes 6', 6<2> being normally locked together by spring-actuated latches 108. A connector leading to the indicating-mechanism moves a mutilated pinion 97 into gear with a master gear 96, a pin 103<1> on a crank-arm 103 then operating a lever 104, 104<2> and a verticallymoving rod 106 carrying a forked frame 107, which engages and releases the latches 108 and then moves the cells 6<2> upwards. A stud 109 on the rod 106 engages a cam-shaped arm or plate 110, and moves the lever 23 to place the cells 21, 22 between the boxes 6', 6<2>; or the lever 23 may be moved by the treadle or by its handle.