US2403497A - Automatic stopping of looms - Google Patents

Description

Filed May 1, 1945 z 0 July 9, 1946.

. M 6 mm a m m A yZczZ ywww ,4 f 7M a F d 1 I I I n i I I I i I l I l t I i I I l 1 l I u I I 1 I I I 0 LOU- Patented July 9, 1946 AUTOMATIC STOPPING OF LOOMS Richard Edwin Bridge, South Harrow, England Application May 1, 1945, Serial No. 591,345 In Great Britain March 20, 1945 4 Claims. 1

This invention relates to means for the automatic stopping of a loom comprising a shuttle provided with a hook-like member which, when owing to some fault the shed is not formed, is projected automatically into the path of the ballooning weft thread, so as to cause the latter to break and bring about automatic stoppage of the loom in a known manner. The hook-like member of such means may be controlled by a pair of pivotally mounted tripping pieces, having oppositely inclined faces, and engaging one another on a plane between their pivotal axes, one of said tripping pieces being spring influenced and having in one therewith a spring influenced latch piece which, normally, extends across the path of the lever by which the hooklike member is carried, said hook-like member being itself influenced by a spring tending to project it into the path of the ballooning weft thread, the arrangement being such that, when ,a perfect shed is not formed, the path of the inclined face of the one or the other of the tripping pieces is intersected by the warp or twist threads, whereupon both tripping pieces are turned about their pivot (owing to their engagement with one another), the latch piece is caused to turn about the pivotal axis of the tripping piece to which it appertains and is displaced laterally with respect to the lever by which the hook-like member is carried thus releasing said lever to the action of its spring to project the hook-like member into the path of the ballooning weft thread.

One form of the invention is shown by accompanying drawing, in which Figure 1 is a plan of a shuttle; Figure 2 is an enlarged fragmentary sectional elevation substantially on the line 2-2, Figure 3, and Figure 3 is an enlarged fragmentary sectional elevation substantially on the line 3-3, Figure 2, the parts being shown in their set or normal positions; Figures 4 and 5 are sectional elevations corresponding with Figures 2 and 3, respectively, but show the parts in their operative or abnormal positions; Figures 6 and 7 are sectional plans on the lines 8-6, Figure 3, and 1-1, Figure 2, respectively.

The improved device involves only the drilling of a hole in the back side of a shuttle S, and it comprises a tube a in which is fitted a body b slotted to receive the movable parts as set forth hereinafter. The body b is formed at its lower end with a diametrai tongue which is received in a corresponding slot in the plugged lower end d of the tube a, the parts being retained in position by a cross pin e. The body I) is slotted diametrally at f, Figures 3 and 7, to accommodate a lever g pivoted on a pin h, the lever a being formed with a double-hook-like part i and being influenced by a spring k tending to urge the double-hook-like part 7' through a slot m, Figures 2 and 7, in the tube a, while at its upper part the lever g is formed with a head 1.

At its upper end the body b is slotted diametrally at 0, Figures 1, 2 and 6, at right angles to the general plane of the slot f and in this slot 0 are pivoted on pins 11 17 two overlapping tripping ieces q r, from one (I, of which a pin 8 projects into a slotted eye t formed in the other r.

Integral with the tripping piece q is an arm or latch piece u, urged by a spring 0 so that, normally, it intersects the path of the head 11 of the lever g and thereby holds said lever in its set position, as shown especially in Figures 2 and 3. w is a sleeve on a cross pin a serving as a stop for limiting the outward movement of the lever 9 and its double-hook-like part 1.

Each of the tripping pieces 9 1 is formed with an inclined face y projecting slightly from the top end of the tube a which is bevelled as at z, Figures 2 and 4, to conform with the shape of the adjacent part of the shuttle 8.

During normal weaving the upper shed of the warp is raised to the position indicated by the line H, Figure 2, in relation to the shuttle S, while under the effect of centrifugal force, the weft balloons in said shuttle as indicated by the circular series of dots l2 which represent a transverse action of the weft in successive positions. If, during weaving, the twist floats, i. e. a shed is not formed perfectly, even by the breaking of a single warp thread, a bunch of warp threads is pulled down to the position ll Figure 4, and engages the one or the other of the inclined faces 31, causing both of the tripping pieces q r and the latch piece it to be moved to the position shown in Figures 4 and 5. This movement of the latch piece u releases the lever g to the action of its spring k and the doublehook-like part 7 is projected through the slot m into the path of the ballooning weft thread (as indicated in Figure 5) which is thus broken and brings about the stopping of the loom in a known manner.

After the necessary repair has been effected, the parts may be re-set by pressing back the double-hook-like part 7' through the slot m, whereupon the spring 1; moves back the latch piece u into the path of said part to retain it in its set position.

The use of the safety device of this invention 3 involves only the drilling of a hole in the back side of a shuttle and it follows that it may be incorporated readily into existing shuttles as well as during the manufacture of new shuttles.

I claim:

1. For fitting into a bore in the side of a shuttle for the purpose of effecting the automatic stopping of a loom, a tubular casing, a hook-like member pivotally mounted in said casing, a spring tending to urge said hook-like member to project through a slot in said casing, a spring influenced latch piece, normally extending across said hook-like member and holding it against the action of its spring, a pair of interconnected tripping pieces pivotally mounted in said casing and projecting beyond one end thereof, said latch piece being connected with one of said tripping pieces and being movable therewith when said tripping piece is moved about its pivot.

2. For fitting into a bore in the side of a shuttle for the purpose of efiecting the automatic stopping of a loom, a tubular casing, a hook-like member pivotally mounted in said casing, a spring tending to urge said hook-like member to project through a slot in said casing, a spring influenced latch piece, normally extending across said hook-like member and holding it against the action of its spring, a pair of interconnecting tripping pieces pivotally mounted in said casing and projecting beyond one end thereof, said latch piece being connected with one of said 3. Means for the automatic stopping of a loom comprising a shuttle provided with a hook-like member which, when owing to some fault the shed is not formed, is projected automatically into the path of the ballooning weft thread, so as to cause the latter to break and bring about automatic stoppage of the loom in a known manner, a spring influenced latch piece, a pair of pivotally mounted tripping pieces, said latch piece being in one with one of said tripping pieces and said tripping pieces having oppositely inclined faces and engaging one another on a plane between their pivotal axes, the hook-like member being spring influenced and, normally, held in an inoperative position by the spring influenced latch piece which is in one with one of the pair of pivotally mounted tripping pieces, the arrangement being such that, when a perfect shed is not formed, the path of the inclined face of the one or the other of the tripping pieces is intersected by the warp or twist threads, whereupon both tripping pieces are turned about their pivots, the latch piece is caused to turn about its pivotal axis with respect to the hook-like member, thus releasing said member to the action of its spring and projecting its hook-like end into the path of the ballooning weft thread.

4. For fitting into a bore in the side of a shuttle for the purpose of effecting the automatic stopping of a loom, a tubular casing in which are pivotally mounted a spring influenced hook-like member, a pair of interconnected tripping pieces and a spring influenced latch piece, the hook-like member being normally held in a set position by the spring influenced latch piece, which is movable with one of said tripping pieces.

RICHARD EDWIN BRIDGE.

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