US2707498A - Loom shuttle box with stop motion control - Google Patents

Description

May 3, 1955 F. s. EVES LOO" SHUTTLE BOX WITH STOP MOTION CONTROL Filed June 13, 1951 2 Sheets-Shet 1 rederik 591d 65 ves q Inventor y 3, 1955 F. s. EVES 2,707,498

LOOM SHUTTLE BOX WITH STOP MOTION CONTROL Filed June 13, 195; 2 Shets-Sheet 2 APE-j Am.

Fvedarci y fl Evgs v Inventor Aftorney United States Patent LOOM SHUTTLE BOX WITH STOP MOTION CONTROL Frederick S. Eves, Bangor, Northern Ireland, assignor to Munster Simms & Company Limited, Belfast, Northern Ireland Application June 13, 1951, Serial No. 231,292

Claims priority, application Great Britain June 19, 1950 Claims. (Cl. 139-341) This invention relates to shuttle boxes for looms for weaving having stop motions and relates more especially to multiple or change boxes. More especially the invention relates to looms having hydraulically actuated change box mechanism as set forth in our prior U. S. A. Patent Number 2,615,475.

In stop motions actuated by swells in the shuttle box the motion may be actuated although the shuttle does not fully enter the box and if the change box mechanism is actuated with the shuttle sticking out damage will be done. This is especially so with the shuttle boxes in the arrangements of said prior patent because the shuttle boxes are relatively short.

An object of the invention is to obviate or mitigate this disadvantage.

An embodiment of the invention will now be described, but merely by way of example, with reference to the accompanying drawing in which Fig. 1 is a plan view of a two-shuttle box, with part of the top of the box broken away, Fig. 2 is a side elevation corresponding to Fig. 1, and Fig. 3 is a detached plan view of the auxiliary swell and associated parts.

Referring to the drawings:

The boxes 1 are substantially the same length as the shuttle 2, that is, the latter takes up substantially the whole length of the box. In each box there is a main swell 3 which takes up the major partof the length of the box, the swell having a pivot 4 at its outer end and subject to the action of an adjustable compression spring 5 at its other or free end 6. The end 6 is pivotally connected to a rod 7 on the upper part of which is screwed a headed collar 8 slidable in a bracket 9. Between the bracket 9 and a further collar 10 screwed on the lower end of the rod 7 is the compression spring 5. Adjustment of the headed collar 8 alters the position of the swell while adjustment of the lower collar adjusts the spring compression. The active face 3A of the swell is curved and at the pivot end a rounded projection 11 is provided for a purpose to be described. Beyond the end of the main swell and at the opposite side of the box there is provided in the outer end of the box an auxiliary pivoted swell or feeler 12 having a suitably rounded face 12A which projects inwardly of side 13 of the box for engagement by the shoulder of the shuttle when it has fully entered the box. The spindle 14 to which the auxiliary swell or feeler is keyed passes up through the top 15 of the box and has an arm 16 fixed thereon the spindle 14, the swell 12 and the arm 16 together forming a bell crank arrangement. Arm 16 is pivoted to a slide 17 extending the length of the box and carrying a longitudinally adjustable stud 18 which is adapted to co-operate with a roller 19 on the end of a lever 20 having a pivot 21, and an arm 22. Ann 22 actuates the check valve 23, the action being opposed by a relatively weak spring 24. The roller 19 is engaged by either of the two studs 18 depending upon which shuttle box is in working position. In normal operation of the loom, if the shuttle enters a box 1 properly, the

corresponding bell crank and slide actuate lever 20 and arm 22 to allow the valve 23 to close and thereby complete the hydraulic system to the stop mechanism which is acted upon by pulses from the loom drive to prevent stoppage of the loom. If, however, a shuttle does not enter the box properly, the auxiliary swell 12 is not moved and the valve remains open and the pressure pulses by-pass the stop mechanism which then brings the lay of the loom to rest.

The hydraulic system, stop motion and check valve and the manner in which they operate are fully described and illustrated in the specification and drawings of our said prior U. S. A. Patent Number 2,615,475, and need not be further described as they form no part of the present invention. For the sake of clarity, however, it is pointed out that the control lever 20 indicated in the drawings of the present application corresponds to the control lever 88 indicated in the drawings of our said prior patent.

The aforementioned rounded projection 11 at the end of the main swell 3 acts as a reaction or support which by engaging one side of the shuttle causes the front of the other side to press against and actuate the auxiliary swell 12 and thus close the check valve 23 of the hydraulic stop motion system.

A rubber covered roller may be provided on face 12A of the auxiliary swell 12.

Various modifications may be made from the scope of the invention which enables a relatively small multiple shuttle box, that is, one which is just long enough to house the shuttle but which eliminates the danger of the stop motion being allowed to let the loom run when a shuttle is not fully home in the box.

What I claim is:

1. For use in a loom having a stop motion operated by a hydraulic system including a lever-operated control valve; a shuttle box, and especially a multiple or change shuttle box, which is of substantially the same length as the shuttle, said shuttle box having a main swell for arresting the shuttle, a movable auxiliary swell located beyond the main swell in the direction of travel of the shuttle when entering the box and actuable by the shuttle when the shuttle fully enters the box, and a lever system connected to said auxiliary swell and operable on actuation of the latter to effect movement of the lever of the said control valve.

2. For use in a loom having a stop motion operated by a hydraulic system controlled by a lever-operated valve, a shuttle box, and especially a multiple or change shuttle box of substantially shuttle length, having a main shuttle-arresting swell, a movable auxiliary swell actuable by a shuttle fully entering the box, and a mechanical connection adapted to extend between said auxiliary swell and the lever of said control valve, and operable upon actuation of the auxiliary swell to effect movement of the lever of said control valve.

3. For use in a loom having a stop motion operated by a hydraulic system which is controlled by a leveroperated valve; a shuttle box, and especially a multiple or change shuttle box of substantially shuttle length, a main shuttle-arresting swell and a movable auxiliary swell in said shuttle box, said auxiliary swell being located beyond the main swell in the direction of travel of the shuttle when entering the box and being actuable by the shuttle when the latter fully enters the box, and a mechanical connection from said auxiliary swell for engaging the lever of said valve and efiecting movement of same upon actuation of said auxiliary swell, said mechanical connection comprising a bell crank lever of which the auxiliary swell forms one arm and a slide member pivotally connected at one end to the other arm of the bell crank lever and adapted to engage the valve lever at its free end.

4. A shuttle box as claimed in claim 3, in which said slide member has at its free end an adjustable stud so that the slide member is length-adjustable.

5. A shuttle box as claimed in claim 4, in which the main swell is formed at its inner end With a projection to urge the shuttle against the auxiliary sWell.

References Cited in the file of this patent UNITED STATES PATENTS 1,029,961 Wyman June 18, 1912 Newton-Smith Sept. 9, 1919 Turner Dec. 23, 1941 Dufourd et al Jan. 13, 1953 FOREIGN PATENTS Germany June 9, 1898 Germany June 16, 1932 Germany Dec. 14, 1938 France Nov. 21, 1932 Great Britain Apr. 20, 1938

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