US2587409A - Retainer for drop wires - Google Patents

Description

Feb. 26, 1952 w. N. TUCK 2,587,409

RETAINER FOR DROP WIRES Filed Feb. 14, 1950 2 SHEETSSl-IEET 1 Feb. 26, 1952 w. N. TUCK RETAINER FOR DROP WIRES 2 SHEETSSHEET 2 Filed Feb. 14, 1950 Patented Feb. 26, 1 952 UNITED STATES PATENT- OFFICE 2,587,409 aE'rAiNEa FoRpRoP WIRES Walter Nl Tuck, stun; Boston, v Application February 14, 1950, Serial No. 144,067

' 4 Claims o1. ise tjs.)

' The following specification set out in detail improvements in a retainer for drop wires suitable for use in a loom.

When the warp-stop motion of the loom acts to arrest the weaving operation'as the result of one or more warp threads breaking, the weaver must hunt for thedrop wire actuated by the broken warp thread and mend the latter. In the course of this operation, the drop wires on each side of the one which Was released, are moved apart in order to afiord sufficient space in Which to mend the broken thread. This displacement of the drop wires may'extend over considerable distance. Such disturbance of the wires and threads gives rise to irregularities in the subsequent weaving.

After the warp thread has beenre stored to normal unbroken condition, the weaver is apt to ignore replacement of the drop wires in their norm-ally spaced arrangement. This results not only in imperfection in the goods woven, but abnormal operation of the loom and excessive wear on the parts.

It is an object of my invention to provide an improved retainer which limits the extent to which any group of drop wires may be moved in the operation of mending a broken warp thread.

It is also an object of my invention to maintain the drop wires in proper vertical position and overcome any tendency toward rocking during the weaving operation.

A still further object of my invention is to provide mechanical agencies through which the drop wires are restored to and maintained in proper spaced arrangement by separate groups.

Other objects of my invention will be evident from the following description of the preferred form as illustrated in the accompanying drawings in which:

Fig. l is a side elevation partly in vertical section, showing a portion of a loom equipped with the improved retainer for the drop wires;

Fig. 2 is a plan view with parts broken away on the line 2-2 of Fig. 1;

Fig. 3 is a vertical cross-section on the line 3-3 of Fig. 1 showing the normal position of the retained drop wire assemblage;

Fig. 4 is a perspective view of the retainer and Fig. 5 is a vertical section on the line 55 of Fig. 4 showing one of the blades in the retainer.

Briefly described, my invention consists in suspending a rigid retainer in the form of a substantially planar grid or grating beneath the crossrods and in the area occupied by the drop wires. This retainer separates the drop wires into groups through the slot ll of the drop wire.

' slot ll.

7 2 of a limited number each. It also prevents accidental or intentional extensive displacement of the drop wires out of the normalspaced arrangement.

Ihave shown the improved retainer as forming part of and cooperating with the usual loom. As part of the loom, I have shown on the drawings the cross rods 6. These cross rods support side panels I. The upper parts of the side panels 1 areconnected by meansof a series of contact bars 8.

Below the contact bars and in the plane of the cross rods 6, there is provided a-series of separator bars 9. These bars are obliquely spaced from the contact bars as shown in Fig. 3.

A series of drop wires [0 is provided and each is carried loosely on a contact bar 8 which passes The warp threads l2 pass lengthwise over the cross rods 6 and separator bars 9. Each warp thread I2 passes through a hole 13 spaced below the slot I I in a drop wire It. The warp thread I2 as usual, supports the drop wire so that contact bar 8 is maintained in a mid-position lengthwise of the It is of course understood that when one "of the warp threads I2 is broken, the corresponding drop wire falls to the extent permitted by the contact bar 8, and the magnetic circuit for stopping the warp motion is actuated through means notillustrated.

The retainer proper is suspended from the cross rods 6 by a number of collars [4. Each collar has a depending threaded link l5. Set-screws It serve to attach the collars It rigidly to the cross rods 6.

The retainer is in the form of a rectangular frame l1. At each corner this frame is drilled to receive one of the links 15. The frame is then bolted to the links l5 by means of upper and lower nuts I8. As will be noted from Fig. 3, the frame I7 is held parallel to the warp threads l2 and in the plane of the lower .ends of the drop wires Ill.

The frame 51 has a series of cross bars i9. Each of these bars is disposed in a vertical plane with its upper edge chamfered to form a beveled edge as shown at 29 in Fig. 5. The bars l9 are spaced parallel and transversely of the frame a distance suflicient to accommodate a relatively small group of drop wires.

As indicated in Fig. 2, the drop wires are thus broken up into groups between adjacent bars l9. In the example illustrated, 24 drop wires constitute a normal group.

During the normal operation of the warp motion, the drop wires may follow the movementsof the individual threads l2. However, any tendency to rock or be displaced from the normal spacing, is prevented by the considerable number of cross bars 19. Thus the drop wires cannot become crowded beyond the position occupied by the nearest bar [9.

In the event of thread breakage, the affected drop wire falls and must be restored by the weaver. In this operation, the weaver has only a limited distance through which he may part the drop wires and separate them for working on the broken thread. The cross bars 19 limit this displacement and prevent disturbance of more than a limited number of drop wires.

After the thread has been mended or replaced, the weaver is expected to rearrange the immediately adjacent drop wires so that their spacing will be uniform. In the event that this is omitted or slighted, the position of the adjacent cross bars will serve to bring the displaced drop wires back into normal arrangement in a short period of normal operation. It will also prevent them from rocking from side to side.

The arrangement above described will improve the operation of the loom in several ways. The time and labor required for repair of the broken threads will be greatly reduced. Wave effects" due to displaced drop wires will be prevented. Irregular marking of the woven product is also minimized.

I have shown and described the preferred form of the invention. However, it may be varied in numerous ways as to proportions and materials without departing from the scope of the invention as defined in the following claims.

What I claim is:

1. A retainer for drop wires comprising a substantially planar frame, upright links bolted at the frame corners, attaching means on the free ends of the links for dependent attachment to the frame of a loom, and a series of spaced retaining elements extending transversely of the frame and in the same plane.

2. A retainer for drop wires comprising a substantially planar frame, upright links bolted at the frame corners, attaching means on the free "ends of the links for dependent attachment to the frame of a loom, and a series of parallel spaced bars extending transversely of the frame and in the same plane.

3. A retainer for drop wires comprising a substantially planar frame, upright links bolted at the frame corners, attaching means on the free -ends of the links for dependent attachment to the frame of a loom, and a series of spaced parallel vertically disposed edged blades extending,

P the free ends of the links for dependent attachment to the cross-rods of the loom, and aseries of spaced retaining elements extending transversely of the frame and in the same plane.

WALTER N. TUCK.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,409,427 Stimpson Mar. 14, 1922 1,693,776 Davis Dec. 4, 1928 1,760,967 Shutt June 3, 1930

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