US3701246A - Ring threading tool - Google Patents

Abstract

A tool for use in threading an advancing strand through a hole comprising a body member, severing means carried by the body member, a yieldable guide carried by the body member, said guide being biased toward a first position in which it blocks engagement of a strand with the severing means and being movable toward a second position in which it permits engagement of the strand with the severing means, whereby a strand may be engaged with the guide so that tension in the strand tends to urge the guide toward its second position and when the tension in the strand is sufficiently high to overcome the biasing force of the guide, the latter moves to permit the strand to engage and be severed by the severing means.

Description

United States Patent Greenway [54] RING THREADING TOOL [72] Inventor: John Michael Greeuway, Harrogate,

England [73] Assignee: Imperial 21] Appl. No.: 110,846

[30] Foreign Application Priority Data Feb. 5, 1970 Great Britain"; ..5,592l70 [52] US. Cl. ..57/34 R [51] Int. Cl. ..D0lh 17/00 [58] Field of Search ..57/1, 34 R, 34 TT, 52, 53, 57/156; 81/3; 83/909; 223/99 [56] References Cited UNITED STATES PATENTS 2,822,661 2/1958 Farrady et al. ..57/34 1,959,452 5/1934 Welch ..57/34 TT [451 Oct. 31, 1972 2,572,138 10/0195 Griset,Jr. ..57/34TT 2,855,748 10/1958 Baumgarten et a1 ..57/34 2,949,722 8/1960 Henry et al. ..57/34 Primary Examiner-Werner H. Schroeder Att0mey-Cushman, Darby & Cushman [5 7] ABSTRACT A tool for use in threading an advancing strand through a hole comprising a body member, severing means carried by the body-member, a yieldable guide carried by the body member, said guide being biased toward a first position in which it blocks engagement of a strand with the severing means and being movable toward a second position in which it permits engagement of the strand with the severing means, whereby a strand may be engaged with the guide so that tension in the strand tends to urge the guide toward its second position and when the tension in the strand is sufficiently high to overcome the biasing force of the guide, the latter moves to permit the strand to engage and be severed by the severing means.

7 Claims, 3 Drawing Figures SHEET 1 OF 2 P'A'TEN'TEDnm s 1 m2 PA'TENTEDBBI 31 1912 3. 701. 24s

SHEEI 2 OF 2 Home y e RING THREADING TOOL This invention concerns a tool for threading an advancing strand through a hole such as the ring of a ring and traveller wind up mechanism.

According to this invention we provide a threading tool for threading an advancing strand through a hole comprising strand severing means and a yieldable guide effective to move a strand deflected round the guide into engagement with the severing means when the tension in the strand round the guide rises to a predetermined value.

Usually when it is required to thread a strand through a hole an end of the strand is available. Sometimes however it is required to thread a strand continuously advancing between supply means and collection means through a hole between such supply means and collection means. Such a strand may be deflected through the hole by the yieldable guide of tool according to the invention and entrained in a second collection means at a point between the hole and the guide, forming a threadline travelling through the hole to the collection means and a loop round the guide and back through the hole, whereby tightening of such loop by the collection means deflects the yieldable guide, moving the loop into contact with a severing means.

For the severing means we prefer to use a single sharpv cutting blade but other known severing means may be used such as two blades in acute angled contact, blades moving relatively to each other in cutting action, or hot wires or flames.

A convenient collection means is a conventional air suction gun and aspirator device, and conveniently the same suction gun may be used for the first and second collection means. The apparatus of the invention may however be used in conjunction with one or more other collection devices such as small mobile driven spindles.

One preferred embodiment of the invention will now be described by way of example with reference to the drawings accompanying the provisional specification in which FIG. 1 is a view of the threading tool partly in section,.

F IG. 2 illustrates the position of the tool of FIG. 1 in use as it is first engaged with a threadline, and

FIG. 3 illustrates the position of the tool when the threadline is about to be cut.

Referring to FIG. 1, the tool comprises a guide notch 1 in an arm 2 pivotally mounted by means ofa pin 3 on one limb of a U-shaped member 4. A spring 5 urges the arm 2 into contact with a recess 6 in the other limb of the U-shaped member 4 which is mounted on a rod 8 with a handle 9. A blade 7 is attached across the limbs of member 4.

The threading tool illustrated in FIG. 1 may be used in conjunction with a suction gun collection device as illustrated in FIGS. 2 and 3. Referring to FIG. 2, a running threadline 10 is entrained with a suction gun running threadline through the ring to the suction gun and a loop from the suction gun, round the guide notch l and the ring 12, and back to the suction gun. This loop tightens under the suction until. it moves the yieldable guide and is cut on the blade. The two ends are then collected by the suction gun.

This method is appropriate for use with a threadline comprising continuous filaments. A threadline comprising only staple fibers has little strength before beingtwisted and then the tool of this invention may be used in conjunction with a suction gun which also imparts sufficient false twist to provide adequate threadline strength to permit operation of the tool before twist is imparted by thetraveller.

What we claim is:

1. A tool for use in threading an advancing strand through a hole comprising a body member, severing means carried by the body member, a yieldable guide carried by the body member, said guide being biased toward a first position in which it blocks engagement of a strand with the severing means and being movable toward a second position in which it permits engagement of the strand with the severing means, whereby a strand may be'engaged with the guide so that tension in the strand tends to urge the guide toward its second position and when the tension in the strand is sufficiently high to overcome the biasing force of the guide, the latter moves to permit the strand to engage and be severed by the severing means.

2. A tool as in claim 1 wherein the yieldable guide is constructed to release the strand as the guide moves toward its second position.

3. A tool as in claim 1 wherein the severing means is a cutting blade.

4. A tool as in claim 1 wherein the yieldable guide is a pivoted spring biased arm.

5. A tool as in claim 1 wherein the yieldable guide is provided with a strand-guiding notch.

6. A tool as in claim 1 wherein said body member includes an elongated rod, said severing means and said yieldable guide being carried by said rod near one dnd thereof.

7. A tool as in claim 6 wherein said severing means is a cutting edge facing generally in a direction along the length of the rod and wherein said guide is a pivoted arm which is spring-biased in said direction and into engagement with stop means carried by the rod.

Claims (7)

1. A tool for use in threading an advancing strand through a hole comprising a body member, severing means carried by the body member, a yieldable guide carried by the body member, said guide being biased toward a first position in which it blocks engagement of a strand with the severing means and being movable toward a second position in which it permits engagement of the strand with the severing means, whereby a strand may be engaged with the guide so that tension in the strand tends to urge the guide toward its second position and when the tension in the strand is sufficiently high to overcome the biasing force of the guide, the latter moves to permit the strand to engage and be severed by the severing means.

2. A tool as in claim 1 wherein the yieldable guide is constructed to release the strand as the guide moves toward its second position.

3. A tool as in claim 1 wherein the severing means is a cutting blade.

4. A tool as in claim 1 wherein the yieldable guide is a pivoted spring biased arm.

5. A tool as in claim 1 wherein the yieldable guide is provided with a strand-guiding notch.

6. A tool as in claim 1 wherein said body member includes an elongated rod, said severing means and said yieldable guide being carried by said rod near one end thereof.

7. A tool as in claim 6 wherein said severing means is a cutting edge facing generally in a direction along the length of the rod and wherein said guide is a pivoted arm which is spring-biased in said direction and into engagement with stop means carried by the rod.

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