US1899634A

US1899634A - Thread cutter and shuttle therefor

Info

Publication number: US1899634A
Application number: US517561A
Authority: US
Inventors: Oscar V Payne
Original assignee: Crompton and Knowles Corp
Current assignee: Crompton and Knowles Corp
Priority date: 1931-02-21
Filing date: 1931-02-21
Publication date: 1933-02-28
Anticipated expiration: 1950-02-28

Description

Feb. 28, 1933. O V PAYNE 1,899,634

THREAD CUTTER A ND SHUTTLE THEREFOR Original Filed Feb. 21, 1931 fv I/EN T01? 0504/? l/. P4 )(NE Patented Feb. 28, 1933 UNITED STATES PATENT OFFICE OSCAR V. PAYNE, OF WOBCESTER,. MASSACHUSETTS, ASSIGNOR TO CROMITON KNOWLES LOOM WORKS, 0F WORCESTER, MASSACHUSETTS,

MASSACHUSETTS A conro mrron or THREAD ou'rrnn; AND SHUTTLE THEREFOR Application filed February 21, 1931, Serial No. 517,561. ltenjewed A ugust w, 1932.

This invention relates to improvements in means for cutting the thread which extends from the shuttle back to the adjacent selvage on a transferringpick of an automatic loom and it is the general object of the invention to provide a simple and efficient device of this kind constructed to act on the weft at a plurality of points. 1

In weft replenishing looms there is usually a weft end extending from the selvage through the shuttle eye to the outgoing bobbin on transferringpicks of the loom, and unless this thread is withdrawn itis likely to be whipped into the shed on a subsequent pick of the shuttle. It is an-important object of my present invention to provide means for parting this weft end adjacent the shuttle eye preferably by a force derived in part at least from the forward movement of the lay and efiective tooffer more than one opportunity for the severance of the thread. s

It is a further object of my invention to provide a shuttle having a notched plate to coact with a wedge shaped cutter in such a way that at least two different cuttingsurfaces or edges are brought into play for the purpose of increasing the likelihood that the weft will be parted. f

With these and other objects in view which will appear as the description proceeds, my invention resides in the, combination and arrangement of parts hereinafter described and set forth in the claims.

In the accompanying drawing, wherein a convenient embodiment of my invention is set forth,

Fig. lshows a front elevation of the thread parting mechanism forming the subject matter of my present invention, V

Fig. 2 is a vertical section on line 2-2 of Fig. 1 showing the parts of thecutting mechanism in the relation they assume just prior to the cutting,

Fig. 3 is an enlarged view similar to a por-' tion of Fig. 2 but showing the engagement of the wedge-shaped cutter with two spaced cutting edges on the shuttle, and

Fig. 4 is a detailed vertical section on line H of Fig. 2.

Referring to the drawing, I have shown a shuttle S having a side delivery eye 10 from which the weft W extends A longitudinal groove 11 in substantial horizontal alignment with the delivery eye extends along, the front wall 12 .Of'the shuttle and serves the usual function of providing a passage for the weft leading from the-delivery eye as the shuttleenters the shuttle box not shown. a

A pivoted lever 13 is mounted preferably on stationary structure'indicated at 14 and is controlled so as normally to have its right hand end as viewed inFig. 2 forwardly of the extreme forward position of the shuttle, but moved rearwardly at the time of trans: fer to a-p'osition where it may have contact with a severing'or weft parting surface carried by the shuttleand described hereinafter. The manner of controlling this lover of itself forms nopart of the present invention and it is suflicient for present purposes to the shuttle may comprise a plate 20 secured in a recess 21 located in the front shuttle wall 12; As set forth in 3 this plate may be pro-' vided with a series of vertical corrugations or teeth presenting spaced partingedges 23. The other member comprises a head 30 which may have the forward end thereof slotted as at 31 to receive the bearing element 32 carried by and preferably formed as part of the lever 13. As shown .in Fig. 3, the bearing element is not quite as wide as the slot 31 nor does it extend to therear surface of said slot. As shown in Fig. 4 the element is provided with a bore 33 which is somewhat larger than a supporting pin 34L extending across the slot 31 and secured to the head. 7 The purpose of this construction is to permit the head to have a certain limited universal 100 I movement with respect to the lever in both horizontal and vertical directions.

' The head is provided with two inclined rearwardly facing surfaces 35 substantially vertical which are disposed atan angle to each other which greaterthan the angle of the surfaces of the plate 20 defining the edges 23.

When operating on a transferring pick of the loom with the lever moved rearwardly, as" previously described, the shuttle will advance with the weft W extending from the eye 10 across the plate and into the groove 11. The teeth may be slightly behind the path normally traversed by the weft so as to avoid abrasion and the plate extends both above and below the weft as do also the inclined surfaces of the head. As the shuttleadvances the last named surfaces will engage one or another of the points 23, and because of the ability of thehead to move in a universal direction throughout a limited range of action relatively to the lever, said surfaces will adjust themselves so as to engage two'adjacent cutting edgesf23. As the lay L moves the shuttle forwardly a spring 22will yield to permit rearward motion of the lever and head. Then the lay is in its extreme forward position the parts assume the relationshown in Fig. 3, from which it will be seen that the weft W is pinched between both the surfaces 35 and certain of the cutting edges 23, thus givingdouble assurance that the weft will be parted. 7

From the foregoing it will be seen that I have provided a simple thread cutting 'mecha-' nism carried in .part by the shuttle and comprisingtwo elements so disposed and formed as to present a pair of cutting edges to the weft at the time of transfer. This result is achieved by having the head 30 1nounted so that it may move sufficiently to engage two of the edges 23 despite slight angular or longitudinal displacement of the shuttle relatively to the lever 13. While I have shown the wedge member mounted on the lever and the anvil corrugated member von the shuttle, yet these parts can be interchanged without departing from the spirit of this invention.

Havingthus described my invention it will be seen that changes and modifications may be made therein by those skilled in the art without departing from the spiritand scope of the invention and I do not wish to be limited to the details herein disclosed, but what I claim is: v

1. In thread parting mechanism for looms, a shuttle movable forwardly in the loom v a weft parting member on the shuttle, a second parting member mounted independently of the shuttle one of th members having spaced cutting edges, and the other member having a pair of inclined surfaces each disposedto engage one of the edges.

2. In thread cutting mechanism for a weft said edges and part said weft.

replenishing loom, a shuttle, and a pair of coacting thread severing members each having wedge shaped portions and one of which is carried by the shuttle.

3. In thread parting mechanism for a weft replenishing loom, a shuttle movable forwardly in the loom, and a pair of coacting thread parting members one of which is carspaced vertical cutting edges carried by the shuttle, and a wedge mounted independently of the shuttle to coact with the edges as the shuttle advances to sever the weft.

5. In thread partin'g mechanism for a weft replenishing loom, a shuttle movable forwardly in the loom, a pair of weft parting members one of which is mounted on the shuttle and the other of which is mounted independently of the shuttle, oneof said members having. a pluralityof horizontally spaced substantially vertical cutting edges,

the other member having a surface to engage at least two of the cutting edges as the shuttle moves forwardly to force the weft against 6. In thread parting mechanism for a weft replenishing loom, a shuttle movable forwardly in the-loom, a pair o f'weft parting members one of which is carried by the front wall of the shuttle and the other of which is mounted to be approached by the first mem- 1105 her as the shuttle advances. one of said members having a plurality of vertical parting edges and the other member having provision by virtue of which the weft is forced against two of the edges to part said .weft.

'7. In thread parting mechanism fora weft replenishing loom, a shuttle movable forwardly in the loom, the weft extending along the shuttle, a nd a pair of coacting members one of which is mounted on the front wall of the shuttle and the other of which is positioned to be approached by the first named member as the shuttle advances.

one of said members having a plurality of parting edges transverse of the weft,. the other of said members having provision by virtue of of which the weftis forced against two of the parting edges. I

8. In thread parting mechanism for a weft replenishing loom, a shuttle movable f forwardly in the loom, and two coacting thread parting members one of which is mounted on the shuttle, said members brought into thread parting relation by ad-" vance movement of the shuttle, said members having provision for acting on the weft at two spaced points.

9. In thread parting mechanism for a Weft replenishing loom, a shuttle movable forwardly in the loom, and a pair of coasting thread parting members one of which is carried on the forward face of the shuttle, one of said members having a plurality of spaced cutting edges and the other having a wedge portion, forward movement of the shuttle effective to move the'wedge portion. between two of the cutting edges to part the weft, one of said members mounted to move angularly in a plane parallel to the length of the shuttle.

10. In thread parting mechanism for a weft replenishing loom, a shuttle movable forwardly in the loom, a pair ofweft parting members one of which is carried by the front wall of the shuttle and the other of which is mounted to be approachedby the first member as the shuttle advances, one of said members having a plurality of vertical parting edges and the other member having pro-v vision by virtue of which the weft is forced against two of the edges to part said weft, one of said members mounted to move angularly in a plane parallel to the length of the shuttle. V

11. In thread parting mechanism for a weft replenishing loom, a shuttle movable forwardly in the loom, a pair of weft parting members one of which is carried by the front wall of the shuttle and the other of which is mounted to be approached by the first member as the shuttle advances, one of said members having a plurality of vertical parting edges and the other member having provision by virtue of which the weft is forced against two of the edges to part said weft, one of said members mounted to move angularly in planes parallel to and transverse of the length of the shuttle.

In testimony whereof I have hereunto affixed my signature.

OSGAB V. PAYNE.