US1817112A - Thread cutting mechanism for double shuttle looms - Google Patents

Description

1931. R. G. TURNER 1,817,112

THREAD CUTTING MECHANISM FOR DOUBLE SHUTTLE LOOMS Filed March so, 1929 s SHeets-Sheet 1.

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THREAD CUTTING MECHANISM FOR DOUBLE SHUTTLE LOOMS 5 Sheets-Sheet 2 Filed March 30, 1929 [We/ra or jg ahva Zm "Wm *M I F55 TD Aug. 4, 1931 R. G. TURNER 7,

THREAD CUTTING MECHANISM FOR DOUBLE SHUTTLE LOOMS Filed March 30, 1929 3 Sheets-Sheet 3 6/ [We/21 0f IZMa/c/ Zmer Patented Aug. 4, 1931 UNITED STATES PATENT OFFICE RICHARD G. TURNER, OF WORCESTER, MASSACHUSETTS, ASSIGNOR TO CROMPTON & KNOWLES LOOM WORKS, OF WORCESTER, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS THREAD CUTTING MECHANISM FOR DOUBLE SHUTTLE LOOMS Application filed March 30, 1929.

This invention relates to a weft replenishing loom in which a double shed is provided and in which a separate shuttle is operated in each shed.

v It it the object of my invention to provide selective thread cutting mechanism for such a loom, so designed that the outgoing weft in either the upper or lower shuttle may be eflectively severed upon ejection of a weft carrier from said shuttle.

' Another object of the invention is to provide a thread cutting mechanism comprising a separate thread cutting device for each of the upper and lower shuttles, together 5 with selective actuating mechanism there for, and means for separately adjusting the setting thereof.

A further feature of the invention relates to the provision of a thread cutter mounted .20 on the lay and so constructed that it will be projected forward toward the weft as the blades are closed to sever the thread.

My invention further relates to arrangements and combinations of parts which will be hereinafter described and more particularly pointed out in the appended claims.

A preferred form is shown in the drawings in which I v Fig. 1 is a plan view of parts of a loom embodying my improvements;

Fig. 2 is a sectional end elevation, taken along the line 22 in Fig. 1;

Fig. 3 is a side elevation, partly insection, of my improved thread cutting devices;

Fig. 4 is a view similar to Fig. 8, but showing the parts in a differentposition;

Figs. 5 and 6 are detail sectional plan views, taken along the lines 5-5 and 66 in Fig. 4 respectively;

Fig. 7 is a detail sectional elevation, taken along the line 7'. in Fig. 2, and Fig. 8is a detail section, taken along the line 8-8 in Fi 4.

Referring to the drawings, I have shown 2* portions of a double shuttle loomincluding a lay 10 mounted on swords 11 in a loom frame 12. A reed 13 is secured in place on the lay 10 by the usual hand rail or clamp 14. A vertical stationary magazine 20 mounted on the breast beam 22 and a pair of trans- Serial No. 351,297.

ferrers 24 and 26 are slid-ably mounted in a stand 28 in front of the magazine 20.

The transferrcrs 24 and 26 are actuated by levers 30 and 31 (Fig. 1) by which they are selectively moved rearward upon indication of weft exhaustion and thereby transfer weft carriers to the upper and lower shuttles respectively.

For a more complete description of the magazine and transfer mechanism, reference is made to my prior application, Serial No. 300,279, filed August 17, 1928.

The present application relates more particularly to the mechanism which I have provided for cutting the outgoing weft as a bobbin is ejected from the upper shuttle S or from the lower shuttle S My improved thread cutting devices are mounted on a pair of supporting plates and 42 (Fig. 3) clamped in vertical parallel relation on a bar 43 1) secured to an upward projection of the sword 11.

The thread cutter for the lower shuttle comprises a cutting member or blade 45 (Fig. 3) pivoted at 46 to the frame 40. A second cutting member 48 is pivotally connected by a stud 49 to an intermediate point in the length of the cutting member 45. The member 48 is also provided with a stud 50 extending loosely through a vertical slot 51 in the supporting plate 40. A spring 52 is connected at its upper end to an offset portion 53 of the plate 40 and at its lower end to the upper end of the cutting member 48.

A U-shaped spring clamp (Fig. embraces the cutting members 45 and 48 and is held in position by the stud. 49 which extends through openings in the ends of the clamp 55. The clamp serves to press the cutting men1 bers 45 and 48 yieldingly together, thus assuring effective cutting action.

A pull wire is attached to the upper end of the cutting member 48 and extends through a. tubing 62 along a circuitous path to a bracket 64 (Fig. 2) secured to the front of the breast beam 22. The tubing (52 is secured in the bracket 64 by a. clamp (36 and clamping screw 67 (Fig. 7). The end of the pull wire 60 is secured to a screw 68 (Fig. 1) fixed in the end of the transfer actuating lever 31.

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The second end of the tubing 62 is anchored at 69 (Fig. 3) in the stand or plate 10.

As the lever 31 moves rearward to transfer a bobbin, the wire 60 will be pulled downward in the portion shown in Fig. 3 and the cutting members 45 and 48 will be moved from the position shown in Fig. 3 to that shown in Fig. l. During this movement, it will be noted that the cutting blades are not only closed with a scissor action, but that they are also projected forward in front of the reed 13 and to a position to grasp and sever the out-going weft.

The construction and operation .of the second pair of cutting blades 70 and 71 for the upper shuttle S is substantially identical with theconstruction previously described. A second pull wire 72 is provided for the blade 71 and is guided through a second tube M anchored at one end to the plate 42 and at the other end to the bracket 6% by a clamp 75 and screw 7 6. (Fig. 7)

The effective length of the pull wires 60 or 72 may be readily adjusted by inserting or withdrawing the tubes 62 or 7 1 in the bracket 64. If a tube is drawn forward relative to the bracket 64:, the effective distance measured along the tubing from the bracket 64 to the anchorage in the plate 40 or {l2 will be increased and the effective length of the wires 60 ,or 72 will be correspondingly decreased. This method of adjustment is more conven-' ient than the actual lengthening or shorten ing of the wires at their points of attachment to the transferrer levers or to the cutting members. Y

Having described the details 'of c'onstruction of my invention, it willbe seen that I have provided simple and effective thread cutting mechanism for a double shuttle loom by which the outgoing weft in either shuttle may be effectively severed whenever that particular shuttle is to be replenished. The thread cutters are normally withdrawn rear ward of the plane of the front edges of the reed 1-3 but are moved forward and downward to grasp and sever the thread during the cutting operation. The thread cutters are operated only upon actual ejection of a weftcarrier, being directly connected to the 11'lCl11-- nism by which the transfer is effected.

Having thus described my invention and the advantages thereof, I do not wish to be limited to the details herein disclosed, other wise than as set forth in the claims, but what I claim is v 1. In a weft replenishing loom, a pair of shuttles operable in superposed paths between the same terminal limits, a single sta-. tionary magazine for replenishing said two shuttles, separate means to transfer a weft carrier horizontally from said magazine to the upper or to the lower shuttle, separate but closely associated devices for severing the out-going weft for each shuttle on weft ejection, said separate devices being mounted on the lay and being normally positioned rearward of the paths of the shuttles and each device being effective to sever the weft outside of'the exhausted shuttle, and separately controlled operating means for advancing and actuating each severing device upon transfer to the corresponding shuttle.

2. Inaweftreplenishing loom, apair ofshuttles operable in superposed paths between the same terminal limits, a single stationary ma gazine for replenishing said two shuttles, separate means to transfer a weft carrier to each shuttle, and separate. but closely associated severing devices mounted on the lay and at different elevations above the lay, each severing device being associated with one ofjsaid transfer means and being effective to sever the out-going weft for the associated shuttle at weft ejection, said transfer means and said associated severing device being operated substantially simultaneously for each shuttle and thcweft being severed outside of the 8X- hausted shuttle. I

3. In a weft replenishing loom, a pairof shuttles operable in superposed paths, aseparate transferrer'for each shuttle, a thread cutter for the outgoing weft in each shuttle mounted outside of and independent of the shuttle, and a direct operating connection from each transferrer to its associated thread cutter whereby the thread is severed outside of the outgoing shuttle.

4. In a weft replenishing loom, a pair of shuttles operable in superposed paths, a transferrerfor each shuttle, athread cutter for the outgoing weft in each shuttle, a wire directly connecting each thread cutter to its associated transferrer, a tubing in which each wire is slidable, and supports in which the ends of said tubing aresecured adjacent said thread cutter and said transferrer respectively.

5; Thecombination ina loom as set forth in claim 4, in which provision is made for adjustably securing one end of each tubing in its support, whereby the effective length of the wire between a transferrer and its associated thread cutter may be variably determined. I V

6. In a loom, a lay, a stand on said lay, athread cutting blade pivoted at one end to said stand, a second blade having a floating. pivotal connection to said first bladeand having a stud and slot connection with said stand, means topositively close said blades with a cutting action, and a spring to yieldinglyrestore said blades to inoperative open position.

fixed my signature.

In testimony whereof I have hereunto afits

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