US2148527A - Thread cutter for looms - Google Patents

Description

Feb. 28, 1939. 1 G, BROOKS 2,148,527 A l* THREAD CUTTER FOR Looms' Filed Dec. 17, 1957 M am QQ Em W77 JASPER @..gg

Patented Feb. 28, 1939 AUNITED STATES PATENT `OFFICE Jasper G. Brooks, Bemis, Tenn.

Application December 17, 1937, Serial No. 180,397

3 Claims.

This -invention relates toan improvement in a `thread Acutting 'itemple for looms and more `especially to means which :assist the thread cutting A.apparatus to more effectively engage and cut the loose ends lnear the selvedge 4of the cloth. It is a well-'known fact that when the yarn on a bobbin has vexhausted and `another bobbin is introduced that loose lends of yarn will be left extending beyond the selvedge of the cloth. It is desirable `that these loose ends be sheared as closely to the edge of the cloth as possible so that the nished product will not have loose -ends `extending ther-efrom.

In thread cutting temples heretofore provided `great difficu-ltyhas ibeen experienced in the failure `of `t'hecutting 'means to lproperly 'engage the loose ends. For example, the loose end, having very little 'tension applied thereto will frequently fall below'the cutting knives and consequently will not 'be shearedwhen the cutting knives are operated.

It is, therefore, an object of this invention to provide a thread cutting attachment for loom temples which is adapted to cut 'the ends of lling threads left extending .beyond the selvedg-e of the cloth during the weaving of the same, with an additional pivoted serrated arm attached to one of the cutting members for engaging the loose ,ends and directing them between the `jaws of the `cutting members.

It is a further objectief this invention to provide a thread cutting temple comprising a movable cutting member and a `companion stationary cutting'member with a serrated member pivoted to the movable cutting member for directing an end of yarn between the cutting members and holding it in place while a severing operation takes place.

Some of the objects of the invention having been stated, other objects will app-ear as the description proceeds when taken in connection with the accompanying drawing, in which- Fgure 1 is a plan View of a loom temple head and cover therefor, showing my invention applied thereto;

Figure 2 is an elevation looking at the right hand side of Figure 1;

Figure Bis a vertical sectional view taken along the line 3 3 in Figure l, showing my invention in normal position, that is, when the shearing means is not being actuated;

Figure 4 is a view similar to Figure 3 but showing the position occupied by the movable cutting member and the auxiliary serrated pivoted arm after a strand of yarn has been severed;

Figure 5 is an isometric view of one end of the -movable cutting member showing the auxiliary serrated yarn engaging arm pivoted thereto;

Figure 6 is an isometric view looking at Vthe opposite side of the cutting member from that shown in Figure l and showing the cutting `edge B of this member.

Referring more specifically to the drawing the numeral IIJ indicates the temple bar having a head portion II formed integral therewith, said head portion having a cap or cover I2 therefor. 1D Rotatably mounted in the cover I2, between screws M and I5 is a temple roll I6, whose periphery contacts the cloth as it is being woven, and holds it in the proper position. The head I"I is provided with a depending heel I1 which is adapt- 'l 'ed to be struck by a loom lay upon its beat-up movement to move the temple forward in the usual well-known manner and to eiiect a shearing operation of any loose iilling projecting beyond the selvedge of the cloth.

The head il and cover I?. are provided with a suitable groove I3 which forms a guide-way in which the movable thread cutting device I9 is mounted. rThe thread cutting device I9 has an i i overhanging down-turned bill Zi integral with one 2s end vthereof and this bill is provid-ed with a cutting edge 25a, said edge being disposed adjacent one sideof shearing plate 2l. The shearing plate 2l is mounted in the temple head I2 and held in stationary `position by any suitable means such as screw 22. The head of `the screw 22 is adapted to rest in slot 2Ia of the stationary cutting plate 2i. The plate 2I also has cutting edges 2lb andv 214C which cooperate with the cutting edge 20a for severing a loose end, the cutting edge 2Ic being on the upper side of an outstanding projection 2id which acts as a support for holding the thread in position when the cutting edge Zta ismoved downwardly and rearwardly to cause a in shearing operation to take place.

The movable knife I9 has laterally projecting flanges 25 integral with the back side thereof, which anges are adapted to normally rest against edge 2E of head I I when the parts are in a normal 45 position as shown in Figure 3. In order to normally force the movable knife to this position,

a suitable torsion spring 21 is provided, the upper end of said torsion spring being mounted around pin 28 projecting from temple bar ID, and the 50 lower end of said spring being mounted around pin 29 in heel portion 30. This heel portion is integral with the rear portion of cutting mem ber I9, and is adapted to be contacted by the loom lay to cause the cutting member to be rotated 55 =s1ightly in a clockwise manner from the position shown in Figure 3 to the position shown in Figure 4, whenever a filling thread is desired to be severed.

As heretofore stated, some diiliculty has been encountered in the failure of the cutting edges 20a, 2 Ib and 2 Ic to properly engage the projecting filling each time the thread on a bobbin has exhausted or a new bobbin has been introduced. Therefore, I have recessed a portion of the cutting member I 9 as at 32 and in this recess I have pivoted an arm 33 as at 34, It will be noted that the lower portion of this serrated arm is rounded and normally rests on the bottom of slot I8. This member is also provided with a plurality of serrations in the upper portion thereof, which serrations are adapted to receive a projecting filling thread and assist the projections 2id of plate 2l in holding said thread in the position for cutting.

It will be noted also that the free-end of serrated member 33 is disposed on one side of the down-turned bill 20 and the projection 2Id is disposed on the other; consequently, when a cutting operation takes place, the lowermost point of the bill 20 can move into a side by side relationship with the free end of serrated arm 33 in the manner shown in Figure 4 to allow the thread which might be in the serrations 35 to be slightly elevated, thereby forcing the thread into the jaws of the shearing mechanism. In order to make it possible however for the free end of the serrated member 33 to move into a side-by-side relationship with the lower end of the bill 20, it is necessary to bevel the adjacent face 20h of this bill in the manner shown in Figures 2 and 5.

It is thus seen that when a strand of filling is drawn across serrations 35 and cutting edge 2Ic that it is in position to` be sheared. Then the movable cutting member I9 is moved to the left from the position shown in Figure 3 to the position shown in Figure 4. During this movement the serrations will positively draw through the lling along the cutting member to insure that it will not escape being severed.

By referring to Figures 1 and 2, it will be noted that another plate 38 is provided in the cover I2. This plate has a notch 38a therein, in which the head of screw 22 is adapted to t so that the plate 38 will be rmly held in position. The lower end of this plate has one face thereof adjacent the left-hand edge of cutting member I9 (Figure 2). It will also` be noted that a set screw 39 is threadably secured in the cover I2 with a locknut 40 threadably secured thereon. The righthand end of set screw 39 (Figure 1) communicates with the slot I8 and is adapted to be normally pressed against the lower end of plate 38 which also projects into this slot. When it is desired to increase the pressure between the cutting edges 20a, and 2lb, it is only necessary to manipulate the set screw 29 thereby forcing the lower end of plate 38 against the bill portion 20 of cutting member I9. This pressure, of course, will cause a corresponding pressure to be exerted between the cutting edge 29a on the opposite side of bill 20 and the cutting edge 2|a of plate 2|.

It is, therefore, seen that I have provided an auxiliary thread engaging means to be attached to a temple thread cutter, said device being pivoted to the movable knife and operable upon the movement of said knife to hold the thread in proper contact with the cutting edges during a severing operation.

In the drawing and specification there has been set forth a preferred embodiment of the invention, and although specific terms are employed, they are used in a generic and descriptive sense only, and not for purposes of limitation, the scope of the invention being set forth in the appended claims.

I claim:

l. In a thread cutter for looms comprising a movable cutting member and a companion stationary cutting member, a slide in which the movable cutting member is disposed for sliding movement, a member pivoted to the movable cutting member at one end having the lower edge of its intermediate portion resting on the bottom of the slide, said pivoted member having the upper surface of its free end serrated for engaging the thread and moving it beneath the movable cutting member upon movement of the movable cutting member.

2. In a loom temple having a thread cutter comprising a stationary cutter having a slide associated therewith, a movable cutter operable in said slide upon predetermined occasions with relation to the stationary cutter for severing a thread, said movable cutter having rotary and sliding movement in said slide, a member pivotally mounted at one end to an intermediate portion of the movable cutter and being serrated on the upper edge of its other end and engaging the bottom of said slide upon movement of the movable cutter to move the free serrated end of the said member past the cutting end of the movable cutter to hold the thread in the path of the movable cutter.

3. In a thread cutter for looms, a member having a slot therein, a cutter mounted for sliding and rotary movement in said slot, a member pivoted at one end on an intermediate portion of said cutter and having its free end extending below the cutting edge of the cutter, the free end of said member being dull and serrated on its upper edge at its outer free end and normally resting in the bottom of said slot, and being movable by movement of the cutter and its engagement with the bottom of said slot for moving the free serrated end past the cutting edge of said cutter to thereby hold the thread while it is engaged by said cutter.

JASPER G. BROOKS.

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