US1715962A - Loom temple - Google Patents

Description

June 4, I929. TURNER 1,715,962

LOOM TEMPLE Filed NOV. 25 1927 as Ed [2 BMW 6 fi/mzr Patented June 4, 1929.

uNiTEn STATES PATENT FFICE.

RICHARD G. TURNER, OF WORCESTER, MASSACHUSETTS, ASSIGNOB TO CROMPTON & KNOWLES LOOM WQRKS, OF WORCESTER, MASSACHUSETTS, A CORPORATION OF LOOM TEMPLE.

Application filed November 25, 1927. Serial No. 235,619.

This invention relates to improvements in selvage forming means for looms and it is the general object of the invention to prevent the selvage warp threads from being crowded together too tightly.

In the weaving of tire fabrics or other fabrics which are to be impregnated with a rubberizing compound it isdesirable that the warp threads be separated sufliciently to afford a space into which may flow the comound with which the fabric is to be treated;

t has been found that with the tension necessary on the filling to leave the fabric of the requisite strength the selvage warp threads are likely to be drawn in slightly and crowded together. It is not an uncommon thing to find the threads within one-half an inch or so of each selvage to be packed together so tight 1y that rubberizing compound will not pass through them to fill interstices in the fabric, and it is not unusual to cut the edges of the fabric so as to eliminate these portions where the warp threads are tightly bound together.

Attem ts have been made to correct this defeet by the use of ordinary temples but the latter necessarily operate on the fabric in ad- Vance of the fell and for this reason are ineffective to cure the defects mentioned. It is an important object of my present invention to provide a pair of devices, one located above and the other below the fabric, which shall pinch the warp threads a slight distance behind the fell. By the use of this device when the shuttle is entering the shed the filling will be drawn from the adjacent selvage rearwardly a short distance, depending upon the location of the pinching device, and will then extend into the fabric. At the time of beat up the pinching device is of course moved forwardly to be out of the path of the reed and the small amount by which the filling extended rearwardy before entering the shed provides the sack which enables the selvage warp threads to be far enough apart to take the rubberizing compound.

It is a further object of my present invention to provide means for providing an auxiliary shed near each selvage, the upper and lower planes of the auxiliary shed coming to a point slightly behind the fell of the cloth or the main shed of the loom, the purpose bemg to provide a small amount of slackness in the filling, the threads forming the auX- iliary shed assuming the same position as the threads in the main sheds of the loom at the time of heat up to provide said slackness. In this way any tendency of the filling to draw the warp selvages inwardly is counteracted.

It is a further object of my invention to provide means whereby the cooperating pinching elements are separated by the forward movement of the device after the shuttle has been positioned on the opposite side of the loom. This avoids unnecessary rubbing of the warp selvage threads and prevents undesirable abrasion.

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 drawings wherein one form of my invention is shown,

Fig. 1 is a top plan view of a selvage former made according to my present invention showing the cloth and the'warp threads with the device extending beyond the fell of the cloth,

Fig. 2 is a vertical section on line 2-2 of Fig. l showing the selvage former in normal position,

Fig. 3 is a'view similar to Fig. 2 but with the lay moved to beating in position and with the elements of the pinching device separated to prevent wear of the selvage warp threads.

Fig. a is an enlarged vertical section on line 4le of Fig. 2,

Fig. 5 is a rear elevation .on an enlarged scale of the pinching elements, taken in the direction of arrow 5, Fig. 2, and

Fig. 6 is a detail top plan of one of the selvages together with the upper pinching element.

Referring to the drawings I have shown a breast beam 10 and the lay 11 of a loom and have provided a forwardly yieldable member 12 having a body 18 which extends into a housing 14. The member 12 is held rearwardly by a compression spring 15 interposed between a shoulder 16 on the member and the forward portion ofthe casing. Said spring surrounds the shank17 of the body and is compressed at each beat up of the loom. The shank is slabbed as at 17 to be held in erect position, a construction common in loom temples.

The rear portion of the body 13 has a de pending foot 18 which cooperates with hunter 19 carried by the lay 11, the hunter engaging the foot 18 to move the member 12 forwardly against the action of the spring 15.

The underside of the casing 14 may have a guide rib 20 to be received by a corresponding groove 21 formed in a plate 22 secured to the breast beam. An upstanding ear 23 cast integral with casing 14 has threaded therethrough a screw 24: which extends forwardly through a pair of spaced cars 25 projecting vertically from and cast with the plate 22. A collar 26 fastened to the screw engages one side of the cars 25 while the head 27 of the screw engages the other side of the ears, so that turning of the screw moves the casing relatively to the loom frame. A look nut 28 is provided for holding the screw and there fore the casing in any adjusted position toward or from the lay. Screws S threaded into the plate 22 as shown in Fig. 4c afford additional means for holding the casing to the loom frame.

The warp pinching device comprises a pair of jaws or elements one of which is secured directly to the member 13, shown at 29, to engage the underside of the warp selvage threads 11, said element being formed particularly as shown in Figs. 2, 3 and 5 and having an upwardly curved smooth rounded thread engaging portion 30 which lies directly under a second corresponding pinching element 31 engaging the upper selvage warp threads. Said element 31 is supported by and moves with the lever 32 pivoted on a stud 33 carried by and moving with the body 13. heavy compression spring 34: interposed between the upper pinching element 31 and an adjusting screw 35 held in adjusted position in the body 13 tends normally to hold the upper element 31 in down position as shown in Fig. 2. The forward end of the lever 32 is provided with an inclined cam face 36 which cooperates with the underside of an eccentric lever actuating collar 37 held to the fixed casing by a screw 38. As shown in Fig. 4 it is possible to change the angular position of the eccentric 37 by loosening the screw 38 so that the amount of angular movement of the lever 32 around the stud 33 may be varied and also the time at which the pinching elements shall begin to separate on the forward beat of the loom may be varied.

In operation when the lay is in its rear position the spring 15 will hold the body 13 and therefore the pinching elements in rearmost position and as shown in Figs. 1, 2 and 6 this position will be somewhat behind the fell of the cloth or that point where the warp threads join the cloth. As shown in Fig. 1 the shuttle has been picked to the opposite is attached to the cloth C at the fell has a rearwardly extending portion 11 which lies substantially parallel to the warp threads. After passing behind the pincl'iing elements the filling is free to follow the shuttle into the auxiliary shed defined by the selvage warp threads W The auxiliary shed of warp threads 1V lies somewhat behind the main shed indicated at JV, the planes of the shed of warp threades 1V intersecting bchind the fell 40 of the cloth. As the lay advances the filling F will be beaten into the cloth in the usual manner but bunter 19 will engage the foot 18 sufficiently early in the advance of the lay to move the pinching elements forwardly to and beyond the fell of the cloth as shown in F 3. The forward movement of the body 13 causes an oscillation of the lever 32 in a counter-cloclnvise direction around stud 33 so that the cloth and the warp threads W will not be subjected to sliding frictional engagement with said ele ments as the hunter 19 moves the foot 18 forwardly. .I have found in actual practice that the device will work satisfactorily without mounting the upper element 31 so that the same will move away from the lower element, but it is preferable to employ a device such as lever 32 or its equivalent to lift the upper element to spare the yarn unnecessary abra sion. As the lay recedes the spring 15 will 7 move the pinching elements rearwardly and the spring 34 will move the upper element downwardly as quickly as it is permitted to do so by the cam 36 in engagement with the eccentric 37.

This operation continues throughout the weaving of the cloth and there results a sufiicient openness of weaving at the selvage so that the cloth may be impregnated by a rubberizing compound throughout its width. It is important to have the pinching jaws extend behind the fell of the cloth, the reason for this being that the short portion 41 of the filling provides the necessary slackness to permit the selvage warps to be properly spaced. By the use of the device set forth herein the usual tension of the shuttle may be maintained so that as tightly as desired to produce a firm fabric.

A detailed feature of the invention is set forth in Fig. 5 where it will be seen that the pinching elements have rounded ends 45 extending upwardly and below the cloth C so that the filling when being drawn from the fell of the cloth will be directed by said curved edges into the auxiliary shed rather than be hooked improperly aroundone or the other of said elements. I find in actual practice that the filling does not come in direct contact with the pinching elements when being drawn into the shed but engages the selvage warps W. Further reference to Fig. 5 will show that the selvage warp threads are spaced side of the loom so that the filling F whichby the pinching elements so that they cannot the filling can be laid become crossed or lie one over the other. The

fell 40 diverge somewhat as shown in Fig. 6 and the pinching elements have a slight lat 'eral movement relatively to selvage warps to take a fresh hold thereon. 1

From the foregoing it will be seen that I have provided a very simple mechanism for providing a slight amount of slackness in the filling at the time of beat-up, this slackness overcoming any tendency on the part of a tensioned filling thread to draw in the warp selvages and crowd the same together so tightly that they resist impregnation by a rubberizing compound. It will further be seen that I have provlded means for defining an auxiliary shed the lines of which intersect at a point slightly behind the fell of the cloth so that the filling when being drawn in the shed has a small portion thereof extending substantially parallel to the warp before being drawn transversely of the fabric and in the shed. It will also be seen that means is provided for relieving pressure be tween the pinching elements and the warp threads so that the latter are not subjected to undesirable abrasion.

Having thus 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 spirit and scope of the invention and I do not wish to be limited to the details herein disclosed, but what I claim is:

1. In a loom having main and selvage warp threads connected to the fell of the cloth, the main warp threads forming a main shed extending forwardly to the fell of the cloth, said loom having also a lay to beat the filling into the fell of the cloth, a pair of elements, one above and one below the warp threads and normally held in contact with the top and bottom, respectively, of certain of the selvage warp threads to form an auxiliary shed located behind the main shed of the warp threads, means to move said elements forwardly as the fell is beaten into the cloth, and means to separate said elements as the same move forwardly, said means including a pivoted lever on which oneof the elements is mounted, and a fixed member to engage the lever.

2. In a loom having main and selvage warp threads connected to the fell of the cloth, the main warp threads forming a main shed extending forwardly to the fell of the cloth, said loom having also a lay to beat the filling into the fell of the cloth, a pair of elements, one above and one below the warp threads and normally held in contact with the top and bottom, respectively, of-certain of the selvage warp threads to form an auxiliary shed located behind the main shed of the warp threads, means to move said elements forwardly as the fell is beaten into the cloth,

and means to separate said elements as the same move forwardly, said means including a pivoted lever on which one of the elements is mounted, and a fixed member to engage the lever, said member comprising an eccentric movable about a fixed center.

3. In a loom having selvage warp threads connected to the fell oftlie cloth and having also a lay movable toward the fell of the cloth to beat in the filling, a supporting member yieldingly held in rear position, a pair of selvage warp thread pinching elements supported by and movable forwardly with the member, a lever pivoted to said member and supporting one of the elements, said lever having an inclined surface, a fixed operating device to engage the inclined partof the lever, and means to move said elements and member forwardly as the lay beats the filling of the cloth, the inclined part of the lever and the operating member co-operating during the forward movement of said elements to separate the latter.

4. In a loom having selvage warp threads connected to the fell of the cloth and having also a lay movable toward the fell of the cloth to beat in the filling, a yieldable carrier held normally in rearward position, a pair of selvage warp thread pinching elements one of which is secured directly to the carrier, a lever pivoted to the carrierand supporting the other element, said elements normally engaging eertain of the selvage warp threads at a point behind the fell of the cloth to form an auxiliary shed with certain selvage w'arp threads, said lever having an inclined forwardly extending portion, an eccentric 'collar angularly adjustable about a fixed center, and means engaged by the lay as the latter moves forwardly to move said carrier, elements and lever forwardly, the inclined portion of the lever engaging said eccentric collar to separate the elements as the same move forwardly.

5. In a loom having selvage warp threads and a lay movable toward the fell of the cloth to beat in the filling; a yieldable supporting member, an auxiliary shed forming element rigid with and moving with the member, a second auxiliary shed forming element pivotally mounted on the member, a fixed device to cooperate with the second named element to. cause movement of the same away from the first named element as the yielding element moves forwardly, and a device rigid with the member and first named element to be engaged by the lay as the latter advances,

the second'named element being out of the path of the lay.

6. In a loom having selvage warp threads and a lay movable toward the fell of the cloth to beat in the filling, a slidable supporting member, a selvage warp thread engaging element rigid with and supported by the member, means fast with respect to the member to engage the lay to move the member forwardly as the lay advances, a lever pivoted to the member and having a second selvage thread engaging element, means defining a pivotal connection between the lever and the member,

and a fixed device to engage the lever and cause movement of the latter about the pivot therefor as the member is moved forwardly,

RICHARD G. TURNER.

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