US2172335A - Antiturning bobbin for automatic looms - Google Patents

Description

Sept. 5, 1939. R. G. TURNER 2,172,335

ANTITURNI NG BOBBIN FOR AUTOMATIC LOOKS Filed March 3, 1938 Richard Gr. Tmnex' Patented Sept. 5, 1939 2,172,335 ANTITURNING BOBBIN FOR AUTOMATIC LOOMS Richard G. Turner, Worcester, Mass, assignor to Crompton & Knowles Loom Works, Worcester, Mass, a corporation of Massachusetts Application March 3, 1938, Serial No. 193,748 7 Claims. (Cl. 242120) This invention relates to improvements in end of the bobbin with the rings and portion of bobbins for automatic weft replemshing looms the wood shown in section, and more particularly to bob ins on which is Fig. 3 is a vertical section on line 33 of Fig. wound a flat or oval package of Weft, and also to the method of making such a bobbi Fig. 4 is a detail view showing the pin and the 5 n my co-pending application Serial No. relation which it sustains to the ring which 129,245, now U. S. Patent 2,128 974, I have shown holds it in place, a magazine for supplying reserve bobbins the Fig. 5 shows the bobbin shuttle and transfer horizontal transverse barrel diameter of which is mechanism in position these parts sustain at the greater than the vertical dimension. It is necesbeginning of the transferring operation, 10 sary that such bobbins be held in the shuttle so Figs. 6, 7 and 8 are diagrammatic views showthat they will not turn on their longitudinal axis. ing the method of assembling the rings and I nave found that a bobbin of this type provided holding pin, and with the ordinary circular ring has a tendency Fig. 9 is a. view similar to Fig. 3 but showing a to rotate in the shuttle with the result that the modified form with two pins. 15 ma or transverse axis of the weft becomes oblique The shuttle S has the usual bobbin compartand projects below the bottom of the shuttle. ment In to receive a bobbin B, the barrel H of uttles used on automatic looms ordinarily which may be non-circular preferably in the form have a two-Jaw spring holder notched to receive of an oval or oblong with the major dimension the rings of the bobbin There are ribs on the horizontal when the shuttle is weaving The 20 inner vertical surfaces of the spring Jaws loshuttle is provided with a spring clip l2 having cated between the notches It is an important obfront and back aws l3 and M respectively, which ect of my present invention to provide the bobhave a plurality of vertical notches l5 spaced by bin with pro ections located between the rings ribs I6. to engage the ribs of the spring aws and there- The bobbin B has a head or butt 20 substan- 25 by resist rotation of the bobbin in the shuttle tially of usual form and provided with outer and It is a further obJect of my present inveninner wire rings 2| and 22, respectively, between tion to extend a holding pin transversely through which is located an intermediate similar ring 23. the bobbin head to proJect beyond opposite sides These rings are made of hardened wire and are of the latter sufiiciently to engage the spring jaw received by grooves 24 in the bobbin head. The 30 ribs and to hold this pin in place by a ring on the rings enter the grooves I 5 corresponding thereto bobbin head Changing conditions of the atand it is in this way that the bobbin is yieldmosphere and drying of the wood of the bobbin ingly held in the shuttle. are likely to loosen the pin and for this reason I The matter thus far described, except as modimake provision for holding the pin in proper pofied by the following description, may be of the 35 sition. usual construction.

It is a more particular object of my present In carrying my invention into effect I provide a invention to taper the ends of the holding pin pin 30 having a cylindrical intermediate porand locate the same so that one of the bobbin tion 3| with its ends tapered as at 32 The length o head rings engages the tapered surfaces to lock of the pin 18 sufficient to pro ect beyond the the pin in position. periphery of the head as suggested in Fig. 3 The It is a further object of my invention to propin is located in a bore 33 extending transveisely vide an improved method for assembling the through the head and as indicated in Fig 3 lorings and pin so that these parts necessarily have cated above the winding spindle bore 34. The

5 cooperating engagement with each other location of the bore 33 is an important part of With these and other obJects in view which my present invention and as shown in Fig. 4 will appear as the description proceeds, my invenis positioned so that one edge 35 thereof if proon resides in the combination and arrangement Jected would clear the intermediate rings, but of parts hereinafter described and set forth. the other edge 36 if projected would extend into i In the accompanying drawing, wherein two the outer groove 24 which receives the outermost forms of my invention are set forth, ring 2!. The pin may be formed of hardened Fig. 1 is a top plan view of a shuttle carrying wire and the conical ends formed in any desired a bobbin made according to the preferred form of manner my present invention, When assembling the rings and pin rings 22 Fig. 2 is an enlarged plan view of the butt and 23 will be slipped into position over a conical guide not as is customary to enter the inner and intermediate grooves 24, respectively, as indicated in Fig. 6. The pin 30 is then inserted through the bore 33 with its ends projecting approximately the same amount in the opposite ends of said bore, as shown in Fig. '7. The outermost ring 2! is then placed into its groove to establish holding relation with the tapered ends of the pin to prevent longitudinal movement of the latter along its axis relatively to the bobbin head, as suggested in Fig. 8. The bobbin is then ready for use in a weft replenishing mechanism designed to hold the bobbin with the pin horizontal during transfer, or at least to present the bobbin for transfer in such a position that at the end of the transferring stroke the pin will be horizontal. As shown in Fig. 3 the pin is substantially parallel to the major transverse diameter of the barrel ll. 7

The rings have their ends spaced slightly from each other as suggested in Fig. 1. In that figure shown a gap 41! between the ends of each ring, and I have shown the gaps aligned, but this is not essential. however, that a bobbin made with its rings so placed gives continuous uninterrupted contact between the jaws of the shuttle spring and the bobbin rings. It is desirable, however, that the outermost ring 2i be located with its gap 40 spaced from both ends of the pin. If this were not so the pin might be able to move in one direction through the gap 40 of ring 2!. I may if desired use a form of ring shown in my co-pending application Serial No. 117,704, the spring having roughened areas the wood of the bobbin to prevent turning of the ring on the bobbin head. By this provision the ring is held against creeping angular motion around the periphery of the bobbin and the gap 48 of the outermost ring 2| is therefore effectively prevented from moving into alignment with the pin. The latter is therefore held between parts of the outer ring 2| at all times.

During transfer the bobbin will be approximately as indicated in Fig. 5 when the transferrer arm 55 is located above a bobbin support 56 which holds the bobbin in proper position for transfer. The bobbin head may be slabbed as at 51 to assist in holding the bobbin with the pin horizontal preparatory to transfer. This support is substantially parallel to the pin 30 and during downward motion of the bobbin into the shuttle 5 one end or the other of the pin will engage a rib l6 and will thereafter prevent further substantial downward motion of the corresponding side of the bobbin head. As transfer continues the other end of the pin will move down toward the rib l6 opposite the f rst rib to be engaged by the pin. During subsequent picking of the shuttle any tendency of the bobbin to turn in the shuttle jaws will be resisted by engagement between the jaw ribs and the pin. In this connection it should be noted that the pin passes through the wooden part of the bobbin so that although rings 22 and 23 may turn with respect to the bobbin, the latter will nevertheless be maintained with the major transverse barrel diameter thereof substantially horizontal.

In the modified form of the invention shown in Fig. 9 I illustrate two pins 15 each similar to the pin 36 and held by the samering. Each pin 15 serves the same purpose as 'does pin 30, the use of two pins giving added assurance that the bobbin will not turn.

From the foregoing it will be seen thatI have horizontal diameter of which is provided a bobbin having a head from which pro-. ject elements to engage the spring jaws of the shuttle the bobbin in the shuttle. It will also cated at such a point along the axis of the bobbin that its tapered ends are engaged by one of the bobbin rings to prevent dislodgement of the pin. shown the pin locked in position by the outermost ring, yet I do not wish to be limited to this construction, but during transfer if the shuttle is slightly misplaced toward the center of the loom a condition might arise where the outermost ring only will be held by the spring jaws. It is for this reason that I prefer to have the ring nearest the head end of the bobbin hold the pin. Furthermore, I make provision for preventing turning of the ring 2i so that a solid part thereof will engage the tapered ends of the pin, this provision precluding the possibility of the gap between the ends of the ring ever becoming aligned with the pin. Again, it will be seen from Fig. 5 that the support for the bobbin as it awaits transfer has a surface substantially parallel to the pin and any adjustment which may be necessary in the angular disposition of the support surface to effect proper transfer. will therefore automatically locate the pin correctly.

Having 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 bobbin, a head on. one endof the bobbin, a holding ring on said head, a pin extending transversely through the head and having tapered ends projecting beyond the periphery of said head, said ring engaging the tapered ends of the pin to prevent the latter from moving transversely relatively to the head.

2. In a bobbin having a barrel the transverse greater than the transverse vertical diameter, a head on one end of the bobbin, a holding ring; on said head, and a horizontal diameter and projecting beyond the periphery of the head, said ring having holding relation with the opposite ends of the pin to prevent substantial relative transverse motion thereof with respect to the head.

3. In a bobbin having a barrel the transverse horizontal diameter of which is greater than the transverse vertical diameter, a head on one end of the bobbin, a holding ring on 7 parallel to said tapered ends extending transversely through the head,'said tapered ends projecting beyond the periphery of the head and into engagement with the ring, whereby the latter prevents substantial transverse motion of the pin relatively to the head.

4. In a bobbin, a head on one end of the barrel, a holding ring located between the ends of and extending around said head and having the ends thereof separated by a gap, means to prevent rotation of the ring on the bobbin, and a pin extending transversely of the barrel and through the head and having the ends thereof in engagement with the ring at points spaced from said gap, said ring holding the pin against transverse motion relatively to the head.

5. In a bobbin, 2. head on one end of the barrel, a ring extending around said head and having the ends thereof separated by a gap, means g transversely through the head par- F said head, a pin 7 horizontal diameter and having formed on the ring to engage the head and preventing substantial transverse movement of the vent rotation of the ring on said head, and a pin pin relatively to the head.

periphery of the head and into holding engagepin extending beyond the periphery of the head. ment with the second named ring, the latter pre- RIC ARD G. TURNER.

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