US2142524A - Adjustment locking means for loom shuttle tensions - Google Patents

Description

Jan. 3, 1939. .1. A MURPHY 2,142,524

ADJUSTMENT LOCKING MEANS FOR LOOM SHUTTLE TENSIONS Filed MaFGh 8, 19.38 2 Sheets-Shag?, l

2J IIA/15s A. URP/YY INVENTOR ATTORNEY Jan. 3,'.1939- J. A. MURPHY I 2,142,524

ADJUSTMENT LOCKING MEANS FOR LOOM SHUTTLE TENSIONS Filed March a,- 1938 2 Sheets-Sheet 2 JAMES A. MURPHY NVE/vzw? ATTORNEY Patented Jan. 3, 1939 UNITE@ .STATES ENT OFFiCE ADJUSTMENT LOCKNG MEAN S FOR LOOM SHUTTLE TENSINS Application March 8, 1938, Serial No. 194,529

4 Claims.

This invention relates to an improved adjustment locking means for loom shuttle tensions, which is more particularly adapted for use in connection with loom shuttles having thread tensioning plates located opposed relation each other and provided with adjustable tensioning means for applying diierent degrees of tension to a thread passed between the thread tensioning plates.

One object of the invention is the provision in a loom shuttle of means for locking the tension regulating means in such a manner as to insure a substantially constant tension on the thread as it passes through the thread block trom the bobbin.

Another object oi the invention is the provision of removable and replaceable locking means adapted for use in locking one or more oi the tension adjusting members of a loom shuttle against movement after the same have been set to obtain the desired tension on the thread, in order that the tension applied to the thread may remain constant for the particular fabric being made and until such time as it becomes nece y to readjust the tension for dierent conc..J .ns ci" use.

Other objects and advantages of the invention relate to various improved details or" construction and novel arrangements of the parts as will be more fully set forth in the detailed description to follow.

Referring to the drawings:

Fig. l is a side elevational View of a portion of the thread delivery end loom shuttle, showing the position of a locking member as applied to a tension adjusting membe- Fig. 2 is a top plan View ci the `Ll'iread delivery end of the loom shuttle, partially in section, the section being taken substantially along the line 2--2 of Fig. l, and showing the thread block, thread tensioning members and associated elements with the locking member in operative position relative to the adjusting member,

Fig. 3 is a rear elevational view of a thread block, showing the thread tensioning members and illustrating a somewhat modified form of adjusting member locking means,

Fig. 4 is a horizontal section View taken substantially along the line i-fl of Fig. 5, and showing the position oi the locking members or keys with respect to the tensioning adjusting members,

Fig. 5 is a side elevational view ci the thread block and adjusting member locking means shown in Fig. 3,

Fig. 6 is a side elevational View of a thread block showing another modied form of adjusting member locking means and illustrating the position of the same in connection with the adjusting member.

Fig. 7 is a Vertical sectional view through the thread blc-ck shown in Fig. 6, taken substantially along the line li-l of Fig. 6 and showing the position o1 the locking member and its relation to the parts when the adjusting members are in locked position,

Fig. 8 is a side elevational view of the locking member shown in Figs. l and 2,

9 is a side elevational view of the locking member as shown in Figs. 3, 4 and 5, and,

Fig. l0 is a perspective View of the locking member shown in Figs. 6 and '7.

In the use or" thread tensioning means for loom shuttles involving opposed thread tensioning members located upon opposite sides of the thread as it passes from the bobbin through the thread block it is necessary to provide resilient means of some character acting upon one or both of the oppositely positioned thread tensioning members to urge them resiliently towards each other and into Contact with opposite sides ofthe thread. It is desirable that such resilient means be capable of adjustment to permit changing of the pressure applied to the thread tensioning members with dierence in the size and character of the thread employed and other conditions or use, while at the same time it is desirable that such pressure be maintained substantially constant over considerable periods, as when the loom shuttle is being used with one type and size of thread and for making the same character of material. One or more adjusting members or screws may be employed for the purpose and positioned to act upon the resilient means used to increase or decrease the applied tension as the character of the thread or the type of material being made renders necessary or desirable. In the use of such devices, however, there is a tendency for the adjusting means to change position during continued operation of the shuttle and thus effect a variation in the applied tension. in order to overcome this tendency the present invention is directed to the provision of means for locking the adjusting means in such a manner as to hold the same. securely in place While at the same time permit movement of the adjusting means by the operative in order to change the tension when necessary to meet changed conditions of operation.

In the embodiment of the invention illustrated herein, l designates a loom shuttle having a bobbin receiving opening 2, and provided with a thread block 3 suitably positioned for receiving the thread from the bobbin. In the present construction the thread block 3 is provided with a thread passage 4 extending substantially longitudinally thereof, and thread tensioning plate members 5 are located in opposed relation with each other within the thread passage 4 and may be supported by a bar 6 extending transversely of the thread passage. Each thread tensioning member 5 may be provided with an outwardly extending lug 'I mounted in a suitable opening 8 formed in the thread block to maintain the same in the desired upright position while permitting movement of the plate members towards and from each other. A bolt 9 may extend transversely of the shuttle body and pass through the thread block 3 to retain the thread block securely in place within the shuttle body.

An adjusting member or screw I2 may be threaded in the thread block or shuttle body in laterally opposed thread tensioning plate members 5 and may be provided with a recessed end portion adapted to receive a coiled spring I4, which is supported by the adjusting screw in position to engage the outer face of one of the thread tensioning members 5 and urge the same resiliently towards the opposed thread tensioning member.

One of the thread tensioning members 5 may be mounted in relatively fixed position, in which case the opposite tensioning, member only is spring pressed to urge it into engaging position with the rst named thread tensioning member. In this case only one adjusting member may be employed and consequently only a single locking member. As shown herein, however, each thread tensioning member 5 is mounted for movement towards and from the other and each is adapted to be actuated by a resilient tensioning member controlled by an adjusting member. In such case it is desirable to employ a locking member for each adjusting member.

The adjusting member or members I2 may be threaded in the thread block or in a portion of the shuttle body for movement to adjust the degree of pressure applied to the thread tensioning member or members 5 by the spring I4, and each adjusting member I2 is provided with a slot or channel I5 formed in the outer end thereof by which it may be turned to secure the desired degrec of adjustment or to bring the channel I5 into alignment with a recess or channel in the thread block or shuttle body, which channel may then receive a key or locking member to lock the adjusting member against accidental movement and thereby prevent ch-ange in the tension applied by its controlled tension member.

In that form of the invention illustrated in Figs. l and 2 of the drawings, the adjusting members or screws are of suchlength as to project outwardly from the thread block sufliciently to bring the outer end portions thereof within the shuttle body. A groove I8 is cut in the outer face of the shuttle body and in position to extend transversely of and in proximity to the outer end portion of an adjusting member I2. A pin I@ is secured in the shuttle body to extend transversely of and spaced slightly from the bottom of the groove I8.

When the parts are located in assembled relation within the thread block the adjusting member 2 may be turned to give the tension desired to the tension spring I4, and then turned slightly, if necessary, to bring the channel I5 formed in the end thereof into alignment with relation with one of saidthe groove I8. A resilient key 20, having an angular end portion 2I, is then inserted within the groove I8 and beneath the pin I9 and forced forwardly to lie within the channel I5 of the adjusting member I2 and hold the same against rotation. When fully inserted within the slot IB, the offset end 2I of the locking key 20 is in position to enter a recess formed in the base of the slot I 8 and thus hold the key 20 iirmly against accidental removal.

In that form of the invention shown in Figs. 3, 4 and 5 of the drawings the general features of construction of the thread block, thread tensioning members and adjusting means therefor are similar in all respects to those previously de scribed, except that in this form of the invention a locking key or keys 22 are carried by the thread block instead of by the shuttle body, and the locking key itself is of amodified form. The adjusting members I 2 each has a similar channel I5 formed in its outer end, and an opening 24 is formed in the end of the thread block in regn istry with a recess 25 formed therein for the insertion or removal of a locking key 22 which is forced forwardly through the opening 24 in the end of the thread block and through the channel I5 in the end of the adjusting member I2 to bring its forward end portion in to a recess 25 formed in the thread block 3 whereby the locking member 22 is engaged at opposite ends thereof to press it against the adjusting member I2. A detent lug 23 may be formed in the locking key 22, adjacent to one end, which may engage a portion of the thread block when the locking key is in position therein and prevent its ac cidental displacement or removal from the thread block. In that form of the invention shown in Figs. 6 and '7 of the drawings the construction of the thread block, thread tensioning members and adjusting means therefor are similar to these previously described, and the adjusting members I2 are similarly threaded within the thread block to exert the desired degree of pressure upon the coil springs I4. In this form of the invention, however, the locking member or key is generally rectangular in outline when in position within the thread block as indicated at 26 and comprises a base 21 and arms 28 spaced from each other and extending in the same lateral direction from the base to t within a continuous groove 29 formed in the base and sides of the thread block 3, and so positioned as to intersect the outer ends of the adjusting members I2 and lie within the channels I5 formed therein to hold the adjusting members against movement when set in the desired position for tensioning the springs I4 and when the adjusting members are turned to position the channels vertically with respect to the base of the thread block. The locking member or key 26 may be readily removed from the thread block 3 whenever it is desired to change the posi tion of the adjusting members to vary the tension applied to the thread tensioning members 5.

In each form of the invention shown one or both of the thread tensioning members 5 may be engaged by a tensioning spring I4 carried by or controlled from an adjusting member I2, and the tension applied to the thread as it passes through the thread passages may be regulated or controlled by turning the adjusting member to increase or decrease the pressure exerted by the spring I4. When the pressure exerted upon the thread tensioning member or members by the spring I4 is properly adjusted, the adjusting member I2 may be turned slightly to bring the channel I5 thereof into alignment With a groove or recess formed in the shuttle body or thread block and a locking key is inserted to lie Within the groove or recess and the channel of the adjusting member and retain the adjusting member against rotation, whereby the pressure exerted by the spring or springs I4 remains constant. Each form of locking key is retained in its locking position during use of the shuttle, either by means engaging a portion of the shuttle body or thread block or by the location of the thread block in the shuttle body, and is removable readily to permit the position of the adjusting member to` be changed for changing the tension applied to the thread when necessary or desirable.

What I claim is:

1. In an adjustment locking means for loom shuttle tensions, the combination with a loom shuttle thread block provided with a thread passage and thread tensioning members located in opposed relation within the thread passage, means for applying tension to one of said thread tensioning members, an adjusting screw threaded in said thread block for adjusting said tension means and provided with a transverse channel formed in the outer end thereof, of a locking key slidably mounted in the thread block for movement longitudinally of the channel in the adjusting screw, and means for retaining said locking key in longitudinally adjusted position for engagement with the channeled end of said adjusting screw.

2. In a loom shuttle structure, a thread block provided with a thread passage and having thread tensioning members located in opposed relation with each other transversely of the thread passage, resilient means engaging one of said thread tensioning members, an adjusting member threaded in said thread block having a transverse recess and movable to adjust said resilient means, and an elongated locking member slidably mounted in said thread block and longitudinally slidable in a direction transversely of the axis of said adjusting member to engage the recess in said adjusting member and hold the same in adjusted position.

3. In a loom shuttle structure, a thread block having a thread passage formed therein, a thread tensioning member located within the thread passage, tension means engageable with said thread tensioning member, an adjusting member threaded in said thread block and engaging said tension means for regulating said tension means, said adjusting member having a transversely extending recess formed therein and communicating with a recess in the thread block extending transversely of the axis of said adjusting member in any one of several positions of said adjusting member, and an elongated locking member longitudinally slidable Within the recesses in the thread block and adjusting member in a direction transversely of said adjusting member when the recess of the adjusting member is in communication with the recess in the thread block to lock the adjusting member against movement in the thread block.

4. In a loom shuttle structure, thread tensioning members positioned for engagement With opposite sides of a thread, spring means for exerting pressure upon said thread tensioning members, a threaded adjusting member axially rotatable for controlling said spring means and provided with a transversely extending opening, a locking member carried by said shuttle and slidable longitudinally of its extent and transversely of the axis of said adjusting member toenter the transversely extending opening in said adjusting member and lock the same against rotation.

JAMES A. MURPHY.

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