US1357969A - Shuttle - Google Patents

Description

M. P. DU PRAY.

SHUTTLE.

I APPLICATION FILED MAR. 27, I918- 1,357,969. I Patented Nov. 9, 1920.

5 SHEETS-SHEET l.

M. P. DU PRAY.

SHUTTLE.

APPLICATION FILED MAR. 27. 1918.

1,357,969. Patented Nov. 9, 1920.

5 SHEETSSHEET 2.

M. P. DU PRAY- SHUTTLE.

APPLICATION FILED MAR. 27. 1918.

Patented Nov. 9, 1920.

5 SHEETS-SHEET 3- Q, My)

M. P. DU PRAY.

Patented N 0v..9, 1920. 5 SHEETS-SHEET 4- Ii-Ii M. P. DU PRAY.

SHUTTLE.

APPLICATION FILED MAR. 27. 1918.

1 357 9 9 Patented Nov. 9, 1920.

5 SHEETS-SHEET 5.

MAGLOIS P. DU PRAY, F TREN'ION, NEW JERSEY.

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Specification of Letters Patent.

Application filed March 27, 1915. Serial No. 224,986.

To all whom it may concern:

Be it known that I, MAoLors P. DU PRAY, a citizen of the United States, residin at Trenton, in the county of Mercer and tate of New Jersey, have invented certain new and useful Improvements in Shuttles, of

which the following is a specification.

This invention relates to shuttles and particularly to shuttles for circular looms; and it comprises certain improvements in the bobbin holding mechanism, in the thread tensioning devices, and in the layer.

in my copending application Serial No. 72,152,, filed Jan. 14:, 1916, I have described and claimed certainprocesses of weaving multiply tubular fabric and apparatus therefore which comprises preliminarily weaving one ply around a weaving surface, advancing one ply to another weaving surface and weaving a second ply upon the first ply, and apparatus comprising a mechanism for weaving the plurality of plies as stated and for advancing. one ply from one weaving surface to anot er weaving surface and for withdrawing the woven fabric from the loom. In the said copending application I described shuttles, the details generally and specifically of Which are the subject of this application.

In the circular loom to which reference has been made advantageously there are a plurality of sets of shuttles located at dif ferent levels, (when two such sets are used) one set traveling in one direction while the other set travels in the reverse direction, and while the shuttles are of substantially the same construction, one is inverted with respect to the other, primarily for convenience in loading bobbins.

In the accompanying drawingsshowlng a specific embodiment of my invention, h t

Figure 1 is an elevation of the lower tle partly broken away to show details;

Fig. 2 is a detail elevation of one shuttle to show the method of inserting the bobb1n;

Fig. 3 is an elevation of the upper shuttles, parts being broken away to show details of the drive; 4

Fig. 4c is a detail cross section through one halfrof the loom showing theweaving pm 111 elevation;

Fig. 5 is a cross section of one of the shuttles along line VV of Fig. 11,- showing the bobbin in section;

Fig. 6 is a cross section of the shuttle along line Vlof Fig. 11;

, Fig. 7 is a cross section of the shuttle along line VII of Fig. 11; showing an end View of the bobbin holder opening arm;

Fig. 8 is a cross section of one of the ball bearlng shuttle spreadersupports;

F 1g. 9 is a horizontal section through the center of the loom taken above both sets of shuttles showing the upper and lower shuttle and their relative positions respecting the changlng of shed and showing the direction of rotation;

Fig. 10 is a cross section of one of the weft thread tension equalizers; and 1 Fig. 11 is an enlarged sectional plan View through the center of the loom showing one of the lower shuttles. v

Referring to the drawings, the standards 1 of the machine support a plurality of shuttle guides or raceway annular frames 3, 4c, 5 and 6 in which the shuttles travel over conical tracks 7. The brackets 8 of each shuttle carryball bearing traction wheels 9 wh1ch comprise outer flanged ball raceways lOprovided with an inwardly disposed stem or bolt 11 and threaded portion 12 for clamping to the bracket 8 by nut 13. Each traction wheel also is provided with an inner flange ball raceway 14: which is threaded to feed the stem 11 and which acts as a locknut. This raceway may be adjustably clamped to take up all lost motion in the free bearing rings or treads 15 and 16 bear ing on the tapering shuttle'guide tracks. Lost motion can be taken up by releasing nut 13 and turning stem 11 in raceway 14 by the hexagon socket 17, thus drawing rings 15 and 16 together.

Advantageously felt or other washer 18 is placed between the halves of the wheels and packing 19 may be employed to prevent grease WOI'klIlg out and the lint from the threads working in. In shuttles as heretofore made there are no successful expedients for taking up lost motion, and since the shuttles must travel ata considerable rate there is always more or less wear. Accord, ing to my invention I provide the above described wear compensating device with a result that ultimately there is less wear on the tracks and on the wheels because as slight wearoccurs the parts may be adjusted and the knocking which results in augmenting the wear eliminated. The parallel sliding relation of the conical rings to the tracks is such that all chattering and attendant noises are eliminated.

Patented Nov'.9,1l920.

35 ward extension 31., of which serves as a part other spools, cops'or other forms of spindle. 7 Each shuttle is provided with a frame or.

web 20 upon which is mounted the rack 21 adapted to mesh with driving pinions 22, the rack and the pinions being cut spirally to eliminate some of the noises prevalent where strai ht cut teeth are used. On the upper set of shuttles the racks are engaged on the outside by the pinions and on the lower set they are engagedon the inside by the pinions in order that the shuttles may be driven in opposite directions, upper and lower pinions for driving the sameshuttles being operated by the same shafts.

The shuttles comprise nose pieces 23 which arein effect continuations of the shuttle body, but this body is made up of a plurality of sections as hereinafter described. In each shuttle, mounted upon the bracket 8 which carries the wheels 9, is the sleeve 24 slotted at 25 and carrying the cone center 26 provided with pin 27 projecting through the slot. The cone center is normally spring pressed forwardly or out of the sleeve by means of the spring 28. *Pivotedupon the sleeve at 29 is a lever or arm 30, the forof the shuttle frame when in normal position. This arm is provided-I with a cam face 32 which is adapted to ride against the pin 27 to force it rearwardly and thus to draw the cone center in the sleeve when the arm is elevated (Fig. 2). At the extremity of the cam 32 is a notch 33 which fits the pin 27, the engagement serving to yieldingly hold the lever or arm in elevated position and the cone 26 in retracted position. The lower extremity of the arm or lever is provided with a depending portion of leg 34 which is adapted to engage the knee piece 35 slidably connected to the bottom portion of the shuttle frame. The knee piece is in' engagement with a slide 36 which in turn is in engagement with a cup 37-and right hand cone center 38. Elevation of the lever 31 forces the leg 34 toward the right and thus into engagement with the knee piece 35 which forces the slide 36 toward the right and this slide in turn forces the cup 37 and the cone center toward the right. The lever spreads the two cone centers apart and permits the insertion and removal of a bobbin E.

The cup' 37 surrounds the cone center 38 and is spring pressed toward the opposite cone center by means of the spring 39. As

memes the bobbin unwinds the cup is gradually.

forced toward the left, and due to its curved shape it constantly engages the periphery of the bobbin and serves to create a constant drag upon it.

Mounted upon the frame of the shuttle is a conical tension spindle 40 over whichthe weft thread coming from the bobbin passes. This spindle (shown in detail in Fig. 10) is held free to revolve on adjustable post 41 mounted in arm 42 fulcrumed on the ear 43 integral with the shuttle frame. Leather washer 44 is interposed between the'arm 42 and spindle 40 against which the spindle rotates. The arm 42 is provided with a spring equalizer connection 45 coupled. at 46 on arm 42, and having its other end guided in socket 47 swiveled at 48 on the frame of the shuttle. Spring 45 interposed between the arm 42 and socket 47 imparts a downward movement to the spindle 40 when the thread in unwinding travels from one end of the bobbin to the other, thus centralizing the thread and equalizing the lengthening and weft thread passes from the bobbin over the spindle 40, and is preferably looped over it a number of times, thence over the sheave wheel .49 towthe conical grooved tension wheels 50 and 51; and such thread may be passed back and forth'over these latter two Wheels until the proper tension is obtained. Tension wheels 50 and 51 are freely mounted on studs 52 and 53 on an arm 54 of the frame and the'surface ofthe wheel is pressed. against friction washers 55 by springs adjustable by nuts 57. From the tension wheels 50 and 51 the weft. or filling thread from the bobbin passes through guide or eye 58 and alternately under and over spring tension fingers 59 and then over wheel 60 throughthe e e 61 of the layer. The layer 62 is prefera ly .a rigid bar adjustably secured near the nose of the shuttle by means of the bolt 63 and slot connection 64. It is spring pressed at itsextremity against the fabric and toward the weaving pin by means of the compensating arm. This arm comprises a bolt'65 pivoted at 66 to an ear 67 preferably integral with that end of the layer. The bolt is adjustable in a socket 68 by means of a nut 69 and held in place by lock nut 70'. The socket 68 rides in the sleeve 71 and is spring pressed toward the weaving pin by means of the spring 72 having one end bearing against the shoulder portion 73 of the socket and the other end against the face 74 of the cup 75 which is attached to the loom frame by means of the inaneea siderable vibration in the shuttle and even though there may ultimately be some wear in the working parts. I

To assist in alining the layer and shuttle and to equalize the weight of the same or to balance the shuttle for the, purpose of taking off some of the stress from the traction wheels, I provide additional traction wheels 78 for the layer-located near the weaving pin. In actual use I provide six of these. wheels spaced equally around the weaving pin and thus the layer arm will always have a bearing on two or more of these wheels. The layer will tend to pack the weft thread as it rotates around the weaving pin and is firmly but yieldably held against the threads by means of these wheels 78. These wheels are pivoted at 79 and have a'shelf 80 projecting from the arm 81. A coil spring 82 which serves to yieldingly hold the layer in proximity with the weaving pin is located between this shelf and the loom frame.

The traction wheels 78 are preferably conical in sha, e and are rotatably mounted upon the shafts 83 having the ball bearings 84 and 85 (in Fig. 8). -The weaving pin is shown at 86. The weftthreads are indicated by the reference letter A while the warp threads are indicated by the reference letter B. The warp threads are operated by the heddles 87 and 88 shown diagrammatically in Figs. 4 and 9, but thoroughly described in the copending application hereinbefore referred to. When the shed is properly made the shuttles pass through the shed,

' feed the weft thread to the layer which in turn packs it in position between the warp iii) ' substantially the same in construction.

threads against the weaving pin, whereupon the shed is crossed and the operation is repeated.

In describing the detail parts ll have stated their functions and it is therefore not necessary to give the operation of the shuttle. While the shuttle is particularly advantageous in connection with circular looms described and claimed in my said copending application it is susceptible of use in other looms and is not to be considered as limited to use in the relations shown. The 11 per The different features of the upper shuttles are the internal racks on one shuttle frame and the external racks on the other to permit rotation in the opposite direction; and one shuttle is inverted with relation to the other. Since the warp threads pass over the shuttle frame they must be removed in order to insert a bobbin. The operator in inserting a bobbin in the upper shuttle can operate from the upper side, the upper shuttle arm 31 opens upwardly and carries with it the warp threads which lie across it, while the lower shuttle arm opens downwardly as shown in dotted lines in li'ig. 8.

shuttle and the lower shuttle are ll have necessarily shown certain details of the loom in combination with these shut- .a nose at one end and carrying oppositely disposed spool-holding members, a spool of thread carried thereby, and means for simultaneously releasing said spool holding members from engagement with the spool.

2. In a loom, shuttle mechanism comprising a loom carriage, a shuttle carried thereby,'said shuttle comprising a frame having a nose at one end and carrying oppositely disposed spool-holding members, a spool of thread carried thereby, one of said spool holding members being yieldingly carried by said frame and adapted to embrace the periphery of said spool and to exert a substantially constant pressure on said spool as it decreases in diameter due to the unwinding of the thread therefrom.

3. A shuttle comprising a frame, oppositely disposed spool-holding members carried thereby, said members provided with means for engaging opposite ends of a spool of thread, one said means provided with mechanism for withdrawing it from theend of the spool of thread with which it is in engagement and connections between said last mentioned means for the other spool en'- gaging means for simultaneously withdrawing the last mentioned spool engaging means.

a. in a shuttle, oppositely disposed bobbin centers and brackets therefor, means for spreading said centers apart comprising a main arm pivotally attached to one bracket and having a cam surface, a pin carried by one center, adapted to be engaged by said surface, an auxiliary arm carried by the main arm, a slidable knee piece carried by said shuttle connections between said knee piece and the other center, whereby movement of the arm will cause retraction of the first said center through engagement of the said cam and said pin and retraction of the second said center through engagement of said auxiliary arm and said knee piece, and means tending normally to yieldingly force said centers toward each other to engage opposite ends of a spool.

A shuttle, comprising in combination 6. A shuttle, comprising in combination with a shuttle body and bobbin, oppositely its projecting centers mounted in said body. means normally pushing said centers for- Wardly into operative contact with the bobbin, and means for simultaneously retracting said centers.

7. A shuttle, comprisingin combination:

with a shuttle body, oppositely projecting centers mounted in said body, a bobbin positioning cup surrounding one of said centers, a retracting device. operative on the other center, and means interposed between said retracting device and said other center and ts associatedpositioning, cup for retractmg the latter simultaneously with the first center.

8. In a loom shuttle, comprising in combina tlon with a shuttlebody, oppositely projecting centers slidably mounted in said body,

spring meansnormally pushing said centers.

toward one another, a cam lever mounted ad acent one of said centers and operative thereon to retract the pin as the cam lever operative on both of said centers to simultaneously retract the latter, and means carried by said cam lever for closing the shuttle, said shuttle closing means also acting as a warp'thread liftingv device when the shuttle is opened. 4

10. A shuttle comprising in combination with a body, oppositely projecting centers in said body, and means operative on both of said centers for retracting the'latter, said retracting means also constituting a shuttle closing device and serving to lift the warp threads away from said shuttle when the latter is opened.

11. A shuttle, comprising in combination with a shuttle body, oppositely projecting centers mounted in opposite e ds of said shuttle body, spring-means no ally pushing said centers toward one another, a cam lever mounted in the shuttle body and hav ing a cam surface operative against one 0f said centers to retract the latter, a sllde connected to the opposite center and an element carried bysaid cam lever for engaging said slide to retract the opposite center simultaneously with the first center, and a shuttle closing arm carried. by said cam I lever, said cam lever retracting said centers when said closing arm is moved into opening' position. J

12. A shuttle, comprising in combination with a shuttle body, oppositely projecting centers mounted in said body, means for pushing said centers toward one another,

memes means for retracting said centers, and a positioning cup surrounding one of said centers, said positionin cup being constructed to engage the perip eral portion of a bobbin, and moving with it respective center to exert a diminishing p essure on the bobbin as the diameter of the later decreases.

13. In a shuttle mechanism, the combination with a shuttle and a bobbin, of a regulating device for centralizing the feed of the thread from the bobbin and equalizing its tension, said regulating device consisting of a revoluble spindle positioned opposite the bobbin to receive the slack of the thread from the latter, a post carrying said spindle, and a spring equalizer operating between said post and the shuttle in position to permit the spindle to yield with thepull of the thread.

14:. The combination with a shuttle mechanism, of a shuttle and a bobbin, and a device for centralizing the feed of the thread delivered from said bobbin and equalizing the tension thereof, said device consisting of a conical spindle, a post fulcrumed on said shuttle andrevolubly supporting sald spindle, and a spring connectlon between .said post and said shuttle t0..permit said spindle to yield under the pull of p the thread.

15. lin a shuttle mechanism, a shuttle frame, shuttles carried by said shuttle frame, a layer associated with each shuttle, and a I at yielding compensating device connected to each layer and bearing there-against with a radial pressure to pack the weft thread.

16. In a shuttle mechanism, a shuttle frame, shuttles carried by said shuttle frame, a layer associated with each of said; shuttles, and a yielding compensatlng device bearing between each layer and the shuttle frame in a radial direction to cause the layer to pack the weft thread with a uniform pressure. I

.17. Ina shuttle mechanism, a shuttle frame, shuttles carried by said frame, a layer associated with each shuttle, and a cushioned compensating device mounted between each layer and the shuttle frame to exert a uniform pressure upon the layers.

18. The combination with a shuttle frame and a weft layer carried thereby, of a cushioned compensating device interposed between said layer and said shuttle frame for eliminating the vibration of the layer.

19. The combination with a shuttle frame and a weft layer, of a'compensating device interposed between said layer and said shuttle frame, said compensating device consisting of telescoped elements and a spring member normally pushing said telescoped "elements aparts,'whereby vibration of the layer is avoided.

20. The combination with a shuttle framei and a layer carried thereby, of a compeniea'aece sating device interposed between said frame, said compensating device consisting of a member connected to said layer, a second member connected to said shuttle frame, and an expansion spring interposed between said members .to push said layer, and said shuttle frame apart.

21. In a shuttle mechanism, the combination with a shuttle frame, of a shuttle, a layer, a raceway for the shuttle frame, a support for the layer, a thread feed equalizer mounted opposite the shuttle, thread tension rollers interposed between said equalizer and the layer, thread tensioning fingers carried by the layer, and a yielding compensating device located between the frame and the layer to eliminate vibration of the layer.

22. In a shuttle mechanism, the combination with a shuttle frame, of a shuttle carried by said frame, a layer also carried by said frame, a resiliently mounted thread feed equalizer mounted opposite said shuttle, guide and tension rollers carried by said in said raceways, tread rings adapted to re-' volve on said bearings and means for ad-' justing the raceways' and thus the tread rings to compensate for wear.

25. Traction wheels for shuttle carriages for looms comprising oppositely disposed flanged r'aceways, oppositely disposed flanged tread rings mounted 1n said raceways, bearings between the racewa s and the tread, a bolt connecting the said anged raceways together and to the said carriage and a nut for adjusting the bolt.

26. In a loom shuttle mechanism comprise ing a carriage having a frame, traction ,Wheels secured to said frame, said Wheels comprising complementary tread portlons adjustable with respect to each other.

27. Ina loom shuttle mechanism comprising a carriage having a frame, traction wheels and means secur'ng them to said frame,-said wheels comp ising complementary tread portions adjustable with respect to each other through the means securing them to the frame.

28.. A'traction wheel for a shuttle carriage comprising complementary tread portions, a washer between said tread portions and means for adjusting said tread portions with respect to each other. 1

29. A shuttle, comprising in combination with a shuttle body, oppositely projecting centers slidably mounted in said body, means for normally pushing said centers toward each other, and means for simultaneously retracting said centers and normally forming a part of the body of the shuttle for inclosing the bobbin.

30. A shuttle, comprising in combination with a shuttle body and bobbin, oppositely projecting centers mounted in said body,

means for normally pushin toward each, other, and a pivoted member for simultaneously retracting said centers said centers and normallyforming a part of the shuttle closing the opening'through which the bobbin is inserted in the shuttle.

31. A'shuttle, comprising in combination with a shuttle body, oppositely projecting centers slida'blymounted in said body, spring means normally holding the centers inwardly toward each other, a cam lever pivoted adjacent one of said centers and operative thereon to'retract the same when the lever is moved, said lever adapted to form closing means for theo ening in the shuttle through which the bob in is passed in the insertion thereof, and means connected to the said center for operating the other center whereby the centers are simultaneously retracted.

In testimony whereof, I afiix my signature hereto.

MAGLOIS I. DU PRAY.

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