US695566A - Warp-twisting machine. - Google Patents

Description

Patented Mari l8, I902.

W. E. KREY & A. DUPPLEB.

WARP TWISTJNG MACHINE.

(Application filed Apr. 16. 190L) 6 Sheets--8heet l.

I INVENTORS away/0 M ATTORNEYS mus PETERS cu, pkormumon \vm-oxmcu. o. p.

Patented Mar. [8, I902.

w'. E. KBEY'& A. DUPPLEB.

WARP TWlSTING MACHINE.

(Application filed. Apr. 16, 1901.)

(No Model.)

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No. 695,566. Pafohtod' Mar. l8, I902.

. w. E. KBEY a A. YDUPPLEBL WARP'TWISTIIIG MACHINE.

(A pplication filed. Apg. 16. 1901.) (No Model.) 6 Shasta-sheaf -3.

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Patented Mar. |a, I902.

W. E. KREY & A. DUPPLER.

WARP rwlsrmaulAcmiua.

(Application filed pr. 1 s, 1901.

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(N0 Model.)

WITNESSES 'INVENTOR ATTORNEYS.

PatentedMar. l8, l902 W. E. KBEY & A. DUPPLEB.

\ WARP TWISTING MACHINE.

(Applieatiqn filed Apr. 16, 1 901.) (No Model.)

6 Sheets-Sheet 5. V

J? 6!. T WITNESSES: 177"? INVENTORS BY i I ATTORNEYS."

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UNITED STATES PATENT OFFICE.

WILLIAM E. KREY, OF NEW YORK, N. Y. ,'AND NTON DUPPLER, OE JERSEY CITY, NEW JE sEY, AssICNORs TO THE AUTOMATIC TWISTING-IN MA- CHINE COMPANY, A CORPORATION OF NEW JERsEY.

WARP-TWISTING MACHINE.

SPECIFICATION amine part of was Patent No. 695,566, dated March 18, 1902. I

' Application filed April 16, 1901. Serial No. 56,065. on model.)

To all whom it may concern: I

Be it known that we, WILLIAM E. KREY, residing in New York, in the county and State of New York,and ANTON DUPPLER, residing in Jersey City, in the county of Hudson and State of New Jersey, citizens of the United States, have invented certain new and useful Improvements in Warp-Twisting'Machines;

chine of this nature set forth in United States Letters Patent No. 648,738, issued to Albert Goss May 1, 1900, the general objects'of the invention being to effect improvements looking toward increased durability of the Ina-- chine and its greater efficiency and'accuracy in operation.

The invention is fully illustrated in the accompanying drawings,wherein corresponding letters of reference indicate like parts, and wherein- 0 Figure 1 is a view inside elevation of the machine in operative position on a speciallyconstructed frame. Figs. 2 and 3 are respectively views in front and rear elevation of the machine.

Fig. 5 is a vertical sectional view of the front portion of the frame, taken in the plane of the right-hand pair of hook-bars. Fig. 6 is a front view of what is shown in 5, a certain cover-plate being removed. Figs. 7 and S are respectively front and side views of a partof the mechanism whereby power is transmitted from the main shaft to other parts'of the machine. Fig. 9 is a plan view of one of the pairs of hook-bars and a part of their driving ,mechanism. Fig. 10 is a front view of said hook-bars, showing the arrangement of the threads. Figs. 11, 12, 13, and 14 are detail views illustrating the hook-bar-driving mechgo anism. Figs. 15 and 16 are respectively a clamps proper.

I Fig. t is a horizontal sectional 35 view taken on the line m a: in Fig. 1.

front view and a vertical sectional view of the upper portion of a vertically-reciprocating frame, showing the feeding mechanism for a certain automaticallymovable thread-sus- I taining means or clamp which said frame carries. Fig. 17 is a top plan view of said frame and the thread-sustaining means or clamp which it carries. .Fig. 18 is a view in side elevation of a portion of said thread-sustaining means or clamp. Fig. 19 is an enlarged vernew sectional view of a part of one of said Fig. 20 is an enlarged detail View, partly in section, of the mounting for the revoluble member of the twisting mechanism. Figs. 21 and 22 are respectively a 'view in side elevation and aview in horizontal section on the line 'y y in Fig. 21 of a modi- I fied form of the machine. Fig-23 is a view infront elevation of a portion of whatis shown I in Fig. 21. Figs. 24: and 25 are detail views illustrating a modified form of thread-sustaininglmeans; and Figs. 26 and 27 are front and side views,'respectively, of a specialform of twisting-in frame.

The'machine is designed especially with the 7 5 idea of applying'it to the operation of twistingin new warps in the process of weaving, thus employingit'to supersede the usual hand; operation. For this purpose it may be supported in an operative position on the loom byanysuitable brackets. H'owevenwe prefer to mount it upon an automatically-movable carriage, such as is shown in the drawings, said carriage being mounted upon guides arranged inthe loom or'ina twisting-in frame, 8 5

such as is shown in Figs. 26 and 27 and usually employed where it is expedientto remove the old Warp, together with its harness and reed, from the loom in order to perform the twisting-in operation. I v

mounted on said shaft is arranged a cam it, having a peripheral camway i. In the cavity and mounted on the front end of the shaft c are a roller-carrying disk j, a pin-wheel k, and a gear Z, they being disposed in the order named, with the disk adjacent the end of the shaft.

In the projection on of the uprightb and in the plate (1 is journaled at one side of the shaft 6 another shaft or, which carries a pinion 0, which is driven by the gear Z through an intermediate pinion p. The front end of the shaft 91 has pivotally connected to it the rear end of an extension-shaft (1, which terminates in a spiral r in substantially the shape best shown in Fig. 1 and having its free end disposed adjacent the upright. With the spiral r and branching off from the same at s is formed an auxiliary spirals, the outer end of which is free, as seen in Fig. 1. Beingjointed with the main portion of the shaft 91 in the manner above indicated, the shaft q may be folded around, so as to turn the spirals out of the Way. In order to keep the shafts alined, a sleeve t, arranged to slide on them and cover their joint, is provided.

it designates a stationary shaft projecting forwardly from the upright b and carrying at its front end the stationary member of the twisting mechanism. Said member consists of an arc-shaped pad o, secured to a suitable bracket 20, carried by a sleeve as, which is secured on the shaft u by a nuty or in any other desired manner.

The revoluble member of the twisting mechanism consists of a pad ,2, which is carried by an arc-shaped arm 1, forming the free end of a spindle 2, which projects through the plate (1. At the free end of this and on the periphery thereof is arranged a pair of threadcutting knives 3. At the other end is arranged a deflector 4, adapted to take against the united threads and to force them away from the face of the pads should they tend to adhere thereto.

5 is a guide which is formed withan oblique portion 6 and which is mounted on the bracket 10 for the stationary member of the twisting mechanism, said guide beingadapted to coact with the knives in facilitating the cutting of the threads. The rear endof the spindle 2 is reduced and provided with an internallythreaded socket 7, into which is screwed a stem 8, having a milled nut 9 at its free end. A sleeve 10, which incloscs the reduced portion of the spindle and the stem, is clamped by the milled nutbetween the latter and the shoulder formed at 11 on the spindle. The sleeve is journaled in the uprights b and c. On said sleeve is adjustably secured a collar 12, between which and a projection 13 of a post 14 on the base a between the uprights b and c is compressed a spring 15, coiled about. the shaft. The tendency of the spring is to normally press the rotary shaft 2 longitudinally and the member of the twisting mechanism outwardly. The spindle 2 is mounted in the manner above described so as to be removable for repairs or for replacing with a new one. This may be done without altering the predetermined tension which the spring e2;- ercises on said mechanism by simply unscrewing the threaded stem 8, removing the spindle 2, replacing a new one, and screwing up the stem again. 4

The sleeve 10 carries a gear 16, which is connected with another gear 17 on the shaft e by an intermediate gear 18, being journaled on a stud 1E), projecting from the upright c.

20 is a shaft which is journaled in the two uprights and carries a crank 21, connected with an eccentric point 21 on the intermediate gear 18 by a link 22. The forward end of this shaft carries a sleeve 23, which incloses a spring 24 and which is provided with a slot 25, (see Fig. 2,) which extends inwardly from the free end thereof and which at its rear end connects with an angular notch 26 in said sleeve. The sleeve thus forms one member ofa bayonet-joint,of which the other member is a short shaft 27, having a lug 28, adapted to be received by the notch, and a curved finger 29. By pressing the shaft in wardly and then turning it till its lug is alined with the slot said shaft may be removed so as to get the finger out of the Way when desired.

30 denotes a longitudinally-reciprocating shaft which works in the upright b and has its rear end squared and guided in the post 14. The forward end of the shaft carries a fork 31, whose members have their inner faces first curved outwardly and then inwardly toward each other, their ends terminating the one slightly above the other. The fork is reciprocated by means of a lever 32, which is fulcrumed in the base a at its lower end and which engages the camway t' of the cam 7t through the medium of an antifriction device 33, if desired. This lever has a slot-and-pinjconnection 34 with an arm 35, carried by the shaft of the fork.

36 designates an arm which projects rearwardly from the upright Z2 and on which reing which fits the squared portion of the hookbar and against the flange of which said pinion is pressed bya spiral spring 45, interposed between the pinion and a washer 46, taking against the rear wall of the cavity 0. The adjacent faces of the pinion and disk are provided with ratchet-teeth 47, the nature of which is such that the pinion may be employed to rotate the hook-bar through the ratchet, while, if desired, the hook-bar may be manually turnedin the same direction independently of the pinion. The forward end of each hook-bar is formed with an offset hook portion 48, which is preferably flattened and pointed. These hook-bars are arranged in two pairs, the one beside the other, as seen in Fig. 2, their several 'pinions being grouped about and engaging a gear 49. With one of the pinions43 engages another gear 50, which upright 17 and its plate (1, the lower end of said frame being bifurcated and carrying a pair of parallel and horizontal rods 57, constituting thread-guides. These rods are movable up and down with the frame between other parallel and horizontal rods or thread-f guides 58, which are extended through the two uprights and secured by milled nuts 59, the ideabeing to arrange them removably, so that they may be taken out and straightened. The upper part of the frame 56 is' of rectangular rod-likeform, and on itis mounted the thread-sustaining means. It is actuated by a roller 56 on the disk j, which works in a curved slot 57 in said frame.

6O denotesa bifurcated support, (see, Figsf 1 and 17,),which is penetrated by the rod-like portion of the frame 56 and ,which'is sustained thereon by a horizontal screw 61, penetrating said support and theframe 56 and arranged to turn freely injthem. In the sup port and mounted on the screw with the key, 62 of which its feather 63 engages is a worm:

gear 64. The screw 61 is adapted to be engaged,for the purpose of advancing it inthe support, by a block 65, which has threading engaging the threading of the screw and which is carried at the lower end of a spindle 66, which is normally, pressed downwardly by a spring 67, compressedbetween the block and a slotted plate 68, surmountingthe frame 56. By grasping a knob 69 which the spindle carries and raising and then turning it through ninety degrees'the cross-piece 70,

which the spindle carries, may. be made 'to'f rest on the top of the plate68 transversely of its slot to sustain the block out of engagement with the screw. The worm-gear 61 is engaged by a worm 71, loosely arranged on the upper squared portion 72 of a vertical rotary rod 73, which extends down through the upright b and through the base of the ma: chine.

7etis simplya tubularguard for the'screw 61. The parts 75 of theflbifurcated portion of the support 60 serve. as guides for a carriage 76, having outwardlyextending parallel arms 77. In these arms are fulcrumed pairs of levers 78, each pair carrying .one of. the two clamps for the warp ends. Each clamp consists of three membersa bottom member 79, which rigidly connects the ends of the levers, an intermediate member 80, and a top memher 81. head 82, the ends of which affordpivotal connections between the three members.v The free end of the intermediate member is formed with a hook 83, with which engages a clip 84:, carried by links 85, which are pivoted in the bottom member, said clip being thus adapted to lock the intermediate member down. The clip carries a plate 86, which is adapted to extend over the top member and at its free end to be clamped down by a latch 87, its pivoted end hearing, as at 88, onthe free end of the top member. It is preferable that the contacting faces of the intermediate and top members be concavo-convex and that the bottom and top faces of said members, respectively, be concave and convex, for the warp is adapted to' extend relatively to the parts of the clamp, as shown in Fig. 19. The clamp being pivotally mounted onthe carriage 76 the manner above indicated rests on a curved spring-plate 89 on said carriage, so as to ofier resiliency when the warp is drawn up taut.

The end of the screw 61is swiveled to the carriage 76, being thus adapted to advance the same as it itself advances. Theobjectof this isto cause the threads to successively occupy a given position relatively to the hook.- barsand the other parts as they are successively engaged thereby-4n other words, to

arrange them so that they will all be engaged at approximately the same position and as much under the' same condition of tension as possible.

The member carries at one end a.

. 90 denotes a carriage in which the basectof I the machine is clamped and whichis arranged to slide on guide rods 91. In order to advance the carriage, and with it the machine, as the work-proceeds, an internallyrthreaded tubular block 92, journaled in the carriage and engaging a screw 93, is. provided, said block having a, ratchet 94, which is engaged by a pawl'95, carried at the lower end of a lever 96, which is fulcrumed at 97, in the'nprights and bears against a cam 98 on the shafte of the machine. Thus asthe shaft e is rotated the resultant intermittentaction of the lever is utilized to advance the machine. ,The block 92 also carries a gear 99,

meshing with a pinion 100 on a short shaft 101, which is carried by the carriage 90 and I which is connected with the rod 73 by bevel gearing 102.

. It is preferred that theguide-rods and screw 93 be mounted in the specially-constructed frame shown in Figs. 26 and 27. This frame ispreferably constructed of tubing, a portion of it, 103, being'telescoped with the other portion thereof, 104. 105 denotes bearingblocks arranged in the portion104 of the frame and adapted to carfythe beam 106 for .ing in relatively opposite directions. 7 sion should be maintained on the threads. As

the new warp, being rendered vertically adjustable in said frame by thumb-screws 106'. With parallel vertical tubular parts 107 of the portion 104 are telescoped spindles 107 of supports107, said spindles carrying nuts 107 having threaded engagement with them and resting on the tops of said tubular parts.

Said supports carry the guide-rods 91 and.

screw 93. The portion 103 is provided with clamps 108 for the reed, and with racks 1.09 for the harness 110, said harness and reed being that for the old warp and being, with said old warp, removed from the loom. The tubular parts 111 of the frame in which the bearing-blocks 105 are mounted may be arrangedto be adjustable laterally by being guided between the horizontal portions 112 of the frame, so as to accommodate various lengths of beam 106. In order to turn the screw 93 so as to manually feed the machine back to its starting-point, a crank 113 may be arranged on one end of said screw. Since the warp extending from the beam 106 hasa tendency under the actuation of the machine to work laterally, this may be obviated by providing the bar 114, over which the warp extends from said beam, with aseries of corrugations 115, as by being threaded, wrapped with wire, or the like.-

The operation of the machine will now be described: The hand-wheelf being revolved the block 92 will feed along the screw 93, moving the carriage with it along the guides 91. Themachinemovesbackwardasit unites the threads, leaving the joined threads one after another in front of it. In other words, viewing the machine as seen in Fig. 26, it moves from right to left. Before the machine is put into operation a corresponding portion of each warp is so disposed that each extends over one of the rods 58 under the adjacent rod 57 and then under the adjoining memberof the fork 31, whence it extends upwardly to the clamp, where it is secured, as shown in Fig. 19. It should be remarked that the threads of each warp are arrangedin two sets, the corresponding threads of which cross each other between the members of the corresponding pair of hook-bars-t'. e. one upper and one lower hook-bar-as shown in Fig. 10, said hook-bars extending between the two sets above and below the crossing therein, as clearly described in the patent to Goss, referred to, and having their hooks extend- A tenthe shafts rotates an intermittent semi-revolution is imparted to each pair of hook-bars through the gearing already described, which is inclosed in the cavity 0', and intermittently with such semirevolntions said hook-bars are reciprocated by the carriage 37 from the cam h, so that the desired separating of the threads in each warp, one by one, will be effected. The ends of the hook-bars being offset, as at 18, the threads released stand absolutely disengaged with the hook-bars or warps to move vertically or transversely of the hook-bars in such manner as to cause the release of the outermost or freed threads should their filaments tend to cling to the main body of threads. The drawing back of the hook-bars effects the drawing back of the body of the threads away from the straight line which the freed threads tend to assume, so that a space is left between the main body of threads and the freed threads. Into this space the point of the spiral r is now projected as it is turned from the main shaft through the gearing Z 13 0, said spiral taking the two released threads and, with the spiral s, deflecting them outwardly until they are brought into the range of the rotary member ofthe twisting mechanism. Simultaneously the lever 32 is actuated by the cam 71. to force the fork 31 outwardly, which thus coacts with the spirals to properly advance the threads to the twisting mechanism. It being undesirable that the main body of threads should also move forward, the finger 29 oscillates to int-erpose itself between the separated threads and the main body of threads, so as to hold the latter back. Said finger is actuated through its shaft and the crank 21 and link 22 from the pinion 18, as already indicated.

The outermost or freed pair of threads being brought by the spirals and the fork into the plane of movement of the rotary member of the twisting mechanism, the upper or vertical end portions of the threads will first be cut off and then the short ends twisted about the body portion of one of them in the manner sufliciently indicated in the patent referred to. Bythedeflectoretthejoined threads will be ultimately forced out of range of the mechanism. This operation will continue until all the threads which have been taken taken up and secured by the clamp are disposed of. Meanwhile the machine is moving bodily backward also through the mechanism which connects the clamp-carrying carriage 76 with the rotating block 92 on the shaft 93, said carriage is moved in the other direction, the effect being to keep the clamp in a practically stationary position relatively to the warps. \Vhen so much of the warps have been united, the next succeeding portions are clamped into the machine, whereupon the operation proceeds in the same manner.

It being the tendency of each tense thread to engage each coil of the spiral at the uppermost and consequently the rearmost portion thereof the disadvantage in having the engagement-point of the thread with the spiral so far away from the guides 57'that it will tend to unduly drag on the guides as it is advanced by the spiral and not be delivered to the twisting mechanism with accuracy is overcome by providing the auxiliary spiral s, for then after the thread reaches the spiral s it has engagement not only with that spiral at levers 78 and have cranks 117 for manually turning them. 7

Inasmuch as the portion of each warp taken is reduced in width after it enters the machine, it is found advisable to curve the inner'faces of the fork 31 in the manner'already described, for thenthe threads'will stand'relatively at right angles to the portions of said surfaces with which they immediately engage, and so be prevented from a tendency to move laterally in the fork.

In the modified form of the invention shown in Figs. 21-23 the'vertic'allyreciprocating rods 57 are done awaywith and instead we make use of other reciprocating devices, which, by engaging onlya few of the'threads at a time to effect the desired up-and-down movement thereof, save the wear upon the threads. Moreover, the spirals rand s are also done away with, certain'other expedients being employed to replace them.

The fork Slis provided in each of its members with a slot 118, in which oscillates verti-' eally a foot 119 on'one of a pair oflevers 120,

which is'fulcrumed in and penetrates the upright I). The rear ends of these levers are connected-by a link 121, which is in turn connected'wit-h an eccentric-strap 122on'an eccentric 128, forming a portion of the cam hby a pitman 124. Thus as the eccentric rotates the feet 119 are oscillated, as already indicated, these feet engaging, by pressing down, only a fewof the threads at'a time.

On the shaft 27 in lieu ofthe finger 29 we provide a tapering spreader 125, which oscillates as the finger does, combining the actions of the finger and the spiralsr and s by interposing its point between the separated threads and the mainbody of threads to force the latter outwardly toward the twisting mechanism and hold the former back; If desired, the movable member of the twisting mechanism may carry a spiral 126, adapted to take the threads separated after they haveloeen deflected outwardly asfar as the spreader can eifect this. This spiral simply constitutes practically an extension of the twisting member in question, which already has a substantially spiral form, as seen, for instance, in Fig. 4. In Figs. 21 and 22 the stationary member of the twisting mechanism is removed.

In the modified form of the thread-sustaining means shown in Figs. 24 and 25 spring hooks or hangers 127 are provided, being secured on the carriage 76 in any desired manner. It is designed that a number of the threadsbe knotted together, as shown inFig. 25, or otherwise, to form aZ-loop, and then slipped over each of the'hangers,which should be arranged in series of any number on the carriage.

Having thus fully described our invention,

what we claim as new, and desire to secure by Letters Patent, isi I 1. The combination of a frame, a mechanism, carried by said'frame, for successively uniting the threads of a warp, said frame being movable substantially transversely of the warp, and mechanism for. holding the ends of the warp arranged to move'in the frame in the direction opposite to that of the move-= ment of the frame. r

2. The combination of a frame, a mechanism, carried by said frame, for successively uniting the threads of a warp, said frame being movable substantially transversely ofthe warp, mechanism for holding the ends of the warp .movably arranged in said frame, means for moving said frame, and power-transmitting mechanism operatively connecting the thread-holding mechanism and said framemoving means. 1

I 3. The combination of a frame, a mechanism,'carried by said frame, for successively uniting the threads of a warp, said frame being movable substantiallytransversely of the Warp, a carriage arranged in said frame for movement in a directionopposite to that of the movement-of said frame, warp-holding clamps carried by said carriage, means for moving the frame,'aiid power-transmitting r mechanism operativelyconnecting saidcarriage and the framemoving means.

4. In a machine for successively uniting warp threads, the combination, with the frame, of a uniting mechanism, means for successively advancing the threads to be united to said unitin g mechanism,and thread sustaining means arranged in said frame and movable in the direction of movement of the threads toward said uniting mechanism, substantially as described; I

5. In a machine for'successively uniting warp threads, the combination, with the frame, of a uniting mechanism, meansfor successively advancing the threads to be united to said unitingmechanism, guides arranged in said frame, a carriage movable onsaid guides, means'for moving said carriage, and 'warp-sustainingclamps mounted on'said carriage, substantially as described,

6.In a machinefor successively uniting warp threads, the combination, with the frame, of a uniting mechanism, meansfor successively advancing the threads to be united to said unit-ing mechanism, a support arranged in said frame, a carriage guided on said support, a screw swiveled in said car riage and engaging the support, a gear keyed on said screw, a worm engagingsaid' gear,

1 and warp-sustaining clamps mounted on said carriage, substantially as described.

7. In a thread releasing mechanism for twisting-machines, the combination, with a support, of a pair of reciprocatory and revoluble hook-bars mounted in said support and having their hooks projecting laterally therefrom and in relatively opposite directions, the hook-carrying portion of each hook-bar being offset out of alinement with the other portion of said hook-bar, substantially as described.

8. In a machine for successively uniting warp threads, the combination, with the frame, of spaced thread-holding means, and a pair of reciprocatory and revoluble hookbars arranged in said frame between said holding means substantially in the plane in which the threads extend between said holding means and having their hooks projecting laterally therefrom and in relatively opposite directions, the hook-carrying portion of each hook-bar being offset out of said plane, substantially as described.

9. In a thread releasing mechanism for twisting-machines, the combination, with a support, of hook-bars penetrating said support, sleeves journaled in said support and penetrated by and revoluble with said hookbars, a pinion loosely arranged on each sleeve and having a ratchet-like engagement therewith, a gear engaging the several pinions, a combined gearand star-wheel,said last-nam ed gear engaging one of the pinions, and a pinwheel-engaging said star-wheel, substantially as described.

10. In a twisting mechanism for twistingmachiues, the combination, with a frame, of a stationary member, a revoluble member adapted to wipe against said stationary mem-.

her, a rotary, longitudinally yielding and spring-actuated shaft-like support carrying said revoluble member and journaled in said frame, substantially as described.

11. In a twisting mechanism for twistingmachines, the combination, with a frame, of a stationary member, a revoluble member adapted to wipe against said stationary memher, a rotary spindle carrying said revolnble member, a sleeve removabl y arranged on said spindle, a collar arranged on said sleeve, and a spring interposed between said collar and a portion of the frame, substantially as described.

12. The combination, with a frame, of a rotary spiral arranged in said frame, a shaft carrying said spiral, a rock-shaft, a finger carried.

carried by said rock-shaft, a fork arranged to reciprocate substantially parallel with said shaft, a gear journaled in said frame, a crank on said rock-shaft, a link connecting said crank with an eccentric point on the gear, and power-transmitting mechanism operatively connecting said gear and said fork, substantially as described.

14. In a machine for successively uniting warp-threads, a thread-deflecting device comprising two spirals intercoiled with each other about a common axis, substantially as described.

15. In a warp-sustaining clamp, the combination of three coacting members pivotally connected together at one end, a clip adapted to bind together the free ends of two of said members, and means for binding the third member against said first-named members, a part of said means being carried by the clip, substantially as described.

10. In a mechanism for holding one portion of a Warp at a narrower Width than another portion thereof, a device adapted to be engaged by the threads to maintain a turn therein and having a concave thread-engaging surface on the side thereof away from the wide portion of the warp, substantially as de scribed.

17. In a mechanism for holding one portion of each of two warps at a narrower width than another portion thereof, a bifurcated device adapted to receive and be engaged by the threads to maintain a turn therein, the members of said device having concave thread-e11- gaging surfaces on the sides thereof away from the wide portions of the warps, substantially as described.

In testimony that we claim the foregoing we have hereunto set our hands this 13th day of April, 1901.

WILLIAM E. KREY. AN"ON DUPPLER.

WVitnesses:

ALFRED GAR'INER, JOHN W. STEWART).

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