US1354794A - Article-attaching machine - Google Patents

Description

W. L. BARRON AND A. F. FIFIELD.

ARTICLE ATTACHING MACHINE.

APPLICATION FILED APR. 19, ISIS.

m wir M B m ATTORNEY W. L. BARRQN AND A. F. FIFIELD.

'ARTJCLE AUACHING MACHINE.

APPLICATION FILED APR. 19, 1916- Paiemed 0st. 5, 192690 8 SHEETSSHEET 2.

W. L. BARRON AND A. F. FIHELD.

ARTICLE ATTACHINQ MACHINE. APPLICATION FILED APR. 19. 1916.

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} Ana/m5? 7 UNITED STATES PATENT OFFICE.

WILLIAM L. BARRON, OF NEW YORK, N. Y., AND ALBERT F. FIFIELD, OF NEWARK, NEW JERSEY, ASSIGNORS TO THE SINGER MANUFACTURING COMPANY, A. CORPO RATION OF NEW JERSEY.

ARTICLE-ATTACHIN G MACHINE.

Specification of Letters Patent.

Patented Oct. 5, 1920.

To all whom it may concern Be it known that we, WILLIAM L. BARRON and ALBERT F. FIFIELD, citizens of the United States, residing, respectively, at New York, in the county of New York and State of New York, and Newark, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Article-Attaching Machines, of which the following is a specification, reference being had therein to the accompanying drawings.

In attaching the well-known garmenthooks to fabric material of various kinds it is customary to apply fastening means to the fabric across the hook-shank at the bottom of the throat and additional fastening means through the usual eyes, the purpose being to fixedly secure the hook in position adjacent its longitudinal extremities and prevent displacement thereof relative to the fabric. In practice, particularly when a machine is utilized, it is difiicult to apply the fastening means at the bottom of the throat for the reason that the overhanging hook-bill interferes with the movement of the fastening means to final position closely embracing the hook-shank.

It has heretofore been customary to hold the hook in attaching position with its back against the fabric and then to pass fastening means, in the form of ordinary stitches of thread, across the hook near the bottom of the throat and through the fabric, deflecting the thread around the end of the hook-billv and into the throat as each stitch is drawn down to final position. In constructing a machine for this work it is particularly difficult to provide means for defleeting the needle-thread around the end of the hook-bill with certainty and without breaking the thread, especially when sewing on hooks of the larger sizes having long bills.

It has also been proposed to lay a .first group of fastening stitches across the hookshank immediately behind the eyes and then relatively move the fabric and hook to slip the group of stitches to final position at the bottom of the-throat before passing a second group of stitches through the eyes. The disadvantage of this method, however,

is that the first group of stitches must be loosely formed in order that they may subsequently be slipped over the hump usually found in the shank of a garment hook op osite the end of the bill.

ne of the objects of the present invention is to provide a machine for carrying into effect the method of attaching articles to fabrics described and claimed in the application of W. L. Barron, Serial No. 127 ,374, filed October 24, 1916; the present machine preferably having a reciprocating fastening inserting element and article holding means cooperating therewith to hold an article in a plurality of angularly relating attaching positions, so that the fastening means may be ap lied in different directions relatively to t e article, as its peculiar shape may require. More specifically, the invention has for an object to provide a sewing machine comprising a reciprocating needle and a work-holder having relative lateral jogging movements, the work-holder including means for holding a garment hook in a substantially vertical position adjacent the fabric, with its throat opening upwardly, so that the needle may pass a group of stitches directly into the throat of the hook. A further object is to provide means for subsequently turning the hook, so that it will lie flat against the fabric, preparatory to the application of a second group of fastening stitches through the eyes of the hook. A further ob-ject of the invention is to provide means for shifting an article or hook, improperly positioned in the holder, to a predetermined correct position relative to said holder. Further objects of the invention will appear from the following description and claims.

In its preferred form, the improvement is embodied in a sewing machine of the type disclosed in the atent to J. J. Sullivan, No. 777,564, dated ecember 13, 1904, which comprises a rcctilinearly reciprocating fastener inserting element in the form of an eye-pointed needle. operating in conjunction with a work-holder to which is imparted lateral jogging movements for the production of a group of fastening-stitches and lateral movements at the completion of the first group of fastening-stitches to position the work for reception of a second group of fastening-stitches.

As the invention in its preferred form contemplates holding a garment hook in sewing position with the bend therein in contact with, or closely adjacent, the fabric and with the throat opening upwardly, a pair of special clamping-jaws are provided. These jaws are grooved to grip the side edges of the bill of the hook withou ob structing the throat, and are adapted to turn in the resser-members of a workclamp ofthe type disclosed in the said Sullivan patent. hese special jaws are mounted with their axes substantially in alinement and have an offset pin-and-socket connection between them so that turning movements of one jaw will be imparted to the other, in order that a hook gripped by these jaws may be turned from a vertical position to a horizontal position with its back flat against the fabric. 7

The usual actuating connections extend from the work-clamp to a controlling camwheel, which is provided with suitable camtracks to impart the lateral jogging movements to the work-clamp and this wheel is also made use of in the present instance to impart turning movements to the hookclamping jaws at the proper times during the sewing operation. Provision is made for arresting the motion of the work-holder during the formation of the usual tying stitches near the end of the sewing operation, and thread-cutting mechanism such as disclosed in the United States patent to Horton, No. 807,676, dated December 10, 1905, is provided to sever the thread so that the work may be readily withdrawn at the end of a stitching cycle.

In the accompanying drawings, Figure 1 is a side elevation of an article attaching sewing machine of the well-known Singer tvoe embodying the present invention. Fig. 2 is a perspective View of the work-holder forming a part of the machine illustrated in Fig. 1. Fig. 2 is a plan view of the worksupporting plate and hook-clamping jaws in their relative positions during the first stage of the sewing operation. Fig. 3 is a bottom plan view of the work-holder shown in Fig. 2. Figs. 4 and 5 are side elevations showing two extreme positions of a certain connection at the rear of the work-clamp shown in Fig. 1. Fig. 6 is a perspective of the rear end of the work-clamp illustrated in Figs. 4 and 5. Fig. 7 is a detail view of the hookclamping jaws and the supporting means therefor. Fig. 8 is a perspective of the clamp operating cam-plate shown in Fig. 3. Fig. 9 is a perspective view showing-the relative positions of the needle and hook as'the needle-point penetrates the fabric, preparatory to the formation of the first stitch. Fig. 10 is a perspective view showing the relative positions of the needle and work during the first stage of the sewing operation. Fig. 11 is a side elevation, partly in section, showing the needle and hook-clamping jaws, in the position shown in Figs. 2 and 10. Fig. 12 is a perspective view showing the relative positions of the needle and work during the second sta e of the sewing operation, and Fig. 13 1s a plan view of the completed article as attached to the fabric.

In the preferred embodiment of the invention, as illustrated, the machine, frame comprises a flat bed-plate 1 upon which is mounted the usual bracket-arm 2. The main-shaft 3 is journaled in the bracketarm 2 and provided at its forward end with the take-up cam cylinder 4 having the usual crank-pin connected by means of the pitman 5 with a lateral stud upon the needle-bar 6 which carries a fastener inserting element in the form of the eye-pointed needle 7 cooperating with the shuttle 8, mounted the shuttle race 9, to form a stitch and secure it in osition in.a,manner'well-known.

ustai ned upon the sewing machine bedplate 1 is the slide-bar 10 which carries the work-clamping instrumentalities to be here'- inafter described. Jogging movements laterally of the needle are imparted to this slide-bar and to the work-clamp -through well-known link and lever connections comprising a link 10 connecting the slide-bar to a bellcrank-lever 10*, which is rocked by a link 10 connected to the lower end of a ver tical lever 1O carrying a cam-roll positioned in a cam-groove 11 in the outer face of camwheel 12 mounted on the shaft-13 which also carries the usual worm-wheel 14 driven by the worm 15 on the main-shaft 3. The slide bar 10 is given a' further fastener-positioning movement laterally of the needle at the completion of a group of fastening-stitches to position the work for reception of another group of fastening stitches by the usual connections in the form of a pin 16 rigidly mounted at the rear end of the slidebar 10 and carrying a block 17 vertically adjustable thereon and received within the slotted arm 18 of a rock-lever, another arm 19 of which carries a cam roll 20 running in.

the cam-groove 21 in the inner face of camwheel 12 in a manner well-known.

The main-shaft 3 carries at its rearward the usual belt shifting device 28 and is thrown forwardly to start the machine by the bellcrank-lever 29' connected to an opersupporting projection35', the function of.

which will be hereinafter described. Mounted near the rearwardend of the slide-bar 10 is the block 36 recessed to slidably receive the reduced and down-turned end portion 37 of the'upper work-clamp arm 38. The lower edge of the down-turned end portion 37 is fittedin a transverse groove 40, Fig. 6, formed in the rearward end of an adjustable plate 41, the .forward end of which is held against lateral displacement on the slide-bar 10 by a screw 42, Fig. 2, passing through a slot 42 in the plate 41. The arm 38 is'- capable of limited upward movement and is pressed normally toward the slide-bar 10 by the usual slightly arched,

- leaf-spring 52 rigidly secured to the block 36 by a screw-bolt 53 and forked at its forward end to embrace alug 54 carried by the upper clamp-arm 38.

In order to readily effect adjustments of the upper clamp-arm 38 longitudinally of the slide-bar 10, the plate 41 is provided intermediate its ends with a rectangular,

opening 43, Fig. 3, in which is fitted an eccentric 44 carried by an adjusting lever 45, plvoted at one end to'the slide-bar 10 by a stud-screw 46, and carrying at its free end a clamping-block 47 recessed, as shown. in 2, to receive a segmental plate 48 secured to the slide-bar 10 by a screw 49. One end of the clamping-block 47 is loosely secured to the adjusting lever 45 by a screw 50 and the other end is secured to the lever 45 by a thumb-screw 51 which, when tightened, causes the clamping-block 47 and lever 45 to grip the segmental plate 48, thus holding the lever 45 in adjusted position.

The combined hook and fabric clamping levers 56, 57 are pivotally mounted beneath the forward end portion of the upper clamp-arm 38 by means of the fulcrumstuds 55 and carry at their down-turned forward ends the fabric clamping members or resser-feet 58, 59 which are adapted to to one side of the substantially alined axes of the shanks 6.2, 63 and have curved end portions 70 in'which the bend of the hook is adapted to be seated so that when the jaws are rotated, the hook gripped thereby will turn about anaxis passing very nearly through the center of curvature of the bend, as shown in Figs. 10 and 11. In order that turning movements imparted to the clamping jaw 64 will be transmitted to the companion jaw 65, the jaw 64 is provided with a slightly tapered pin 71 offset from and parallel to the axis of the shank 62. A cylindrical socket 72 is provided in jaw 65 to receive the pin 71. The jaws 64, 65 are recessed at 64 65*, respectively, to provide clearance for the needle during the 'first stage of the sewing operation as shown best in Fig. 10.

To effect the hook grippin and releasing movements of the levers 56, 5 they are provided with downwardly projecting pins 73 which are slidably received in oppositely inclined cam-slots 74 in a cam-plate secured by a screw 76 to a supporting-bar 77 disposed between the levers 56, 57 and slidably secured to the forward end portion of the upper clamp=arm 38 by spaced screws 78,

'79 received in a longitudinally extending slot 80in said clamp-arm. It is desirable that a garment-hook be yieldingly gripped by the jaws 64, 65 and to effect this result a tension-spring 81 i secured at one end to the screw 78 and at the opposite end to a vertically extending post 82 fixed to the upper clamp-arm 38.

To provide for the lifting of the upper clamp-arm 38 and the parts sustained thereby for permitting insertion and removal of the work, the upper end portion of the post 82 is bent forwardly to hook over a rearwardly'projecting block 83 secured to the lower end of the usual lifting bar 84, adapted tobe raised by the treadle-operated lever 85 in a manner well-known.

To provide for a separatiton of the jaws 64, 65 at the same time the clamping feet 58, 59 are raised from the fabric, a bellcrank-lever 86 is fulcrumed on a bracket 87 secured to the upper clamp-arm 38in such a position that the arm 86 of the bellcranklever extends downwardly in front of and rests against the side of the screw 7 9-which is supported by the slide-bar 77 previously described. The other arm 86 of the bellcrank lever extends forwardly beneath the down-turned free end of a fixed stop-arm 88 clamping jaws 64, 65.

To effect properly timed turning movements of the hook-clamping jaws 64, 65 in their respective bearings in the fabricclamping feet 58, 59, the crank-arm 67 previously described is connected by a screw to the front section 89 of a two part link 89, the rearward section 89 of which is secured by a screw 90 to the upper end of a short lever 91, the lower end of which is formed with a lateral hub 92 fulcrumed on the screw-pin 93 rigidly sustained by theplate 94 fitted in the grooved side-face of the block 36 and secured thereto by a screw 95. The link 89 is adjustable in length, the

two sections thereof being secured together" by a thumb-screw 96 extending through a slot 97 Fig. 3, in the section 89 and threaded into the section 89*. A longitudinally extending rib 98 on thesection'89 fitted into a corresponding groove in section 89,

assists in holding the sections in substantial alinement.

Secured to a laterally projecting seat 99, Fig. 6, intermediate the ends of the lever 91, by means of a screw 100, is the lower end of a T-shaped plate 101 the upper broadened end portion of which is provided with a slot 102, in the form of a flattened V, adapted to receive an actuating pin 103 on the lower end of a bellcrank-lever 104,.mounted on the fulcrum-stud 105, sustained by the bracketarm 2 in such a position that the arms thereof may be acted upon in succession by projection 106 on the cylindrical surface of the cam-wheel 12 which surface acts to limit rocking movements of the bellcrank 104 in opposite directions, as shown in Fig. 1. The V-shaped slot 102 has a semi-cylindrical depression 102 at the lower apex thereof, in which the pin 103 is partially received when the parts are in the position shown in Fig. 1. stop-arm 107 secured to the block 36 by a screw 108 limits the forward movement of the lever 91, the rearward movement-.of which is arrested in the position shown in Fig. 4, by the upper edge of the slot 102 engaging the pin 103 on lever 104 which at this time is pressed against the periphery of the cam-wheel 12.

A link 109, Fig. 1, secured at one end to l the lower arm of the bellcrank-lever 104 and secured to the machine head by screws 113, permits the lever 104 to be rocked manually in order to turn the hook-clamping jaws to an inclined position facilitating the insertion of a garment-hook preparatory to a.

sewing operation. During this manual turning operation the slide-bar 10 of the work-clamp is in starting position as shown in Fig. 1 and the pin 103 remains in the depression 102" above described. A finger 114 pivotally connectedat its upper end by a screw 115 to the lower end of the bellcranklever 104, is provided with a pointed lower end 116 received in a groove in the upwardly urged free,end of a leaf-spring 117 secured to the frame by a screw 118. From an inspection of Figs. 4 and 5 it will be clear that the spring 117 acts through the finger 114 to urge the hook-clamp rotating connections to one or the other of their extreme positions.

In the operation of the machine, after the hook and fabric have been inserted, the manually operated lever-arm 110 is pressed backwardly to turn. the hook-clamping jaws to the position shown in Fig. 9. The machine is then started and the needle penetrates the fabric at the point indicated by the needle 7 in Fig. 9 for the purpose of fastening the free end. of the needle-thread. After the needle-point has risen above the fabric and before the second penetration thereof, the projection 106 strikes the arm 104 of the bellcrank-lever 104 and moves the pin 103 rearwardly. At the same time the cam-groove 21 acts through the usual connections to'bodily move the fabric-clamp forwardly, in order to position the hookclamping jaws so that their alined axes will substantially intersect the. path of movement of the needle, as shown in Figs. 10 and 11. As a result of these simultaneous movements in opposite directions, the lever 91 will be tilted rearwardly to the position ghown in Fig. 4 and caused to draw the link 9 rearwardly and turn the hook-clampin jaws to the position shown in Figs. 10 and 11, in which position the grooves are seen to be substantially parallel with the needle so thatthe hook is held with its throat directed upwardly. If, through the fault of the operator, the hook-bill is not properly positioned in the clamping grooves 70 with its bend seated in the curved end portions 70 of grooves 70, so as to lie substantially concentric to the axis of rotation of the jaws 64, 65, the raised surface 34 and projection 35 thereof will be struck through the fabric by the bend of the hook as it turns to the position shown in Fig. 10 and will cause the hook-bill to slide along the clamping-grooves 70 into proper position wherein it is supported from below by the projection 35. It is to be understood that the projection 35' is very short so as not to catch the under thread and prevent its being drawn up to the fabric. The work-holder now receives the usual lateral ogging movements through connections with the cam-slot 11 and the needle lays a group of fastening stitches 7) across the hook-shank at the bottom of the throat, passing the thread directly into the throat as will be readily understood.

After a predetermined even number of stitches has been formed at b and as the needle leaves the work, the cam 106 will have turned to a position to strike the projection 104' on the bellcrank-lever 10 1 and move the pi1 t103 forwardly along the slot 102 in plate 101. At the same time the slide-bar 10 carrying block 36 is moved rearwardly with the result that the fabric-clamp and hook-clamping jaws are returned to the position shown in Figs. 1 and 9, thereby turning the hook about the stitches b as a hinge, whereupon the needle lays a stitch 0 parallel with the first stitch a. As the needle leaves the fabric after laying the stitch 0, the slide-bar 10 is retracted from the position shown in Fig. 1 to that shown in Fig. 5; the right hand portion of the V-shaped slot in plate 101 sliding over the pin 103 held stationary by the cam 106 in contact with the projection 104' on the bellcrank-lever 104. With the hook now positioned relatively to the needle, as shown in Fig. 12, the work-clamp is given another series of lateral jogging movements as the needle passes a group of fastening stitches (2 through the eyes of the hook.

After the last stitch of the group all has been completed at the point e, the workclamp is shifted to starting position, shown in Fig. 9, where the needle makes three penetrations to form two tying stitches adjacent the under face of the fabric in the manner disclosed in the Sullivan patent referred to.

The stop-motion and automatic thread-cutter mechanisms with which the machine is prefably provided'are now automatically tripped into operation to stop the machine and sever the thread, whereupon the finished work may be removed.

The various adjustable elements previously described, to wit: the adjustable link 89, the longitudinally adjustable upper clamp-arm 38 and the adjustable block 1 are provided for the purpose of enabling the machine to sew on hooks of the various commercial sizes. Suitable guide marks may be applied to these parts so that the preliminary adjustments for a hook of given size may be quickly made.

It is to be understood that, while we have shown and described thepresent improvement as embodied in a sewing machine, it is within the purview of the invention to utilize other types of fastener-applying mechanism. The desired relative fastener-positioning movements of the work-holding means and fastener-inserting means may be secured by imparting movements to either or both of said means, as will be readily understood. The invention is not, therefore to be considered as limited to the specific construction shown and described, as various changes in the form, construction and arrangement of parts may be made without departing from the spirit of the invention. The term fabric as used herein is to be given its broad meaning and is not intended to be limited to cloth.

Having thus set forth the nature of the invention, what we claim herein is 1. In an article attaching machine, in combination, means for holding an article in a predetermined attaching position relatively to a body-fabric, and fastening inserting mechanism for securing the article at one point to the fabric, said article holding means being rotatable to turn the article about its point of attachment as a hinge to a different position relatively to the fabric, whereby additional fastening means may be applied to fix the article to the fabric. 1 I w 2. In a garment-hook attaching machine,

in combination, means for holding a 'garment hookwith its bend adjacent the fabric and with its throat directed at an angle to the fabric, and a device for inserting fastening means into the throat of the hook and into the fabric.

3. In a sewing machine, the combination with stitch-forming mechanism including a reciprocating needle, of a fabric support, and means for holding a garment hook with its bend adjacent the fabric and with its throat extending substantially in the direction of reciprocation of said needle, whereby fastening stitches may be passed directly into the throat of the hook and into the fabric.

4. In an article attaching machine, in combination, means for holding a garment hook with its bend adjacent the fabric and with its throat directed at an angle to the fabric, and a device for inserting fastening means into the throat of the hook and into the fabric, said hook holding means being shiftable to subsequently lay the back of the hook against the fabric, whereby additional fastening means may be passed through the eyes of the hook and into the fabric.

5. In a sewing machine, the combination with stitch-forming mechanism including a reciprocating needle, of a fabric support, and means for holding a garment hook with its bend adjacent the fabric and with its throat extending substantially in the direction of reciprocation of said needle, whereby fastening stitches may be passed directly into the throat of the hook and into the fabric, said hook holding means being shiftable to subsequently lay the back of the hook against the fabric, whereby additional fastening means may be passed through the eyes of the hook and into the fabric.

6. In a machine for sewing on garment hooks, or the like, the combination with fastening inserting mechanism, of a fabric support, gripping means for holding a garment-hook with its bend adjacent the fabric and its throat directed at an angle to the fabric for reception of a fastening, and means for rotating said gripping means to lay the back of the hook against the fabric for reception of an additional fastening.

7. An article attachin machine comprising, in combination, astening msertmg means including a reciprocating element,

fabric supporting means, mechanism for producing relative lateral movements of said reciprocating element and said fabric-supporting means, and article-holding means mounted for turning movements about an axis extending transversely of and closely adjacent the path of reciprocatory movement of said element, whereby an. article may be held in difierent attaching'positioiis relative to the fabric during the attaching operation.

8. An article attaching sewing machine comprising,'in combination, stitch-forming mechanism including a reciprocating needle, fabric supporting means, mechanism for producing relative jogging movements of said reciprocating needle and said fabric supporting means, and article holding means mounted for turning movements I about an axis closely adjacent and extend- -stitch-forming mechanism including a reciprocating needle, and fabric-clamping means, said stitch-forming mechanism and fabricclamping means having relative stitch-positionmg movements laterally of the needle,

' 'ofhook-holding means mounted for tuming imovements about an axis extending transversely. of and closely adjacent the path-bf reciprocatory movement of the needle whe'reby the hook may be held in different attaching positions relative to the fabric.-

11. In a sewing machine, in combination, stitch-forming mechanism including a reciprocating needle, a fabric-support, means for producing relative-lateral jogging move ments of said needle and support, and rotatably mounted means for holding agarmenthookin different positions relative to the fabric during the sewing operation.

12. In a machine for sewing on garmenthooks or the like, the combination with stitch-forming mechanism including a reciprocating needle, a fabric-clamp, and means for producing relative lateral jogging movements of said needle and clamp, of garment-hook clamping elements mounted for turning movements relative'to said fabric- .clamp whereby a hook may be held in different positions relative to the fabric during the sewing operation.

13. In a machine for sewing on garmenthooks or the like, the combination with stitch-forming mechanism, of a fabricclamping means, garment-hook clamping elements, and means for imparting to said garment-hook clamping elementsmovements of rotation relatively to said fabricclamping means during the sewing operation. 7

14:; In a sewing machine, in combination,

stitch-forming mechanism, including a re- I ciprocating needle, a fabric-support, means for producing relative lateral jogging movements of said needle and fabric-support, article-holding means pivotally mounted on an axis extending transversely of the direction of reciprocatory movement of the needle, and means for imparting to said articleholding means turning movements about said axis. a

15. In a sewing machine, in combination, stitch-forming mechanism including a reciprgcating needle, a fabric-support, means for producing relative lateral jogging move ments of said needle and fabric-support, article-holding means pivotally mounted on an axis extending transversely of the direction of reciprocatory movement of the needle, and automatically operated means for imparting to said article-holding means turning movements about said axis.

16. In a sewing machine, in combination, a main-shaft, stitch-forming mechanism including a reciprocating needle actuated by said shaft, a work-holder including pivotally mountediarticle-holding means, and means driven by said shaft for bodily moving said article-holding means laterally of the needle and imparting turning movements thereto, during the sewing operation.

17. In a sewing machine, in combination, stitch-forming mechanism including a reciprocating needle, a fabric-holder having the plane of its fabric-supporting surface intersected by the path of movement of said needle, and article-holding elements pivotally mounted on an axis extending transcle-holding elements pivotally mounted on an axis substantially intersecting the path of movement of the needle:

20. In a sewing machine, in combination, stitch-forming mechanism including a reciprocating needle, article-holding means pivotally mounted on an axis extending transversely of and substantially intersecting the needle-path,and means for producing relative jogging movements ofsaid needle and article-holding means laterally of said needle and longitudinally of said axis.

21. In a sewing machine, in combination, stitch-forming mechanism including a reciprocating needle, a fabric-support, garment-hook clamping members having opposed hook-engaging grooves extending in the same general direction as the needle and adapted to support a garment-hook with its throat opening upwardly, and means for producing relative lateral jogging movements of said needle and clamping members whereby stitches will be laid directly into the throat of said hook.

22. In a garment-hook sewing machine, the combination with a reciprocating needle, a vibrating work-clamp and operatlng means therefor including a cam-wheel, hook clamping jaws pivotally mounted upon said work-clamp, a lever pivotally mounted ad acent the periphery of said cam-wheel and connected to turn said jaws on their pivots and means on said cam-wheel for moving said lever first in one direction and subsequently in the opposite direction.

23. In a sewing machine, in combination, a frame, a work-holder mounted on said frame and comprising a fabric supporting member and a downwardly spring-pressed presser-member including spaced reciprocally movable article-gripping jaws mounted to swing about substantlally vertical axes as they grip or release an article, means for lifting said presser-member, a stop carried by said frame, and a device reacting against said stop to separate said clamping jaws when said presser-member is lifted.

24. In a sewing machine, in combination, a.-frame, a work-holder mounted on said frame and comprising a fabric-supporting member and a downwardly spring-pressed presser-member; said presser-member including a pair of spaced article-gripping jaws, a controller element, and connections between said controller element and said article-gripping jaws for moving the latter simultaneously in opposite directions to grip or release an article, means for lifting said presser-member, a stop carried by the frame, and a device reacting against said stop to shift said controller element and separate said clamping jaws when said presser-member is lifted.

25. VVork-holding mechanism for sewing machines comprising a frame, a work-supporting member having a work-sustaining face, an article-holding member constructed with a support, a pair of reciprocally movable levers mounted on said support and provided with laterally spaced articleclamping jaws, means for lifting said support, a stop carried by the frame, and a lever sustained by said article holding member and adapted to separate said jaws, said stop being positioned inthe path of movement of said lever, whereby the articleclamping jaws will be separated as said article-holding member is lifted.

26. A work-holder for sewing machines comprising, in combination, a fabric support, presser means opposed to said support, and article gripping means mounted for turning movements relatively to said fabric support and presser means.

27. A work-holder for sewing machines comprising, in combination, a fabric-supporting plate, supporting members opposed to said plate, and article-gripping jaws mounted for turning movements in said supportin members.

28. work-holder for sewing machines comprising, in combination, a, fabric-supporting plate, fabric-clamping members opposed to said plate, and article-gripping jaws mounted for turning movements in said fabric cIamping members.

29. A work-holder for sewing machines com rising, in ombination, a fabric-supporting plate, fa ric-clamping members opposed to said plate, and article-gripping jaws mounted in said clamping members for turning movements about an axis substantially parallel to said plate.

30. work holder for sewing machines comprlsing, in combination, a fabricsupporting plate, supporting members opposed to said plate, opposed article-gripping jaws havingshanks journaled in said supporting members in substantial alinement, a pinand-socket connection between said jaws eecentric to said shanks, and means for turnfor sewing machines comprising, a lower fabric support, clamping means mounted for movements toward and from said support, and article-holding means rotatably mounted on said clamping means.

32. A combined fabric and article clamp for sewing machines comprising, -a lower fabric support having a substantially flat fabric-supporting face, clamping means mounted for movement toward and from said support, and article-holding means mounted on said clamping means to turn about an axis substantially parallel witlksaid fabric support.

33. A work-holder for sewing machines comprising, in combination, a main-shaft, a fabric-clamp, article-gripping means rotatably mounted therein, connections between said main-shaft and said article-gripping means for imparting turning movements thereto, and manually operated means for turning said gripping means.

34. In a sewing machine, in combination, a main-shaft, a fabric-clamp, article-gripping means rotatably mounted therein, lostmotion connections between said main-shaft and said article-gripping means for imparting turning movements thereto, and manually operated means acting through said connections to turn said gripping means.

35. A work-holder; for sewing machines comprising, in combination, a fabric-supporting plate, clamping members opposed to said plate, article-clamping means rotatably supported by said clamping members, actuating means, and connections between said actuating means and said fabric and articleclamping means for bodily moving said fabric-clamp and turning said article-clamping means.

36. An article-clamp for sewing machines comprising, in combination, pivotally mounted article-clamping means, devices for determining the limits of turning movements thereto and to the stitch-forming mechanism.

38. In an article attaching sewing machine, a work-holder including a rotatably mounted articleholding device, and means acting as said device is rotated to correctly position an article improperly situated in said device.

39. In .an' article attaching sewing ma chine, a work-holder including a rotatably mounted article holding device, and a stop acting as said device is rotated to correctly position an article improperly situated in said device.

correctly positioned between said hook-holding elements to a, predetermined correct position relative thereto.

42. A sewing machine comprising stitch forming means, and a work holder having means to sustain a hook with its shank approximately parallel with the path of the needle.

43. A sewing machine comprising stitch forming means, and a work holder having movable means to sustain a hook with its shank approximately parallel with the path of the needle.

44. A sewing machine comprising stitch forming means, a work holder having movable means to sustain a hook with its shank approximately parallel with the path of the needle, and means to effect movement of said hook to bring its shank to an angle with said needle path.

45. A sewing machine comprising stitchforming means, a work-holder movably mounted, a swinging hook carrier mounted on said work-holder, means for moving said work-holder and means for effecting swinging movement of saidhook carrier during a movement of said work-holder whereby to change the angle of a hook in said carrier relative to the stitch-forming devices.

In testimony whereof we have signed our names to this specification.

' WILLIAM L. BARRON.

ALBERT F. FIFIELD.

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