US1737262A

US1737262A - Method of making fastening devices

Info

Publication number: US1737262A
Application number: US277009A
Authority: US
Inventors: Louis H Morin
Original assignee: Cambridge Rubber Co
Current assignee: Cambridge Rubber Co
Priority date: 1926-10-07
Filing date: 1928-05-11
Publication date: 1929-11-26
Anticipated expiration: 1946-11-26

Description

Nov. 26, 1929. L. H. MORIN 1,737,262

METHOD OF MAKING FASTENING DEVICES Original Filed Oct. 7, 1926 4 Sheets-Sheet l avweuto'a Nov. 26, 1929. 'L. H. MORIN I 1,737,262

/ METHOD OF MAKING FASTENING DEVICES Original Filed Oct. 7, 1926 4 sheets-sheet 2 Nov. 26, 1929. L. H. MORIN 1,737,262

METHOD OF MAKING FASTENING DEVICES Original Filed Oct. 7, 1926 4 Sheets-Sheet 5 INVENTOR ATTOR EY Nov. 26, 1929. L. H. MORlN 1,737,262 METHOD OF MAKING FASTENING DEVICES Original Filed Oct. '2', 1926 4 Sheets-Sheet 4 4 I 1 INVENTOR I 3 Y 6J5 i Arrow I as Patented Nov. 26, 302% are.

IAEUIS H. MOBI'PN, GE HEW 2935K, N. Y1, ASSIGNQR T CAMBRIDGE RUBBER CQEZPANY, GE CAMBRIDGE, MASSACHUSETTS, A. CQRPOJRATION 0F MASSACHUQETTS METEQD OF MAKING FASTENING DEVICES riginai application filed catcher 7, 19 26, Serial No.

140,005. Divided and this application filed May 1-1,

1028. Serial No. 277,009.

This invention relates to fastening devices comprising stringers, each containing a pluraiity of links so fashioned that the separate stringers are adapted to be' coupled together when the links thereof are interlocked, and particularly to a method for manufacturing devices of this class, and particularly devices similar to that shown, described and claimed in United States Patent No. 1,557,304, dated n October 13, 1925, granted to Davis Marinsky;

said mounting strand; a further object being,

to provide a method whereby the severallink members may be arranged on the mounting strand in juxtaposition or abutting relation, and further whereby the operation of the mandrel and feed screw will discharge the a still further object being to provide means for rendering the wire feed inoperative for a predetermined period of time, to provide on the stringers formed, blank spaces or in other words, spaces where the links are not secured to the mounting strand, the strand serving merely to couple the stringers together to facilitate further production of the complete device; a further object being to provide a method whereby the number of links contained in the respective groups on the mounting strand may be governed, as well asthe spaces between said groups; and with these and other objectsin view, the invention consists in the construction of devices of the class referred to in accordance with the method hereinafter more fully set out.

- The inventionherein set forth constitutes divisional subject matter of, a 'prior application filed by me, October 7, 1926, and bearing links and mounting strand from the machine;

be 21 passed around the pulley 20 and a Serial No. 140,005 and is fully disclosed in the following specification, of which the accompanylng drawing forms a part, in which the separate parts of my improvement are designated by suitable reference characters in each of the views, and in which:

Fig. 1 is a front view of a machine made 7 according to my invention, with parts of the construction broken away and in section.

Fig. 1 is a detail view of a part of the construction shown in Fig. 1. i

Fig. 2 is a side View of the machine seen in Fig. 1, with part of the construction omitted.

Fig. 3 is aplan view of the machine, with parts of the construction broken away and in section. i

F Fig. 4 is a partial section on the line 4-4 of ig. 3. w J

Fig. 5 is a view similar to Fig. 1, and showing only a part of the machine on an enlarged scale, and with part of the construction broken away and in section.

Fig. 6 i' a partial section on the line 66 of Fig. 5.

Fig. 7 is a perspective detail view of a crimping jaw, two of which are employed,"

Figs. 8 and 9 are sectional, detail views of parts of a wire feed which I employ.

Figs. 10 to 17 inclusive, are diagrammatic views illustrating the several steps in the formation of the separate links of the fastener device in question, and securing the sameto a mounting strand and,

Fig. 18 is a horizontal, sectional view d-iagrammatically illustrating the arrangement of parts seen in Fig. 10 of the drawing.

In Fig. 1 of the drawing, I have shown at 20, the table or base of the machine proper, supported upon side frame members 20*. Mounted upon-rods 20 or other supports at the lower end of said frame members is an electric motor 20 on the shaft of which is a pulley 20 around which a belt or chain 20 is passed, .said belt or chain passing around another pulley 20 on a shaft 20 supported in the frame member 20. One end of said'shaft projects through the frame memfl her and is provided with a pulley 20. A

,,

bearings

22 and 22 on the table of the machine, and

other bearings

22 and 22 are employed for supporting other shafts, later described. The shaft 22 extends transversely of the machine and. secured thereto is a plurality of-cams for actuating the several parts or mechanisms of the machine, said cams being designated by the reference numerals '23, 24, 25-25, 26 (note Fig. 6) 27, 2s, 29 and 30, it being noted that the cams 25-25 constitute one body having different cam faces on the opposite sides thereof.

The wire 31 from a spool or other source of supply, in entering the machine, first passes through two sets of straightening

rollers

31 and 31? arranged in different planes, then through an adjustable tension device 31 and into and through a wire feed 32 comprising alever 33, a slide plate 34 slid'ably mounted in and keyed to a frame plate 22' extending between and secured to the front faces of the bearings. 22 and 22. Secured to the slide plate '34 is a supplemental plate 34, the lever 33 being pivoted to and between the plates 3434" as seen at 32. The short end of the lever 33 has a jaw piece 33 movable're latively to a fixed jaw piece 34 on the plate 34 to clamp and firmly grip the wire 31 in the move- I ment of the slide from right to left in the feed of said wire. The'wire also passes through an aperture in a fixed pm 34 secured to the plate 34. A screw 34 aids in -with' an anti-friction [roller 33 which is securing the plate 34' to the slide 34, and supported between the plate and the sllde 1s a rectangular block 34 in connection-with which a .pawl portion 33 on the, lever 33 operates. Y

Pivotally. coupled with the lever 33 is a rod 35 which extends to the right and is pivoted to a rocker arm 35 mounted in a block 35 supported on the table 20 of the machine. The arm 35 carries, a roller 35 which operates in the groove of the cam 28.

j The cam 28' serves to impart movement to the lever 33 and the carriage 34 to advance the wire 31 into the'machine, it being understood that in the movement of the rod .35 to the right, the jaws 3334"'are opened and the feed device passes freely .over the wire 31.

The free end of the lever 33 is provided adapted to pass over a shoe 36 when moved into the path of the roller 33c tohold the 43 secured thereto.

jaw 33' of the lever 33 in inoperative position to prevent the feeding of the wire 31 for a predetermined number of cycles of the machine. The movement of the shoe 36 is controlled by employing a plurality of blocks 36 on the links of a chain 36 which passes around a sprocket'36secured tothe shaft 37, geared to the shaft 22 through a chain of'gears 37, 37, 37 and 37. The shoe 36 is mounted on a slide rod 36 having a roller 36 at its inner 'endin connection with which the blocks 36 operate. A spring 36 is employedto normally hold said rod and the shoe 36 in inoperative position, but the same is moved into position to engage the roller 33 when the blocks 36 engagethe roller 36 and move the shoe 36 outwardly.

The shaft-37 is supported in a U-shaped bearing plate 38, and the rod 36 is supported in

guide blocks

38 and 38, the latter being clearly seen in Fig. 4-of the drawing. It-

will also be noted that the chain 36 is passed around a 'guide pulley 38 supported in an adjustable arm 38 mounted on one of the rods 20". With this construction, and further by the use of arms 38 of different lengths, the length of the chain 36 may be varied to suit the requirements, it being understood that the chain length will govern the number of fastening devices mounted in juxtaposition on the mounting strand employed, while the number of blocks 36 will govern the length of the f space between the groups of fastening devices on said strand:

I In feeding the wire 31 into the machine, the end portlon thereof passes between two sets of pins 39-39", 40 40 mounted in oscillatory members 40*. and 40 respectively, the

.moved upwardly "and transversely across the wire,- to shear off a workpiece, the blade being supported between the plate 223and a late The lower end 0 the blade 42 carries a plate 42* adjustably supported ona block 42 movable vertically on two rods 42, the block 42 carrying a roller 42 which 0 erates in the groove of the cam 27 employe for imparting movement to the shear-off tool or blade 42. l

Atone side of theblade 42 is a forming tool 44 whichmoves upwardly with the blade 42 in the shearing operation, a predetermined degree, sufficient to engage the wire to hold the workpiece .cut therefrom in position as seen in Fig. 11 of the drawing. The tool 44 is also supported and guided within and between the plates 22 and43, and is adj ustably coupled with a block 44 slidable'upon guide rods 44*, the block 44* carrying a roller 44 which operates in the groove of the cam The

rods

42 and 44 are supported upon the table 20 of the machine as clearly seen in Figs. 5 and6 of the drawing. The upper end of the forming tool 44 is provided with an arc-shapedrecess 44 of such circumference as to bend the wire workpiece around a 1113.11, drel and feed screw 45 as later described.

The tool 44 has three distinct upward movements fromthe normal position of the tool seen in Fig. 10 of the drawing, the first movement being illustrated in Fig.11, the second in Fig. 12, and the last in Fig. 13, and from the position shown in Fig. 13, it returns to the position shown in Fig.10. After the tool 44 has been raised to the position shown in F ig. 11,. the end portions of the wire workpiece are fashioned to form open loops 31, which result is accomplished by the partial rotation of the

oscillatory members

40 and 40 to move the

pins

40 and 40 laterally and circumferentially with reference to the pins 239 339 fromxthe position shown in Figs. 10 and 11 to that seen in Fig. 12. The members 40* and 40 are provided at their innerends with gears 46-46 which mesh with a vertically slidable rack 46 supported in connection with the plate 22. A rocker arm 46 is coupled with the upper end of the rack and mounted upon a shaft 46, said shaft being supported in the

bearings

22, 22 and 22 A lever 46 is secured to said shaft adjacent the bearing 22"? with which lever, a link 46 iscoupled, and carries a roller engaging the groove of the cam 29, note Fig. 1, to impart reciprocating'movement to said shaft 46 to raise and lower the rack 46*. The raising of said rack causes the

members

40 and 40 to rotate apartial revolution,

forming the loops 31 as above stated. a In this operation of forming said loops, the tool 44 has been raised slightly to bring the workpiece into engagement with the lower face ofthe mandrel {and feed screw 45, and into one of the grooves between the threads of said screw.

ported in a slidable block 47 in connection with the upper-end of which the two pins.

F or a short period of time, the tool 44 remains-in the position seen in Fig. 12, and the

pins

39 and 39 are moved backwardly or withdrawn from the face of the members 40 7 .and 40, and at the same time, the

pms

40 and 40 are partially returned to their normal The above described operation of with drawing

thepins

39, 39 is accomplished by the action of the cam 26 upon a roller 47 supe 39 -39 are supported. the block 4'7 being normally held outwardly'by a spring 47"v arranged in atubular portion of said block, the

movement of the workpiece into the position.

shown in Fig. 13 of the drawing. After the workpiece has been completely formed, and the tool 44 lowered into its normal position, said pins areagain projected to receive the end of the wire fed into the machine; It will also be noted that when the workpiece is in the position shown in Fig. 13 of the drawing, the small loops'3l are arranged at the opposite sides of a mounting strand 48 which may be composed of any suitable flexible material taken froma spool 48 seen in Fig. 2 of the drawing, and passed around a tension device 48 forwardly through a guide loop 48 on the plate 47 and through an aperture in a bearing block 49 supported in the'plate 22 in which block. the

members

40 and 40 are mounted, as well as the mandrel 45. The strand is arranged just above the mandrel 45 and in axial alinement therewith, so that whenthe smali loops and end portions of the workpiece are .crimped together, the

strand 48 Will enter said loops and the loops will encircle said strand.

The next or crimping operation above referred to is accomplished by two similar crimping jaws 50, movable toward each other at a point between the mandrel and the strand 48, and just above the mandrelto complete the formation of the loop 31. The edges of the jaws 50 are preferably provided with notches as seen in Fig. 7 of the drawing to receive and definitely space the wire .of the. workpiece and to retain the small loops side by side and in abutting relation when mounting the same on the strand 48. Each jaw 50 has an enlarged body 50 to which it is secured, said body being supported and guided.

in and between the plate 22 and a plate 51 secured to the plate 22. Rocker arms 52' are pivoted between said plates as seen at 52 and having intermeshing segmental gear faces 52 whereby the movement of one rocker arm will correspondingly move the other arm,

and saidarms have ball ends 52 operating in sockets 50 in the bodies 50*. The body'50 as seen to the left in Figs. '1 and 5 of the drawing, has an extension 50 slidably mounted upon a rod 50 supported in the

bearings

22 and 22 and which carries a roller operating in the groove of the cam 24 asseen in Fig. 1 of the drawing. From the foregoing, it will be seen that when the jaw 50 at the'left of the drawing is moved to the right, the other jaw is moved to the left to bring said jaws together, performing the crimping operation seen in- Fig. 14 of the drawing.

The first crimping operation is not complete, and in the cycle of operation of the machine, a finished crimping operation'is performed to fixedly secure the small loops 31 on the mounting strand 48 as seen in Fig. 16 of the drawing.

shaft 54 supported in the bearings-'22", 22 I and 22. At one side of the rocker 53 is a projecting lever 53 with which is pivoted a link'54 the free end of which carries a roller 54 which operates inthe groove of the cam 25. With this construction, the rocker 53" is oscillated to impart vertical movement to the tool 53 for the purpose above stated.

After the last crimping operation, above referred to has been performed, the mandrel 45 is rotated sufficiently to feed the complete link designated as 55 outwardly, and to correspondingly feed the mounting strand 48- outwardly'to allow for the formation of another link in abutting relation to the first named link, it being understood that the two small loopsof the completed link are arranged on the mounting strand, while the one large loop projects radially therefrom. As

previously stated, the mandrel 45 is supported in the block 49, and the same extends backwardly and passes through the block 47 and is coupled with a chuck 56'supported on a shaft 56 having at its inner end a beveled pinion 57 which meshes with a beveledgear 57 mounted upon a shaft 58 supported in the

bearings

22 and 22. t 4

Secured to the shaft 58 where it projects through the bearing 22 is a gear 59 having a clutch face whereby a spring pressed clutch collar 60, keyed to the shaft 58, will rotate said shaft when the gear 59 is rotated in onedirection, and will remain stationary to move outwardly when said gear is rotated in the opposite direction. A rack61-is in operative connection with the gear 59, said rack being provided with an enlarged 'head 61' through which the shaft 22 passes, the head being in the form of a yoke carryingfa roller 61? which operates in the groove of the cam 30, note Fig. 3 of the drawing. The V 1 other end of therack 61 is provided with anelongated aperture in connection with which a pin .62 operates to support the teeth of the rack in engagement with the gear 59, the

pin 62 being mounted u on the bearing 22. note Fig. 2 of the drawlng. It will be apparent that the inward or.backward movement of the rack 61 will cause the mandrel to be operated through the gears 57 and 573 retain the mandrel in fixed position, the

clutch moving outwardly againstthe tension of the clutch spring 60. It will also be understood that the threads of the feed screw or mandrel 45 will govern the pitch or angular arrangement of the large loops of the links 55. The direction of the pitch may be varied byusing mandrels having opositely arranged threads, or in other'words,

eft and right handed threadsmay be employed.

The formation of the separate links, as above described, relates to links in which the large loops are straight or unkinked.

In devices of the class underconsideration,

at least ohe of the two stringers to be coupled together must be composed of links having kinked or ofl'setportions to interlock with the other or plain links. Inthe formation of the stringers, wherein the links are provided with kinked or offset portions, I provide a punch 63 having a V-shaped end 63 to forma kink 64 in thewire 0r rod. of a workpiece 64 cut therefrom, the female portion 63" of the punch being arranged in alinement therewith, as clearly seen in Fig. 17 of the drawing. This operation is per formed in the workpiece 64'* when it is in a position similar to that shown in Fig. 11 of the drawing. The punch 63 is slidably.

mounted'in a block 65 secured to the plate 43, said punch having a rack 66 on its under face for engagementwith a gear 67 mounted upon a shaft 68 supported in the block 65, and the bearing22".

Secured to .the shaft 68 adjacent the bearing 22 is a rocker .arm'i'69 having a link 70 pivoted thereto, the

link 70 carrying a roller engaging the It will be understood that when the plain f or unkinked link is formed, the punch in cluding its supports, is removed from the' machine-and replaced whenever it is desired to produce the kinked linksthereby' How,-

ever, in actual production, one machine may ported in connection with the table 20 of the fitted with the kinking means while the other would be without such means. A workpiece supporting guide 71 is-supthe machine in front of the block 65, said uide having a channeled arc-shaped face 2,.in .whichthe'. stringers coupled by the mounting strand, are placed, and .over which said stringers ass in the operation of the machine, it being understood that a large number of link sections, which will constituteinde endent stringers in the production of the evices in question, are made and collected in a basket or other container pomenace sitioned beneath the guide 71, and on the door or other surface, it being understood that the separate sections of links are severed one from the other by cutting the mounting strand at the spaces a on said strand. It will also be understood that the links are fed outwardly through the imachine by the feed screw or mandrel in the intermittent rotary movement imparted thereto.

The operation of my apparatus will be readily understood from the foregoing description when taken in connection with the accompanyin drawings and the following statement. n the cycle of operation, the wire is first fed into and between the pins in the members all? and 40 with the parts in the position seen in Fig. 10 of the drawing, the cams cooperating with the parts being diagrammatically illustrated. The next operation consists in cutting ed a portion-of the wire to form a workpiece and to bring the f forming tool 44 into engagement with the workpiece to retain it against accidental displacement from said pins, at which time, the kink forming punch is brought into operation assuming that the kinlr is desired, and this position of the parts is seen in Fig. 11 of the drawing. The next step consists in raising the tool it and rotating the members 4:0 and 40- to term the small loops 3]. at the ends of the workpiece, and further to bring the central part of the workpiece intoengagement with the mandrel45, this position of the parts being seen in Fig, 12 of the drawing. In the next step of the cycle of operation, the forming tool it advances still further upwardly and wraps the wire around the mandrel to form the large loop 31 and to bring the small loops 31 in alinement with the mounting strand 48 as seen in Fig. 13 of the drawing. The crimping jaws 50 are then advanced to partially crimp the workpiece around the mandrel, and the small loops 31 around the strand 48 as seen in Fig. 14. The punch '53 is then brought downwardly to securely force the loopstll onto the mounting strand 48 as seen "in Fig. 15, after which .the crimping jaws 50' are again brought into ongagement with the workpiece'to firmly crimp the same intermediate the large loop and the small loops on the strand, thus fixedly retaining the links to, the strand, which operation is indicated in Fig. 16 of the drawing. The last operation in the cycle consists in feeding or advancing the formed link as wellasthe mounting strand on the mandrel by its rotation in order topermit the formatioruof another link in the manner I above described. As a matter of fact, the feeding operation of the finished link takes place at the same time that the end of the wire is fed into'position the machine operation, it being understood that the operation of the mandrel can take place at any time between the operations seen in Figs. 10 to 12 inclusive. It will also be understood that in the above described operation of raising the tool 44 from the position shown in Fig. 121:0 that shown in Fig. 13, the

pins

39 and 39" are withdrawn or moved backwardly to permit the upward movement of the workpiece over the outer face of'the members 40' and 40?. It will also be understood that alter a predetermined number of links have been mounted upon thestrand 48 which may be governed by the number of links in the chain 36", the blocks 36 on said chain will operate to advance the shoe 36 to put the wire feed mechanism out of operation and to hold the same in inoperative position for. a period which will govern the length of the space desired between the groups of links arranged on the mounting, strand. As soon as all of the blocks 36 have passed over. the roller 36% the wire feed mechanism will be returned to its normal or operative position and will continue to feed the wire into the machine to permit the formation of the links...

It will be understood that while I" have I shown and described the formation or the links of stringers of specific construction,

that my improved machine or apparatus is .4

not necessarily limited to the particular type of link formation herein set out nor am I necessarily limitedto the specific structure of I the several parts of the apparatus nor the mwe or ratio of gearing-eployed, and various other changes in and modifications of the construction herein shown and described may be made within the scope of the appended claims without departing from the spirit of my invention or sacrificing its ad vantages.

Y Having fully described my invention; what I claim as new and desire to secure by Letters Patent, is:

'1. The herein described method of manufacturing flexible stringers composed of a, plurality of links secured to a mounting strand which consists in feeding-an endless metallic strand into a machine, severing the strand to form a workpiece of predetermined length, curling the ends of the workpiece to form loops on said ends, fashioning the central portion of the workpiece to form a loop therein, moving the looped ends into common alinemeut and with. said loops encircling a strand normally positioned between said ends and then firmly compressing the last mentioned loops on said mounting strand to secure the samethereto.

2. The herein described method of manufactoring flexible stringers composed of a plurality of links secured to a mounting strand which consists in feeding an endless metallic strand into a machine, severing the link.

,3. The herein described method of manu-- 65 7 v7. The

strand to form a workpiece of predetermiiied length, curling'the ends of the workpiece to form loops on said ends, fashioning the central portion of the workpiece to form a loop therein, moving-the loo ed ends into common facturing flexible stringers composed of a plurality of links secured to a mounting strand, which consists in feeding an endless 2o metallic strand into a machine, severing the strand to form a workpiece of predetermined length and forming a kink or ofi'set portion centrally of the workpiece, curling the ends of the work iece to form loops on said ends,

fashionin'g t e central kinked portion of the workpiece to form a loop therein, moving the loo d ends into common alinement and with sai loops encircling. a strand normally positioned between said ends, and then firmly a0 compressingthe last mentioned loops on said mounting strand to secure the same thereto.

4. The hereln described method of manufacturing strin ers comprising a mounting strand with a p urality of independent links' mounted on and secured to said strand, which consists in fashioning a workpiece to form a link body of redetermined form, passing portions of said body around a mounting strand and securing the same to said strand,

40 with that portionof the links on the strand in abutting relation.

5. The herein described method of manuf acturing stringers comprising a mounting strand with a plurality of independent. links mounted on and secured to said strand, which consists in fashioning a workpiece to form a link body of predetermined form, passing portions of said bod around a mountin strand and securing t e same to said stran which that portion of the links on the strand in abutting relation, and arranging the links on said strand in groups spaced apart and coupled together by said strand.

6. The herein described method of securin a plurality of links to a mounting stran which consists in feeding a wire into amachine, severing the wire to form a workplece of predetermined length, and fashioning said workpiece to form a link having strand encircling portions, placing said portlons on the strand and firmly compressing'the same thereon to fixedly attach thelink to the strand and to retain the sameagain st displacement therefrom.- a

herein'described method of secur- 'ke members thereo the class describ ing a plurality of links to a mounting strand 7 which consists in fashioning a workpiece from a metallic stri bending the workpiece centrally to form a lbop, arranging a mounting strand adjacent and between the end portions of said workpiece, fashioning the ends of said workpiece to wrap the same around ends onto the strand to retain the-same against displacement therefrom and to leave the central loop ortion of the workpiece project ing radial y from said strand, and securing a similar workpiece to the strand in an adjacent and abutting relation withreference to the first named workpiece and with the loop portion thereof in spaced relation to the looped portion of the first named workpiece.

9. The herein described method of manufacturing the cou ling links of strin ers of the class, describe whlch consists in coding a metal strand into a machine severing a workpiece from said strand, bending. the central portion of the workpiece to form a comparatively large. loop therein, fashioning the ends of said workpiece to form smaller'loops, moving the looped 'ends into opposed relation and then bringing said looped ends together and fashioning the same to form ringlike members thereof arranged in abutting relation to each other and wit-h the openings of said ring-like members in common axial alinement. v v

- 10. The herein described method of .manu

facturing the coupling links of strin ers of tion and then bringing said looped ends tothe same to form ringarranged in abutting relation to each other and with the openings of said ring-like members in common axial alinement and forming a laterally offset portion in the firstnamed loo a 11. The herein describe method of manufacturing the cou ling links of strin 'ers of which consists in ceding a metal strand into a machine, severing a ether and fashioning 85 said strand and, compressing said wrapped memes workpiece from said strand, bending the central portion of the workpiece to form a comparatively large loop therein, fashioning the ends of said workpiece to form smaller loops, moving the looped ends into opposed relation and then bringing said looped ends together and fashioning the same to form ring-like members thereof arranged in abuttingrelation to each other and with thg openings of said ring-like'members in common axial alinement, and compressing the strand intermediate the first and second named loops to form a reduced neck portion 12. The herein described method of fashioning the links of stringers of the class described which consists in employing a strip of wire, cutting off a predetermined length of the wire to form a workpiece, fashioning the. ends of said workpiece to form open loops, then fashioning the central portion of the workpiece to form a comparatively large loop memberand to bring the looped ends into opposed relation, and then moving the looped ends toward each other to overlap the same and then closing said looped ends to form ring-like bodies, the openings of whichare in common alinement.

13. The herein described method ot manufacturing stringers of the class described which consists in feeding a. wire into a ma-- chine, cutting ofipredetermined lengths of wire to form independent workpieces, forming open loops at the ends of said workpieces, then moving said looped ends into'opposed relation and forming a comparatively large loop centrally of said workpiece in this op- 'eration, arranging a mounting strand intermediate the opposed ends of the workpiece,

moving said loopedends toward each other, passin the loops over said workpiece in crosse relation and compressing said looped ends onto said mounting strand to secure the same against displacement therefrom,

14. The herein described method of manufacturing stringers of the class described which consists .in feedinga wire into a machine, cutting'ofi predetermined lengths of Wire to form independent workpieces, forming open loops at the ends of said workpieces,

then moving said looped ends into opposed relation and forming a comparatively large loop centrally of said workpiece in this operation,arranging a mounting strand interme- 'diate the opposed ends of the workp1ece,mov-

ing said looped ends toward each other, passing the loops over said workpiece in crossed relation and compressing said looped ends onto said mounting strand to secure the same against displacement therefrom, and "com-Q pressing that part'of the workpiece intermediate the central loop and said looped ends, to aid in securing the workpiece to said strand and to form a substantially circular'body of 7 said central loop.

'15. The herein described method of manufacturing stringers 0f the class described crossed relation and compressing said looped ends onto said mounting strand tojsecure the same against displacement therefrom,

compressing that part of the workpiece intermediate the central loop and said looped ends to aid in securing the workpiece to said strand and to form a substantially circular body of said central loop, and then fashioning and mounting a similar work ie'ce on the strand in an adjacent and abutting relation to the first named workpiece.

16. The herein described method of manufacturing stringers of the class described which consists in feeding, a wire into a machine, cutting ofl' predetermined lengths of wire to formindependent workpieces, forming open loops at the ends of said workpieces, then moving said looped ends into opposed relation and forming a comparatively large loop centrally of said workpiece in this operation, arranging a mounting strand intermediate the opposed ends of the workpiece,'moving said looped ends toward each other, passing the loops over-said workpiece .in crossed relation and compressing said looped ends onto said mounting strand to secure the same against displacement therefrom, compressing that part of the workpiece intermediate the central loop and said looped ends'to aid in ,securing the workpiece to said strand and to form a substantially circular bodyof said central loop,- thenfashioning an mounting a similar workpiece on the strand in an adjacent and abutting. relation to the first named workpiece, and feeding the finished and mounted workpiece and said strand into position to permit of the mounting of the next successive workpiece on said strand.

17. The herein described method of manufacturing stringers ofthe class; described which consists iii-feeding a wire into a machine, cutting ofi predetermined lengths of wire to form independent workpieces, forming open loops at the ends of said workpieces,

then moving said looped ends into opposed relation. andforming. a comparatively large loop centrally of saidworkpiece in thls operation, arranging a mounting strand intermediate the opposed ends of the workpiece, moving said looped ends toward each'other,

passing the loops over said workpiece in crossed relation and compressing said-looped ios ends onto said mounting strand to secure the I same against displacement therefrom, com- I sections one from the other..

pressing that part of the workpiece interme diate the central loop and said looped ends to aid in securing the workpiece to said strand andlto form a substantiall circular body of said central loop, then ashioning and mounting a similar workpiece on the strand in an adjacent and abutting relation to the first named workpiece, feeding the finished and mounted workpiece and said strand into position to permit of the mounting of the next successive workpiece onsaid strand, and intermittently advancing the strand through the machine for a short disstance without applying workpieeesthereto to form independent stringer bodies consisting of a plurality of links formed from said workpieces and arranged on said strand.

factoring stringers of the class described which consists in arranging a mounting strandin chine, feedlng a strip of wire into the ma chine, fashioning said strip to form a link member comprising a projecting ring body and parts encircling sald strand, securing amultiplicity of said link bodies to said strand in abutting relation to form groups consist ing of a plurality. of said link bodies and inter mittently advancing the strand to form blank intervals which subdivide said link 19. The herein. described method of manufacturing stringers of the class described -which consists ,in arranging a mounting strand in predetermined pos1t1on in a ma chlne, feeding a, str1p of wire into the ma- 7 chine, fashioning said strip to form a link member comprismg a projectin ring body and parts encircling said stran securing a multiplicity of said link bodies to said'strand in abutting relation to form groups consisting of a plurality of said link bodies and intermittently. advancing thestrand to form blank intervals which subdivide said link 1' sections one from the other and forming la-terally offset portions centrally of the outer ends of the loops of said links.

' In testimony that I claim the foregoing as my. invention I have signed 2nd day of May, 1928. a v LOUIS H. MORIN.

18. The herein described method of manu-,

redetermined position in a -ma-- my name this