US1482619A - Shoe-sewing machine - Google Patents

Description

Feb. 5 1924 J. H. REED SHOE SEWING MACHINE E M U l 1141; hyfljm/a/L @w%%% 4 Sheets-Sheet 1 I, j mcuaq filillllllnllqll Filed Jan. 22 1921 Feb, 5 1924., 11,482,619 J. H. REED SHOE SEWING MACHINE Filed Jan. 22 1921 4 Sheets-Sheet 2 I I m/Emmy:

Feb. 5 1924.. 11,482,61LQ v J. H. REED 4 sheets sheet 5 J. H. REED SHOE SEWING MACHINE Feb 5 1924.

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SHOE-SEWING resonant;

Application and January as, dean. tleiial in. crease To all whom it may concern:

Be it known that l, JAMES H. Rani), a c1t1- zen of the United States, residing at Swamp- Scott, county of Essex, State of Massachuasetts, have invented a certain new and use full Improvement in Shoe-Sewing h/lachinm,

of which the following is a specification, reference being had therein to the panying drawungs. v

My present invention has for its ob ect a new and improved shoe sewing machine intended for use in the manufacture of the novel. shoes shown and described in my copending application, Serial No. 439,254 filed January 22, 1921, in which there is a lock stitch seam formed by two threads. the seam being located inside the shoe. Heretofore, in the manufacture of shoes and particularly so-called McKay shoes, the sole has been stitched to the upper and the insole by a seam located inside the shoe and therefore it has been customary to use a chain stitch sewing'machine. The sewing machine embodying my invention sews a lock stltch seam and ha a straight barbed needle, and a shuttle-supplying a shuttle thread on one side of the shoe while on the interior of the shoe there is a cooperating horn and an oscillating looper supplying a 'cop thread. The horn and looper are of such construction that they can operate in the constricted space inside the toe of a boot or shoe. A tales-upv for cop thread is also provided, and this is sutliciently powerful to sink the locks of the stitches to the desired depth in the outsole.

lit will be seen from an examination of the drawings that no stitch spreader or loopiorming mechanism is employed for the shuttle 'thr and that the shuttle itself, which is of a novel character, performs these functions. This results in great simplification of the machine and consequently in more eilicient operation and less expensive mechanical construction.

While I have shown the machine embodying my invention as constructed for use in sewing the main seams of shoes of the hind described, it is also capable of use in many other places as for instance for stitching alon the shanks on the inside of shoes of the roodyear welt type, this being a place where the stitching frequently breaks and also be used for other described these two uses for the sewing me- I chine embodying my invention, it do not limit myself to them, a the machine may urposes.

The invention will e .ztully understood from the following description when taken in connection with the accompanying draw- 1 and the novel features thereof will be pointed out and clearly defined in the claims at the close of this specification.

lln the drawings, Fig. 1 is-a side elevation partly in section of the machine embodying my inventlon.

Fig. 2 is a front elevation. i

3 i a face view of the shuttle.

Fig. 4. is an edge view of the shuttle and shuttle casing. Figs. 5, 6 and 7 show successive positions of the shuttle and needle, the teed oint and presser foot being also shown in 1g. it.

Figs. 8, 9, 10 and 11 are details showing the diiilerent positions of the stitch-forming mechanism.

Fig. 12 is a section on line 12-12 0t Fig. 1 showing the take-up. Fig. 13 is a section on line 13-13 of 1 showing the take-up operating mechanism. 2

Referring now to the drawings, there is shown at 11 thebase or frame of the machine, at 12 the horn or work support and 13 the framework of the h The horn is ota size and shape to render it capable of being inserted in the toe of the shoe and is mounted on the base or frame in such manner as to permit it to be turned as the sewing progresses. At It is shown a needle which is straight and barbed. The work which is desi nated A in the drawings is fed by a f point 5. At 6 is shown a shuttle which feeds the shuttle thread 7 and has a book 9 cooperating with the needle in the formationot the stitch. Inside the horn is a looper 8 through which the cop thread 19 is fed and which also cooperate with the needle inthe formation of the stitch. A take-up is shown at 20 (see Figures 1 and 12) and operates on the cop thread. All

,the stitch-torming instentalities are actuated by a main shaft 2'? rotatabl mounted in the framework of the head of the ma chine.

The needle opwating rhechzmz'sm previously stated, the needle 14 is of the straight barbed type and is mounted on ltd illlll with the other working instrumentalities of the machine.

' Work feed.

At 28 is shown a presser ba'rslidable vertically in the head of the machine and carrying at its lower end a presser foot 29 which is secured thereto by screws 30. The workengaging portion of the presser foot is designated 31 (see articularly Figure 5). The presser bar is eld down by the spring 32 and ma be lifted up against the tension of the spring to insert the work by means of a lever 33 actuated by a treadle 34 and intermediate connections. 1

In the lower end of the presser bar 28 is formed a slideway in which is located a feed.

slide 35. The feed slide 35 is actuated by a link 36 pivotally connected at 37 to the lower end of a cam lever 38 actuated by a cam 39 secured to the main shaft 27. The feed slide 35 has ivoted thereto an arm 4 to which is secure the feed point 5. At 42 is shown a spring, one end of which is secured to the feed point arm 4 and the other end of which is secured to the lower end of the resser bar 28. From the foregoing, it willlie seen that the feed point 5 has a pawllike action and slides freely over the work when moved to the left as shown in Figure 5, but when moved to the right will dig into the work and push the work along with it.

. It will also be seen that the height of the presser bar which varies with the thickness of the work will not affect the action of the feed point.

Shuttle and operating mechanism.

The shuttle 6 is of the discoidal type and is carried by a concentrically disposed annular shuttle case 3. On one side of the shuttlecase is a stud 2, as shownin Figure 1, which 1s engaged by a bracket 10 secured to the under side of the frame 13 of the head. A lever or arm 45 is secured to the stud 2, and extends upwardly terminating in a finger 64 which lies in the path of a cam 65.

The cam is mounted on the main shaft 27 and therefo re once during each revolution of the main shaft, the finger 64 is pressed back,

and the shuttlejilted a little so that the position of the plane'bf the ,face ofthe shuttle relatively to that of the needle is chaiiged and .the bottom of the shuttle is brought into the path of the needle, while during the remainmg portion-of the cycle of movement, the

bottom of'the shuttle is back out of the path of the needle. This movement of the shuttle is very slight but assists materially in the formation of the stitch without the use of any 100p spreader or other similar mechanisms; The shuttle case is made in two parts 3 and 3 secured together by a latch 46 to enable the shuttle to be inserted or removed conveniently. The shuttle is oscillated about its longitudinal axis b a shuttle shaft 47 carrying a finger 48 w ich engages a suitable notch 17 in the back. ofthe shuttle,

as shown in Figure 8. The shaft 47 extends rearwardly and is connected with a shaft 49 by means of a sliding universal joint. 50. The shaft 49 is mounted in a bracket 51 and carries a gear 52 which meshes with a gear segment 53 formed on one end of. an arm 54 pivoted at 55 to the frame of the machine. This arm also carries a cam roll 56 which engages the cam groove of a plate cam 57 mounted on the main shaft 27 of the machine. It will therefore be seen that each rotation of the cam 57 produces a complete oscillation of the shuttle 6 regardless of the angle of its face, the chan es in the angle being permitted by the siding universal joint 50.

The shuttle 6 containing the bobbin for the thread has a flange 58 guided in a groove in the shuttle case 3 so that the shuttle can be rotated by the finger 48 without being point It as shown in Figure 3. The hook 9 of the shuttle is of peculiar shape and will be understood by an examination of F igures 3, 4 and 8. The hook 9 is located entirely in front of the plane of the face of the shuttle and extends in a direction circumferentially thereof and substantially concentric therewith. The inside face of the hook 9 is cut away as shown at d in Figures .4 and 8 and by dotted lines in-Fi'gure 3, to form a oove in which the thread can lie, and to mm a recess or clearance for the needle. The shuttle case is cut away on the bottom, as shown at e in Figure 4, to form a loop-receiving gap having at one side a projecting point or hook i which cooperates with theshuttle hook 9 in throwing the loop and which points in a direction op8osite to that of the k of the shuttle. n the back of the shuttle is a spring tension devlce*60 secured by rivets 61 to the back of the shuttle. This tension device is a thin sheet of metal notched or slit, as shownat 63. The shuttle thread passes throu h a hole 64 in the back of the shuttle and t ence through the notch 63 in the tension plate 60. i

It will be understood that in its operation the needle 14 comes up through the work arrow, and the point of the shuttle hook lit) enters the loop as shown in Figure 6. At this time the shuttle case 3 ,is tilted to bring the shuttle hock, which at this time is in its lowermost position close to the shank-of the needle, so that the point of the shuttle hook will be properly positioned to enter the loop.

After the hook has moved a little past the needle, the needle is caused to dip a little, as shown in Fi re 7, so that it releases the loop and permits the shuttlehook, which is now moving upwardly from its lowermost position, to lift the loop from the needle hook without cuttin or fra ing said loop. This movement of t e need e is permitted by the cut-away portion a? previously .referred to, as shown in Figures 3 and 8. This rotation of the shuttle carries the shuttle hook 9 toward and past the point f of the shuttle case, into and through the loop, as shown in Figure 4:, so that these two opposed points cooperate to spread and enter the loop, acting positively to take the latter from the needle hook, insuring the proper entry of the shuttle hook thereinto, instead of merely displacihg said loop laterally in removing the same from the needle, and

avoiding the necessity of a separate loop spreader for the latter purpose, the useof such a loop spreader having heretofore been found necessary in order to render a mechanism of this type practically operative. At the same time, the end 9 of the rib 58 on the shuttle case passes into the groove in the shuttle case, closing the loop-receiving gap in the latter, and thus the loop is prevented escapin between the shuttle and the shuttle case. l will be seen that at this time, the two legs of the loop are separated from each other by the point of the rib g and the point f of the shuttle case 3, the inner leg being entirely confined within the shuttle case. The rotation of the shuttle continues until the shuttle hook has passed its uppermost position, and thereafter as the shuttle hook moves downwardly the tension exerted on the cop thread by the take-up, as will be later described, pulls the loop ofi the righthand side of the shuttle, as viewed in Figures 5-7, and finally as the shuttle completes its rotation out of the shuttle case through the gap e in the side thereof and down upon the work. It will be understood that by this procedure, the shuttle thread has been passed through the loop in thecop thread and the lock of the stitch is formed when the takeup pulls down the stitch.

This co -action of the shuttle and needle in forming the stitch without the assistance of a loop spreader or other similar devices results in part from the novel construction of the hereindescribed shuttle which has its hook formed in front of the plane of its front face, in part from the tilting of the shuttle, and in part from the construction of the shuttle case having a hook which points in the direction opposite to that of the shuttle hook and which assists in open-- ing the loop. All of these important features are believed to be novel.

H mm.

The horn 12 is hollow and of elbow shape, being mounted on a hollow base 66 which has a bearing 112 rotatable on the frame of the machine. The horn is not positively rotated, but can be swung by the operator as he sews'around the edge of the sole, and the hollow base contains and surrounds a porlooper.

The looper 8 is formed on the end of an oscillating shaft 68 carried in hearings in the horn. The looper itself has an eye a (see Figures 8 to 10) and therefore is of the thread-feeding type as distinguished from loopers which engage the thread at a certain- .point of the cycle of operation and are at other times disengaged from it. The looper shaft 68 is drilled longitudinally to provide a passage 69 (see Figure 8), and the thread 19 passes. through the passage, then past the bent portion of the looper, then through the eye n, and thence through the work. At 70 and 71 (see Figure 1) is shown a pair of bevel gears which connects the lower end of the lo'oper shaft 68 with the proximate end of a shaft section 72' which is at an angle to the shaft 68. This shaft section 7 2 is also mounted in bearings in the horn 12. The lower end of the shaft 72 is provided with a bevel gear 73 meshing with a gear 74 mounted on the upper end of a shaft 75. The shaft 75 has at its lower end, a inion 76 engaging a rack 77. The rack 77 is connected to a bell crank 78 ivoted at 7 9 to the frame of the machine. his bell crank is operated by a rod 80 and second bell crank 81, one arm of which is provided with a cam roll 82 operating in the cam groove of a cam 83 on the main shaft 27 From the foregoing it will be seen that the movement produced by the cam 83 causes the looper shaft 68 to oscillate once for each cycle of move,

ment of the machine.

The action of the looper will be readily understood from an examination of Figures 8 to 11 inclusive. 'In'Figures 8 and 9, the

-- rises, the cop thread 19 is caught by the barb and 1s carried up through the work forming the loop, as shown in Figure 11.

The construction of the looper is si'ich that it is contained within the hollow end of the horn and can oscillate without interfering with the needle or striking the work from which it is fully protected by the horn. In practice, the horn is cut away, as shown particularly in Figure 8, to make it easier for the operator to thread up the machine, but this cut-away space is not sufficient to permit the shoe to interfere with the movement of either the looper or the needle.

Takeup.-The takeup 20 (see Figure 12) operates on the cop thread and comprises a laterally oscillating finger located in the space between the gears 73 and 74 which operate ,the looper shaft section T2. It is provided with an eye m through which the thread passes. ThlS take-up is pivoted on a vertical shaft 84 located outside the circumference of the bevel gear 74 and inside the circular housing 85 on which the horn is mounted. The shaft 84 is provided at its lower end with an arm 86 having therein a slot 87. .This slot receives a pin 88 on an arm 89 of a bell crank pivoted at 90, the other arm 91 being connected by a link 92 to a slide 93. The slide 93 is operated by a bell crank 94 pivoted at 79 (see Figures 1 and 13.) The bell crank 94' is operated by a connecting rod 95 connected to one arm 16-ofa rock shaft 96, the other arm of which'97 carries a cam roll 98 which travels in thegroove of a cam 99 mounted on the main shaft 27.

From the foregoing, it will be seen that the takeup finger 20 enters the space between the bevel gears 73 and 74 and is moved out from said space tot-he position shown in dot and dash lines in Figure 12, drawin the cop thread down vigorously and 111 in the lock of the stitclrdeeply into the 0 anne of the sole.

Certain parts of the machine above described are not claimed herein, being cov- .combination, a straight hook needle located ered per se and independently of the needle by the claims of other applications filed by me as follows :-as to the horn, looper, and takeup; Serial No. 491,694, filed August 12, 1921; as to the shuttle; Serial No. 594,457, filed October 14, 1922 as to the shuttle case; Serial No. 595,266, filed-October 18, 1922: and as to the work feeding mechanism; Se-

rial No. 600,224, filed November 11, 1922.

What I claim is 1. A'lock stitch shoe sewing machine having a straight barbed needle and a shuttle to supply the shuttle thread located on one side of the work, and on the other side thereof a horn. pierced at its end for the passage of the needle, and a thread-feeding looper to lay the cop thread in the barb of the needle, said horn being revoluble and said looper being mounted to oscillate therein. 1

2. In a lock stitch sewing machine, in

combination, a straight hook needle located at one side of the Work, and at the opposite side of the work a work support having a looper adapted 'to place a loop in the hook of said needle, means for actuating said needle to draw said loop through the work, a discoidal shuttle and a substantially annular shuttle case therefor located on the same side of the work as said needle, means for turning said shuttle in said shuttle case,

said shuttle having a circumferentially extending hook adapted to enter said loop and take the same from the needle hook, and said shuttle case having in its periphery a loop receiving gap of a shape to-form on said periphery a point extending in a direction opposite to the hook on said shuttle and adapted also to enter said loop as said shuttle hook ismoved toward and past said point, and a takeup for drawing said loop from said shuttle case and down u on the work after said shuttle has passe therethrou h.

3. n a lock stitch sewing machine, in combination, a straight hook needle located at one side of the work, and at the opposite side of the work a rotatable horn having a looper adapted to place a loop in the hook of said needle, means for actuating said needle to draw said loop through the work, a discoidal shuttle and a substantiall annular shuttle case therefor located on the same side of the work as said needle, and means for turning saidshuttle in said shuttle case, said shuttle having a circumferentially extending hook adapted to enter said loop and take the same from said needle hook, and said shuttle case having in its periphery a loop receiving gap of a shape to form on said periphery a point extendin in a direction opposite to the hook on said shuttle and adapted also to enter said loop as said shuttle hook is moved toward actuating said needle to draw said loop through the work, and mechanism, located at the same side of the work as said needle, for taking said loop directly from the needle hook and assin a locking thread therethrough, sai -mecanism comprising an outer substantially annular member having a loop receiving ap in its circumference, a concentrically isposed inner thread carrying member, and means for relatively rotating said members about their common center, said members being provided respectively with cooperating opposed points movable toward and past each other into and through said loop to take the latter from said needle hook as said members are relatively rotated, and said inner member having a portion adapted to close the gap in said outer member and confine'one leg ofthe loop Within the-same until said loop has passed about said inner member.

5. In a lock stitch sewing machine, in combination, a straight hook needle located at one side of the work, and at the opposite side of the work a rotatable horn having a looper adapted to place a loop in the hook of said needle, means for actuating said needle to draw said loop through the work, a discoidal shuttle and a substantially annular shuttle case therefor located on the same side of the work as said needle, said shuttle having a circumferentially extending hook and an annular flange ided on said shuttle case, said flange eing cut away adjacent said hook, and said shuttle case having a loop receiving gap in its periphery and a point extending in a direction opposite the hook on said shuttle, and means for turning said shuttle in said shuttle case to cause said hook to move toward and past said point and through said loop to take the latter from the needle hook, and to cause said flange to close the gap in the shuttle case and thereby confine one leg of said loop within said case until said loop has passed about said shuttle.

6. A look stitch shoe sewing machine in cluding a straight barbed needle, a shuttle,

a shuttle case therefor, means for tilting the shuttle case and means includin a universal joint for oscillating the shutt e.

7. A look stitch shoe sewing machine including a straight barbed needle, a shuttle, a shuttle case therefor, means for tilting the shuttle case and means including a sliding universal joint for oscillating the shuttle.

8. A look stitchshoe sewing machine having a straight barbed needle, a shuttle, a shuttle case therefor, said shuttle case being provided with a pivotal mounting at right-angles to its axis of rotation, a finger secured to said pivotal mounting, means for moving said finger to tilt said shuttle case in proper timed relation to the other workin instrumentalities, and means for oscillating said shuttle including a universal 'oint.

J 9. In a lock stitch sewing machine, in combination, a straight hook needle located above the work, a rotatable horn located below the work and having a looper adapted to place a loop in the hook of said needle when said needle is in its lowermost position, means for actuating said needle to draw said loop through the work, a discoidal shuttle above the work and rotatable about an axis transverse to the path of movement of the needle, said shuttle having a circumferentiallyextending hook which in its lowermost position is adjacent the uppermost position of the needle hook, and means for turningsaid shuttle about its axis to cause said shuttle hook to lift said loop from said needle hook, said needle actuating mechanism operating to dip said needle coincidentally with the upward movement of said shuttle hook.

In testimony whereof I afix my signature.

JAWS H. REED.

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