US1158771A - Shoe-sewing machine. - Google Patents

Description

H. A.-BALLARD.

SHOE SEWING MACHINE.

APPLICATION FILED MAR.24. 19x1.

1 ,1 58,771. Patented Nov. 2, 1915.

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' I APPLICATION FILED MAR.24, 191]. 1,158,771.

Patented Nov. 2, 1915.

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COLUMBIA PLANOURA'PM 60.,WAsHINuTON D c H. A. BALLARD.

SHOE SEWING MACHINE.

- APPLICATION FILED MAR. 24, IQII. 1,158,771.

Patented Nov. 2, 1915.

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H. A. BALLARD. SHOE SEWING MACHINE. APPLICATION FILED MAR. 24, 1911.

Patented Nov. 2, 1915.

6 SHEETSSHEET 4.

H. A. BALLARD.

SHOE SEWING MACHINE.

APPLICAHON FILED MAR. 24. 191l- 1,1 58,771 Patented Nov. 2, 1915.

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Z0 Zizwaeeg Invem%0ru COLUMBIA PLANOGRAPH c0., WASHINGTON, D4 6.

H. A. BALLARD. SHOE SEWING MACHINE.

I I APPLICATION FILED MAR.24. 19H. 1,158,771. Patented Nov. 2, 1915.

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COLUMBIA PLANOORAPH '50.. WASHINGTON, D. c.

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,nAaRIn A. 'LBALLAR-I), or BosToN, MASSACHUSETTS, {ASSIGNOR To Tnn BOYLSTON MANUFACTURING COMPANY, or SOUTH BOSTON, MASSACHUSETTS, A CORPORATION OF NEW JERSEY.

SHOE-SEWING MACHINE.

chines, and its purpose is to provide instrumentalities for improving the step-by-step feeding operation and for holding the work securely during the intervals between the feeding steps.

The invention is illustrated in connection with a chain-stitch machine, and the various instrumentalities in which the invention is embodied are especially adapted to so-called turned work, butthey may also be used when attaching welts to so-called welt shoes. y

Of the accompanying drawings which 7 represent one adaptation of the invention:

Figure 1 represents the group of instrumentalities which act upon the work to feed the same and to form the stitches. Fig. 2 represents two coactive Work-engaging mem bers, one of which engagesthe inner side of the between substance, and the other of which engages the outer side thereof to clamp and feed the work. Fig. 8 represents the member which engages the inner side of thebetween substance, and a member which engages the outer side of the between substance to hold the work stationaryduring the intervals between the feeding steps. Fig. 41 represents the group of instrumentalities. shown by Fig. 1, in different positions. Fig. 5 represents the members shown by Fig. 2, with the needle in the work. Fig. (3 represents one of the members, included in Fig. 3, for holding the work stationary. Fig. 7 represents a horizontal section of a portion of a shoe-sewing machine, the instrumentalities which engage the outer side of the work being shown in plan. Fig.8 represents a vertical section indicated by the line 8-8 of Fig. 7. Fig. 9 represents a side elevation of'the two instrumentalities which engage the outer. side of the between substance. Fig. 10 represents a side elevation,

partly in section, of a chain-stitch shoey sewing machine provided with the instruinentalities illustrated by the preceding figures. Fig. 11 represents areverse side elevation of the machine shown by Fig. 10.

Specification of Letters Patent.

Application filed. March 24, 1911.

Patented Nov. 2, 1915.

Serial No. 616,562.

Fig. 12 represents a side elevation of the two members which engage the outer side of the between substance, and the member which engages the inner side thereof. Fig. 13 represents a front elevation of a laterally movable feed carriage and its operating mechanism. Fig. 1& represents a front elevation of the group of instrumentalities which act upon the work. Fig. 15 represents an elevation of a swinging member provided with gear teeth for engaging the needle holder, and with a cam for actuating the channel guide. Fig. 16 represents .a rear vertical section of mechanism for locking the work rest and the auxiliary work rest. Fig. 17 represents a section on line 1717 of Fig. 16. Fig. 18 represents an elevation of devices for expanding the split ring shown in Fig. 17. Fig. 19 represents a lever for actuating the devices shown in Fig. 18. Fig. 20 represents a movable hanger for the lever shown by Fig. 19. Fig. 21 represents an elevation of devices by which the main workrest is locked. Fig. 22 represents a section on line 2222 of Fig. 21, including additional. elements. Fig. 23 represents a vertical transverse section through the needle and channel-guide mechanism, the plane of the section intersecting the axis of the needle holder, viewed from rear to front.

The same reference characters indicate the same parts wherever they occur.

The machine to which the present invention is adapted is provided with a curved, hooked needle 10 which, being arranged for sewing welts and turned work, enters the between substance of the boot or shoe from the outer side and emerges from a channel formed in the sole. A sole is indicated at 11, and a last at 12. The sole is channeled at 13 to form a flap 1%. The outer edge of the sole israbbeted to form a shoulder 15 and a feather 16. When the work is in position for sewing. it is arranged so that the needle will enter the between substance in the angle formed by the shoulder 15 and feather 16. V i

The member 17, which is adapted to enter the channel 13 and engage the inner side of the between substance, is usually termed a channel guide or opener. It raises the flap ing to well known construction.

vrhilc gripping the between substance, to feed the work. V

The member 18 is arranged to engage the outer side of the between'substance. This member (see Fig. 1 1-) is oppositely disposed to the member 17 and is movable laterally in 'unison with the member 17 for feeding the work. The members 17 and 18' have relative movement toward and from each other so that they may clamp the between substance prior to their feeding movement and 'the backward and upward pull of the needle and thread, by their engagement with said stitch-receiving flange and offset portion; Said flange and offset portion are thus held so that the needle and thread cannot pull them away from the shoulder 15 and feather 16 ofthe insole. The finger 18 engages the work in advance of the needle and the finger 18 engages the stitched portion ofthe work, sufficient space being provided between" the fingers for the needle and thread, 7

The back rest, sometimes termed abunter, is indicated at 19. An auxiliary back rest is provided in the form of a pointed workengaging member 20 which is mounted in a holder 21. The member 20 has a series of points (Fig. 7) which coact with the stitchreceiving flange-of the upper on the line of the stitches but in advance of the stitches. Thismember has a relatively broad under surface which bears upon the offset: portion of the upper which. connects the stitch-receiving flange with the body of the upper and which presses said offset portion against thefeather 16 of the insole. This member 20 tucks the pulled'over portion of theupper into the angle formed by the feather 16 and shoulder 15 of the insole, and the upper: is thus formed-in, as it were, in advance of the stitches. In addition to serving as a forming-in tool, the member 20 servesto hold the-work stationary while the feeding elements 17 and 18 are disengaged from the work and moving back for a fresh hold uponthe work. The holder 21 is mounted so as to be movable toward and from the work andis provided with operating mechanism whereby the pointed member is. retracted prior'to the'b'eginning of the assistance from the needle.

feed stroke of the feeding elements, and is advanced into operative-engagement at the end of' the feed strokeand'before the return stroke of the feeding elements.

The hunter 19 is, as *usual, arranged to be engaged by the shoe upper and is provided with spring-tension means forfladva'ncing it toward the work and with means for' lock- 1 ing it and releasing it at the desired times.

In the machine illustrated, the needle, as well as the members 17 and 18, is laterally movableand is operated to feed the work in conjunction with the members 17 and 18. The invention, however,-.is not limited to machines in which the needleismoved toSo feed thework, because the membersl'T and 18 are adapted to feed the work without any In this form of machinethe members 17 andx18'and the needle are all mounted upona laterally movable carriage so that they move-laterally in unison.

The needle is affixed in a holder 22, and the holder is pivotally mounted uponla stud 23 in a carriage 2 1. The carriage is laterally movable in guides 25 on-the frame of the machine. (See Figs. 10 male) The carriage is reciprocated. by a lever 26'and cam 27, the cam being mounted upon a main power shaft 28, and the lever havinga roll 29 cooperating with the cam. The-lever is mounted upon a fulcrum stud 30 and is con nected with thecarriage by a stud 31. The lever and carriage are .slotted as indicated at 32 and 33 so that the stud 31 may be adjustedto vary the length of strokeiinparted tothe carriage. This mechanism and the greater partof the mechanism hereinafter described is similar to that illustrated and described in U. S. Letters Patent 1,125,038, granted January19, 1915.

The needle holder 22.is provided" with gear teeth 34: which are engaged by gear teeth35 (see Fig. 11) on a segmentalmember 36 which, is mountedto swing abouta-llO stud 37 in the frame of the machine; The

member 36 is oscillated by aneccentric rod 38,0ne end of which engages an'eccentric 39 on the main shaft 28. The eccentric rod is connected to themember 36 by connec- 1 15 tions indicated at 10. The teeth 34: of the needle holder slide laterally. with relation to thoseof the member 36 whenthe carriage 24 is moved laterally; but the teethhave suflicient-width to maintain operative engagement. g V

The member 18 is formed with a shank 41 (see Figs. 7, 8 and 9) which occupies a socket in a holder 42. A setscrew 43, thread- 7 ed in the holder, engages the shank to secure the same, one side of; the shank being flattened, as shown by Fig. 8, to preventturning thereof. The holder 42 is fitted to slide longitudinally of the shankl ina depending portion 24: of the carriagefZi, thepor The holder is engaged by a pin d affixedat the lower end of a lever 46, the carriage portion 24 and the holder 42 being slotted for the reception of the pin, as shown by FigsJ7, 8 and 9. The lever 46 (see Fig. 10)" is mounted upon a fulcrum stud 47 in the frame of the machine, and its upper end -'subject to the tension of a spring 48 by .1. with a cam on the shaft 28.

.which the holder is normally advanced toward the work. The lever .46 is provided with a roll t9 which is held in engagement The cam effects the retraction of the holder at the desired time. When the feed carriage is moved backward or forward, the holder slides along the pin4t5.

The channel member 17, which coiiperates with the member 18 to clamp and feed the work, is afiixed to a holder 51 '(see Fig. 11), which holder is mounted in the'carriage'24- .so as to be movable about the needle axis .which carries the needle holder. The member 36 which operates the needle holder also serves to operate the holder 51 which carries the channel member 17. For this purpose the holder 51 is provided with an arm 52, at the free end of which is a stud 58. This stud extends through a roller or bushing 5% (see Fig. 15) which occupies a cam slot 55 in the member 36. The roller 5&- is provided with flanges, such as that indicated at 56, by which it is retained in cooperative relation with the member 36, the stud 58 being adapted to slide back and forth through the roller when the feed car riage 2% is moved. The arm 52 is braced by a plate 57 afiixed to the carriage 2 The cam surfaces on the member 86 cause the channel member to move toward the member 18 when the needle is advancing toward the work, and to rececle from the member 18 when the needle'is receding from the work. The action of the channel member is positive, but the coaction of the member 18 is yielding, being caused by the spring 4L8. The member 18 is held forward at all. times except during the return stroke of the carriage 2t preparatory to feeding thework.

The pointed member 20, by which the work is held stationary during the brief interval when the members 17 and 18 are re leased from the work, is held forward by the spring 58 (see Fig. 11) connected with a carrier 59 towhich the holder 21 is affixed. The carrier 59 is mounted upon parallel oscillatory links 60 and 61. The link 60 is affixed to one end of a rock shaft 62 mounted in bearings at the rear of the frame, and the link 61 is mounted upon a pivot stud 63 near the front of the frame. Therock shaft 62 is provided with a friction drum 6d (see Figs. 16, 17 and 22) by which the pointed work-engaging member is locked in its for ward position and by which it'is retracted prior to the feeding of the work. This mechanism is in all respects similar to that described in said Letters Patent 1,125,038. A pin 65 is used to fix the drum 6% on the rock shaft. An annular groove 66, formed in one side of the drum, is occupied by a split ring 67. The split ring normally tends to free itself from the friction drum, but its ends are adapted to be forced apart so as to expand it against the outer flange of the drum. 3

Figs. 18 and 22 illustrate a member by which the split ring is expanded. This member, hereinafter termed a controller, 18 indicated at 68. It is provided with a square boss 69 and with parallel fingers 70 having confronting parallel faces adapted to receive a sliding block 71; The block receives a pin 72 aflixed to abell-crank lever 73. The square boss 69 occupies the space in the groove 66 between the ends of the split ring. (See Fig. 17). The bell crank 73 is mounted upon afulcrum stud 74c and is provided with a cam roll 75 which cooperates with a cam 76 (see Fig. 10) on the main shaft 28. The action of the bell crank, due to the cam, throws the controller 68 first in one direction and then in the other, causing the square boss 69 to first expand the split ring 67 and then to turn the same about the axis of the rock shaft 62. Yielding stops 77 and 78 are arranged in the path of the controller 68 and are adapted to be engaged by the lower end of the controller to insure the expanding and releasing of the split ring. The stop 77 is pivotally mounted on a stud 79, and it is held against a setscrew 80 by a spring 81. The stop 78 is pivotally mounted on a stud 82 and is held against an abutment 88 by a spring 84. The stop 77 effects the release of the split ring so that the pointed member 20 may be held in operative position by the spring 58. The stop 78 insures the expansion of the split ring so that the pointed member may be retract by the action of the bell crank 73 The main work rest or bunter 19 carries gear teeth in the form of a rack, indicated at 85 in 10. This rack co'ciperates with a pinion 86 (see Figs. 16 and 22) formed upon a sleeve 87. The sleeve is loosely mounted on the rock shaft 62. A clock spring 88 tends to hold the work rest toward the work, one end of the spring being attached to the sleeve, as shown by Fig. 16, and the other end being attached to any suitable fixture or portion of the frame.

A friction drum 89, similar to the drum 6%, is fixed to the sleeve 87. The drum 89 is likewise" formed with an annular groove scribed. The controller therefor is indicated at 90. (See Figs. 21 and 22). This controller has a square boss 91 forexpanding the split ring, and has a circular boss 92 which is surrounded by a plate or link 93. V The link is also engaged with a stationary. stud 9 1' by which the square boss 91 is 131'6'.

vented. from moving about the axis of the rock shaft 62. r r The member has a finger 95 which is periodically engaged and disengaged by a lever 96, the finger 95 curving about the stud 7 2 so as to permit the latter to operate without interference.

The lever 96 is mounted upon the stud 7 4 and is moved in one direction by a spring 97. A follower 9.8- is interposed between the spring and the lever 96, the spring and folr the drum being held against rotation by the link .93. In this way the work rest 19 is normally locked in operative position.

. cam 100 (see Fig. 10) serves to retract the lever 96 to effect the release of the friction drum 89. For this purpose the lever 96 is provided with an ear 101 which stands in the path of the cam 100 and by which the lever is retracted againstthe force of the spring 97.

The foregoing explanation of the manner in which the members 19 and 20 are locked and released relates to the operation when the machine is being driven forward to sew. By a somewhat similar operation the members 19 and 20 may be released at the completion of the sewing operation and the member 20 may be retracted, all of which is effected by manually turning the main shaft 28 in the reverse direction through a fraction of a revolution. For this reason the pivot stud 74 which carries the levers 73 and 96 is mounted in a movable hanger 102. (See Figs. 1.0 and 20). The hanger is secured to theframe by a pivot stud 103. One arm of the hanger carries a pawl 10% which is held by a spring 105 against a disk 106 on the shaft 28, said disk having a single ratchet tooth 107. The tension of the spring105 also positionsthe hanger, the latter being provided with a nose 108 which is normally held against the frame, as shown by Fig. 10. When the power-shaft is being driven forwardly, as indicated by the arrow in Fig. 10, the hanger 102 remains motionless, but when at the completion of a sewing operation the shaft is rotated in the reverse direction, the tooth 107 abuts againstthe end of the pawl 10% and rocks the hanger 102 against the tension of the] spring 105. This movement of the hanger, carries the pivot stud '74 toward the front of the machine, and in this waythe levers 7 it and 96 areactuated torelease the splitrings I in the drums 6 1 and 89. At the same time, 7 a finger 108 at the lower end of the hanger 102 engages an ear 109 on the periphery of the drum 6-1, thus turning the drum -to re.

tract the member 20 from the work- The-j hanger 102 carries a pin 110 which engages a leverlll forming a part of thread clamp ing mechanism indicated generally at 112; The effect upon'the thread-clamping mechanism is to release the tension, upon the thread 113 which supplies'the needle. The

tooth 1017 by which the thread is released,-

by which the main work rest is unlocked and by which the pointed member QO isr'e? tracted, is so-positioned with relation tothe other cams as to act when'the member 18 is retracted and when the needle and channel .member are retracted. .All of the instru mentalities which actupon the work are thus retracted at the same'time, so that the work may be freely inserted and removed.

I claim: 1. In a shoe-sewing machine, a curved hooked needle, an oscillatory holder therefor, a laterally movable carriage forsaid holder, said holder being mounted on a pivot stud in said carriage, means for op-- erating said holder, meansfor operating said carriage to feed the work, a work-engaging member mounted in said carriage so as to be movable toward and from the work, said member being adapted to bear against the outer side of the between substance, yielding means for causing saidmember to brace the between substance against the stressof the needle, and means adapted to engage the outer side of the between substance and brace the same rigidly.

2. In a shoe esewmg machine, a curved hooked needle, an oscillatory holder there for, alaterally movable carriage for said holder, .said holder vbeing mounted on a pivot stud 1n said carriage, means for openating saldholder, means for operatlng. said 3. In a shoe-sewing machine, stitch-forming mechanism including. a needle, a mov-. able back rest arranged to coact with yieldg ing pressure with the outer side of the between substance 1n advance of the needle,

means arranged. to lock said back rest intermittingly in work-engaging position, means arranged. to grip the between substance between said'back rest and the needle, and means arranged to move said gripping means to feed the work.

.4. In a shoe-sewing machine, an oscillatory hookedneedle, a member for engaging the outer side of the between substance, said member being movable, toward and from the work, means for holding said member rigidly in work-engaging position to resist stresslupon the work, said .means being adapted to periodically release said member, and two cooperative members adapted to engage respectively the inner side and the outer side of the between substance, means for causing said cooperative members to clamp and releasethe between substance, and means for moving said cooperative members laterally to feed the work.

5. In a shoe-sewing machine,stitch-forming mechanism, means arranged to tuck the upper into the angle of the shoulder and is held against the shoulder of the insole by said tucking means and before the needle enters the between substance, said gripping means being movable laterally while gripping, to feed the work.

7. In a shoe-sewlng machine, stitch-forming mechanism lncludmg a needle and oper ating means therefor, means arranged to tuck the upper into the angle of the shoulder and feather of the insole'in advance of the needle, and means arranged to grip the between substance between said tucking means and the needle while the upper. is heldagainst the shoulderof the insole by said tucking means, and before the needle enters the between substance, said gripping means being movable laterally while gripping, to feed the work.

8. In a shoe-sewing machine, stitch-forming mechanism including a needle and operating means therefor, work-feeding means including coacting gripping members an.

ranged to grip the between substance and move laterally while gripping, and means arranged to tuck the upper into the angle of the shoulder and feather of the insole in advance of the needle after each feed movement and before said grippingmembers relax their hold upon the between substances,

said gripping members being arranged to take a fresh hold upon the between substance between said tucking means and the needle While the upper is held against the shoulder of the insole by said tucking means.

9. In a shoe-sewing machine, stitch-forming mechanism including a needle and operating means therefor, two work-engaging members arranged respectively at opposite sides of the needle to brace the work against the stress of the needle, the one of said members which engages the work in advance of the needle being formed and arranged to tuck the upper into the angle of the shoulder and feather'of the insole, and means arranged to grip the between substance between said-tucking member and the needle while said tucking member is holding the upper in said angle, said gripping means being movable laterally while gripping, to feed the work.

10. In a shoe-sewing machine, means for feeding thework step by step, a work-engaging member having a point arranged to pierce the stitchreceiving flange of the upper, to tuck said flange into the angle of the insole, and means for moving said member to, and from coactive engagement as aforesaid to steady the work between the feeding steps. 3

11. A work-engaging member having a point for piercing the stitch-receiving flange of the upper, and having a relatively broad surface for bearing upon the offset portion which connects said flange and the body of the upper, and operating means for causing said member to coact with the said flange and offset portion between feeding steps to steady the work and tuck the upper into the angle of the insole.

12. In a shoe-sewing machine, laterally movable means for feeding the work step by step, operating means therefor, a workengaging member having a flat under surface and a pointed end, said member being movable downwardly toward the work and upwardly from the work so as to place said flat surface upon the feather of the sole and to cause said pointed end to pierce the; outer side of the between substance, and operating means for causing said work enga ging member to engage the work at the end of each feeding movement and to release the work prior to the beginning .of; each feeding movement.

13. In a shoe-sewing machine, an oscillatory hooked needle, two movable members adapted to engage the outer side of the between substance at the right and left respectively of the needle, means for causing one of said members to act upon the work with yielding force, means for rigidly holding the other of said members in work-engaging position, amember adapted to engage the inner side of the between substance in cooperative relation to the yielding member to clamp the between substance, and

means for imparting lateral feeding movement to the cooperative clamping members,

said holding means being adapted to release rigid, means for moving said clamping members laterally to feed the work, means for retracting the outer member from the work prior to return lateral movement, and

a member adapted to rigidly engage the outer side of the between substance when said yielding member is retracted to hold the work stationary.

15. In a shoe-sewing machine, two mem-' ibers adapted: to engage respectively :the in ner side and the outer side of the between substance, the inner one of said members being movable laterally for feeding, a second member-forengaging the oute'rside of the between substance, said second member being movable laterally and towardand-from said inner member to cooperate'with the inner member to clamp and feed the work, the first of said outer members being movable toward and from the work, and means for causing said first member to recede from the work preparatory to feeding movement, and to return to and remain in worleengaging position to hold the work clamping members are open. is 16. In aninseam-sewmg machine, means arranged to feedthework step by step, a

work-engaging member having one or more teeth arranged to indent the outer side of the stitch-recelvmg flange of a shoe upper,

ing force, means arranged to lock said worl engaging member intermittingly against retractory movement, and means arrangedto stationary I throughout the period when said cooperative 4o arranged to alternately engage" and 'disen-Q gage the workto tuck the upper into the angle of the shoulderand feather of them- 'sole in advance of the needle, andImeans-arranged to alternately-engageand disengage the work-to press theupper against said shoulder between said tucking means "and theneedle, said pressing-irieans being movable laterally with the needle while pressing the upper as aforesaid, said tucking means and said pressing means ibeing arran ed to 'kee the un er ressed continu- 2: P a p g ously against said shoulder. I r

-18. In'a shoe-sewing machineystitchlforming mechanism including n'eedle, means arranged to gripthe between sub stance in advance of' the needle, means 1 ar- .ranged'to move said gripping means tofeed the workaa. back rest arrangedto coaetwith the outer side of the between: substance "in advance of the needle,- and means'arranget to move said back rest intermittin l toand from thebetween substancetovholdtheiiiork stationary between feeding movements-and to free-the work for feeding.

19. In ashoe-sewing machine, stitchforming mechanism ;1nelud1ng a needle,

means arranged to grip the between substance in advance of the needlegfmeans aradvance of said grippingmeans,and'means arranged to move saidback rest intermit tingly to and from thefbetween;substance to hold the work, stationarybetween feeding movements and to free the work for feeding.

In testimony whereof l have affixed -my signature, in presence oftw'o witnesses; means arranged to move said work-engag- I ng member against sald flange with yield- HARBI-E a. "BALLARD.

WVitnesses: V a Y CI-IARLESS. JOHNSON, M, E. CArEN.

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