US2162406A - Shoe sewing machine - Google Patents

Description

June 13; 1939. LEVEQUE SHOE SEWING MACHINE Filed Nov. so, 1957 s Sheets -Sheet 1 June 13, 1939. B. T. LEVEQUE SHOE SEWING MACHINE 3 Sheets-Sheet 2 Filed Nov. 30, 1937 June 13, 1939. B. T. LEVEQUE SHOE SEWING MACHINE Filed Nov. 30, 1957 3 Sheets-Sheet I5 Patented June 13, 1939 SHOE SEWING MACHINE Bernard '1. Leveqne, Wenham, M888 assignor to United Shoe Machinery Corporation, Paterson, N. 1., a corporation of New Jersey Application November :0, 1931, Serial No. 111,243

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The present invention relates to shoe sewing machines and is designed particularly as 'an improvement in certain features of the machine disclosed in applicants .co-pending application Serial No. 10,621, flied March 12, 1935, although the invention may be embodied to advantage in other forms of outsole shoe sewing machines. In the machine disclosed in the application above referred to, the needle and awl are mounted to operate permanently in a fixed plane and the work is fed by means of the presser-foot and work support which are mounted to move in the direction of feed while in clamping engagement with the work. The machine of the application above referred to was designed to run at a high speed as compared with outsole shoe sewing machines in commercial use. and it was found that when operating at this high speed upon certain classes of work, difliculty was experienced in securing a uniform feed without the use of a clamping pressure sufliciently heavy to mar the work. To obviate this diiflculty, the machine has been provided with a work piercing implement to move in the direction of feed while through the work, and supplement the feeding action of the presser 25 foot and work support. The awl is conveniently utilized as such' an implement and a feature of the invention consists in the simple and emcienti stitch may be varied through adjustment of the 35 work feeding devices. The machine is also provided with a work channelling knife and a feature of the present invention relates to connections between the feed adjustment and the channelling knife, whereby the knife, although normally stationary during a sewing operation, is properly positioned with relation to the stitch formingdevices, regardless of the stitch length- Other features of the invention consist of a 45 simple and accurate construction for the stitch forming and work feeding devices, and certain other novel combinations and arrangements of parts hereinafter described and particularly defined in the claims.

In the accompanying drawings illustrating so much of an outsole shoe sewing machine as is necessary for an understanding of the several features of the present invention, Fig. 1 is a view in side elevation, taken in section on a line ll 55 of Fig. 2; Fig. 2 is a View in front elevation; Fig. 3

(Cl. flit-48) is a plan view partly in section, viewed in the y direction of line 33.of Fig. 2; Fig. 4 is a detail view of the stitch forming devices, taken partly in section on line 4-4 of Fig. 3; Fig. 5 is aside view, looking from the left, of the stitch forming devices; Fig. 6 is a detail view similar to Fig. 4, but showing the parts in a different position; Fig.

'l is a detail view of the awl and mounting therefor taken in section on line I-'-'I. of Fig. 3; Fig. 8 is a detail sectional view on line 8-8 of Fig. 3; m Fig. 9 is a section on line 9-9 of Fig. 5; Fig. 10 is a plan view of the forward end of the work support illustrating the position of the work feeding, stitching and channelling devices at the limit of back'feed; andIFig. 11 is a view similar to 15 :Fig. 10 but showing-the parts when adjusted for "a difierent length of feed. I I

The work feeding mechanism illustrated in the drawings is similarto that of applicants pending application in which the work is fed intermittently by the co-operating action of a work support and a presser-foot, the work support and presser foot being arranged to engage respectively with the welt and outsole of a shoe. The pressure-foot is indicated at l 2 and the work sup- 5 port at II. The presser-foot is secured to the forwardly extending arm of a presser-foot lever it and the work support is rigidly secured to an arm IS. The lever I8 is pivotallymounted at on a feed carriage in the form of a slide 22 arranged for advancing and retracting movements in guides 24 and 26. The work support arm I8 is secured to the slide 22. The slide is reciprocated by an adjustable toggle motion which is fully disclosed in my co-pending application above referred to and which may be briefly described as follows: One arm 28 of the togglev is pivotally connected at one end of the slide 22 and at the other end to the other arm 30 of the toggle. The toggle is operated by a reciprocating rod 32. The outer end of the arm 30 is not fixed but is supported on a stud 34 on which is pivoted a hub 36 connected by a web 38 with a bearing I on a stud 42 which lies below the pivotal connectionbetween the two toggle arms 28 and 30. The hub 36 is provided 45 with a gear segment 44 meshing with a segment 46 which is adjustable either manually or automatically by an arm 48. The toggle operating rod 32 is-reciprocated in a definite movement and the extent of reciprocation of the feed'slide is 50 determined by the position of the pivot 34. If the gear segment'is moved in a clockwise direction, the movement of the feed slide is increased, and if it is moved in a counterclockwise direction, the

movement of the feed slide is reduced.

lateral feed motion of the sleeve and awl.

A suitable clamping or locking mechanism, not shown in detail, is associated with the presserfoot lever It to lock the presser-foot on the work during a feeding movement.

The feeding movement of the work late the left, as viewed from above, and in order to assist the work support and presser-foot in feeding the work, the awl is mounted to move in the direction of feed while in the work. The awl is then retracted and the needle enters the work. While the needle is in the work, the presser-foot is released and the presser-foot and work support, as well as the awl, are back fed to place the parts in readiness for the next work feeding operation. The. awl and needle are shown at 50 and 52 respectively. The needle is arranged-to oscillate in a single plane, but the awl is mounted not only for oscillatory motion, but also for a lateral feeding motion with the work support and presserfoot in a manner similar to that described in United States Letters'Patent No. 1,169,909 to Ashworth, dated February 1, 1916.

The operating mechanisms for the needle and awl may be described as follows: An arm I, which is fixed to the work support arm ll, carries a stud 5' which is threaded in a bearing member or sleeve 6' arranged for both lateral and rotary movements within fixed brackets 60 and $2 of the machine frame. The sleeve constitutes a hub for the awl. The sleeve is provided with a semicircular boss or projection 64 from which extends a plate It to which is bolted a clamping plate I, the aw] i. being clamped between the plates 66 and I. Surrounding the sleeve at the left side thereof is a needle guide hub 10 to which the needle guide 12 is attached. The needle segment hub II is journalled on the hub II- and carries the needle segment Ii over a portion of its periphery. Extending outwardly from the hub I4 is a needle clamp I! to hold the .needle 52. From the description thus far, it will be seen that feeding movements of the work support arm I I result in corresponding lateral movements of the sleeve I8 and consequent lateral movements of the awl with the work support and presser-foot.

Rotary motion of the awl is eifected by an awl sector 8. formed on a hub 82 which surrounds the sleeve I adjacent to bracket 82. Projecting from the left-hand side of the hub '2 is a semicircular boss ll which bears against the semicircular projection of the sleeve.

bears against the left-hand end of the projection 84, thereby preventing lateral movement of the needle guide and the needle. It will be seen from Fig. 9 that a space is provided between the projection M of the sleeve and the side of the hub 82, thereby permitting the n The needle and awl segments I6 and I. are operated in the usual manner by oscillating gear segments,

, the operating segment for the awl being illustrated at I in Pig. 1.

To assist in holding the work while the needle is in the work and'the feeding devices are being back fed, the needle guide I2 is brought into contact with the work, as shown in Fig. 6. To this end, the needle guide hub is' connected for operation from the needle hub in a manner shown particularly in Figs. 4 and 6. The needle guide hub II is provided with a depression 92 to receive a detent ball I which is held in an opening of the needle hub I4 by a short leaf spring I! secured to the hub I4 by a screw I. Upon rotation of the needle sector to move the needle into The needle guide hub II is provided with a flange as which the work, the needle guide hub 10 is carried with the needle sector until the guide engages the work, whereupon the ball 94 slips out of the depression 92, so that the needle may continue its movement into the work. while the needle guide is held in contact with the work, as shown in Fig. 6. The needle guide remains in this position during back feeding of the feed devices. Upon retraction of the needle from the work, the ball is reengaged in the depression 92, and the parts are restored to the position of Fig. 4.

The work channelling knife 52 which projects upwardly through the usual opening in the work support is stationary during the stitch forming cycle, but is adapted for a retracting motion in conjunction with the edge gauge, as in the machine of my pending application, and also for a lateral adjustment in the line of feed in order to position it properly with relation to the awl and needle, whenever an adjustment is made in the length of feed.

i For the purpose of the retracting motion, as more fully described in my co-pending application, the work channelling knife is securedin a slide I82 which is movable axially in a knife bracket I M. The bracket I is pivoted at I 06 on a fixed part of the machine. To the slide I I2 is secured a pin Illl received within a slot of a bell crank I I0 which is pivoted on the bracket I. The bell crank is operated by a pin I I2 on an edge gauge retracting lever Ill, the outer end of which has a pin IIi connected with the carriage Ill of the edge gauge I20. The lever H4 is pivoted at I22 and carries at its lower end a cam follower I24 received in the groove of a cam I26 mounted for oscillation ona rock shaft I28. Rotation of the rock shaft I2! in a counterclockwise direction results in simultaneous retraction of both the edge gauge and the channelling knife.

slide adjusting arm 48, when the arm is shifted from the short stitch to the long stitch position, as described in my co-pending application.

The adjustment of the channelling knife for diflernt lengths of feed is accomplished by pivotal movement of the knife bracket I04 about the pivot I06 which, as shown in'Figs. l and 2, is perpendicular to the axis of the knife and so arranged that pivotal movements of the bracket result in adjustments of the knife in the line of feed within the slot of the work support. The bracket I is provided with an arm I" extending below the pivot I00 and-carrying at its lower end'a roller I 32 received in the bifurcated jaws I 34 at the upper end of the bell crank I26. The inner end of the bell crank is formed with a spiral gear I" meshing with a spiral gear I" formed on the hub ll which, as previously described, constitutes a part of the feed adjusting mechanism. It will be seen that clockwise motion of the hub 40 to reduce the length of stitch results in a movement of the channellingknife to the left, and a counterclockwise motion of the hub II to increase the stitch length results in a motion of the knife to the right. The relative positions of the channelling knife, awl and needie for different sewing conditions are shown in Figs. 9, l0 and 11. In Fig. 9, the work support position asin Fig. 9, the needle is in the position formerly occupied by-the awl, and the awl has been moved to a position closely adjacent tothe knife. For along stitch, the positions of the parts at the limit of back'feed are indicated inFig. 1l.

the limit of its back stroke.

means and the knife torposition the knife in the line of feed immediately adjacent the awl at 4-. A shoe sewing machine having, in combination, work feeding and stitch forming devices including a work piercing member movable back and forth in the line of feed, a channel forming knife in the line of feed past which the work is fed; means for adjusting said devices to-vary the length of stitch acting to vary the limit of the back movement of said member while out of the work, and connections between said adjusting means and the knife to position the knife immediately adjacent said work piercing member at the limit of its back stroke.

5. A shoe sewing machine having, in combina- The needle is in the same plane as in Fig. 10, but Work feeding and Smith forming devices. a

the awl, work support and presser-foot are all moved considerably farther to the right. It is,

"by the awl. -is'considerabiy to the right of its position in therefore, necessary that the channelling knife be spaced farther to the right than for the short feeding adjustment to prevent its being engaged In Fig. 11, the channelling knife Fig. 10. This adjustment of the knife is automatically effected by the mechanism heretofore described, whereby a change in the feed adjustment makes a simultaneous lateral change in v the position of the knife. If the adjustment of the present invention were not provided, it would benecessary to set the channelling knife permanently at the position for maximum feedin order to avoid engagement thereof by the awl under any conditions. Such a wide adjustment of the knife, however, would be unsatisfactory for the short stitch condition of Fig. 10, because the channel cut thereby would not accord .with the line of stitching when sewing around curves of short radius. The present invention, therefore, by positioning the channelling knife immedlately adjacent to the awl at the limit of back feed, assures proper alignment of the channel with the line of stitching, regardless of the length of stroke of the work feeding devices.

The nature and scope of the present invention, and a machine embodying the various features in their preferred forms having been described, what is claimed is:

1. A shoe sewing machine having, in combination, work feeding and stitch forming devices including a needle and an awl, at least one of which is movable in the line of feed while engaging the work, a channel forming knife in the line of feed past which the work is fed, means for adjusting said devices to vary the length of stitch, and means for making a corresponding adjustment of the channel knife along the line of feed.

2. A shoe sewing machine having, in combination, work feeding and stitch forming devices, a channel forming knife in the line of feed past which the work is fed, mechanism for adjusting said devices to vary the length of stitch, and connections from said mechanism for simultaneously adjusting the channel knife along the line of feed.

3. A shoe sewing machine having, in combination, work feeding and stitch forming devices including an awl, movable back and forth in the line of feed, a channel forming knife in the line "of feed past which the work is fed, means for, adjusting said devices to vary the length of stitch acting to vary the limit of the reciprocating the work support and presser-foot to feed the work, stitch forming devices including a needle and an awl at least one of which is movable in the line of feed while engaging the work, a work channelling knife, a pivotal support for the knife for adjustment thereof in the line of feed,

adjusting means for varying the reciprocation of the work support and presser-foot, and connections between the adjusting means and the knife support to position the knife with relation to the stitch forming devices in accordance wit 'the length of stitch.

7. A shoe sewing machine having, in combination, a work support, a presser foot, stitch forming devices including a needle and an awl atleast one of which is movable in the line of feed while engaging the work, a toggle mechanism for reciprocating the work support-and presser foot to feed the work, means for adjusting said mechanism to vary the length of feed, a work channelling knife, and connections between the adjusting means and the knife to position the knife with relation to the stitch forming devices.

8. A shoe sewing machine having, in combination, a work support, a presser foot, stitch forming devices including a needle and an awl at least one of which is movable in the line of feed while engaging the work, a toggle mechanism for reciprocating the work support and presser foot to feed the work including an adjustable arm to vary the length of feed, a work channelling knife, and connections between the adjustable arm and the knifeto position the knife with relation to the stitch forming devices.

' 1 9. A shoe sewing machine having, in combination, a work support, a presser foot, means for reciprocating the work support and presser foot to feed the work, stitch forming devices including a needle and an awl at least one of which is movable in the line of feed while engaging the work, a work channelling knife, adjusting means for varying the length of the reciprocating move ments of the work support and presser foot, and connections between the adjusting means and the knife to position the knife immediately adjacent said movable member of the stitch forming devices at the limit of the back feeding stroke.

10. A shoe sewing machine having, in combination, a work support, a presser-foot, means for reciprocating the work support and presser-foot to feed the work stitch forming devices including an awl movable while engaging the work with the work support and presser-foot, a work channelling knife, adjusting means for varying the reciprocating movement of the work support, presserfoot and awl, and connections between the adjusting means and the knife to position the knife immediately adjacent the awl at the limit of the back feeding stroke.

11. A shoe sewing machine having, in combination, work feeding and stitch forming devices including a feed slide, a work support and a presser-foot mounted upon the slide arranged to clamp and feed the work, a needle and awl supporting stud, fixed frame arms in which the stud is mounted to move back and forth with the feed slide, an actuating connection between the stud and slide, a needle and awl mounted upon the stud, and a connection between the stud and awl causing the awl to move back and forth with the stud.

12. In a shoe sewing machine, stitch forming devices comprising a-bearing member mounted for reciprocating and rotary movements, a work piercing member secured to the bearing member, an operating member journaled on the bearing member and having means for rotating the bearing member, a second work piercing member, and a hub therefor on the bearing member.

13. In a shoe sewing machine, stitch forming devices comprising a sleeve mounted for reciprocating longitudinal movements, a work piercing member secured to the sleeve, an operating member journaled. on the sleeve and having means for rotating the sleeve, 9. second work piercing member, and a hub therefor journalled on the sleeve.

14. In a shoe sewing machine, stitch forming devices comprising a sleeve mounted for reciprocating longitudinal movements, an awl carried by the sleeve, an awl segment. having a hub journalled on the sleeve, and means for imparting rotary movements to the sleeve, a needle, a needle hub jouinalled on the sleeve, and means for operating the needle.

15. In a shoe sewing machine, stitch forming devices comprising a sleeve mounted for reciprocating longitudinal movements, an awl carried by the sleeve, an awl segment having a hub journalled on the sleeve, the sleeve having a projection engaged by the hub whereby rotary movements of the awl segment are imported to the sleeve, and reciprocating movements of the sleeve with respect to the hub are permitted, a needle hub on the sleeve, a needle carried by the needle hub, and means for retaining the l awl segment and the needle hub against movement longitudinally of the sleeve.

16. In a shoe sewing machine, stitch forming devices comprising a sleeve mounted for rotary and longitudinal reciprocating movements, an awl carried by the sleeve, the sleeve having a projection ofgenerally semi-circular section, an awl segment journalled on the sleeve and having an extended portion engaging with the projection of the sleeve to impart rotary movements to the sleeve, a needle hub longitudinally stationary on the sleeve, and a needle carried by the needle hub.

1'7. In a shoe sewing machine, stitch forming devices comprising a sleeve mounted for rotary and longitudinal reciprocating movements, an awl carried by the sleeve, the sleeve having a projection of generally semi-circular section, an awl segment journalled on the sleeve and having an extended portion engaging with the projec tion of the sleeve to impart rotary movements to the sleeve, a needle guide hub journalled on the sleeve and having a flange engaging the extended portion of the awl segment to retain the hub and segment against longitudinal movement, and a needle hub journalled on the needle guide hub.

18. In a shoe sewing machine, stitch'forming devices comprising a needle, a needle guide, carriers for the needle and needle guide, means for oscillating the needle carrier to cause the needle to enter the work, and connections to oscillate the needle guide carrier from the needle carrier to engage the needle guide with the work and having provision for thereafter permitting continued movement of the needle carrier.

19. In a shoe sewing machine, stitch forming devices comprising a needle, a needle guide, carriers for the needle and needle guide, means for oscillating the needle carrier to cause the needle to enter the work, and a spring pressed detent connecting the carriers to move the needle guide into engagement with the work and to permit continued movement of the needle thereafter.

20. In a shoe sewing machine, stitch forming devices comprising a needle, a needle guide, carriers for the needle and needle guide, means for oscillating the needle carrier to cause the needle to enter the work, and a detent ball in the needle carrier, the needle guide carrier having a depression to receive the ball whereby the needle guide is moved into engagement with the work by the motion of the needle carrier.

BERNARD T. LEVEQUE.

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