US1894399A - Sewing machine - Google Patents

Description

Jan. 17, 1933. HAZELTON I 1,894,399

SEWING MACHINE Filed Feb. 27, 1930 3 Sheets-Sheet 1 il l'inewr W$M Jan. 17, 1933. G, HAZEL-[ON 1,894,399

SEWING MACHINE Filed Feb. 27, 1930 3 Sheets-Sheet 2 W936 Wr Jan. 17, 1933. e. HAZELTON SEWING MACHINE Fi led Feb. 27. 1930 3, Sheets-Sheet 5 Event qr 7 4 Q2 What;

Patented Jan. 17, 1933 UNITED STA res PATENT GEORGE HAZELTON, OF LEICESTER, ENGLAND, ASSIGNOR TO UNITED SHOE MACHINERY CORPORATION, OF PATERSON, NEW JERSEY, A CORPORATION OF NEW JERSEY SEWING MACHINE Application fi led rebruar 'av, 1930, Serial No.

The present invention relates to sewing machines, and especially, though not exclusively, to sewing machines such as'are used in the manufacture of bags, suitcases and the like.

Machines of this class are employed to stitch together, at the meeting angle, the sides and bottom or top of cases and bags of general rectangular shape, and comprise organizations usually having the general characteristics of the sewing machines shown and described in U. S. Letters Patent No. 1,614,444 granted on January 11, 1927 to R. G. Reid et al., and No. 1,695,718 granted on December 4 18,1928 to F. Ricks et al., and No. 1,707,571

granted on April 2, 1929, to Fred Ricks et al. In sewing suitcases, bags and the like, it is usual to use a comparatively long stitch; it may be a stitch a quarter or even a third of an inch long. When such machines are provided with the step-bystep feed which has lieretofore been used, this long jerky stepby-step feed coupled with the fact that many ofthe bags sewn on such machines are of large size, makes the control of the bag bythe operator relatively diflicult and arduous, as it is fed past the sewing devices of the machine. Further, the large size and consequent weight'of some of the bags puts a severe strain on the work feeding devices owingto the inertia of the bag when 'it'is abruptly moved and equally abruptly stopped in feedin sewing along an end or side of a bag, when the corner of the bag is reached, it is usual for the operator to cutout the feed and put in one or more stitches around the corner of the bag, and in doing so the operator puts in one stitch at a time by causing the machine to make a single revolution, and turns the bag on the corner after each stitch to space the stitches around the corner as desired. It is also usual in sewing certain kinds of small articles, such as cycle tool bags, to start and finish a length of sewing with a few short stitches, say 8 or 10 to the inch, which short stitches help" to preventthe threads from working loose. In bag sewing machines as heretofore constructed, the" control devices for varying thefeed or cutting it out alto- 4s1,705, and in Great'Britain March 7,1929,

OFFICE The present invention hasamong its, ob

j'e'cts the improvement of bag sewing machines by the eliminationof the successive starting and stopping of the feeding action, and consequent jerky movement of the work during each cycle of the machine and the substitution therefor of a continuous feed carrying the work smoothly and uniformly through the machine past the sewing devices. A further object-of the invention is to provide controlling devices especially adapted to control the rate of such continuous feedof the work, and having capacity for instantaneous reduction of the feed to a point where no feeding of the work takes place though the machine continues to operate, in order to provide for the stitching operations in rounding the corner of a bag. Another object of the invention is to provide controlling devices for these purposes just stated which, are at all times easily within the reach of the operator from whatever position hemay be compelled to assume before the machine in manipulating the work, and which can be operated by either hand of "the operator as may be convenient at any given moment.

For the attainment ,of the above objects,

the several features of the present invention consist in the devices, combinations, and arrangements of parts hereinafter described and claimed, certain of which, while partlcu- .larly applicable to machines for sewing bags,

suitcases and like articles, are also capable ofuse in other types of sewing machines.

The several features of the present invention and the results attainedthereby will be apparent to those skilled in the art fromthe following description taken in connection withthe accompanying drawings in which Figure 1 is .a front elevation of a portionof a typical bag sewing machine, showing the improved work feeding and feed-controlling devices of the invention; Figure 2 is aside elevation of, a portion of the same; Figure 3 is a s1deelevat1on slmllar'to Figure 2, show ing also the horn or presser which engages the interior of the bag, and the means of mounting and actuatmg the same; Figure 4 is an end view of a'portion of the mechanism devices are in the novel machine given lateral movement to feed or assist in effecting the continuous feed of the work.

, In the machine illustrated, the work supporting table 2; is adjustably fixed on a hori zontal slide 4 mounted in a guideway 6'on the machine head so that it may be moved to and'fro across the machine. This work supporting table is constructed and mounted as illustrated and described in the patents above referred to, and comprises work supporting surfaces inclined with relation to each other and arranged to engage two outersurfaces of a rectangular bag adjacent acorner of the bag, and support said surfacesat an inclination to and intersecting the path of the needle. The slide 4 has affixed to its right-hand end a bracket 8 which has attached to it, on a horizontal pivot 10 extending rearwardly of the machine, the left-hand end of a substantially horizontal link 12, the right-hand-end of which is pivotally connected to the righthand end of a second link 14 by a horizontal pivot 16 extending rearwardly of the ma; chine. The left-hand end of thejsecond link 14 is connected by a horizontal pivot 18 extending rearwardly of the machine to one arm 20 of a U-shaped feed controlling lever 22 pivoted on the machine frame at 24, 24. The right-hand end of the first link 12 which i at its left-hand end is connected to the work support "slide 4 has pro ecting upwardly.

from it a lug or short arm 26 to which is pivotally connected by a horizontal pivot 28 extending rearwardly of the machine the lower end of a substantially vertical link 30. The upper end of the latter linkBG is piv otally connected by a horizontal pivot 32 extending rearwar-dlyof the machine to an arm 34 of the bell-crank lever rotatably mounted on a horizontal rearwardly extend.

ing rock-shaft 36 mounted in the machine head and passlng'below the cam-shaft of the machine. a The other arm 38 of the bell-crank lever extends upwardly in front of a cam 40 on the cam shaft and carries at its upper end a ca'mroll which enters a cam groove (not shown) in the cam 40. When, by manual and the amount of such movement depends on how far the pivot v18 connecting the sec- 0nd link 14 and the arm 20 of the feed controlling lever 22Lis moved out of axialalignment with the'pivot 10, as a result of manual adjustment ofthe feed controlling lever 22 angularly about its pivot 24. In other words, the further the axis of the pivot 18 is swung away from the axis of the pivot 10, the greater the horizontal component of movement of the pivot 16 when oscillation of the bell crank lifts and lowers it through the medium of link 30. Itis this horizontal component of movement of the pivot 16 which is trans mitted through the link 12 and the bracket 8 I to move the feed slide 4 and with-it the work support 2.

From the above it will belunderstood that the feed controlling lever 22 may be so positioned that the work support slide 4receives a work feeding movement, which may be varied in length, as desired, or receives no operations of the machine.

The needle 42 and its guide 44 and the thread lifter lever46 are caused to travel with thework support in its work feeding fee-dine movement at. all during the cycle of movements. The thread lifter lever 46 is-pivotally mounted on the machine frame and its connection to its cam lever, which consistsof v a block on the hub of the lifter lever and a slot entered thereby in the cam lever as in the machine illustrated and described in the patent to French and Meyer No.473,870,'

dated April 26,1892,allows the thread lifter lever to move on its pivot laterally of the machine. The thread lifter lever 46 is moved laterally by a plate 48 projecting from the slide 4. The needle spindle 50 and the spindle 52 which drives the needle guard 44 are rotatably mounted inthe machine headas in the machine disclosed in the patent to French and Meyer. above referred to and at their left-hand ends (viewing the machinefrom the front) are connected, in order that they may be moved axially, toa vertical plate 54 extending upwardly from aneedle slide 56 which is mounted in a horizontal guideway 58 formed in a bracket SO-fixed to the machine head. 'The needle guard 44 moves laterally. with the' needle, The vertical plate 54 is connectedtothe work. supportby a horizontal.

bolt 62 which passes through aslot 64 in the drive mechanism.

plate, which slot allows ofthe adjustments of the work table, and is threaded into alug 66 on thetable. The'needle 42 is driven to pierce the work in the usual manner by a cam operated lever (not shown) having on it a gear segment which=meshes with the needle segment and the teeth of the two segments are long enough to allow the feed movements of the needle without becoming disengaged. This is also the case with the needle guard The awl 68 is fixed in an awl segment 70 which is carried by an awl-slide 72 mounted in a guideway 74 formed in the side of'the upstanding portion of the worksupport slide 4, and arranged to slide therein laterally across the machine. The awl slide 72 has fixed to it a bracket 76 which has pivotally connected to its right-hand end on a rearwardly extending pivot-'7 8 the lefthand end of a substantially horizontal link 80 the right-hand end of which is pivotally connected by a rearwardly extending pivot 82 to the right-hand end of a second link 84. which extends to the left and at its left-hand end is pivotally connected by a rearwardly extending pivot 86 to the other arm 88 of the feed controlling lever 22 hereinbefore described. The link 80 which is connected to the bracket 7 6 has at its right-hand end a lug 90 to which is pivotally connected at 92 the lower endof a substantially vertical link 94, the upper end of which is pivotally connected at96 to an arm 98 fixed on the forward end of the rock shaft 86 hereinbefore de scribed. Another arm 100, fixed to the rear end of the rock shaft extends upwardly behind the cam 40, hereinbefore described as actuating the work supporting slide, and carl'ies'at its upper end a cam roll which enters the same cam groove as the roll on the arm 38 of the bell crank located in front of the cam, the rolls being 180 degrees apart about the axis of the cam shaft. The pivot 86 connecting the arm 88 of; the feed controlling lever 22 and the link 84 is in axial alignment with'the pivot 18..connecting the other arm 20 of the feed controlling member and the second link 14, so that when the feed controlling member is positioned, as hereinbefore described, to bring into axial alignment the pivot 18 and the pivot 10 as aforesa d, then the pivot 86 connecting the other arm 88 of the feed controlling lever and its link 84 is in axial alignment with the pivot 78 connecting the awl slide bracket 76 and its link 80 and these latter two pivots are also in axial alignment with the pivot-s 18 and 10 so that during operation of the machine no movementof either the work support or the a'wl takes place along the line of feed. lVhen during the operation of the machine the awl is retiring after having pierced the work and the needle is in linewith it and following it connecting the right-hand ends of the two pairs of horizontal links associated respec-- tivelywith the work support and awl' slide are always in axial alignment and such alignment and relative positions; of the needle and awl are not changed by the positi'on of'the creased as the feed controlling lever 22 is adjusted to vary the stitch length. The. latter lever 22 has, an upwardly extending arm 102 to which is pivotally connected one end of a link 104. This link extends to the left and at its other endis pivoted to a horizontal bar 106 extending across the Imachi'ne and slidably mounted in bearings'in the machine head. The bar has fixed to it at its opposite ends two handles by means of either of which it may be moved lengthwise, and the length of the bar is such that the handles are in position on the machine so that the operator, in his normal working position, can readilyreach one handle with his right or the other with his left hand, whichever may be free for that purpose. The bar has formed in it at v each end a numberof holes 108 in selected ones of which pins one of which is shown at 110 in Fig. 1 may be placed, and these pins are adapted to engage the bearings for the bar and thereby help in positioning the feed controlling member 22in one or other of its selected extreme positions. 3 f e a The machine is provided with a clutch and brake mechanism which latter when the clutch treadle is released stops the machine always at substantially the same point in its cycle and the times in degrees of rotation of the cam shaft of the machine at which the awl, on the one hand, and the work table and needle, on the other hand, operate are to be considered, in the following description of the timing of these parts, as being taken from this stoppingposition.

When the machine stops the needle has moved part way forward towards the Work. It commences to pierce the work at105 (see A Figure 6) and reaches its fully forward position at 1459. Itdwells for 20, commences to move back atl65, leavesithe work at about 180, and reaches its fully back position at 225, where it dwells until it begins to move forward at 330. 7

, When the machine stops, the table and needle are near the end of theirmovement in thefeed direction and when the machine is started they continue their movement in this dlrection and begin to move back along the l-attermovement. ends "at 95 and they immediately begin to moveinthe direction of feed and continue to move in this direction to 360.

6-5 through the work, the two pivots 16 and 82 When themachine stops, the awl is down line of feed at-45 (see'B Figure 6 This out of thework. ;When' the machine is started it "immediately begins to mo-ve'up towards the work andbegins to pierce thework at 25(see' C Figure 6). It finishes its upward movement through the .work at 50 and dwells until 90. It then commences to move down and leaves the work at 110 reaching its lowest position at 155. It dwells in its lowest positionfor 35 and commences to move towards the'work at 190 and stops somewhat below the work at 220, where it remains until 360". At the stopping position, the awlis partway along its movement in thedire'ctionoffeed (see D Figure 6). It finishes its movement in this direction at 225 and immediately begins to move back reaching the end of its backward movement at 2759. Itthen immediately begins to move forward inthe direction of feed. 7

During an operation of the machine in sewingaseam, the work is fed continuously first by the table, then by the awl, then by the needle and table, and then, after the needle has left the work and before the awl has once more entered it, by the table. During the movement of the table and needle in feeding the Work, the awl is back fed,'and while the awl is in the work and feeding the work, the table and needle are back fed; To assist the operator in holding the work in the machine, the illustrated machine is provided with a horn presser to engage the interior ofthe work, said-horn presser being constructed, arranged and operated as illustrated and described in Patent No. 1,695,? 18 hereinbefore referredto. This horn is indicated at 112 and isprovided at its work engaging tip with a rotatable tablet or roll 11A. The horn is secured to a block at the lower end of a vertical spindle 116 mounted in a bearing block 118 which block is provided with a substantially horizontal projecting stud 120 journalled in a frame 122 which, in turn, is mounted upon a horizontal shaft 124 on the main frame of the machine. The shafts 120 and 124 are arranged at right angles to each other and permit a swinging movement of the horn in the'direction of feed and also a swinging movement towards and from the work I as fully described in Patent No. 1,695,718.. Tomove the work engaging end of the horn towards and from the work, an arm on theframe' 122is connected through a rod 126 to a cam'actuated lever 128, also as in the patent above referred to. The mechanism for moving the horn towards and from the workis timed so that the horn is raised from the work while the awl is in and feeding the worln'at which time, as has been stated, the table is being back fed. During the feeding of the work by the table, the horn may swing about the axis of theshaft 120 as a pivot, or

the roll 114: 'atthe end of the horn may rotate as the work moves under it.; o r u a a The times in the cycle of'the machine (in relation to the advance and retraction of the needle) atwhich the other parts such as the take-up, thread lifter and shuttle operate are the same as in machines of this type as usually heretofore constructed; H

The nature and scope of theinvention having been indicated and an embodiment of :the several features of the invention having been specifically. described, what is claimed is V 1. A machine for sewing suitcases, bags and the like having, in combinatiOmstit-chforming devices including a needle and an awl, a work support having work supporting surfaces, inclined'with relation to each other and arranged to engage and support two outer surfaces of the work adjacent a corner at an inclination to," and intersecting, the needle path, a horn presser to engage; the

inside of the work, and means for relatively moving the needle, awl, work-support, and presser to lmpart a continuous feeding movement to the work.

2. A machine for sewing suitcases, bags and the like having, in, combination, stitchforming devices including a needle andan awl, a work support having work supporting surfaces, inclined with relation'to each other and arranged to engage and support two outer surfaces of the work adjacent a corner at an inclination to, and intersecting, theneedle path, a horn presser to engage the inside of the work, a plurality of mechanisms for relatively moving the needle, awl, workfsupport and presser to impart a continuous feeding movement to the work, and a common means for adjusting said mechanisms to cause no feeding movement to be imparted'to the work. j

3. A sewing machine having,in combina tion, a needle, an awl, a work support, a

presser, mechanism for relatively actuating said parts'to feed the work, and means for adjusting said mechanism located in position to beactuated by the operator with either hand While holding work in the machine.

A. A sewing machinehaving, in combination, a needle, an awl, a work support, a presser, mechanism for relatively actuating.

said parts to feed the'worln andmeans adtively actuating said parts to impart a icontinuous feedin movement to thework each holding work V I mechanism comprising a plurality of pivotally connected links, a feed adjustingframe'to which a linkof each 'gmechanism is pivoted,

and a longitudinally "movable frame adjusting rod connected to said frame and'extend ing horizontally across the machine on each side of the sewing point in position to be actuated by the operator with either hand while holding work in the machine.

6. A sewing machine having, in combination, a feed slide, a work support and a 'needle mounted on the slide, an awl, an awl carrying slide, a presser arranged to press the work against the work support mounted independently of said slides, and means for reciprocating the slides and actuating the needle and awl to impart a continuous feeding movement to the work.

7. A sewing machine having,'in combination, a feed slide, a work support and a needle mounted on the slide, an awl, an awl carrying slide mountedin the feed slide, a presser mounted independently of said slides andmeans for reciprocating the slides and actuating the needle and awl to impart a continuous feeding movement to the work.

8. A lock stitch sewing machine having, in combination, stitch-formingdevices including a curved hook needle, an awl, a work support, a presser, means for relatively actuating said parts to impart a continuous feeding movement to the work, and a thread lifter mounted to move with the needle in the line of feed.

9. A sewing machine having, in combination, a feed slide, a work support and a needle mounted on the slide, an awl, an awl carrying slide, a presser arranged to press the work against the work support, and means for reciprocating the slides and actuating the needle and awl to impart a'continuous feeding movement to the work.

10. A sewing machine having, in combination, a work support, a. needle, an awl, a presser, means for actuating said parts to impart a continuous feeding movement to the work timed to move the work support in the direction of feed with the needle while the needle is in the work, to back-feed the work support and needle while the awl is in "the work, to back-feed the awl while the awl and needle are out of the work, and to raise the presser from the work during the back-feed of the work support.

11. A machine for sewing suitcases, bags and the like having, in combination, stitchforming devices including a needle and an awl, a work support having work supporting surfaces, inclined with relation to each other and arranged to engage and support two outer surfaces of the work adjacent a corner at an inclination to, and intersecting, the needle path, a horn presser to engage the inside of the Work, and means for relatively moving the needle, awl, work-support and presser to impart a continuous feeding movement to the work timed to move the work support back and forth in the line of feed and to raise the presser foot from the work during the back feed of the work support.

outer surfaces of the work adjacent a corner at an inclination to, and intersecting, the

needle path, a horn presser to engage the inside of the work, and means for relatively actuating said parts to impart a continuous feeding movement to the work first by the work support, then by the awl, and then by the work support and needle simultaneously. In testimony whereof I have signed my name to this specification.

GEORGE HAZELTON.

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