US1770992A - Welt-sewing machine - Google Patents

Description

WELT SEWING MACHINE Filed June 28, 1927 4 Sheets-Sheet l Fig John Roger @Vn/ev Bmw, www @GMW/r A Ays,

July 22, 1930- Y .1. R. OLIVER 1,770,992

WELT SEWING MACHINE Filed June 28, 1927 4 sheets-sneer 2 Fig@ 'John RogerOlver by @Owl/, KMUM 8L @wf-hbz" Ays.

July 22, 1930. J R, OLIVER 1,770,992

WELT SEWING MACHINE Filed June 28, 1927 FigL 4 Sheets-Sheet ."5

log /08 lnvenor.

4John RogerOlver by R050, www 9 @Ww/l Ays.

July 22, 1930. J, R 0| |VER 1,770,992

WELT SEWING MACHINE Filed June 28, 1927 4 Sheets-Sheet 4 Fig@ lnven'or.

John Roger @Hvar by /Rvgwkvmw L MWI L ATTyS.

Cil

Patented July 22, 19320 n UNITED'STATES] .PATENT OFFICE .ionivnoenn omvnncr' MEDFIELD, MAssAOnUsE-TTS, Assinvon To nance SHOE MA- entrainer COMPANY, or BOSTON, MAssnonUsnTTs, n CORPORATION OF ,MAINE WELT-SEWING MACHINE Application filed June 2,8,

This intention relates to` welt sewing ma.- chines, and more especially7 to sewing machines known Y as `,v-elt-and-turn machines. An exampleef such machine isthe' Reece welter in which the shoe insole is stitched to the lip of the upper and to the we-lt strip, exemplified by Patents 1,288,366 ofDecembr 17, 1918 and 1,361,952 of December 14, 1920. An appropriate stopping and starting mechanism for such machines is shown in my Pat-l ent 1,532,634 of April 7, 1925. My prior application Serial No. 21,544 filed April 8,1925 discloses improved mechanism for the feeding, guiding andapplying of the welt strip, certain` features of which are employed with the present invention. I have heretofore devised certain mechanisms for severing theV welt strip after the stitching of a seam and the stoppage ofthe Vmachine and have applied for patents thereonr applications Serial Nos.` G ,014 filed October 26, 1925v and 68,191 filed November 10,1925. These prior patents and applicationsmay be referred to forvarious details not herein fully shown-or described.

The novel features of the present invention however are applicable to other makesV and types of welt sewing machines useful in stitching welts or strips to various materials..

The general object ofthe present invention is to afford a simple, convenient and effective mechanism for the handling` of the welt in such sewing machines. A particular Vobject is to improve the mode of trimming offor'sevcring the welt strip after the termination of a seam, this being done, under the principles of prior application 68,191, in a manner to leave a oro"ectin`f length of welt forthecom- Y .l C D i mencement v,of a new seam. The severing device is preferably lcontrolled by a` lever thrownr manually or by a blow from the shoe orworlr at the-will ofthe workman, afterthe machine hasbeen stopped, andv one feature of the ypresent 'invention is the provision -of a safety deviceipreventing the premature actuationofthe severing mechanism; Another 1 feature of the present invent-ion is the einployment of a weltlholdingfmeans or pawl,

normally inoperative, but brought into oper ation at a proper'time to hold'the severed welt end inits. advanced position and prevent e@ 1927. Serial No. 202,()39f4 cidental movement thereof. @ther and further vadvantageous features Of the present'in! the novel welt handling mechanism, and the novel vfeatures of combination, arrangement,

operation, structure and detail herein illustrated or described. j

In the accompanying drawings Fig. 1 is a right elevation of a suilicient part of a welt sewing'machine to illustrate the principles ofthe present invention, thisview corresponding generally with Fig. 1 of said ap'- plication 68,191.

Fig. 2 is a left elevation corresponding generall'y with Fig. 2 of said application 68,191.

Fig. 3 ,is a right elevation of r1L-detached Y part, namely the welt severing blade and its carrying segment. l Fig. 4 is a plan view of certain parts of the mechanism looking downward'inthe slanting direction indicated by the arrow 4 in 2, other parts of the. mechanism being omitted for clearness of illustration.

Fig/5 isa fore and aft section view taken on the line 5-5 of Fig. 4, looking from the left.

`. `Fig. 6 is a front viewl of certain parts of the mechanism yshown in Figs. 1-5,`looki'ng rearwardly in the slanting direction indicated bythe arrow 6 in Fig. 2. n

Fig. 7 is a front elevation of certain parts.. Fig. 8 is aleft elevation of certain details. Fig. .9 isa plan view taken partly in section on the linei 9 9 of Fig.. 8` v t Referring indetail tothe drawings the inverted shoe, which is not shown, will be A,understoodA as being held in place to the front ofv and below'the welt guide, and with Vthehwelt strip'Y W, theshoe upper, and the sole lip advancing leftward inthe path of the Vcurved barbed needle 'C'which may be slidable in the usual oscillating guide c. The welt strip, before meeting. the shoe, is guided by the welt guid along a path indicated at w,

The drawings show an upright fore-andaft frame wall 11 which may be the left hand frame wall of the machine, and spaced to the right of this is seen another frame Wall or fixed bracket 12. The main or operating shaft 13 may have its bearings in the frame walls, and this shaft may be a crank shaft which operates the needle, looper and other stitching instruments by means of lm lts, levers. etc., on the principles of said prior patents. 'llieseparts are not herein shown. Part of the mechanism hereof is mounted at the left or outer side of the frame wall 11, while various other parts are mounted at the inner or right side of the wall, or between the two frame walls. For the purpose of mounting` certain parts the left frame wall is shown as having formed or attached to its inner or right side a fixed irregular bracket or casting' 1T having;` various extensions as in dicatcd by the reference numb r 17 applied thereto. The needle C may oscillate about an axle 18 in the usual manner.` yThe work may be held against the welt guide and the usual type of work rest. and maybe advanced between stitches by the usual feed mechanism. while the welt lV is laid against the shoe yand. stitched in place as more fully eX- plained in the prior patents and applications. rEhe parts thus far described may be substantially preexisting parts of the welt stitching` machine, although modified to accommodate the present invention.

The present invention operates on the following plan basically similar to said application 68,191. A welt severing` blade is arranged to be thrown quickly forward and retracted when the we tis to be out, this blade operating` with a shearing` action. in conjunction with a part or member through which the welt advances. rllhese parts are manipulated so as to sever the welt, not adjacent to the stitching point. or the plane of the need le, but at a point substantially advanced therebeyond, or well to the left of the stitching point. so that when severed there will remain a projectingr welt. for example 1H in length. `facilitating the startingjof the sewing of the welt to the next piece of work or shoe. Tie particular construction shown is one in which the sever ig knife as it swings forward ly toward the welt i at the sa me time shifted toward the left7 thus receiving' a diagonal motion and bringing' it to the desired advanced severing position. In conhecticI with this action the welt guiding; member. which may be a part of the welt lcuide, or any part .looping or surrounding the welt, will preferably be moved leftward along the direction offeed, thus giving support to the welt during the severing action and cooperating with the blade to shear the strip. In other words the blade and the loop member Ymove leftward in unison. while the blade moves relatively forward tocut the welt. The operator may therefore, after the completion of a seam and the stoppage of the machine, pull the shoe and welt bodily leftward to the extent of two or three inches if that amount of loose welt is desired to be left at the end of the seam and then bring about the sei ering action, for example at one inch to the left of the sewing plane, thus leaving the desired free welt end on the completed work', and as well a projecting free end in the machine 'for starting the next shoe. lf the severing devices should be put into action without manually pullingthe shoe and welt to the left, the loop member, surrounding the welt, will bear forwardly and compel the shoe and Welt to advance sulliciently to insure that the severing will be at an unattached part of the welt and that the blade will not injure the work already completed.

The welt guide 2O is a member swingable forward toward the work and rearward from the work and with a recess or surface along which the welt is guided to the work. The guide is an irregularly shaped casting supported on a pair of swinging` arms 22 which turn on an axle 23 extending between a portion of vthe casting 17 and the wall 12.

As in application 68,191 the welt passes throughr the main welt guide and thence through a separate guiding part or loop 2d located directly to the left of the welt guide and capable of leftward shifting movement at the time of lcring, as already explained. rl`he shiftablo guide part or loop member is herein shown as having a rigid extension piece 25 spaced to the left and forming a recess in which the cutter can move. lThis may have :i slotted adjustment, so that a curved extension 25n may be adjusted as a trib in the welt passage 26 in the loop member 24; for welts of Adiiferent width.

The shiftable welt loop member 24 i1. shown mounted at the lower end of a supportingr shank 27 having a circular head 28 by which' it is swingingly mounted in a member to be later described. This permits the separate guide section 24 to partake of the swingingT movements of the main guide 2O during the stitching operations, the shifting guide section normally lying against the main guide. and being held in alineinent thereto at all limes, for example by a longitudinal alining; pin 29 forming a rightward extension of the shifting guide section and passing through an aperture in the main guide, and projecting,T beyond the latter at the right. where it is notched as seen in Figs. 1 and 7 for Acertain purposes.

rlhe severing knife 30 consists of a flat blade movable in the groove between the shifting guide part 2-1 and its spaced extension The knife is sh'ownseparately in 3 and is attached to a curved shank 31 carrying a toothed 'rack 32 engaged by a lll() lill) pinion 33 which is elongated topermit fright The curved shank 31 of the cutter and the :similar-shank 27 of the guide section 24 are accommodated in the arc shaped recess of a guide' member or block 35 which not only guides thetwo shanksand keeps `them iin proper registered position, but is employed give the bodily leftward and` return shitting movements oi thecutter and the guide i, loop section 24. The shift-ingguide 35'is mounted on or-ormed with a guiding bar '36 extendingto the right, anda similar bar 37 extending to the left andpassing throughthe frame wall 11, these two bars being guided respec'ively in a portion of the casting` 17 and in the frame wall. Thelett and right movements of the guide block and connected parts .may be veffected through the carrying bar 37; For this purpose the bar is shown provided with lateral pins l38 engaging in the lower slotted end of a lever 39 at the outer or le'lt side et the wall l1, this lever-being fulcruined atan upper point 40 and'being swung right and left by a link .41 extending from an upwardly and downwardly slidingrbar to"be further described. When the bar Ll5 Vdescends and rises this vrill throw the guide block 35 to the left for Vthe cutting movement and yreturn to the right or normal position. y

The connections for operating thecutter blade may now be described. The pinion 33 which' operates the curved rack 32V of the cuttershank is mounted Von a shaft 42 which `eitends leftward through the iframe wall ll and at its exterior end'carries a pinion L13 ments.

ing a lower hnk plvoted to the extension i8 and an upper link 51 centrally pivoted to the lowerlink by;` aV pin 52, the upper link n vhaving an upper pin 53 engaging in a slot 5,4;

*having a notch V55 at its lower end inwh-ich the pin rests during the vrearward or operative movement of the toggle." A spring 56 normallypholds the toggles in their lowered position shown, with the pin 53 engaging the notch 55.. The toggle is shown operated "byV a rod 58 extending forwardly from the-pin Y 52, andV this rod having'a rear head V59 by` Vloose play in the recess 77 Vof a sleevem'em'- which the parts canbereset: i The rod carries a flange 60 in front oft-he toggles to confine the operating spring,and it also has a tapered front end 61 with a latch receiving notch 62 'to the rear y01"' the'taper. lf he preferred oper.- ation of the cutter 1blade is by the stored tension of aspring G3 which is shown surrounding theV rod53 and pressing rearwardly on the 'flange 60 andthe toggles. Thefront end of the rod maybe guided by alixed bearing 65 'which may be supplemented by a sleeve 66 asin application 68,191. The operation 'oft thespring, when released, is to throw the toggles from the normalV position shown in F ig. 24 through their straightened position and beyond tora rearward position, `thus throwing the bar 45 downwardly and upvwardly. The `subsequent resetting may be effected after the restarting of t-he machine,

lnamely by'an oscillating lever 67 actuated by a. link 68 from themain shaft 13 as in application 68,191, the resetting Vlever .forcing the toggle rodv i'orwardly to normal pontion where it becomes latchedii Normally, and during stitching operations, the toggle mechanism is lat-ched in its for-V ward vposition as shown, .namely by alatch or finger 70 engaging in the notch 62 near the forward end of the rod 58. The latch is in the form of a swinging finger mounted on a fore-and-aft shank7l located somewhat to the lett of the toggle rod. When the latch is thrown 'down' this releases the rod and brings about the lel'twardand rightward shifting `movementsfof the guide blockI 35' carrying the guide loop 24 and the 'knife 30, aswell as the cutting and return movements of the knife itself. The mounting of the latch may beas follows Its shank-or carrying shaft V71 is'shown rotating in a front fixed bearing 72 and a rear'bearing 73, see Figs. 2,4 and 5. To the-rear' of the bearing 72 the shank 71 has al collar 7 t clamped upon it, anda spring 75 which surrounds the bearing andthe Vcollar is so lconnected to them asftolrotate the" shank and Vlift the latch into latehing posi-V tion. Also,'it` is under compression'and holds lar'74 is formed with atooth 7 6 enoa'dinnf with b D D ber 78 in which the shank V71 turns, *within bearingv 73.y The sleeve 78 has a spoke-like 'extension -79.constituting an inclined lever extending to the lett and downwardly ina convenient. position v to be contacted or knocked up by the work', or without-letting go of the work, and lifted so as to throw down the latch and bring aboutthe Vsevering fopen-.1 ation., A spring'SO is shown connected to the bearing73 and the sleeve 7S' and tending to-throwjdownwardly the severing control lever 79.` The sleeve 78 is formedfintoilaV rearwardly. extending shank "81` which' has clamped toit a collar 82 `trom which e2;- tends 'an' upstanding linger 83 taking part in the partsin proper endwise relation. The colthe welt pawl applying action to be described. The play between the lever 79 and the latch, namely in the looseness between tooth 76 and notch 77, permits enough slack so that the welt holding pawl will not be affected or moved when the latch snaps back into place.

The welt guide 20 is continuously pressed forward toward the work, partly through resilient connections as illustrated in application 21,544, but is herein locked forward at certain parts of each stitch cycle by a wedging means. The rod 84 on F ig. 1 is representative of the connections pressing forwardly on the welt guide, and corresponds with the rod 78 in said application, being pivotally connected to a rear extension ofthe welt guide. Extending downwardly and forwardly from the same pivot is shown a locking finger 85 normally engaging in the notch of the alining pin 29 already referred to, as indicated in Figs. 1 and 7. The tail 85"1 of the finger 85 stands above the foot of a lixed stop bracket 86, the arrangement being such that when the shoe is in the machine, and the welt guide thereby held in its rearward position as shown, the lock finger 85 engages and locks the alining pin 29, whereas, after the stitching, and the removal of the work, if the guide is allowed to swing clear forward the tail 85 will strike the stop 86 and cause relative swinging of the lock iinger 85 and the release of the alining rod. This arrangement prevents premature operation of the severing mechanism for the reason that the alining pin 29 is a part of the shifting guide loop member 24, which latter is thus prevented from being shifted leftward, this in turn holding the entire train of parts of the severing mechanism, even to the extent that the link l1 holds the rack bar l5 against being moved downwardly by the toggle devices. IThe operator therefore is unable to eect the severing operation until after the completion of the stitching and the removal of the work.

In connection with these safety devices there is shown a guard hook 88 pivoted at the lower rear part of the welt guide, this extending rearwardly and being there pivoted toV an inclined slide 87 sliding in the casting 17, with a stop pin 87L arranged to strike the casting and so determine the mest forward position of the welt and guide. T he guard hook 88 is adapted to engageupon a guard 89 having a part projecting upwardly in front of the hook. These cooperating parts normally prevent the full forward movement of the welt` guide in a positive manner. The guard 89 is mounted on a shank 90 fulcrumed at 91in the block 17 and it carries an operating pin 92 mounted on an extension and engaged by the slotted end of a lever arm 93 fulcrumed at 94 to the frame wall and having a rearward extension 95 normally pulled down by a sp ing 90 which thereby holds the guard in its open ative position. After the completion of a seam, and the letting up of the pedal to stop the machine, these parts may be shifted to release the welt guide. rIfhus a sliding pin 97 is shown which may be arranged to rise upon the stoppage of the machine, for example by di rect connection with the pedal, and being so located as to throw upwardly the lever arm 95 and thereby pull down the guard 89, releasing the welt guide to swing full forward, this in turn eecting the throw of the lock 1in ger 85 and the release of the severing mechanism as already described.

An advantageous feature of operation of these described. parts is that the welt guide must necessarily move completely forwardly, with a snapping action, when released by the guard, before the actual severing operation takes place. lt will be understood that the needle ei'cillatcs forwardly and rear 'ardly in the recess or groove in the shiftable welt guide loop 2s, 25, and that this loop member is in alinement with the main welt guide, but artakes of a sharp leftward movement at the imc of severing. lilith the welt guide and the loop member in retracted position the lei't ward movement will be likely to strike the point of the retracted needle and break it. 'Ehe necessary quick forward shift of the welt guiding parts however before the severing movements insures these parts clearing the needle.

'rre hereof consists of a welt 'ustrated as a pawl 100 -1 night into action upon the o2-event reverse movement after severe parts which have moved leftward se einig move immediately back to their n)rmal position and the welt back instead of lef` 1g the extending welt crd as desired. lVith this invention connections are arranged whereby the initiation of the sev"-ring action causes the pawl 100 to be pres-:sed upon the welt strip and thus hold it advanced. There are herein shown connections for this pui which are accommodated without ceniiiet in this very congested machine. rlhe welt} vl 100 is shown mounted movably on the w g1 20 in a position to overlie the welt strip passing therethrough, an at its upper sido the pawl is formed with a constant lug 101. For depressing tl` lug to apply the pawl to the welt, as be.. seen in Fig. 6, there is shown lever arm 102 mounted on a hub 103 loose on the axle 23. The depresser arm 102 is thrown downwardly by turning the hub by means of an upwardly extending arm 104 which is thrown rearwardly for the purpose. i lever arm 105 arranged to press rearwardly by Contact against the arm 10a, the arm 105 is mounted on a hub which also carries an arm 10E" ding upwardly and to the rear where his tends to push CTI it is formed with a head S accommodated in a recess in the frame plate or bracket 12.` A push bar or link 109 is shown mounted'loosely in the two frame walls and contacting at its right and left ends resp otively, the head 108 and the upstanding linger S8 rigidly connected with the severingV control lever 79 as already described. By this arrangement when the control lever 79 is knocked upwardly to cause the severing action the linger 83 is thrown to the right and thus operates the rod 109 and the connected train of mechanism to press the pawl 100 down upon the welt fw and prevent its accidental retraction.

lt may be advisab e to adjust the'extreme richt movement or return position of the welt guide loop member 2a, the cutter Vblade 30 and the guide block carrying them, following each cutting operation, so as totrue them up in relation to the parts which do not reciprocate with them. Such adjustment may be effected as follow-s. At the left side of the frame plate 1l is shown a block 111 adjustable In place of the pawl and ratchet shown in application 21,544 for locking forward at one point in each stitch lcycle the welt guide there may beV used herein a wedge member serving a similar purpose but giving a finer adjustment.

There has thus been described a welt sewing machine embodying the principles and attaining the advantages of the present invention. Since many matters of combination,

may be variously modified without departing from the principles it is not intended to limit the invention to such matters except so far as set forth in the appended claims.

1llfhat is claimed is:

1. In a welt sewing machine welt guide means and welt severing means comprising a welt loop member shiftable forwardly in the direction of feed during severing, a welt cutting blade movable toward the welt and shiftable forwardly with said loop member, the loop member having a slot and the'cutting blade being `fitted to move in such slot in the loop member and to givev a shearing action on the welt, operating mechanism for shifting forwardlyV said loop member and blade while operating the latter, whereby the welt'will be severed substantially beyond the stitching` point, and means operable 'after stitching to put the operating mechanism into action.

2. In a welt sewing machine welt guide means and welt everingmeans comprising a ywelt loop member shiftable forwardly in theV direction of feed during severing,a weltl cutter movable toward the welt` and shiftable forwardly with said loop member, operating mechanism for shifting forwardly said loop member and cutter while operating the latter, whereby the` welt will beY severed substantially beyond the stitching point, vand means operable after stitching to -put the operating mechanism into action, the operating mechanism Vcomprising a sliding bar (45), resilient means moving the cutter and sliding the bar, a swinging lever for shifting the loop member and cutter, and alink (41) between the bar and lever.

3. In a welt-sewing machine welt guide' means and welt severing means comprising awelt loop member shift-able forwardly in the direction of feed whenrsevering, a welt cutter movable toward the welt and shiftable S54 forwardly with .said loop member,'operating mechanismforV shifting forwardly said loop member and cutter and actuating thelatter to sever tie welt substantially beyond the" stitching point, means preventing the operation of the operating mechanism during stitching but allowing operationafter the cessation of stitching, andmanual means operable at will after stitching to put the oper ating mechanism into action. ll. In a welt sewing machinewelt guide meansand welt severing means comprising a welt loop member shiftable forwardly in the direction offeed during severing, a welt cutter movable toward thelwelt and shiftable forwardly vwith said loopV member,- operating mechanism `for shifting forwardly said loop member and cutter while operating the latter, whereby the welt will be severed substantially beyond the stitching point, in-` cludingspring means for operatingthe cut- Nif.

ter, a latch*(70)*restraining the spring, a arrangement, operation, structure and detailv springfpressing the latch, a knock lever having a. loose connection with the latch for throwing it, and a spring pressing the lever.-

.5. Y In a 'welt sewing machine welt severing means comprising a welt loop member shiftl able forwardly during severing, a welt cutter movable toward the' welt and shiftable forwardly with said loop member, operating l -7 mechanism .for shiftii'ig forwardly said loop memberiand cutter while operatingl the latter, whereby the welt will be severed sub-` stantially beyond thestitching point, a control lever operable to put the operating mechanism intoaction, and means preventing the operation of said lever during stitching.

6. A welt sewing machine as in claim 5 and wherein the preventing means operates by locking the loop member against forward shifting.

7. ln, a welt sewing machine a main welt guide, welt severing means c mprising a welt loop member adjacent to said guide but shiftA able forwardly during severing, a pin alining [fili said guide and loop member, a welt cutter movable toward the welt and shiftable forwardly with said loop member, operating mechanism for shifting forwardly said loop member and cutter while operating the latter, whereby the welt will be severed substantially beyond the stitching point, and means for locking said pin to prevent operation during stitching.

8. ln a. welt sewing machine welt severing means comprising a welt guide member pressing transversely to the direction of feed during stitching and shiftable forwardly during severing, a welt cutter movable toward the welt and shiftable forwardly with said guide member, operating mechanism for shifting forwardly said guide member and cutter while operating the latter, whereby the welt will be severed substantially beyond 20 the stitching point, a guard for said guide member preventing complete transverse movement during stitching, means releasing the same after the stitching, and means pre- `venting the operation of the severing mecha- 25 nism until after the guard releases the guide member.

9. In a welt sewing machine welt severing means comprising a welt loop member shiftable forwardly during severing, a welt cutter 30 movable toward the welt and shiftable forwardly with said loop member, operating mechanism for shifting forwardly said loop member and cutter while operating the latter whereby the welt will be severed substan- 5 tially beyond the stitching point, and for returning the same, and means preventing reverse movement of the welt after the severing action.

l0. A welt sewing machine as in claim 9 4.) and wherein the preventing means comprises a welt holder and means putting it into action at the time of severing the welt.

ll. A welt sewing machine as in claim 9 and wherein the preventing means comprises a welt holder and means putting it into action at the time of severing the welt consisting in a lever system for putting pressure on the welt holder and a control lever or handle for operating the same, and means 'im controlled by the same lever for causing the l operation of the operating mechanism.

In testimony whereof, I have affixed my signature hereto.

JOHN ROGER OLI-VER`

Images