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Dec.‘ 17, 1946. J. DASHEW ‘ 2,412,768 THREAD MARKING MACHINE Fi'led May 22, 1945 2 Sheets-Sheet 1 ~* JACOB DFXSHEZW‘ Dec. 17, 1946. ' J, DASHEW 2,412,768 THREAD MARKING MACHINE Filed May 22, 1945 2 Sheets-Sheet 2 JACOB DAsHEW' Patented Dec. 17, 1946 2,412,768 UNITED STATES PATENT OFFICE 2,412,768 THREAD MARKING MACHINE Jacob Dashew, Baltimore, Md. Application May 22, 1945, Serial No. 595,104 6 Claims. (01. 112-2) 2 This invention relates to improvements in thread marking machines. In the production of clothing, particularly men’s and ladies’ suits, by the larger tailoring provide a knotter actuating mechanism which will insure the formation of a comparatively large loop in the thread after it has penetrated the stacked plies of fabric so that it is unnecessary to reduce the cross-section of the needle to any establishments a plurality of plies of fabric are cut or fashioned in one operation and it is the usual practice to mark these several plies while material extent such as would weaken the needle and render it more liable to fracture during the operation of the machine. A still further object of the present invention still stacked one upon another with a thread eX~ tending through them, say at each point where a button is to be attached or at the corners of 10 is to simplify the operating connections for the pockets, and other points at which work is to be performed on each ply after it has been sepa rated from the others in the stack. In sepa rating the several plies of a marked stack the thread, which originally extends in a continuous length through the stack, is severed between each two thicknesses of material so that each piece of fabric carries a short length of marking thread at each of the points mentioned. Heretofore this knotter mechanism in that the movements of the rack bar through which the knotter mechanism is operated and of the actuator slide for that rack bar correspond to one another in the sense that movements of the slide bar cause the rack bar to move in corresponding directions as distinguished from that form of operating connections where in movement of the actuator slide in one direction causes the rack bar to move in the opposite direc marking thread has been placed through the 20 tion. As a result of this correspondence in the several thicknesses of fabric by what is herein directions of movement of the rack bar and its termed a thread marking machine and to over actuator slide, the number of gears used in con come the tendency of the thread to pull through necting these parts are reduced to a minimum. the plies of fabric as they are removed from the With these and other objects in View, the in- ' machine or while they are being separated from 25 vention consists in certain details of construction one another for severing the thread between each and combinations and arrangements of parts, all two thicknesses, it has been the practice to tie as will hereinafter be more fully described and a knot in the thread underneath the lowermost the novel features thereof particularly pointed out ply. In some instances the knot has been tied in the appended claims. manually which requires the operator to slip his hand under the stack of fabric and grasp and tie the thread but as this manual tying of the knot is rather tedious and increases the time fac tor involved in the marking operation it has also been proposed to provide a knot tying mecha nism in the base of the marking machine which will be automatically operated to tie the knot iii in In the accompanying drawings Figure 1 is a side elevational view of the pres ent machine with the base shown in cross-section; Fig. 2 is a detail view showing the actuator slide latch in side elevation but with the forward end of said slide broken away for purposes of illustra tion; Fig. 3 is a top plan view of the machine base, the after the thread-carrying needle has pierced the base being broken away to illustrate the knotter several plies and during the return movement of mechanism and the connection between the rack that needle. A thread marking machine having 40 bar which actuates the knotter and the actuator a knotter mechanism in the base thereof oper slide through which motion is transmitted from able by the movement of a depressible operating the operating lever to said rack bar; lever which advances and retracts the thread Fig. 4 is a horizontal sectional view on the line carrying needle through the stack plies of fabric 4—4 of Fig. 1 looking in the direction of the arrows is fully disclosed in the application of Robert L. 45 appearing on that section line; Dashew, Serial No. 530,888 ?led April 13, 1944, to which reference is hereby made for a complete description of the construction and operation of Fig. 5 is a horizontal sectional view on the line 5—5 of Fig. 1 looking upward or in the direction of the arrows appearing in conjunction with that the knot tying mechanism. In the machine section line; and shown in said application, Serial No. 530,888, the 50 Fig. 6 is a detail plan view of what is termed needle is made with a reduced cross-sectional area adjacent its point in order to insure the knotter mechanism properly engaging in the loop of thread carried by the needle and one of the the loop shifter of the knotter mechanism. As the knot tying mechanism, per se, consti~ tutes no part of the present invention it is not disclosed in detail herein but a full. disclosure is principal objects of the present invention is to 55 to be found in application, Serial No. 530,888, ’ 2,412,768 3 above identi?ed. For the purposes of the present 4 tially withdrawn or retracted before actuator slide 15 can be moved by spring 22, this partial case it will su?ice to say that this knot tying retraction of the operating lever l2 and, conse mechanism consists essentially of a thread looper quently, the needle I!) causing a loop to be formed in the form of a hook H, a loop shifter S, and a dual-jawed knotter B which normally occupy 5 in the thread in position to be engaged by the knot tying mechanism elements. In other words, when the positions illustrated in Fig. 3,- and which are the operating lever I2 is depressed the needle “I, adapted to be actuated by a reciprocatory motion with the thread, is pushed through the fabrics of a rack bar R which is provided with tWo rows down into the base of the machine and when the of rack teeth T, T’, for transmitting motion to the before-mentioned knot tying instrumentali 10 operating lever 52 is permitted a slight retractive movement the needle will be withdrawn a short ties. As will be later explained, the needle I!) distance but as the thread itself is frictionally carrying the marking thread M (Fig. 1) is mov held in the fabrics the thread is not Withdrawn able by an operating lever l2 from the position and forms a comparatively large bulge or loop shown in Fig. 1 downwardly through a needle opening‘ it in the base M of the marking ma 15 positioned in the path of the thread-engaging chine, so that the thread ! i can be engaged by the knot tying devices which are actuated by the operating handle or lever 12, the actuating con nections between the handle and the rack bar R of the knot tying mechanism being that por“ tion of the machine in which the present inven tion is embodied. elements of the knotter. ’ To effect this delayed action of the actuator slide it is retained or releasably held in its nor mal position, as shown in Fig. 1, by a latch 21 pivoted at one end on a pivot pin 28 in bracket It with its opposite end positioned in the path of a lateral abutment 29 on the actuator slide, the latch being held in this position by a plate spring. _ Essentially, the actuating connectionsbetween 35 secured on the undersurface of the bracket. rack bar R and the operating lever l2 consist of an actuator slide l5 slidably mounted on the 25 This latch 21 constitutes essentially a stop en gageable with the actuator slide and it is bracket 16 which overhangs the machine base, adapted to be released by va pin 3! carried on the this slide 85 having a depending extension l5a operating lever in a position where, when the whose lower end carries a rack I? which meshes lever is depressed, said pin 3| will engage and with a gear l8 fast on a second gear [9 which engages the teeth 25 of rack bar R. The gears 30 depress the latch, as shown in Fig. 2. In Fig. 2 the lever 12 is shown fully depressed at which l3, l9, are rotatable on a shaft 2! mounted in time the pin 3| is in the path of the abutment the base of the machine and, as will be apparent, movement of slide l5 and its rack bar I’! in one 29 on the actuator slide I5 and, while the abut ment 29 has been permitted a slight movement direction or the other will, through the gears so as to clear the end of the latch 21, neverthe l8, l9, cause the rack bar R to move in corre less the actuator slide is still unable to com- » sponding directions. At this point, it should be pointed out that this provides a comparatively plete its full movement under the influence of the spring 22 by reason of the fact that the pin simple connection between the rack bar I1 and 3! is still interposed in the path of the abutment rack bar R, only the twogears fast with one an other being required by reason of the fact that 40 29. In other words, the actuator slide I5 can not move to shift the knot tying elements from the two rack bars occupy the same relative posi— their normal positions to their thread-engaging _ tions with respect to the gears with which they positions until the operating lever has been re mesh and the further fact that both rack bars tracted a slight distance sufficient to free the ' move simultaneously in the same directions. As stated, the thread‘looper H and the loop ' abutment 29. However, when the operating lever has moved upwardly this slight distance the shifter S are shown in their normal positions in Fig. 3. When so positioned, they are located spring 22 will snap the actuator slide toward the left, as viewed in Fig. 1, it being understood that to one side of the path of the needle whose point with the operating lever substantially fully de is adapted to be received in guide G in the base and to move the parts into thread-engaging posi 50 pressed its arm 25 will be spaced some‘ distance from the stud 26 on the slide and said arm 25 tion rack bar R has to be moved to the left, or will not interfere with this movement of the in the direction of the arrow, as shown in Fig. 3. slide. This movement of said slide will, through To accomplish this the slide 15 is ‘movable to- the its rack bar H, the gears l8, l9, and the rack left, as viewed in Fig. 1, under the influence of a spring 22 attached at one end to a pin 23 on 55 bar R, cause the knot tying instrumentalities to assume their thread-engaging positions. How the slide and at its opposite end to a pin 24 on ever, at this time, the large loop will have been the bracket l6. Reverse movement of the knot formed in the thread by reason of the slight re ting mechanism for the purpose of tying the knot traction of the needle, asv previously described, is accomplished by a reverse movement of the rack bar R which, in turn, is effected by means (50 so that, as the operating lever completes its retractive movement its arm 25 will engage pin of an arm 25 rigid on the operating lever and 25 and force the actuator slide ‘I5 back to its whose lower end is adapted to engage a stud 25 normal position with the result that the rack bar on the actuator slide l5. Normally the actuator slide I5 occupies the'position in which it is shown R will, likewise, be moved in a reverse direction in Fig. 1, so that, when it is free to move under 65 to ‘effect the tying of the knot in the loop of the influence of spring 22, it will move toward thread. These movementsv of the actuator slide and the knot tying devices are all effected the left and thus cause the knotter elements to rather rapidly because the spring 22 snapsthe assume their thread-engaging position but, in order to permit a comparatively large loop to be actuator slide I5 to the left, as viewed in Fig. ‘l, formed in the thread H after the latter has been 70 as soon as the slide ‘abutment 29 is free of the pin 3| 0n the operating lever andthe return pushed through the layers of fabric on the base 54 into positiohto be engaged by the knot tying movement of the slide is also carried out with more or less of a snap action because the retrac mechanism, the movements of the actuator slide are so controlled that the operating lever 12 is ’ 'tive movement of the operating lever 12 is also permitted to be completely depressed and par ‘75 performed with a spring action as described in 6 the‘ previously identi?ed application. The spring base toa point below’the base for engagement for, retracting the operating lever is simply here of the thread by said knotter mechanism ‘and shown at 40 in Fig.4. In other words, the oper ator does little more than depress the operating lever and then releases it. -’ rA'fur-ther-detail, and a further advantage ‘of means operable by said lever for reciprocating said rack bar, said rack bar reciprocating means comprising a reciprocatory actuator slide con nected to said rack bar, a spring for moving said actuator slide in one direction; a- stop normally engaging said slide and releasably holding the the present arrangement‘ for actuating the rack bar- of the knot tying mechanism is the fact that‘the pin 31- is‘ adjustable into and out'of same against movement under the in?uence of the operating lever, but locked in any desired 10 said spring, a stop actuating-member operable position by a lock nut 32. Thus the distance upon advance movement of the needle through the pin projects from the handle can be length the fabrics to disengage said stop and permit enedor shortened to vary the distance the oper a .limited'movement of said slide by said spring, ating lever must be initially retracted to free the said‘ stop actuating member being engageable by abutment 29 of the actuator slide which, in turn, 15 the slide by said limited movement of the lat will permit the size of the loop formed in the ter to ‘prevent further movement thereof while thread to be varied. In other words, but screw the needle is advanced and disengageable from ing the pin 3| into its socket in the lever arm the said slide upon retraction of said needle to per pin may be said to be shortened so that it will mit completion of the movement of the slide clear the actuator. slide abutment 29 after- a under the in?uence of said spring whereby said very slight retractive movement of the operating rack bar will be reciprocated in one direction, lever. Under these circumstances, the needle and means operable by the retraction of said op will be retracted only a short distance and a erating lever and needle for reciprocating said comparatively small loop formed in the thread. actuator slide and rack bar in the opposite di On the other hand, by adjusting the pin out 25 wardly from the handle it may be said to be 2. In a thread marking machine having a base rection. lengthened so as to require a more extended‘re ~ ‘ on which the fabrics to be marked are supported, a knotter mechanism below said base, a thread tractive movement before itclears the actuator slide abutment 29 and,runder these conditions, a comparatively largerloop will be formed in the '> thread for engagementby the knot tying devices. As previously indicated, by forming the bulge or loop in the thread it is unnecessary to make the needle of reduced cross-sectional area and thus Weaken it as is the case where the thread looper'H'has to more or less pick the thread 01f the ‘side of the needle; In this connection it should be added that in'view of vthe fact that the needle is in its‘depressed position at the time the loop shifter S moves from its normal posi 40 tion to. itsoathread-engaging position, this loop shifter is made of two hingedly connected sec tions S’, $2, the section S2 being mounted on the shaft 33 and the two sections being pivotally connected together by a pivot pin 34, as shown > is. C, carrying needle, a depressible operating lever for moving said needle and thread from a point above the base through the fabrics to a posi tion for engagement of the thread by the knotter below ‘the base, and a reciprocatory slide for actuating said knotter mechanism, the‘ combi nation of a spring formoving said slide in one direction, a stop normally engaged by said slide and preventing movement thereof under them ?uence‘ of said spring, a trip carried by said lever for disengaging said stop from said slide and engageable with said slide to prevent movement of‘ the ‘latter under the in?uence of the spring when said lever is fully depressed, said trip be ing disengageable from said slide upon retraction 0f the: operating lever whereby the slide is moved in one direction by said spring and means oper in Fig. 6. Section S’ is provided with an abut able by said lever during the retraction of the ment 35 which is held in engagement with a latter for returning said slide to its normally pin 36 on section S2 by a spring 31, the arrange locked position. i ment being such that when the loop shifter 3. In a thread marking machine having a base moves from its normal position to its thread 50 on which the fabrics to be marked are supported, engaging position the section S’ can turn on its pivot 34 so as to wipe past the needle 3| but a knotter mechanism below said base, a thread carrying needle, a depressible operating lever upon return of the loop shifter in a knot tying for moving said needle and thread from a point operation it constitutes a substantially rigid ele above the base through the fabrics to a posi ment, it being understood that during this por tion of the cycle of operations the needle 3| has tion for engagement of the thread by the knotter been elevated. The actuator slide I5 may be below the base, and a reciprocatory slide for secured on the bracket It in various ways al actuating said knotter mechanism, the combi though in the present instance it is merely nation of a spring for moving said slide in one shown as being provided with slots 38 through 60 direction, a releasable latch normally engaging which studs 39 secured in the bracket 16 extend, said slide and preventing movement of the lat the studs 39 forming guides and the slots 38 ter under the in?uence of said spring, means forming guideways to control the reciprocatory yieldingly urging said latch into its normal slide movements of the slide bar. The operating lever, engaging position, a tripoperated by said lever, which is pivoted at M on an abutment 42 on the 65 for disengaging said latch from the slide and, bracket I B, is formed with telescoping sections permitting limited movement ‘of the slide under to compensate for the pivotal movement of the the in?uence of the spring, said trip being posi lever. tioned in the path of said slide and limiting the What is claimed is: movement of the latter by the spring when the 1. In a thread marking machine having a base 70 lever is fully depressed and said trip being dis for supporting fabrics to be marked, a knotter engageable from the slide by retraction of the mechanism below said base, a reciprocatory rack operating lever to permit completion of the move bar for actuating said knotter, a thread-carrying ment of the slide under the in?uence of the needle, a depressible operating lever for advancing spring, and means operable by the operating lever said needle and thread through fabrics on the~ 75 during the completion of its retracted movement 2,412,768 position, ' " mounted for reciprocation on said bracket, the combination of a spring for moving said slide - 4. In a thread marking ‘machine having a base on which the fabrics to be marked are supported, a knotter mechanism below said base, a thread 8 hanging said base and a ‘knotter actuator slide for restoring said slide to its normally locked in one direction and an abutment on said slide, a 5 latch pivoted in the bottom of said armand yieldingly urged upwardly into engagement with carrying needle, a depressible operating lever for said vslide abutment for normally preventing ' moving said needle and thread from a point above movement of the slide under the in?uence of said the base through the fabrics to a position for spring, a pin adjustable in said lever and mov engagement of the thread by the knotter below the base, and a reciprocatory slide for actuating ll) able into engagement with said latch upon de pression of the lever to release said slide abut said knotter mechanism, the combination of a ment, said pin being positioned in the path of spring for moving said slide in one direction, a said slide abutment when the lever is fully dev lateral projection on said slide, a latch yieldingly pressed at a point to permit said abutment to held in the path of said projection and normally move out of its latch engaging position while still preventing movement of the slide under the in preventing completion of the movement of the ?uence of said spring, a pin movable by the de slide under the influence of said spring, said pin pression of the operating lever into engagement being movable out of the path of said slide abut with said latch to disengage the latter from en ment upon the initial retractive movement of the gagement with the projection on the slide, said lever, to permit completion of the movement of pin being positioned in the path of the projection the slide under the in?uence of the spring,»and on the slide when the operating lever is fully means operable by the‘ operating lever during depressed and said latch is released for permitting the completion of the retractive movement of the a limited movement of the slide under the in latter for restoring said slide and its abutment ?uence of the spring whereby said projection is moved out of its latch-engaging position and said 25 in latch-engaging position. 6. In a thread marking machine having a base pin being movable out of engagement with said slide, projection by the initial return movement oiithe operating lever whereby the movement of said slide by said spring‘ is completed, and on which the fabrics to be marked are supported, a knotter mechanism below said base, a thread carrying needle, a depressible operating lever for means operable by the retraction of said operat 30 moving said needle and thread into and out of operative association with the knotter mech ing lever for moving said slide in the opposite direction and restoring the same with the pro jection of said slide in latch-engaging position. 5. In a thread marking machine having a base on which the fabrics to be marked are supported, “ a knotter mechanism below the base, a thread carrying needle, a depressible operating lever for moving said needle and thread from a point above , the base through the fabrics to a position for anis'm, a reciprocatory rack bar for actuating said knotter mechanism and a reciprocatory actuator slide for reciprocating said rackbar, driving connections between said rack bar and slide consisting of a pair of gears having a com— mon center of rotation, one of said gears engag ing said rack bar and a rack bar formed on said slide and engaging the other of said gears. engagement of the thread by the knotter mech anism below the base, a supporting bracket over JACOB DASHEW.