US2274721A - Sewing machine attachment - Google Patents

Description

March 3, 1942. n. MARINSKY Erm.V 21,274,721

` l SEWING MACHINE ATFIACI'HVIENTl Filed May 25, 19.7.8 3 Sheets- Sheet l Match 3, .1942.1 D. MARlNsKY E11-AL VsEzwING MACHINE ATTACHMENT s sheets-sheet 2 Filed May 25, 1938 DAws MARmsKv BFouls H MoRm TT 9T A M1 w @Y w INVENTOR ATTORNEY 1 March 3, 1942.

D. MARlN'skY ETAL l2,274,721 y SEWING MACHINE ATTACHMENT y Filed May 25, 1938 3 Sheets-Sheet 3.

lNVENTOR DAVIS MARINSKY Lows H MORIN @2 5 ATTORNEY Patented Mar. ,3, 19x42 SEWING MACHINE ATTACHMENT Davis Marinsky and Louis H. Morin, Bronx, N. Y.

i Application May 25, 1938, Serial No. 209,889

4 .Claims.

This invention relates to sewing machines and particularly to what might be termed attachments to machines of this type to convert a standard machine into a stitchingmachine designed to perform certain specific functions, such for example as attaching one or more cords or strands to an elongated tape, for example, the Stringer tape of a separable fastener, and also in vlaying another strand on the ytape or cord and arranged longitudinally thereof in the stitching operation, and in retaining the last mentioned strand in position by the stitches employed in securing the cord or cords to the tape. `More particularly, the attachment comprises means for positively and adjustably controlling the feed of the workpiece through the machine as well as means for guiding the lay of the strand on the workpiece or the cord attached thereto, as well as in the provision of a series of switches coop-l erating with the various strands and the workpiece fed into the machine to automatically stop the machine upon the consumption thereof or in the event of breakage occurring therein. The

-novel features of the invention will be best understood from the following description and annexed drawings in which one embodiment of the invention is disclosed, and in which the separate parts of the machine are designated by suitable reference characters in each of the views, and in which:

' Fig. l is a front view of a machine made according to our invention with parts of the construction broken away and in section.

Fig. 1A is a sectional detail view showing part of the gearing employed in the attachment.

Fig. 2 is a plan and sectional view showing the various attachments as applied to the table of the machine and omitting the frame of the sewing machine proper.

Fig. 3 is a sectional view substantially onlthe line 3-3 of Fig. 2 on an enlarged scale.`

' Fig. 4 is a view similar to Fig. 3 showingcertain parts on an enlarged scale.

Fig. 5 is a partial section on the line 5-5 of Fig'. 4.

Fig. 6 -is a partial section on the lin`e 6 6 of Fig. 3. v

Fig. '7 is an enlarged detail v iew of a part of the construction shown .in Fig. 2 with paits of the construction broken away.

Fig. 8 is a sectional detail view showing the automatic catch for the control treadle of the machine.

Fig. 9 is a detail view of a part of the construction shown in Fig. 1 as viewed from one side of the machine. v

Fig. 10 'is a sectional detail View of a clutch drive. l

Fig. 11 is a, partial section on the line lI-ll of Fig. 10.

Fig. 12 is a perspective view diagrammatically illustrating the method of stitching two cords to a tape and in laying a strand in zigzag fashion upon one of the cords and interlocked with the stitchings. A

Fig. 13 is a diagrammatic view illustrating'the electric circuit controlling. the various switches and mechanisms of the machine; and,

Fig. 14 is a detail view of a part of atape made according to the invention, indicating the contour thereof.

For thepurpose of illustrating one method of carrying the invention into effect, we have shown in the accompanying drawings certain attachments applied to onetype and kind of sewing machine of standard construction, commonly referred to as a Singer High Speed Sewing Machine such as used in various factories and shops. In this connection, it will be understood that the fundamental and basic .principles of the attachment herein illustrated, aside` from the specic structure of certain parts, is applicable to other makes of machines of this type. In the same manner, while the present attachment is specifically designed for the performance o1 certain operations upon a predetermined workpiece which is illustrated in the accompanyingdrawings as a matter of example', it will also be apparent in this connection that the basic principles o'f the various attachments are applicable for the performance of similar functions upon different kinds and classes of workpieces wherein the principles of operation herein shown and described' are applicable.` that the drawings and following description are illustrative of one method of carrying our invention into effect.

In the drawings, l5 represents the table or work bench of a factory machine and is usually composed of wood. This work bench or tableis Lsimply re-cut to adapt the various attachments thereto substantially in accordance with he structure later described. At IB in Fig. 1 of the drawings, is diagrammatically illustrated the frame of the sewing machine proper, the arm of the frame being indicated at H, and the vertical head at the free end ofthe arm at I8. At I9 is shown a base plate of i the frame'which is arranged in and supported in connection with the It will thus be apparent with a pulley 23 on the motor shaft and a pulley 24 on the drive shaft. Arranged beneath rthe base plate I9 is the usual driven shaft 25, commonly termed the hook shaft, gared tothe'ishaft 2| through the vertical shaft 26 and the interengaging bevelled gears on the v'respective'V shafts as seen at 21 and 26,in Fig. 1 ofthe drawings.

l v At 29 and 30 are the guide rollers over'whih the needle thread 3| passes prior to passing through the usual guides on the head |8 and theny being threaded through the needle 32 of the machine, note Fig. 4. At 33 is shown the' rocker shaft arranged and supported upon the under surface of the base pme is; and at s4 is shown the lusual presser foot operating rod supported in the head I8. At 35 is shown diagrammatically the bobbin case of the machine.

- All of the above ,described mechanisms, which represent the main parts of th@ machine in connection with which our attachment operates, are ld and well known in the art; and are simply diagrammatically illustrated in order Ito understand the association of the various vattachme'nts\(. l

with such parts in order that the operation of the attachment will be clearly understood.l At this'time, it is also well to mention that the usual workpiece feed mechanism is removed -as well as theusual presser foot. substituted for the presser foot is a workpiece guide 36 which is supported in connection with the rod 34 and serves to V'guide the tape 31 in its movement beneath the needle 32 of the machine, as well as to guide the iop and bottom cords or strands 38 and 33 to dispose the same above and below the tape 31 at one edge portion of the tape. At' this time it will be well to note that one of the strands'will be twisted in one direction, for example to the right, and the other strand will be twisted to the left in order to maintain a balance as between said cords and the tape to avoid undesirable distortions, but, however, not to interfere with a desired curve formed in the tape as a whole by virtue of the stitching operation: the curvature 'of the resulting stitched product being indicated in Fig. 14 of the drawings. f

In addition to the particularstitching operation which is to be performed to,attach the cords I or strands 38 and 39 to the tape 31 as diagrammticany illustrated in Fig. 12 of the drawings 1f-.by the needle tnread 3|, it is also desirable to ffemploy as the bobbin thread 40, aspecial form lief strand. v This may be what we commonly term the laterally oiset or zigzag appearance as at 4 la in Fig. 12 of the drawings.

'Ihe workpiece guide 36, see Fig. 4, consists of a wide plate having a fixed guide block 36a at one side thereof which 'guides the edge of the" tape31 to which the cords are attached and also guides the position 'of the upper cord 38 whereas the other edge of the tape 31 is guidedby an adjustable block 36h which will compensate for strips of different widths, the plate 38 having anelongated aperture 36e to provide for this adjustment. The forward end of the guide plate 36 extends upwardly aspseen in Fig. 4; and a transverse strip 36d is arranged to support the tape 31 is raised position just forwardly of the needle so as to provide, a free passage of the tape as well as the top and bottom cords 38 and 35 into position beneath ,thel needle; the cord 33 being guided into position beneath the plate throughthe eye or other guide 42. The plate 36 has a large aperture 36e in the upper surf-ace thereof through which the needle 32 passes as well as the strand 4| Supported upon the rod, 3'4 is an oscillating lever 43 having a forked end 43a and a hook end 43h, the latter having a recess -as seenfat 43e to receive the strand 4| 4to lay the same inv the zigzag fashion diagrammatically illustrated in Fig. 12 of the drawings by moving the strand intermittently across the path of the needle after each stitching operation of the needle so that the strand 4| will beheld in position in the zigzag lay by the stitches 3|a; that is to say,

At this time it is desirable to call attention'to after one downward movement of the needle.' the strand 4| for example, will be moved to the left, viewing the machine from the front sidethereof, vand then after the next stitching operation., the

strand 4| will be moved to the right, and this operation continues throughout the entire length o'f the stitching operation. It will, of course, be apparent that the machinel may be seo timed as to perform alternate transverse movements of the strand every other stitch, but the structure as described is preferred in order to securely arrange the strand 4| upon the cord 38. It will theI recess 43c downwardly through the aperture 36e in the plate 36, as will appear in Fig. 4 of the drawings.

the fact that one of the features of the invention resides in the provision of a machine which may i be termed automatic in operation; that is to say,

fter the machine has been put into-pperation'- t will continue to operate without the care and ,l ticular thread, strand, or workpiece is reached,

o'rupon the breakage of the .various elements.,

w To carry this automatic'operation into effect, we

1 userfwhen metal links are applied to the fastener,

similari-links areemployed.

In "e, stitching operation we also prefer to lay inizig'zag fashion another strand 4| upon the upper corjl,l 38. This strand will correspond to and the rayon thread when cellulose acetate or the 'companion strand 40; that is to say, when tnsel is employed at 40, a tinsel will be employed at4| j.' and'when 40 is a rayon thread or strand, 4|y will b/ef'.l corresponding thread. The

thread or strand 4| will be guided over the work-I have provided means for controlling the feed of the workpiece through the machine and particularly in providing an intermittent feed so that a constant and even arrangement of stitching will be formed ine resulting finished product; the' length of the stitches being governed by. suitable tension devices.

we provide a bracket stammenr. lu which is secured to the table of the machine and preferably arranged adjacent and in back of the head I8. 'I'he rear/'Jendportion of the bracket extends l downwardlydn the opening |5a formed in the table i5, note Fig`.- 3'., This end portion of the bracket has a transverse pivot rod 45 in connecpiece in the manner later described in forming 75 tion with which a swinging A'arm 461s mounted;

be understood that the strand 4| Apasses through -of ymay be brought into engagement with the projection 44a on the bracket 44 so. as to causeV the roller 48 to be swung upwardly to disengage it from its companion roller against the action of an adjustable spring arranged upon a rod 52 pivotally supported in connection with the bracket 44 as seen at 53.

'Ihe bracket `44 also supports a shaft 54 which projects at one side of the bracket, and arranged on the extended endis a companion feed roller 48a having an integral gear 49a, the latter being.

adapted tomesh' with the gear 49 of the roller 48. I The outer end of the shaft 54 is also preferably provided with an additional support 55 in the form of a ball clutch, note Figs. l0-and 1f; and this clutch is supported in conection with the bracket as seen at 55a. A yoke-shaped lever 56 is arranged upon the shaft 55 and also-has a ball clutch engagement with the roller 48a ras vindicated at 51. The clutch constructionis such as to provide intermittent rotation of the rollers 46, 48ain the oscillatory movement imparted'to the lever 56 by a link 58 coupling the forked end of the lever 56 with a lever 33a secured to the usual oscillating shaft 33, see Fig. 3, so that in the oscillatory movement imparted to the shaft 33 as in a conventional'machine, this motion is transmitted to and utilized for the intermittent feed of the feed rollers through the ball clutch structure employed in connection with the roller 48a. AIt will be understood that the rollers are rotated to feed the tape away from the needle, as will be apparent; and the clutch as at 51 will engage the roller in the feed thereof; whereas the clutch 55 will engage the rollerito hold it against rotation in the oscillatory movement of the lever 56 as will be apparent.

The shaft 54 extends through the opposite end of the bracket 44 and has thereon a worm 54a which engages a wormgear 59`on a vertically arranged crank shaft 60 supported in the bracket 44, note Fig. 2. Coupled eccentrically with the crank shaft 60 is one end of a connecting rod 6|, the other end 6|a of which is adjustably supported in an oscillatory arm 62 or in an elongated slot 62a in said arm. The adjustment here provided is to control and regulate the operation of a switch tripping disc 63 which is adjustably supported on another vertical shaft 63h, supported inthe bracket 44, and which is intermittently actuated through the arm 62 by a ball clutch construction as indicated at 65, see Fig. 7, similar to the ball clutches 55, 51, to provide the constant feed of the trip disc 63 in one direction so that the trip 63a of the disc will actuate ay contr-,ol switch 64l at the completion of each cycle of revolution of the dis'c 63 to automatically stop the machine, it beingunderstood that the disc 63 isset in the startingsposition indicated in `Fig. 2

of the drawings by manually rotating the same. This switch is employed to` stop the machine just prior to the consumption of the bobbin thread.,

or in other words, the tins` and rayon'thread a new bobbin; the adjustment of the rod'or linkl 6| being provided to compensate for various lengths of the bobbin thread as will be apparent.` While these bobbins will require replacement l from time to time in the automatic operation of the' machine, one operator may nevertheless care for numerous machines by. reason of the time factor required in the consumption of the bobbin thread.

AArranged on the bracket 44 is a gear housing 66 in which is supportedI a vertical shaft 61, the lower end of which extendsthrough the plate I9 and has a bevelled Igear 68 meshing with a bevelledgear 69 secured to the shaft 25. On the shaft 61 is a pinion 10 ,meshing with a large gear.

. 1| arranged on a shaft. 12, seev Figs.` 1A and 6';

the'gear1| meshing with another gear 13 on a` crank shaft 14 carrying an eccentric, swiveled and grooved block 15 in connection with which the forked end 43a of the lever 43 operates to impart the reciprocating motion to the tinsel or rayon guide hook 43b controlling theu lay of ,thestrand 4|.- While the gearing employed is such as to provide the lay of the strand `4| as illustrated diagrammatically in Fig. 12` of the draw-.- ings, Ait may be modified to suit other forms of construction, the only essential feature being that the strand-4| be arranged out of the path of Vthe vneedle in thestitching operation of said needle.l It will also appear from a consideration of'Fg. 2 of the drawings that the housing 66 forms a support forthe switch 64. It will thus be seen that the entire feed mechanism be- ,comes a part of the bracket structure and may be readily attached and detached from the machine by simply making the -necessary connections with the various operating and supporting links or shafts. This materially simplifies the installation of the ,attachment insofar as this operating mechanism is concerned. While parts of the mechanisms are arranged invhousings, it will be understood that substantially the entire attachment may be arranged in a housing or hood Vto conceal and protect the same; suiiicient openings being provided to adjust the various parts and assemble the workpieces as will be apparent. i

Supported beneath the tableA |5 of the machine on the upright sides |5b thereof are rods 16, 16a, for detachably supporting spools 11, 11a upon. which are arranged the - cords 38 and 39, respectively. These cords extend upwardly through eyelets or apertures 18, 18a, formed in the table, note Fig. 1; and then pass through switch devices y 19, 19a, for automatically stopping the` machine when the ends of the cords 38, 39 are reached or in-the event of a breakage in the cords. The switch devices 19, 19a have switch arms 80, 80a which are supported in open circuit position by the passage of the cords 38, 39,`therebeneath.

Another switch device 8| is supported in open circuit position bythe thread 3|, see Fig. 1; the switch 8| being in the 'form of a pivoted lever supported in open position by a wire link 82 having an eye at its Vfree end through'which' the thread 3| passes. The other-end of the lever has a light spring 83 engaging the same so that after the 'thread 3| is consumed at a point between the rollers 29 and 30. the link 82 is released and the spring 83 will move the switch 8| into closed circuit position. Another switch 84 is provided 'to control the tinsel, rayon or other strand 4|-,

which comes from av spool 4|@ supported above the head I8 of the machine. Afte'i` passing through an` adjustable tension device |15, the

thread passes under an end 84a of a freely piv-l oted switch' lever 84, see Fig. 9, the thread passing'over two guides 86, at opposite sides of the end 84 so that the thread 4| is consumed or breaks between the guides 86,'the lever 84 will drop by gravity to complete the circuit which will stop the machine.

The cords 38 and 38 alsopass through adjustable tension devices 81, 81a, note Fig. 2, which are similar to the conventional thread tension coupled with' the dog m is the core m of a solenoid |08 which is in circuit with al1 of the switchdevices 84, 18, 18a, 8|, 84, 86, so thatupon the completion rof the circuit through any of such switch devices, the core |01 will-be drawn inwardly and the dog.` |06 released to permit automatic movement of the treadle to the stop devices commonly, employed in'sewing machinesH and similar tothe devices 85. As th'ese devices are well known, no specific description thereof is deemed necessary. The switch mechanism'84,

' tensiondevice 85 and the roller 4|a, are all supported in a bracket 88 attached to the head I8, asl

noted in Figs. 1 and 9 of .the'drawings Another bracket or plate 88 is secured to the table I5 forwardly and in direct alinement with the needle of the machine. In this bracket is a fixed tape guide 80 and an adjustable tape guide 8|, note Fig. 2, to aid in guiding the tape into and through the machine, and especially -into the plate 36..

Adjacent the guides 80, 9|, is an adjustable ten-v sion plate 82, the tension of which is controlled by a spring 83 arranged on an upwardly extending pin 84 with anadjustable milled nut 85 on the pin to regulate the tension of the spring 83. By increasing and decreasing the frictional engagement of the tension plate 82 with the tape 31 the tension on the tape will be controlled and thus a constant length of the stitches 3|a may` be maintained. The stitch' length is regulated through the usual means of a sewing machine, which controls the oscillation of the shaft 33.

This means is not shown as it forms no part of the invention.

Also arranged upon the bracket or plate 88, see Figs. 2 and 3, is a gravity operating switch arm 86 disposed between two raised tapesupporting surfaces 81 So that when the end of the tape is reached, the circuit through the switch -86 will be closed and the machine automatically stopped. This switch is arranged suiliciently in advance of the needle to cause the machine to stop before the end of the tape has been reached. On the bracket 88 is a tape guide pin 88 around which the tape passes when disposed in a vertical position and the tape being twisted upon entering the guides 80, 8|, and in passing beneath the switch 86. The supply of tape comes from a spool or reel 88 supported on the top of the table v|5 at the left of the machine.

0n each of the pins 16, 16a, supporting the spools 11, 11a, are detachable plugs |00, llllla, .i

by means of which the spools 11, 11a, may be quickly attached and detached in renewing the supply of cord in the use of the machine. At |0| is sh'own a main switch which controls the supply of electric energy to the motor 20 from a source of supply .as diagrammatically illustrati. ed in Fig. 13. It is also preferred that a transformer |02 be employed in the circuit to the position in which operation the 'rod |08 coupled with the treadle orv the extension |05 actuates th'e usual combination clutch and brake mechanismof thev motor 20, commonly employed in machines of the type under consideration, which mechanism isdiagrammatically illustrated at ||0 in Fig. 13 of the drawings to declutch the motor 'from the drive of the machine and to -quickly brake and -retard the machine operation. Also 'included in the'circuit to the Solenoid |08 is -an electric bulb which is arranged in a suitvand 40, -as well as the strand 4|, are threaded through the machine in the manner illustrated,

and the` parts 31, 38' and 38 brought into position beneath the plate 36..., I f desired, the initial operations of the machine in beginning the stitching of th'e cords 38 and 38 to the edge various switchdevices in order to cut down the voltage of such devices `as will be. apparent. In

'Fig 8 of the drawings, we have diagrammati# cally illustrated the foottreadle |03 of the machine which is pivotecf as at- |04' and attached to the treadle is a rearwardly projecting catch'` rod or nger` |05 adapted to engage a spring actuated pivoted dog |06 to hold the treadle |03 in a depressedV or operating I'position to provide the continuous automatic operation of the` machine withoutthe care or attention of the operator.

of the tape may be started by hand until such tim-e'that the tape protrudes suillciently to bev passed between the feed rollers 48, 48a. The

roller 48 will be raised by actuating the lever 50 to permit the placement of the tape between said rollers.. Both of these rollers are grooved yas indicated at 48h, note Figs. 2 and 11, to receive thevcorded edges of the tape, and when in proper position the lever 50 is returned to pr/ovide tensional engagement of the roller 48 with the workstrip or tape 31 after which .the treadle |03 may be depressed and set into.its

maken position as indicated in Fig.A s and the machinewil-l continue to operate automatically.

In the above operation, the disc 63 is set in the positlonshown in Fig. 2 of the drawings. Upon completing one revolution of the disc 83, which of c ourse rotates very slowly due to the particular type of intermittent feed provided, the amount of thread 40 from the bobbin willhave been consumed or substantially consumed and v the machine will then be automatically stopped by the tripping of the switch I64. The above operation will be repeated several times during the consumption of a full ligth of the workpiece or tape 31. When the latterhas been consumed, the actuationV of the switch 86 will automatically stop th'e machine and a new supply of the tape will be' inserted in the machine. If desired, the.- end of one tape lmay be attached to the end of the other tape to form continuous tape lengths. A thin gummed tape may be used for this purpose. cords or strands 38 and 38, the machine being automatically stopped on the consumption'of -either or both' lof thes strands through the op'- eration of the switches 18, 18a, or the switch elements 80, a,thereof.

In the event of the consumption of the thread.

3| or breakage in this thread, the switchv 8| The same applies to the renewal of the will be automatically operated to stop the machine for the renewal thereof; see Fig. 1 and the same also applies to the strand 4| ,which is controlled through the switch 84.

From the foregoing it will be apparent that the machine is entirely automatic; thus mate.

2. A stitching machine for producing a beaded rially economizing on the cost of producing stringer tapes of the character under consideration especially from the standpoint that a single attendant can care for the necessary renewals required in a large series of machines.

Of course, the skill of an operator insofar as thereof, said machine having means for forming a stitching, means for guiding a tape through the stitching means, means for guiding two cords ing means with one cord disposed above and the other cord below the Atape and with both cords at one edge portion thereof whereby both cords will be stitched to thetape in one line of stitching, separate adjustable tension devices engaging the tape and each of said cords to controlA the degree of curvature of the resulting stringer tape and the line-of stitching employed in securing the parts together, and means for laying a metallic strand in zigzag fashion upon one of said cords and retained thereon by said line of stitching.

3. In a sewing machine for producing a beaded edge tape, means for forming a stitching, means for guiding a tape through'th'e stitching means, means for guiding two cords through the stitching the structure ofthe plate 38 and the rollers- 48, 48a, the machine may be adapted to workpieces of various kinds and classesespecially in the production of workpieces of great `length where automatic machine operation of this type and kind is desirable.

The intermittent feed of the tape operates in synchronism with the needle operation in order to maintain the proper pull on the tape with respect to the stitching operation. It will be apparent that the tension on the cords, also contributes to some degree in controlling the curvature of the resultingtape.

Having fully described our invention what w claim as new and desire to secure by Letters Patent, is:

1. A stitching machine for producing a beaded edge tape for separable fastener stringers wherein the tape is curved throughout the length thereof, said machine having means for forming a stitching, means for guiding a tape through the stitching means, means for guiding two cords twisted in opposite directions through the stitching means with one cord disposed above and the other cord below .the tape and with both cords at onevedge portion thereof` whereby both cords will be stitched to the tape in one line of stitching, and separate adjustable tension devices engaging the tape and each of said cords to control the degree of curvature of the resulting Stringer tape and the line of stitching employed in securingth'e parts together.

ing means with one cord disposed above 'and the other below the tape and with both'- cords at vone edge portion of the tape whereby -both cords will be stitched to the tapein one line of. stitching, feed rollers arranged in spaced relation to the stitching means, and forming the sole means of feeding the tape and cords through the machine, and separate adjustable tension devices :twisted in opposite directions through the stitchengaging the tape and leach of said cords fed through said stitching means by said rollers.'

4. In a sewing machine for producing a beaded edge tape, means for forming a stitching, means for guiding a tape through the stitching means,

means for guiding two cords through the stitching meansiwith one cord disposed above and the Aother below the tape and with both cords at one edge portion of the tape whereby both cords -Will be stitched to the tape in one line of stitching, feed rollers arranged in spaced relation to the stitching means, and forming the sole means of feeding the tape and cords through the machine, separate adjustable tension devices engaging the tape and each of said cords fed through said stitching means by said rollers, and

y means in operative engagement withLthe4 ma- 'cords stitched to said tape.

DAVIS MARINSKY. LOUIS H. MORIN.

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