US2921754A - Device for winding cloth - Google Patents

Description

Jan. 19, 1960 M. TOLKIN 2,921,754

DEVICE FOR WINDING CLOTH Filed March 24, 1955 3 Sheets-Sheet 1 IN V EN TOR.

MORRIS TOLKIN I BY - jiffy FIVE Jan. 19, 1960 M. TOLKIN DEVICE FOR WINDING CLOTH 3 Sheets-Sheet 2 Filec March 24, 1955 MORRIS IN VEN TOR. TOLKIN Jan. 19, 1960 M. TOWN 2,921,754

DEVICE FOR WINDING CLOTH Filec! March 24, 1955 Moams ToLKm 3 Sheets-Sheet 3 United States Patent Q the i,921,7s4 l)EVlCE FOR WINDING CLOTH Morris Tolkin, Brooklyn, N.Y.

Application March 24, 1955, Serial No. 496,571

2 Claims. (Cl. 242-671) In commercial sewing operations, the necessity on the part of the sewing machine. operator for winding ribbons, strips of narrow fabrics, and the like upon a spool often arises. Ordinarily, a motor driven spool assembly, separate and apart from the sewing machine, is used for this purpose. 7 This may be and sometimes is located somewhat remotely from the sewing machine, thus inconveniencing the operator and resulting in loss of efiective working time, with an attendant increase in cost of the entire operation. Particularly is this true in instances in which, over the working day, the operator must wind fabric on a great number of occasions.

Still-further, under circumstances as mentioned above, the winding device, requiring its own motor and associated driving mechanisms, represents a rather substantial cost, considering the fact that the sewing machine must itself be provided with a drive motor and drive transmitting linkages extending to the machine head.

It is proposed, in view of the above, to provide a fabric winding attachment for a sewing machine, taking its drive from the sewing machine motor, and conveniently disposed at the side of the o erator where, although it will not interfere in any respect with sewing operations performed on the machine, will still be as conveniently located to the operator as is the sewing machine itself.

A more specific object of the invention is to provide, in an attachment of the type refered to, an improved driving connection between the sewing machine motor and the winding spool, which can be brought into a drive-transmitting relationship with the sewing machine motor through the swift and easy operation of a conveniently located hand or foot-controlled shifting assembly. 7

Another more specific object .of the invention is to so design the fabric winding attachment as to permit it to be secured inoperative association with a sewing ma chine without requiring modification or redesign of the machine in any way.

Yet another important object of the invention is to so relate the component parts of the drive-transmitting linkage between the sewing machine motor and the winding device as to transmit drive to the spool of the device with minimum frictional losses, thus to impose a minimum amount of strain on the sewing machine motor.

Still another object is to so form and relate the components of the drive-transmitting means as to accomplish the rotation of the spool at a desirably low speed and, further, permit slippage of the spool relative to its associated drive means should the load imposed upon the machine motor and drive means exceed a proper value.

A still further object of the invention is to provide improved means for selectively and positively shifting the driving belt for controlling the drive to the sewing machine or winding attachment.

Summarized briefly, the attachment constituting the present invention comprises a set of pulleys attachable to a shaft extension on the sewing machine head adjacent the head wheel and the sewing machine drive pulley.

2,921,754 j Patented Jan. 19, 1960 'shiftable back and forth along the shaft extension, into engagement with any desired pulley, through the medium of a shifting assembly conveniently located for manual operation. When said assembly is operated to cause rotation of the fabric winding spool, through the medium of a suitable driving connectionincluding a reduction gearing, the spool is rotated at a predetermined, relatively low rate of speed. A friction clutch, adapted to slip should the motor be placed under heavy load, is included in the drive means for the spool.

For further comprehension of the invention, and of the objects and advantages thereof, reference will be had to the following description and accompanying drawings, and to the appended claims in which the various novel features of the invention are more particularly set forth.

In the accompanying drawings forming a material part of this disclosure:

Fig. 1 is a top plan view of the winding attachment constituting one form of the invention, an associated sewing machine head being illustrated fragmentarily.

Fig. 2 is an enlarged sectional view taken longitudinally through the attachment substantially on line 2-2 of Fig. 1.

Fig. 3 is a transverse sectional view substantially on line 33 of Fig. 2. V

Fig. 4 is an enlarged, detail sectional view through the shifting assembly on line 44 of Fig. 1.

Fig. 5 is another enlarged, detail sectional view through the shifting assembly on line 55 of Fig. 1.

Fig. 6 is a perspective view of the shifting assembly per se of Fig. 1. V

Fig. 7 is an enlarged, longitudinal sectional view on line 77 of Fig. 1, through the series of pulleys mounted on the sewing machine head. I

Fig. 8 is a fragmentary top plan view, similar to Fig. 1, on an enlarged scale, showing a modified form of drive belt shifting assembly. v

Fig. 9 is a vertical sectional view taken on the plane of the line 99 of Fig. 8 and looking in the direction of the arrows, parts being broken away.

A conventional sewing machine generally designated 10 has a head equipped with the usual drive shaft 12 (Fig.

7), head wheel 14, and drive pulley 16 integral with the head wheel and secured in driving relation to shaft 12 by a set screw 18. v

In accordance with the invention, a drive shaft extension 20, coaxial with and projecting beyond drive shaft 12, is made fast. to the drive pulley 16, and hence tothe drive shaft 12. In the present instance, extension 20 is integral with the drive pulley, but this is not essential, and it is merely necessary that the shaft extension 20 be mounted in any suitable manner on the sewing machine head to project outwardly from the main drive pulley 16 in coaxial alignment with drive shaft 12.

Freely rotatable on the extension 20, next to pulley =16, is an idler or neutral position pulley 2-2, and also freely rotatable on extension 20, next to the neutral pulley, 'is double drive pulley 24 for the winding spool. Pulley 24 has a large diameter portion adjacent the neutral pulley formed with a groove 26, and a small diameter portion adjacent the outer end of the extension 20 having a beltreceiving groove 28. That side of the large diameter portion nearer the groove 28 is integrally formed with a circumferential abutment or flange 30, formed as an extension of the adjacent side wall of the groove 26. A set collar 31 is attached to the outer end of the extension 20 to prevent movement of the pulleys 22, 24 in an axial direction in respect to the shaft extension. a

The conventional sewing machine drive belt 32 is adapted, in accordance with the invention, to be shifted into driving relationship with any of thepulleys16, 22, 24; through the provision of a pair of closely spaced, parallel shift rods or arms 34, 36 confining between them the belt 32. The rods are straight and extend under the series of pulleys, as shown in Fig. 1 close to opposite sides of both flights of the belt 32.

At the ends thereof remote from the belt 32, the rods are passed through clamping blocks 38, '40 (Figs. 4 and 6); These are slotted to define spaced side walls thereon, the side walls having registering, transverse openings through which the respective rods extend.

Rig-id with the respective rods are collars 42, bearing against one of the side walls, and threaded onto'the rods are nuts 44 bearing'against the other side walls. When the nuts 44 are turned home,the side walls are forced toward one another, to clampably engage the blocks with one end of a shifting bar 46 reciprocable in a horizontal direction in a support sleeve 48 fixedly mounted upon the top 52 on which the sewing machine and the winding device are mounted. The blocks, before being fixedly engaged with the bar 46, may be rotated about the axis of the bar independently of one another into selected angular relationships, as for example that shown in Fig. 4. This angularly relates the rods 34, 36 as desired, to provide for maximum etficiency in the shifting of the belt 32 laterally in either direction by the rods.

The rods, as will be understood, are rigid with the bar 46, constituting a fork, and to move said fork back and forth for thepurpose of shifting the belt 32, a handle is provided upon the bar 46. A horizontally extending arm '54 is fixedly secured to the upper end of bracket 50, and at its free end has a closed, longitudinal guide slot 56 through which extends a finger 58 providing a handle, the finger being secured to a clamping block 60 (Fig. engaged about the bar 46 in the same manner as are the blocks 38, 40 previously described herein.

For'the purpose of transmitting drive to the winding spool there is provided a belt 62 trained about the small diameter portion of the double pulle'y,24, Within groove 28. The belt 62 passes around and drives a driven pulley 64 fixed to one end of a jack or stub shaft 66 paralleling upper end of an upstanding bracket50 bolted to a table a th'e'ma'in drive shaft 12 and shaft extension 20. The other end of shaft 66 is journalled in suitable bearingsprovided in the front and back walls of a reduction gear box 68 having an integral pedestal secured to the table top 52 as shown in Fig. 3.

. Within the gear box, the jack shaft 66 is provided with a drive gear 70, meshing with-and disposed in a plane atright angles to the plane of a larger, driven gear 78 of foam rubber or the like. The facing 78 frictionally engages one of the heads 80 of an elongated, cylindrical fabric winding spool 82 that is: freely rotatable upon the V spindle 74.' Thus, when the spindle 74 is driven, the

clutch disc will rotate, as will the facing 78, and the fac- 7 ing, frictionally engaging the adjacent end of the spool, will rotate the spool. However, the frictional engagement between the facing and the spool is not so great as to maintain atall times'a driving relationship between the spindle and spool. Instead, should the load imposed upon vthe sewing machine motor during the driving of the spool become excessivepslippage occurs between the winding spool drive pulley 24.

. 4 clutch face 78 and the spool so that there will no longer be full'drive between the spindle and the spool.

To prevent the spool from moving axially of the spindle, in a direction away from the clutch face, there is provided atthe outer end of the spindle a set collar 84 that'is secured fixedly to the spindle in contact with the outer head of the spool, by a set screw 87.

The material wound upon the spool has been shown in dotted lines at 86 in Fig. l, and can be ribbon, narrow pieces of fabric, and the like. r

In use of the device, it'will' be understood that the sewing machine can ,be operated in the normal manner, without interference from the winding attachment. Under these circumstances, the belt 32 is engaged in the groove of the sewing machine drive pulley 16. 7

If it is desired to place the sewing machine as well as the Winding attachment in neutral, that is, in such relationship to the sewing machine drive motor as will prevent either the sewing machine mechanism or the winding spool from being driven by said motor, the belt 32 is shifted into the groove of the neutral position or idler pulley 22. This is accomplished by means of the shifting assembly shown in Fig. 6. The user need merely grasp the handle 58, and move it laterally to a selected extent,

to the right, to move the belt 32 laterally out of engagement with the main or sewing machine drive pulley 16, or the idler pulley 22, into the groove 26 of the double The circumferential abutment 30 insures against the belt 32 being shifted to the right in Fig. l or 7 to an excessive extent. The belt 62, of course, is always engaged in the small diameter portion of the double pulley 24, and accordingly, belt 32 in the large diameter portion, the spool 82 will be rotated. 3

Whenever it is desired to rotate the spool 82 manually, as for example when it is to be turned in a fabric-unwinding direction, the'clutch face 78 permits slippage between the spool and the driving mechanism therefor, the inertia of said driving mechanism being such as to prevent the several component parts therefrom being rotated manually under these circumstances. Of course, even if the drive mechanism, or for that matter the double pulley 2-4, is rotated when the spool is being'turned to remove the coiled fabric therefrom, this will not interfere with the sewing machine drive in any way, since the double pulley 24 is freely rotatable upon the extension 20.

'7 Referring now to the disclosure shown'in Figs. 8 and 9, the structures are the same as those of the form of Figs. 1 to 7, inclusive, so that similar reference characters, with primes added, are used to indicate the several parts, exceptfor the modified features which will bepomted out. In this modification, instead of two .belt shifting rods or arms, such as arms 34, 36, a single shifting rod or arm 90 is provided. The rod or arm is straight and extends under the series of pulleys as shown, in Fig. 8 close to one side of both flights of the belt '32. The end' of the rod or arm 90 remote fromthe belt 32' is secured to a clamping block 91 engaged about the bar 46 in the same manner as the blocks 38, 40.: The opposite endof the rod or arm is curved slightly upwardly as indicated at 92 in Fig. 9 and then curved laterally to form a hook 93, the central portion 94 of which is twisted to a plane offset from the plane of the body of the rod or arm with the .base portion 95 of the hook and the free end portion 96 thereof on the same plane as the body of the rod or arm as shown in Fig. 9. This construction permits the hook to straddle one flight of the belt 32' with its base portion positioned on one side thereof and its free end portion on the other side, and provides an increased area in which the rod or arm isadapted to bear against the belt'when the belt is. to be shifted laterally. r

The shifting of the belt 32 is accomplished in the same manner as in they form of Figs. 1 to 7, inclusive, by manually moving the handle '58 laterally to a selected extent.

When the handle is moved to the right, as viewed in Fig. 8, the free end portion 96 of the hook engages the belt 32 and forces it into the next adjacent groove to the right, and when the handle is moved to the left the base portion 96 of the hook engages the opposite side of the belt and forces it into the next adjacent groove to the left.

While I have illustrated and described the preferred embodiments of my invention, it is to be understood that I do not limit myself to the precise constructions herein disclosed and that various changes and modifications may be made Within the scope of the invention as defined in the appended claims.

Having thus described my invention, what I claim as new, and desire to secure by United States Letters Patent is:

1. A fabric winding attachment for a sewing machine comprising a shaft, a spool mounted on said shaft and rotatable therewith, and mechanism for driving said shaft, said mechanism including a stub shaft, reduction gearing interposed between one end of said stub shaft and one end of said first-named shaft, a pulley fast to the other end of said stub shaft, and a belt encircling said pulley and encircling a double-grooved driven pulley connected to the source of power of the sewing machine and receiving the drive belt of the sewing machine, and manually actuated mechanism for connecting the double-grooved pulley with said source including a fork within which the drive belt of the sewing machine is disposed, said fork including a pair of elongated arms confining between them both flights of the said latter belt, a shifting bar carrying said arms and reciprocating in a direction transversely of the arms, the arms being connected to the bar for adjustment about the axis of the bar to selected angular relationship to one another, a stationary bracket and a sleeve carried by the bracket and receiving the bar, said bar being slidable in the direction of its length within said sleeve, said bracket including a horizontally extending ann havin a guide slot parallelling the bar, and a handle extendin radially from and made fast to the bar and extending through said slot.

6 2. In combination, a power driven sewing machine, a fabric winding attachment for said machine including a shaft and power transmission mechanism interposed between the machine and shaft including a driving pulley and an idler pulley mounted for independent rotation upon a common shaft connected to the source of power for said machine, said pulleys having faces inclined in the direction relative to said common shaft, a driven pulley connected to the shaft of said windin attachment, a belt connecting selectively said driven pulley with either said driving pulley or said idler pulley, and manually actuated means selectively shifting and maintaining the belt upon either the driving pulley or the idler pulley and vice versa, said manual means including a fork within which the belt is disposed, said fork being constituted by a pair of elongated arms confining between them both flights of the belt, a shifting bar carrying said arms and reciprocating in a direction transversely of the arms, the arms being connected to the bar for adjustment about the axis of the bar to selected angular relationship to one another, said manual means further including a stationary bracket and a sleeve carried by the bracket and receiving the bar, said bar being slidable in the direction of its length within said sleeve, said bracket including a horizontally extending arm having a guide slot paralleling the bar, and a handle extending radially from and made fast to the bar and extending through said slot.

References Cited in the file of this patent UNITED STATES PATENTS 299,915 Cumings June 3, 1884 327,407 Poland Sept. 29, 1885 969,910 Selders Sept. 13, 1910 1,211,292 Corrall Jan. 2, 1917 1,348,051 Redcay July 27, 1920 1,519,294 Cullander et a1. Dec. 16, 1924 1,968,636 Dickhaut July 31, 1934 2,135,668 Judelshon Nov. 8, 1938 2,755,675 Abel July 24, 1956

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