US1941858A - Sewing machine attachment - Google Patents

Description

Jan. 2, 1934. Q GOSMAN ,9

SEWING MACHINE ATTACHMENT Filed April 14, 1935 3 Sheets-Sheet l Inventor 0s/&er asvzz 22/ Jan. 2, 1934.

( 3. GOSMAN SEWI NG MACHINE ATTACHMENT Filed April 14, 1953 3 Sheets-Sheet 2 Jan. 2, O GOSMAN 1,941,858

SEWING MACHINE ATTACHMENT FiledApril 14, 1933 3 Sheets-Sheet 3 lnvenior asker 'osflza 72/ Patented Jan. 2, 1934v 1 UNITED :s'rA r1 This invention relates to sewing machines and more particularly to-that-type of sewing machine especiallyadapted for use in the making of 'belt I accommodating loopsfortrousers.

In accordancewith thepresent-inventionmeans is providedfor ready attachment to such a type of machine for cutting the cloth from which the loops aremade into a-strip of the desired width thereby insuring the making of belt loops ofunif orm width.

Briefly the inventionconsists in the provision of a feeding device and a cutting device adapted to cooperate with the usual feeding device ofthe machine in a manner to insure-'the'placing'of the cloth under proper tension during the cutting operation.

Further the invention-consistsin the'provision of a-meter'for attachment to-the machine so that the operator may readilyascertaimwhen a suitable length of thematerial-has been cutand sewed blade. 7

formaking' a predetermined number" of belt loops.

The invention together with its numerous .objects and advantages will be best understood from a study of the following description taken in connection with the accompanying drawings wherein: 7 g

Figure 1 is a topplanview of asewing machine having the attachment-applied thereto.

Figure 2 is-a fragmentary plan view ofa portion of the machineshowing theattachment applied thereto and with certain parts 'of the machine removed;

Figure 3 is a view -somewhat=similar=toFigure 2 with thebasegplateof "the machine removed.

Figure 4 is a sectional View -taken substantially on the line 4-4 ofFigure 3.

Figure 5 is a side '-elevational view of a cam operated arm to be hereinafter more fully referred'to. V V

Figure 6 is 'a fragmentary "side j elevational view of a feed device forming part of the invention, with certain p'artsbrokenlaway and shown in section.

Figure 7 is .abottom plan view'o'f the .tooth equippedhead of the feeddevice. t

Figure 8 isa-side elevational view thereof. Figure 9 is a plan-view of a portion of theusual cam shaft.- r I Figure 10 is "asectional view taken'substantially ontherline :10-*l0 of 'Figure9. I Figure 11 is'asectionalview taken-substantially on thelinell-llof Figure '2. i V

Figure 12 is a perspective view of the knife Figure I3 is a side=e1evationalview aof the cloth guide. r

Figure 14 is a plan view-of a portion of the cloth showing a a part thereof a folded and stitched as is customary T in the. making of loops, and another portion thereof slit in accordance with the present invention.

Figure '1'5is-a transverse sectional view taken substantially on the line 1515 of' Figure 14.

Fig ure 'lfi is a fragmentary sectionaleleva tional view showing the meteras appliedto the machine. 1

Referring to the drawings by reference numerals, "reference will be had particularly only to those parts of the conventional sewing machine with which theinvention' is concerned. In this connection it will'be'seen'that'the sewing machine designated generally by the reference character 10 includes among parts the base plate 11, the cloth a guiding and folding member 12, pressure foot 13, the feed'member 14 forfeeding the cloth throughthe machin'eandbeneath the presser foot 13, arm 15': carryingthe feedmember 14, shaft 16suitably journalled in bearing ears provided therefore at 1 the rear edge of the base plate llythe plate 1 7 pivotally connected with the shaft lfi and provided at itsupper edge with hearing sleeves 18' in "which are fixed the-ends of a shaft l9 and towvhich shaft is pivotednne end of the-feed arm 15. ln addition the sewing machine is equipped'with the usual drive shaft 20 that, as is conventional, is provided with the cam'ZLWith which the arm lfadsengagedinthe usual -manner for actuating the arm to feed the cloth through the guide and to the'needles of the machine ina well'known manner.

"The sewing machine as above described is a conventional and well known type of machine especially adapted for sewing strips of cloth in the making of 'belt'loops and-isnot of the essence of the invention. "In using this type of machine itis first necessaryto cut the vcloth into strips of'desired width and this is usually accomplished by hand with'the result'that the stripsare not always of uniform width. I

To overcome this it is now proposed, in accordance with the presentinvention to provide for the cutting 'o'fcloth of any width within reason into a strip of the proper width as the cloth is being 'fedto the'machine. 'To'this endthen I the invention consists in the provision-of 'a .de-

vice to cooperate with the conventional cloth feeding-device14 in exerting -suflicient tension on the clothes it is being fed to the machine and thereby insure a neat-rand eflic'ient cutting orslitting of the cloth into a strip of the desired width. This auxiliary feed device comprises an arm 22 which at one end is provided with an eye or sleeve 23 for pivotally engaging the arm with the pivot shaft 19 as suggested in Figure 4. Adjacent its free end the arm 22 is provided with a depending lug 24 to which is secured one end of a strip 25 of metal or other suitable material that hasits free end'paralleling the free end portion of the arm '22as shown in Figure 5. The free end of the arm 22 and the free end of the strip 25 are adapted to straddle a cam 26 provided on the shaft 20 in accordance with the.

present invention and disposed at the proper angular relation with respect to the cam 21. An arcuate arm 27 is secured at one end as at:2 8 to the free end of the arm 22 and this arm 2'7 is divided adjacent its fixed end'into two sections pivotally connected as at 29. A suitable spring 30 engages the convex edge of the arm 27 and bridges the joint between the sections of thearm in a manner to normally urge the free section of the arm downwardly- :and in alinement with the-fixedseotion of the arm. At one end the spring 30 is anchored as at 31 to thefixed section of the arm27;

At its free end the arm 27 is provided with a tooth equipped head disposedin advance of the cloth feeding device 14 and in substantial alinementwiththe saidcloth feeding device 14 to engage the top face of the cloth. andvthereby cooperate with the feeding device 14 for feeding the cloth through the machine and at the same time place a desired tension upon the cloth during the actual slitting or cutting operation. The said head on the arm 2'7 is designated bythe reference numeral 32 and as clearly shown in Figures 7 and 8 comprises a'body platethat is bolted or otherwise secured to the free end of the arm 27 and is equipped with laterally spaced relatively short toothed bars 33 and a relatively elongated intermediate toothed bar 34. r

The cutting device includes an arm'35 that at one end'is provided with an eye or sleeve 36 for pivotal engagement with the shaft lfi as shown in Figure4. At its free end the'arm extends upwardly and forwardly as at'37 and cooperates with the free end of a strip 38 secured to an intermediate portion of the arm 35 to straddle a third cam 39 provided on the shaft 20 and disposed at the same angle as the cam 21 with reference to the cam 26. g v i .To the free end 37 of the arm 35 thereissecured one end of an angulararm 40, saidone end of the arm being anchored to the end37 ofarm 35 asat 41. The free end of the arm 40 is provided with bolt and nut'means- 42-for engaging the slotted end of a knife blade 43 for securing the blade 43 at the desired vertical adjustment on the arm 40. The free-end of the arm 40 terminates adjacent the free endof the aforementioned 21111127101 supporting the knife 43in a'manner to cooperate with a; knife blade 44- embedded in the inner side of the'combined guide and folding member 12 as will be clear from a study of Figure 11. s, 1 As. shown in Figure 3 the arm 22 is normally urged toward'the arm 15 through the medium of a spring .45disposed about the shaft 19 andbearing against the proximate end of the arm 22.

- As is also conventional, the plate 17 is caused to rock back and forth, motion being transmitted thereto from the camshaft 20 through the medium of a disk 46' provided on oneen'd of the shaft and havingeccentrically connected thereto an arm 47 which is pivotally connected to an arm 48 extending from one end of the plate 17 as will be clear from a study of Figure 3.

In operation the cloth of any suitable length and width is fed through the machine passing through the combined guide and folding'member 12. Obviously in the feeding of the cloth the arm 15 carrying the cloth engaging and feeding member 14' is caused'to oscil1ate,.and upon its forward and upward movement engages the under side of the cloth to draw the cloth through the machine as the arm 15 moves rearwardly and downwardly. Injthis connection it will be noted that the arm 22 through the medium of the cam connection between the arm and the shaft 20 and the rocking movement of the plate 17 has a movement substantially similar to the arm 15 with a result, that as the member 14 associated with the arm 15 moves up to engage the under side of the cloth, the arm 22 moves downwardly and forwardly so that thetoothedbars 33, 34 engage the top side of the cloth in advance of the member 14 and at about the same time that the member 14 engages the under sideof thecloth. Similarly the arm 22 and its associated parts rise and move rearwardly at substantially the same time that The arm 35 through the medium of the cam connection between said arm 35 and shaft 20 will' of course have only a rocking movement giving a vertical up and down movement to the knife 43, the knife 43 moving downwardly and cutting the cloth as the toothed equipped elements 32 and 14 engage the cloth and draw it forwardly through the machine. Upon releaseof the cloth by the tooth equipped elements 14 and 32 the movement of the knife 431s upwardly so that it will be seen that; during each actual cutting stroke of theknife the cloth is under sufficient tension to insure a smooth cutting operation and a cutting of the cloth 45 into auniform strip.

- Thereis also provided on'one side of the guide 12 in accordance withthe presentinvention a combined shield and deflector 49 againstwhich the unused portion 45a .of the cloth is directed as the feeding and cutting of the .cloth takes place. 1 Shield 49 serves to guide the unused portion 45a' of theclothoutwardly and downwardly so as not to interfere with either the feeding or cutting operation.

As is well known, and 'as clearly shown in Figures 14 and 15 as thecloth passes through the combined guide and folding member 12 the cloth is folded in a manner clearly shown-in Figure 15 and the folded and stitched portion of thecloth is then cut at intervals into relatively short strips of suitable length for use as belt,loops of thetype that are usually stitched onto the waist of trousers for accommodating a supporting belt. To insure positive andefficient cooperation between the fiied knife blade 44and the knife blade 43 thereis provided a spring tension device engaging one side of the ar m40 for urging the arm in the direction ofjthe arm 27. Such spring tension device in the present instance, and as shown in Figures land 2 consists of a standard 50 rising from the plate 11 and having swivelly connected with its upper end an adjusting screw 51 having screw threadedly engaged therewith a nut 52. Extending laterally from the arm 40 is a pin 53 and a coil spring 54 has one end disposed about the pin 53 and abutting the arm 40, while the other end of the spring is disposed ill) about the screw 51 and seats against the nut 52. Obviously by screwing the nut 52 relative to the screw 51 in the desired direction tension of the 7 spring 54 may be adjusted as found desirable.

In accordance with the present invention there is also provided a meter designated generally by the reference numeral 55 and this meter is for the purpose of enabling the operator to determine when a suitable. length of cloth has been folded and stitched and as would be necessary for making a predetermined number of belt loops. In the present instance I have shown the meter. 55 having a driving connection with the shaft 20 through the medium of gearing 56 and a universal connection designated generally by the reference numeral 57 and of a well'known type. The details of the meter structure are not of the essence of the present invention and in the present instance the meter 55 is somewhat similar to a speedometer of a known type and is so adjusted that the meter reading will change one digit when a predetermined length of the cloth has been folded and stitched into strip form. Thus for example assuming that to make twenty four belt loops it would require a strip twenty seven inches long, the meter would be so set that when approximately twenty seven inches of the cloth has been folded and stitched into proper strip form the meter reading will change one digit, and obviously when the reading so changes the operator then is visually informed that a sufficient portion of the cloth has been folded and stitched into a strip of the required length.

While I have herein shown and described the preferred embodiment of the invention it is to be understood that it is in nowise intended to restrict the invention to the precise details, combination, construction and arrangement of elements as shown and described other than may be necessary to teach the requirements of the prior art and scope of the appended claims.

Having thus described my invention, what I claim as new is:

l. A sewing machine including in combination, a presser foot, a pivot shaft, a plate connected with the pivot shaft, a shaft carried by the pivot plate,a cam equipped shaft, an operating connection between said cam equipped shaft and said plate for rocking the latter upon rotation of the cam equipped shaft, a feeding in finger arranged to engage the under side of the fabric for feeding the fabric forwardly beneath the presser foot, a rocker arm supporting said finger pivotally connected with the plate supported shaft and being also provided intermediate its ends with means for engaging a cam on the cam shaft, a second feeding in finger disposed forwardly of the first named feeding in finger and arranged to engage the top face of the fabric and to cooperate with the first named feeding in'finger for feeding the cloth forward beneath the presser foot, a rocker arm for the second named feeding in finger pivotally connected with the plate carried shaft, means on the rocker arm of the second named feeding in finger for engaging a second cam on said cam shaft, a rocker arm pivotally connected at one end to said pivot shaft, means on the last named rocker arm engaging a third cam on said cam shaft, a knife carrying member secured tothe last named rocker arm, and a knife carried by said knife carrying member for severing the fabric lengthwise thereof as it is fed forward beneath the presser foot.

'2. Asewing machine including in combination beneath the presser foot, a pivot shaft, a plate connected with the pivot shaft, a shaft carried by said plate, a cam equipped shaft, an operating connection betweenthe cam equipped shaft and the plate for rocking the latter upon rotation of the cam equipped shaft, a feeding in finger arranged in operative position to the combined guide and folding member to engage the under side of the fabric for feeding the fabric through said member, a rocker arm supporting said finger and pivotally connected with the plate supported shaft, said rocker arm being also provided intermediate its ends with means for engaging a cam on the cam shaft, a second feeding in finger disposed forwardly of the first named feeding in finger and arranged to engage thetop face of the fabric to cooperate with the first named feeding in finger for feeding the cloth, a rocker arm for the second named feeding in finger pivotally connected with the plate carried shaft, means on the rocker arm of thesecond named feeding in finger for engaging a second cam on said cam shaft, a rocker arm pivotallyconnected at one end to said pivot shaft, means on the last named rocker arm for engaging a third cam on said cam shaft, and a cutting device carried by the last named rocker arm for severing the fabric lengthwise thereof as it passes through said combined guide and folding member.

3. A sewing machine including in combination a cam shaft, a pivot shaft mounted rearwardly of the cam shaft and parallel thereto, a plate connected with the pivot shaft, an operating connection between the cam shaft and the plate for rocking the latter upon rotation of the cam shaft, a

pair of spaced rocker arms pivotally connected at one end with said plate, a pair of cams on the cam shaft, means on each of said rocker arms for engaging one of said cams, a feeding in finger mounted on one of said rocker arms, a second feeding in finger mounted on the other of said rocker arms in advance of the first named feeding in finger and cooperable therewith for feeding Y cloth through the sewing machine and for exerting a tension on the cloth during the feeding thereof, a rocker arm pivotally connected at one end with the pivot shaft, a third cam on the cam shaft, means on the last named rocker arm engaging said third cam, and a trimming device carried by the last named rocker arm in proximity to the second named feeding in finger for severing the cloth as it is fed through the machine.

4. A sewing machine including in combination a folder for guiding and folding a strip as it is fed through the sewing machine, a trimming mechanism operating laterally of the folder and ineluding a knife movable relative to the folder, a

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