US1677932A - Sewing machine - Google Patents

Description

July 24, 1928.

' W. J. STEERE SEWING MACHINE Filed Dec. 15, 1925 4 Sheets-Sheet July 24, 1928.

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A l W. J. STEERE SEWING MACHINE July' 24, 1928. l

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SEWING MACHINE Filed Dec. 15, 192s Patented July 24, 1928.

1 UNITED; STATES Y WILLIAM J. STEEEIL'CEnoCKWoonfTENNEssEE, AssIGNoR To,vsoiUTnEENl-TEXTILE MACHINERY CoMrANY,oF PADUCAH, KENTUCKY, A CORPORATION or; KENTUCKY.

" ,sEwING MACHINE,"

Appnatiqn mea December 1', `51 92's. se'riax No. 680,960.

This iinvention relates to machines for unitingV fabrics, and whichl comprises, generally, a rotatable dial having a series of radially extending impaling pins for receiving and advancing the Vedgesof the fabric to be united, and a sewing mechanism including a needle and a looper acting in conjunction with each other to effect the lsewing operationfwhile the edges of the fabric are advanced by the impaling pins. n

,An object of the invention is to provide an vattachment for a `machine of the type disclosed `in the patent to 'Keyser-, 1,069,336, granted August 5, 1913. The attachment is .intended to'modify theoperation of such `a machine by causing the dial carrying the fabrics to be continuously rotated and effecting lateral movement of the thread needle and, preferably, also of the looper, while the needle is in the loopsto correspond with the movement of thev subjacent impaling ms. v p A 'further object of the Vinvention is to provide a mechanism for laterally vmoving Athe needle and looper which may'be'readily applied to the machine, and which is also adjustable to vary the extent of lateral movement imparted to the needle and looper.

Further objects of the invention, ysuchas to'provide a novel, simple and eflicient construction and organization. of mechanism for actuation of the needle and looper during the sewing operation, will become apparent as`the description proceeds in connection with the embodiment of the invention disclosed .in the accompanying drawings, where- Figurel is a top plan view of the machine, showing the invention applied thereto.

'Figurel 2 is a 'rear elevational view. 'Figure 3 is va `front elevational view Vof Yportion ofthe sewing mechanism.

A' VVFigure -4 is an end view ofy the sewing mechanism. K' l Figure: 5 is a crosssection kthrough the driving shafton substantially the line 5-5 of Figure 2. V Figure 6 is a sectional Vdetail View ofthe .-.camlfor moving lthe sewing mechanism laterally asit isfopera'ted. y Referring to 'the drawings'for a more detailed description, the-miachine shown in the drawinfrs is vof standard type, similar to that Vs'how'nin thepatent referred to, and its main frame comprises abcd plate 4 Vandan in the art and bein jrod, "as will later be described. end of the guideis mounted an vadjusting screw 30,' whichabuts the #side of the boss 25 and maintains thefbracket in vertical Voverhanging. arm 8l extending upwardly therefrom.y J ournalled at the outer end of the arm and supported thereb isa rotatable dial 9 'carrying a ring of radlally extending impalmg 1ns10.' The dial is'driven continuously rom a main shaft llmounted ina b ear1ng'12'in the armS'and in a bearin 13 extending 'upwardly from the `bed pate.

. The shaft carries a. bevel gear 14 meshing withfa bevel gear lupon ak shaft 16, thelatterhavlng fixedly positioned thereon a Worin 17'Ineshingwith a wornr gear 18, fromwhich the dial 1s drivent `Further description of :this4 mechanism for imparting continuous Arotation'to the dial is thoughtto be unnecessary, since tlie same is old and well known shown, for instance, in the patent to Wrig t, 1,057,106, March25, 1913. It will be noted, however, that the end vof the shaft lnadjacent thel maindriving Shaft supported in a bracket 20, Whichextends upwardly and is carriedby a `braclret supporting plate 2 1 xedly secured upon av stationary rod 22 extending through the arm 8 and rigidly mounted thereon. y The rod 22 e;

serves asv a support for the `sewing mechanism, and for this'pu'rpose Carries abra'cket 23 having a sleeve portion 23 surroundingv the rod. The bracket has a depending arm 24 provided with a boss 25, whichis straddled by the forked end 26 of a'guide 27, the latter atits upper end being fixedly secured to the rod For this purpose, the endof the'guide 1s split, as at 28 (Figure 4), `to

lsurround the rod and carries aj clamping,Y

screw`29, by means of which the guide is secured tothe rod. 'This guide serves tomaintain the bracket againstrocking movement vupon the rod 22,y but permits ya sliding movenient vof .thev same longitudinaliv upon the n the lower @Sition.v The bracket, 23 has an additiona dependlng arm '31(Figures 2 and3) having at "its lowerjenda boss 32, which serves as a vertical bearing forY arock shaft'33, the latter carrying Vat its lower' end a looper 'arm 34, upon which is mounted a :curved looper l 35. The rock kshaft 33 is rocked tooscillate the looper kby mechanism which will later rbe described.v A shaft36 extends kthrough theV boss" and into a side opening (not shown) 'in the boss132so that the same is roo ros

bodily carried by the brackeees'and may move laterally with the bracket. Upon the shaft 36 is mounted a sleeve 37 having -formed integrally-therewith a yradially expins, the looper is oscillated ina horizontal plane substantially paralleling the plane of the impaling pins. That is to saythe eye of the needle during .the operationl thereof describes 4a vertical arc and the eye of the looper during the oscillation thereof moves from side to side of the line of sewing describing an arc in a Asingle plane at an angle with respect to the plane of the arc described n by the needle eye. vThe vertical shaft 33 serves as an axis for the looper, while the horizontal shaft 36 serves as an axis for the oscillatory movementof the needle,y both of the shafts being carried by the bracket 23. The invention includes means for moving the bracket 23 longitudinally on the rod 2v2,A so

() o that the needle is carried laterally while between the loops to correspondwith the movement of the subjacent impaling pins. This actuating mechanism willA now be described.

Upon the main shaft 11 is xedly secured va disc 40 carrying upon one face a cam ring 41, shown lmore clearly in .Figures l and 6. Screws 42 extending through the face of the ring secure the same upon the disc, 4and adjusting screws 43 vpassing through the disc will" serve to' adjustjthe ring toward and from the face of the former, whereby the extent of lateral movement ofthe bracket may be varied. A follower 44'engages, the face of the'cam and is mounted upon a reciprocablepush rod 45 having a slide bearing inl a sleeve 46V securedmin abracket 47 extending rearwardly and upwardly from the rod 22. The opposite'vend of the push rod carries aforwardly extending arm 48 `(Fig'-4), in which vis mounted a finger 49 `paralleling the pushy rod '45 and bearing against' an arm 50, extending `upwardly from the bracket 23. VThe .followerv44 Vis normally maintained in contact withl the -cam by vmeans of a tension spring 51 anchored at 52 toV a pin upon the bracket 47, and at its opposite end secured to a pin 53 'upon the:y follower; the vspring serves to return the rod to the right, asl viewed in Figure 2, when, undery the` actuation of the cam,

vit has been moved to the left. It rwill be understoodthat as the `cam rotates, the folvlower and push .rod are moved tothe leftV (Figure 2) andthe linger 49 bearing upon thearm i`of the bracket moves the latter with the push rod, thus imparting a lateral movement to the looper and thread needle whichare supported'b'y "the bracket. TheV bracket 23 is returned to the position shown in Figures 2'and' 3 by means of a 'spr1ngJ5'4 l (Figure V3) anchored'at 55 to the guide 27 andhaving its other end secured to a lug 56 upon the bracket. When the bracket 1s moved -by the .cams to Vimpart llateral movement to the needle, the spring 54 is placed i under. tension and y continuedV rotation fofy ythe .cam permits :the springfto returnfthebracket to its normal positi'on',"the return movement being limited by a collar57 Vfixedly mounted upon the rod 22 and serving as an abutment for thesleeve portion 4.of the bracket.` `It is often desirable to v,vary the ,extent ofthe lateral movement of the'needle, asifor instance when the number 'of dial pinsto the inch is varied,` j which. is f sometimeszdoneto take care of la change to coarserlforf' finer fabrics.v The Vcam ring'41 upon'therplate 40inaybe adjusted for-thispurpo'se byreleasing the screws- 42 and rotating; the Hadjusting screwsl 43 to carry ythe ring ,towardvr or away. fromtbe faceyof vthefplate'; thus rendering unnecessary the .provi sion -of a newcamjj x l. i.

The mechanismv-for operating the needle connected to the vertical looper Yshaftf33 by means of va pitman .6()fconnected-atlione end to a strap 6l surrounding an eccentric 62 upon the main shaft. As in the' patent' to Keyser referred lto, ythe fouterl surface, of

ythe eccentric is made convex, and the inner surface of the strap concave to permit the pitman to be rockedlaterally as the bracket 23 is moved laterally, Atitsmopposit'end the pitman is connected to anvarm 63 fixvedly secured to thelooper shaft 33.; Nodetioned-.. VIt willbe note. :lhowever, thatthe arml 63aupon the looper shaft supports'an yupwardly extending post'64 (Figur'ezfl), the upper end of which isprovided withaball 65 fitting into. .ajsocket in thepitman Y The thread" eeiiiejiofis oseiuaedgina vand looper will nowlbe described.V Foroscillating the looper 35, the'niain shaft l'lfisy 95 ics vertical plane from a crank pin 67, (Figure 1') at the end of the main shaft,`[to which is secureda pitman 63 connected at itsbther end to a pin 69 iixedly secured'in the crank armf39 on theneedle sleeve v371.' I 'I'heiGrank pin 69 extends 'throiighnan' eye 70"atthe outer end of the pitmanand lis 'lofi sufficient length to permitthefnee'dle sleeve and the pin to, move laterally relativetov the pitman (68. The latter fis held, rigidly fagainist"-flat eral movement with the `needle supporting bracket 'by means of a peripherallyl grooved wheel 72 upon'thecrank pin 67,"into"' the groove of which projects a stud 73 secured to the pitman by means of a bracket 74. The stud and bracket are rigidl vconnected to the pitman, and since the former projects into the grooved wheel, the pitman is held rigidly against lateral movement with the needle supporting bracket. When the bracket has moved laterally, the crank pin 69 upon the needle support reciprocates in the eye 70 at the outer end of the pitman.

During the operation of the machine, the fabric to be united is supported upon the impaling pins and is advanced during the continuous rotation of the dial to the sewing mechanism. As the driving shaft is operated, either by means of a hand crank C at the outer end of the same, or by means of power applied to the driving pulley P, the needle is oscillated in a vertical plane, While the looper is oscillated in a plane at an angle with respect to the plane of the needle. The eye of the looper moves from side to side of the line of sewing and describesy an arc in a. plane paralleling the plane of the ring of the impaling pins. WVhile the needle is in its eXtreme downward position, it is moved laterally by the mechanism already described, so that it corresponds with the movement of the dial, and when it has moved yfrom adjacent the impaling pins, it is returned by means of the spring 54 to the position shown in Figures 2 and 3.

Since the invention relates entirely to the attachment including the parts which afford a lateral movement to the needle support, no detailed description of the usual sewing operation is thought necessary.

The needle and looper of the machine to which the invention is shown as applied, perform the sewing operation in the same manner as the machine disclosed in the patent to Keyser referred to, while the invention adapts the machine to the` continuous rotation of the dial by moving the needle and looper laterally while the former is adjacent the impaling pins.

It being understood that the invention is not limited in its application to the particular machine illustrated and described in detail, but may be applied to other types of machines, what I claim is:

l. In a machine for uniting fabrics, the combination with a continuously rotating dial having a ring of impaling pins, a driving shaft, a curved thread needle, a supporting arm for said needle, means for osbracket.

2. In a machine for uniting fabrics, the combination of a dialv having a ring of impaling pins, means for continuously rotating the dial, a bracket, a. support for said bracket upon which it is longitudinally movable, a driving shaft, a cam driven from said shaft, a follower for said cam, a push rod carrying said follower, and means on said rod engaging the bracket whereby the latter is moved on its support by said cam, a thread needle carried by said bracket, meansfor oscillating the needle on said bracket, a looper, a looper support on said bracket, means for oscillating said looper support in a plane at an angle to the planev of movement of said needle, said bracket moving laterally during-the oscillation of the needle whereby the latter is carried lat-- erally while in the loops to correspond with the movement of the subjacent impaling pins, and means for varying the extent of lateral movement of the bracket.

In testimony whereof I have hereunto set my hand.

WILLIAM J. STEERE.

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