US1401561A - Sewing-machine - Google Patents

Description

M. SCHILLER. SEWING MACHINE. APPLICATION FILED JUNE 9. I919- Patented Dec 27, 1921.

3 SHEETS-SHE ET I- R p ME x 1 P m M. SCHILLER. SEWING MACHINE.

. vAPPLICATION FILEDv JUNE 9, I919- Dec. 27

3 SHEEIS-SHEEI 2- 4 443 yrrazmvey,

M. SCHILLER.

- SEWINGMALHINE.

APPLICATION FILED JUNE 9, l.9l-9- Patented Dec. 27, 1921.

3 SHEETS-SHEET 3- UNITED STATES PATENT OFFICE.

MORRIS SCHILLER, OF ST. LOUIS, MISSOURI.

, snwIive-macnmn Application filed June 9, 1919. Serial No. 802,899. J

T 0 all who-me't may concern:

Be it known that I, Momus SCHILLER, a subject of Russia. residing at the city of St. Louis, State of Missouri, have invented certain newand useful Improvements in Sewing-Machines, of which the following is a specification, reference being had to the accompanying drawings, forming a part thereof.

This invention relates generally to sewing machines and, more particularly, to certain new and useful improvements in sewing machines of the two spool type, wherein the thread from the bobbin-spool forms a "lock- Stitch with the thread from the needlespool. the principal object of my present invention being to provide a sewing-machine especially of the type stated with means whereby the thread from the needle-spool is held or maintained in substantially a taut condition and slack therein efficiently taken up as the thread is pulled off by the needle.

With the above and other objects in view, my present invention resides in the novel features of form, construction, arrangement. and combination of parts hereinafter described and afterward pointed out in the claims.

In the accompanying drawings,

ligure 1 is an elevational view of a sewing-machine embodying my invention;

Fig. 2 is an end elevational view of the head of the machine:

Fig. 3 is a vertical sectional view of a part of the needle-thread tension or pull-off mechanism. showing its relation with the needle movement;

F ig. 1 is a detail section of the rotary spider forming part of said mechanism:

Fig. 5 is a plan view of a thread tension and release device carried by the spider:

Fig. 6 is a transverse section of the thread tension and release device shown in Fig. 5'

Fig. 7 is a fragmental view of the spider.

showing a hinged thread-guide thereby Fig. 8 is an end elevational view of the bobbin-spool holder and the'looping parts for forminga lock stitch with the needlethread. a part of the machine-head being shown in transverse section:

Fig. 9 is a vertical transverse sectional view taken approximately on the line 9-9. Fig. 8. a fragment of the bobbin-shaft being shown and the machine-head being. omitted;

carried Fig. 10 is a plan view of the two-loop forming elements of the bobbin-thread;

Figs. 11 and 12 are erspective views, respectivelv, of the outside and inside loopforming elements;

Fig. 13 is a front elevational view, partly 'in section, of the bobbin-spool holder; and

Figs. 14 and 15 are, respectively, plan and side elevational views of the bobbin-spool holder.

Referring now more in detail to the said drawings, 1n which like reference characters refer to like parts throughout the several views, 1 indicates the machine-head, in which are mounted for rotation a power- .shaft 2 and a needle-shaft 3, the shaft 2 being adapted for connection through a beltpulley 4 with any suitable source of power and the shaft 3 being driven through the shaft 2 through the sprocket-gears and chain 5. At the operating end of the needleshaft is a crank 6 having connected thereto a pltman 7. Connected to the pitman T for vertical reciprocatory movement upon rotation of the shaft 3. is aneedle-bar 8 havmg a needle 9 secured thereto, as by a set screw 10. and movable therewith.

Fixed to the operating end of the shaft 2 to rotate therewith, is a combined threadguide and connecting-link 1 1, the needle 9,

y means of its shaft driving sprocket-gears The center-rib 15, as best seen in Figs.

8 andp'll. is interrupted orbroken by a gap. and has its one endreduced and formed into a shouldered hook 17. Formed in the -1i1ember 11 and vertically alined with the needle 9. is aslot 18 open at. its rear end,

as seen in Fig. 12, and provided at its said end with a lug 19, which extends to the plane of, and engages with, the rib-hook 17. so that as the member 11 is rotated or revolved. the -me-mber 14 will be revolved with it, the slot 18 permitting rotation of the member 11 without interference or engagement with the needle.

The member 14 comprises side walls 20 20, disposed on opposite sides of the centerrib 15, and which together form a hollow shell of convexo-convex form,each wall 20 being slotted or cut away, as at 21, like the connecting link 11, to allow for the needle movement. The member 14 is preferably sufliciently large to receive thereinto and accommodate a spool of thread 22, such as shown in Fig. 8, which spool is preferably the common one of commerce upon which the thread is wound for the trade, and to provide for the proper holding of such a spool within the member 14, so that the spool may perform or operate in a manner similar to the specially designed bobbins, as are now common, I employ preferably a spool-holder 23 shown particularly in Figs. 13, 14, and 15. This holder 23 is of substantially U-shape and is provided at its bight with an upstanding spool-stem 24, the stem 24 being equipped, as shown, with a spring-pressed eccentric 25 located at its upper or free end for releasably locking the spool upon the stem and within the holder. One of the legs of the holder 23 is slotted, as at 23 to accommodate the thread of the spool, and fastened, as by the screw 26*, to the holder 23 to cooperate with said leg of the holder 23 in tensioning the thread as it is pulled off the spool, is preferably a springmember 26 slotted as at 26*, the thread from the spool first passing through the ,slots 23, then between, and so yieldlngly held and thereby tensioned by, the member 26 and said leg of the holder, and then through the slots 26 for engagement by the needlethread. On the opposite leg of the holder, is arranged a stud 27, which is arranged for support .in a bearing 28 formed in the rear wall of the-member 14, as seen especially in .Fig. 9; and formed on the other or firstmentioned leg of the holder 23, is a lug 29 preferably of oblong shape, shown especially 1n Figs. 2, 8, and 14, arranged for engagement by a spring-fork 30 mounted on the bearing 12, as shown, for holding the spoolholder 23 against bodily rotation within the housing or member 14.

The action 'of'the needle-thread in its engagement with the bobbin-thread and the pulling-off of the bobbin-thread by the mechanism here described to form the lock stitch in my machine correspond substantially identically with like operations in the common lock-stitch machines and will be well understood; Iwill hence dispense here with a detail description of such thread movements or operations. Since, however, the member 14 is of relatively large size to accommodate ordinary thread-spools, and that hence the bobbin-thread .must form a cor- 65 respondingly large loop to surround the thread-spool as it forms the lock-stitch with the needle-thread, it becomes necessary to provide special tension means for the needlethread, so that it may be pulled off and retracted in likewise correspondingly lar e steps to accommodate the large loops of the bobbin-thread. To that end then I employ the means now to be described.

Secured, as by a screw 31, to the needleshaft 2 to revolve or rotate therewith, is a wheel or rotary member 32 formed preferably of a pair of parallel spiders 33-33. Disposed between and suitably fixed to the spiders 33, is a somewhat arcuated block or thread-pulling member 34, the block 34 being positioned on the wheel 32 at a suitable point adjacent its periphery. Also disposed between the spiders adjacent their periphcry, but suitably spaced circuniferentially rearwardly (reference being had to the direction of rotation of the wheel as indicated by the arrows) on the wheel from the block 34, is a second or auxiliary thread-pulling member or block in the form preferably of a small tube 35 fixed to the spiders as by the screws 36, the members 34 and 35 and their fastening members serving also to securely hold the spiders 33 operatively together in flatwise spaced relation. Extending radially from the head 1, are arms 37 supportin at their outer ends an annular guard-band 38 surrounding or embracing the wheel 32. as seen especially in Fig. 2. The guard or band 38 is interrupted or broken away, as at 39, adjacent the needle 9, and fixed to the ends 100 of the band and spanning the ap therebetween, is a bridge-piece 40 pre erably cut away within its length, as at 41. Extending under, and across the cut-away portion of. the bridge-piece 40, is a leaf or strip 42 pro- 105 vided with a thread-guide 43 disposed adjacent the needle 9 for feedin or guiding the thread to the eye thereof, tie leaf or strip 42 being preferably pivoted at one end to the bridge-piece 40 to swing outwardly there- 110 of for convenience in threading. The portion of the head 1 directly opposite the thread-guide 43, as seen especially in Fig. :2.- is also provided with a thread-guide 44.

Fixed to one. and spaced somewhat from the other, spider 33, and disposed between the spiders 33 also adjacent their periphery but spaced rearwardly upon the wheel a relatively short distance from the second threadpulling member 35, is a second somewhat arcuated block 45; and fixed at its ends to said other spider and disposed in the space therebetween and the block 45. as seen especially in Fig. for cooperation with the block 45. is a leaf-spring 46, the block 45 and spring 46 forming or providing on the wheel 32 a thread-grasping or engaging member for pulling from the needle and taking up slack in the needle-thread after it has been passed into the goods. 13

Provided as is usual upon the head 1, is a. short staff 47 for the needle thread-spool 48; and mounted upon the head 1 intermediate the spool 48 and the wheel 32, is a post 19. supporting transversely at its upper end a longitudinally slotted tube 50. Disposed for sliding movement in the slot of the tube 50. is a hook or slacktake -up v51 normally held yieldingly in retracted position or 1n the position thereof illustrated in Fig. 1.

In use or operation, the thread from the spool 48 is strung as shown in Fig. 1, passing from the spool through the usual guide 52. then around a shaft 53, then to the hook 51 and from the hook 51 to and through the guide 44, and then, further assuming the wheel32 to be in such position that its car-' ried'members 34, 35, and 45 are disposed to the left of the shaft or screw 31,'reference being had to Fig. 2, between the spiders and to the right of the shaftor screw 31, to and through the opposite guide 43, and then to and through the eye of the needle 9. As

sumealso that a holder 23 carrying a spool of thread is disposed in the member 14. and its thread strung through the slots 23 and 26 and between the member 26 and the leg of theholder 23 and thereby yieldingly held under tension, to be engaged and caught by the needle-thread as the needle-thread is brought down through the goods by the needle.

The wheel 32 now rotating and the machine operating. its carried block or threadpulling member 31 is carried around and engages the needle-thread strung in its.path as described and pulls the thread from the spool -18. The member 35, in turn, engages the thread to increase the pullsofi, and both members 34 and 35 act to pull from the spool 48 sufficient thread, as the needle thread is carried by the needle down through the goods. for cooperation with the bobbin-thread in forming the loop of the lockstitch. It may be here stated that, since the member or block 35 serves merely to increase the pull off. the same may in some instances,

as when but a limited pull off is required in any particular machine, be omitted. As the members 34 and 35 so act to pull the thread from the spool, the hook 51. which serves to yieldingly keep the needle-thr ad taut as it' is being so pulled, is pulled out of its normal retracted position and toward the wheel 32. The second member 35 having been carried past the needle and the loop of the stitch so formed, the needle-thread is now grasped by and between the block -l5 and spring 46. and the same then function to pull the formed loop up into the goods. the needle-thread passing through and from the grasping member as the wheel continues its rotation: the grasping-member thus serves to efliciently locate. as it might be said, and tighten the so formed lock-stitch in the goods. The

machine, the goods, of course. being fed by a suitable feed-device 51.

My new machine is comparatively simple in construction. may be inexpensively and conveniently' manufactured. is efiicient in operation, and I am enabled to use ordinary or common spools of thread for the needle and bobbin. thus dispensing with any specially wound spools or bobbins.

I am aware that minor changes in the form. construction, arrangement. and combination of the several parts of my machine may be made and substituted for those herein shown and described without departing from the nature and principle of my invention.

Having thus described my invention. what I claim and desire to secure by Letters Patent is: 1

1. A sewing machine of the type described comprising. in combination. a needle, InQZlllS for pulling-off and takingup the needlethread. said means including a rotary mem-' her. a member carried by the rotary member for pulling the thread to the needle. and a second member also carried by the rotary member and spaced circumferentially on the rotary member from the first member adapted to grasp and take up the thread from the needle and then release the thread. mechanism for reciprocating the needle and actuating the rotary member. and yielding means 'for taking up slack in the thread on its release by said second member.

2. A sewing machine of the-type described comprising. in combination. a needle. a 1'0 tary member, mechanism for reciprtwating the needle and actuating the rotary member. a block carried by the rotary member for pulling the thread to the needle. a member including a spring also carried by, the rotary member and spaced circumferentially on the rotary member from the block. said member being adapted to grasp and take up the thread from the needle and then release the thread. and means adapted to take up slack in the thread on its release by said member. 7

3. A sewing machine of the type described comprising. in combination. a needle. a yield ing-member adapted for engagement with theneedle-thread. a rotary member. mechanism for reciprocating the needle and actuating the rotary member. a block carriedby the rotary member for pulling the thread to the needle against the pull of the yieldingmember, and a member including a leafspring also carried by the rotary member and spaced circumferentially on the rotary spiders. the thread to the needle being passed between the spiders, mechanism for reciprocating the needle and actuating the rotary member, a block carried by the rotary member and disposed between the spiders, the block being adapted to pull the thread to the needle. a member including a leaf-spring also carried by the rotary member and spaced circumferentially between the spiders fromthe block, said member being adapted to grasp and take up the thread from the needle and then release the thread, and yielding means for taking up slack in the thread on its release by said last named member.

5. A sewing machine of the type described comprising, in COInblI13tl0n.{ tl needle, a rotary member including a pair of spaced spiders. the thread to the needle being passed between the spiders. a yielding hook adapted for engagement with the thread as it is passed to the needle, mechanism for reciprocating the needle and actuatingthe rotary member, a block carried by the rotary member and'disposed between the spiders, the block being adapted to pull the thread to the needle against the tension of the hook. and a member including .a leaf-spring also carried by the rotary member andspaced circumferentially between the spiders from the block, said member being adapted to grasp and take up the thread from the needle and then release the thread, said hook being adapted to take up slack in the thread on its release by said member. I

6. A sewing machine of the type described comprising, in combination, a needle, a-

rotary member including a pair of spaced spiders. the thread to the needle being passed between the spiders, mechanism for reciprocating the needle and actuating the rotary member. a take-up member carried by the rotary-member. and disposed between its spiders, said member being adapted to grasp, then hold and pull, and then release the thread on the rotation of the rotary member, and yielding means for taking up slack in the thread on its release by the take-up member.

7. A sewing machine of the type described comprising, in combination, a needle, yielding thread-engaging means, a rotary member including a pair of spaced spiders, the thread to the needle being passed from said means between the spiders, mechanism for reciprocating the needle and actuating the rotary member, and a take-up member including a block and a cooperating leaf spring carried by the rotary member and disposed between its spiders, the thread being grasped by and between the block and spring, then held and pulled, and then released by the block and spring on the rotation of the rotary member, said means functioning to take up slack in the thread on its release by the take-up member.

8. A- sewing machine of the type described comprising, in combination, a needle, a rotary member including a pair of spaced spiders, the thread to the needle being passed between the spiders,'mechanism for reciprocating the needle and actuating the rotary member, a block carried by the rotary member and disposed between the spiders for pulling the thread to the needle, a second block carried by the rotary member and spaced circumferentially between the spiders from the first block for also pulling the thread and increasing the slack in the thread to the needle, a third member carried by the rotary member and spaced circumferentially between the spiders from the second block. said third member being adapted to grasp and take up and then release the thread from the needle, and yielding means for taking up slack in, the thread on its release by the third member.

9. A sewing machine of the type described comprising, in combination, a needle. a rotary member including a'pair of spaced spiders. the thread to the needle being passed between the spiders, mechanism for reciprocating the needle and actuating the rotary member, a block carried by the rotary member and disposed between the spiders. said block being adapted to pull the thread to the needle, 21 second block carried by the rotary member and spaced circumferentially between the spiders from the. first block for also pulling the thread and increasing the slack in the thread to the needle. a third member including a spring carried by the rotary member and spaced circumferentially between the spiders from the second block. said third member being adapted to grasp and take up and then release the thread from the needle, and 'ielding means for taking up slack in the thread on its release by the third member.

In testimony whereof, I have signed my name to this specification.

MORRIS SCHILLER.

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