US1331164A - Sewing-machine - Google Patents

Description

W. D. MICH ENER'.

SEWING MACHINE.

APPLICATION FILED NOV. 13. 1916.

Patented Feb. 17, 1920.

l/VVENTOI? 7wA J/MW By I UNITED STATES PATENT OFFICE.

WAYLAND D. MICHENER, 0F BOSELLE PARK, NEW J ASSIGNOR TO THE SINGER MANUFACTURING COMPANY, A CORPORATION OF NEW JERSEY.

SEWING-MAOHIN E.

Specification of Letters Patent.

Patented Feb. 17, 1920.

Application filed November 13, 1916. Serial No. 130,997.

To all whom it may concern.

Be it known that I, IVAY AND D. MICH- nrnn, a citizen of the United States, residing at Roselle Park, in the county of Union and State of New Jersey, have invented certain new and useful Improvements in Sewing- Machines, of which the following is a specification, reference being had therein to the accompanying drawings.

The present improvement relates to sewing machines having a reciprocatin needle, a work-holder, and means for pro ucing relative lateral ogging movements between said needle and work-holder in the formation of detached groups of fastening stitches, and has for an object to provide a machine of this type with work holding mechanism adapted to compress and hold a bundle of yarnstrands or the like during the stitching operation thus adapting the machine to the manufacture of tufted balls or tassels by the well known method of first sewing a bundle of yarn-strands together at intervals and subsequently cutting the body of yarn between the groups of stitches. This method is disclosed, for example, in the U. S. patent to Doolittle, No. 254,935, dated March 14, 1882.

It is undesirable, however, to rotate the compressed bundle of yarn-strands during the stitching operation as is done in the above mentioned Doolittle patent, particularly when the yarn-strands are to be simultaneously sewed together and to asuspenslon cord supported by a strip of braid or fringe,

and the invention has for a further object to provide a special form of work-clamp adapted to hold the yarnstrands in a compressed condition, and to provide mechanism for producing relative bodily movements between the needle and work-clamp, whereby the yarn-strands may be sewed together without rotatingthe latter.

A further object ofthe invention is to provide means {or stopping the machine with the parts in such a position that the needle Will not interfere with the ready removal of the finished work.

Further objects of the invention will appear in the following description and claims. The invention is shown embodied in a machine of the well known fiat-bed button sewer type such as disclosed in the patent to Sullivan, No. 777,564. In the present instance the workholder .:0 sists of a work supporting plate on which are mounted two rip-standing work confining guides which are spaced apart and define a work receiving throat between them. The work plate is provided with an elongated needle aperture extending across and somewhat beyond the space between the work confining guides and the latter are grooved vertically to receive the needle as it descends alternately at opposite ends of the needle aperture. A presserfoot, having a pair of arched toe-portions and a weighted heel is pivoted to the upper work-clamp arm and adapted to condense the yarnstrands placed in the work receiving throat.

In order that the stitched work may be readily removed from the clamp without striking the needle, the work-holder actuating cam is, in the present instance, so constructed as to place the work engaging membore in a forward position during the production of the usual tying stitches, so that when the machine is stopped the space above and in front of the work receiving throat is not unduly impeded by the needle.

To gain a better understanding of the invention reference may be made to the accompanying drawings in which Figure 1 is a. perspective view of a machine embodying the invention. Fig. 2 is a plan view of the work engaging portions of the work-clamp, and Fig. 3 is a side elevation of the parts shown in Fig. 2.

In the present instance the invention is shown embodied in a machine constructed substantially in accordance with the disclosure of said Sullivan patent and having the usual fiat bed 1, standard 2, and arm 3 in which is journaled the main-shaft 4 connected through the pitman 5 to the needlebar 6 carrying the eye pointed needle 7. Journaled in rear of the needle-bar 6 is a spring pressed pressersbar 8 adapted to be lifted bymeans of the lever 9 and the usual treadle connection. Geared to the mainshaft 1 is the cross-shaft 10 on which is mounted the pattern-cam 12 formed with a cam-slot 13 and carrying the usual tripping point lei which in practice actuates a latchlever 15 to release the starting and stopping lever 16 of the well known stop-mechanism common to machines of this type. The machine is preferably provided with the well known device disclosed by said Sullivan patrent o cutting th st tching th ead ben a h the work at the completion of each group of stitches. This device has not been illustrated, however, since it forms no part of the present invention.

The work-holder comprises the usual slidebar 20 which carries a block 21 adjacent its rearward end in which is journaled for slight vertical movement an upper workclamp arm 22 extending above and substan tially parallel with the slide-bar 20 and pressed normally downward by means of the usual arched pressure spring 28 secured upon the block by a screw-bolt. Secured to the forward end of the slide-bar 20 is a work-supporting plate 24f having a needleaperture 25 which is elongated in the direction of the length of the slide-bar 20. Hising from the work-supporting plate 24:, at opposite ends of the needle-aperture, are two up-standing work-confining guides 26, 27 which are spaced apart and define a work receiving throat at between them. The upper end-portions of the work-confining guides are oppositely curved, away from each other, and form an upwardly flaring mouth; the upper end-portion of the forwardly disposed guide being extended forwardly to form a flattened horizontal lip 28 which acts as an auxiliary guide to facilitate insertion of the strands into the mouth of the workholder. The distance between the opposed work-engaging surfaces 29, 80 of the guides is less than the length of the elongated aperture 25 in the work-supporting plate and the portion of each guide which stands directly over an extremity of the needle aperture is cut away at 31 to receive the needle, so that it may descend alternately at opposite sides of the confined yarn-- strands without passing through the latter.

Secured to the forward extremity of the upper elamp-arm is the horizontally extended shank 82 of the bifurcated presserfoot 29 which cooperates with the work-confining guides to compress and hold the yarnstrands in stitching position. The presserfoot 39 is secured between its ends to the downwardly and forwardly extended free end of the shank 82 by a pivot pin 82 and is formed with a weighted heel 83 and two spaced and arched toe-portions 8 1-, 84 which are extended forwardly at opposite sides of the elongated needle-aperture 25 and Workconfining guides 26, 27 so that they may bear upon the varn strands and condense them into a compact bundle preparatory to the stitching operation. The upper clamparm 22 may be lifted through the usual connections with the presser-bar, 8 and when so lifted the weighted heel 88 of the presserfoot will drop and elevate the toes 8% to the position shown in dotted lines in Fig. 8, in which position the toes 84 are so related to the guides 26, 27 and 28 that said toes act as auxiliary guides, in deflecting the made.

work downwardly into the throat 00, and prevent accidental movement of strands over the top of the rearwardly disposed guide 27 during the work-inserting operation. By arranging the work-confining guides 26 and 27 so that they embrace the needle-aperture, and by providing the spaced presser elements 8% for compressing the yarn in the throat m at spaced points on opposite sides of the stitching point, the yarn strands will be securely held in the form of a compressed bundle and may be readily bound tightly together by the fastening means.

Longitudinal movements are imparted to the work-holder through the usual connections with the pattern-cam 12 which comprise a vertical post 85 mounted at the rearward extremity of the slide-bar 20 and carrying an adjustable block 86 fitted within the slotted arm 87 of the two-armed rocklever whose other arm 88 carries a camroller 39 fitted within the cam-slot 18. In

the present machine this cam-slot is of special form and is designed to so jog the worle holder as to cause the needle to form the first stitch near the rearward extremity of the needle-aperture in the work-supporting plate, yet within the bundle of yarn-strands. The second stitch is made in the yarn at a point forward of the first stitch; the third stitch at the forward extremity of the needleaperture; the fourth stitch within the yarn and the fifth stitch at the rearward extremity of the needle-aperture. Subsequent stitches are formed alternately at opposite sides of the yarn but not within the latter and bind the strands tightly together; the last three stitches of the group being made at the same point where the first stitch was These last stitches serve to knot the stitching threads in the manner described in the said Sullivan patent. The usual mechanism for jogging the work-holder laterally of itself in machines of this type is not utilized in the present instance and is dispensed with. A guide-block 40, secured to the bed-plates of the machine, is provided with a slideway ll which receives the slidebar 20 and confines the said bar against lateral movement.

In the operation of the machine the resser-foot p is lifted to the dotted line position, Fig. 8, and a bunch of yarn-strands s are advanced over the lip 28 and into the throat m. At this time the elevated toeportions 84 act as auxiliary guides and form together with the lip 28 an enlarged and forwardly opening mouth leading to said throat. If it is desired that the tufts be attached to suspension cords, a loop of such cord 0 is also placed in said throat. The presser-foot is next lowered whereupon the arched toe-portions 84 descend and act to round over and compress the yarn-strands into a compact bundle adjacent the stitching point, as shown in Fig. 1. Themachine is then started whereupon the work-holder 1s jogged, laterally of the needle. path and a group of stitchesare formed about e y rn strands to bind them tightly together. Aft r the stitching operation the work may be removed and the yarn severed to permit expansion of the cut ends. into the form of a tufted ball or tassel such as shown at t.

The form and arrangement, of the parts constituting the invention are clearly, susceptible of material modification within the scope of the appended claims and it is to be understood that the invention is not limited to the use of any particular type of stitch forming mechanism and that it is immaterial, in the broad aspect of the invention, whether the relative jogging or stitch positioning movements are secured by jogging the needle or the work-holder or both the needle and work-holder.

Having thus set forth the nature of the invention, what I claim herein is 1. In a sewing machine, in combination, stitch-forming mechanism including a reciprocating needle, a work-support formed with a yarirreceiving throat, a pressermember adapted to compress a bunch of yarn-strands in. said throat and hold said yarn. strands fixed relative to said throat during a succession of stitch-forming cycles, and means for producing relative to-andfro stitch-positioning movements between said needle and work-support to cause a localized group of binding stitches to be formed about said bunch of yarn strands.

In a sewing machine, in combination, stitch-forming mechanism including a reciprocating needle, a stop-motion for con trolling its period of action, means, including work-supporting and vertically movable presser members shaped to compress and wholly inclose a bunch of yarn strands ad jacent the stitching point, said members operating to hold the yarn strands fixed relatively thereto during the stitching period, and means for producing relative jogging movements between said needle and yarnhol'ding means in directions transversely of the path of reciprocation of said needle.

3. In a sewing machine, in combination, stitch-forming mechanism including a reciprocating needle, a yarn-holder including relatively movable work-supporting and presser-members, said work-supporting member having opposed upstanding yarn-confining surfaces between and relative to which the yarn is held fixed by the presser-member during the stitching operation, and means for producing a plurality of relative jogging movements between said needle and yarn-holder in directions transversely of the space between said surfaces while the yarn is held in fixed relation to. the yarn-holder.

-l. In a sewing machine, in combination,

stitch-forming mechanism including a reciprocating needle, a yarn-holder includ ing relatively movable work-supporting and presser-members, said work-supporting member having spaced upstanding yarn-confining surfaces, and means for producing relative lateral jogging movements between said needle and yarn-holder in directions transversely of the space between said surfaces, said movements being of greater amplitude than the distance between said surfaces adj acent the stitching point, whereby a bunch of yarn strands is wholly inclosed by the group of stitches formed.

5. In a sewing machine, in combination, stitch-forming mechanism including a reciprocating needle operating to form a predetermined number of stitches, a workholder comprising a pair of spaced yarnconfining guides disposed, respectively, in front and in rear of the needle-path and a prcsser-device including spaced work-engaging portions disposed at the sides of the needle-path and adapted to compress a bunch of yarn-strands placed between said guides and grip the yarn-strands throughout the formation of said stitches, and means for producing relative stitch-positioning movements between said stitch-forming mechanism and work-holder across the space between said guides, whereby said stitches are grouped together at one point along the length of said yarn-strands.

6. In a sewing machine, in combination, stitch-forming mechanism including a vertically reciprocating needle, a support having guide surfaces defining an upwardly opening yarn. receiving throat between them, a prcsser-member mounted on saidsupport for compressing and holding a bunch of yarn-strands in said throat, and means for jogging said support laterally of said needle.

7. 'A special Work-holder for sewing ma chines comprising, a support having opposed guide surfaces defining a yarn-rcceiw ing throat between them, and a pressermember movable vertically to a depressed position beyond'the mouth of said throat for compressing and holding a bunch of yarn-strands in said throat, and means for jogging said work-holder widthwise of said throat.

8. A special work-holdcr for sewing machines comprising relatively movable opposed clamping members, one of said mom bers having opposed yarn-confining surfaces defining an upwardly opening yarnreceiving throat, and the other of said members being movable to a depressed position below the mouth of said throat to con'ipress the yarn confined therein, and means for jogging said work-holder to-and-fro in the direction of the shortest distance between said surfaces.

9. A special work-holder for sewing ma defining an upwardly opening work-receiving throat, and spaced presser elements embracing sald throat and movable below the mouth thereof for compressing and holding the work therein.

10. A special work-holder for sewing machines comprising, a support formed with a yarn-receiving throat, a presser-member carried by said support and adapted to press a bunch of yarn-strands into and entirely beyond the mouth of said throat, and means for jogging said work-holder.

11. A special work-holder for sewing machines comprising, a support having an elongated needle-aperture and opposed work-confining surfaces at opposite sides of said aperture, said surfaces being disposed inwardly from the ends of said aperture and defining an upwardly opening throat. and a presser-member for compressing and holding a bunch of yarn-strands between said surfaces.

12. A special work-holder for sewing machines comprising, a support having an elongated needle-aperture and opposed upstanding work-confining surfaces located at opposite sides of said aperture and defining an upwardly opening throat, the distance between said surfaces being less than the length of said aperture, and a Presser-member for compressing and holding a bunch of yarn-strands between said surfaces.

13. A special work-holder for sewing ma.- chines comprising a support having guide surfaces defining an upwardly opening work-receiving throat, a pivotally mounted presser-foot having toe portions adapted to compress and hold the work in said throat, a presser-foot lifter, and means whereby said toe portions are swung upwardly about their pivot when said presser-foot is lifted.

14:. A special work-holder for sewing machines comprising a support having guide surfaces defining an upwardly opening work-receiving throat, a pivotally mounted presser-foot for compressing and holding the work in said throat, said presser-foot including toe portions and a weighted heel, and means for lifting said presser-foot.

15. A special yarn-holder and compressor for sewing machines comprising a worksupporting plate, a pair of spaced upstanding guides mounted on said plate and having opposed yarn-confining surfaces defining an upwardly opening throat, and a presser-member opposed to said plate and adapted to compress the yarn positioned between said guides, said guides having grooves to receive the needle and said plate having an elongated needle-aperture the extremities of which register with said grooves.

16. A special work-clamp for sewing machines comprising, in combination, a lower supporting plate havmg a needle-aperture,

a pair of spaced rip-standing work-confining guides carried by said plate and embracing said needle-aperture, and an upper clamp-member including a presser-foot having a pair of toe-portions extending along opposite sides of said guides and adapted for movement below the upper extremities of said guides to confine the work in the space therebetween.

17. A special work-holder for sewing machines comprising, a support and a pair of spaced, lip-standing, work-confining guides carried by said support, the upper end of one of said guides being extended outwardly to form an auxiliary guide facilitating insertion of the workinto the space between said guides.

18. A special work-holder for sewing machines comprising, a support, a pair of spaced up-standing guides carried by said support and defining a work receiving throat, the upper end of one of said guides being extended outwardly away from the other guide, a presser-foot including spaced work-engaging toes extended forwardly at opposite sides of said guides, and means for lifting said presser-foot, said toe-portions serving, when lifted, as auxiliary guides facilitating insertion of the work into said throat.

19. In a sewing machine, in combination, a reciprocating needle, a work-holder comprising forwardly and rearwardly disposed guides defining an upwardly opening throat between them, means for producing relative forward and rearward jogging movements between said needle and guides, and means for stopping the machine with the needle nearer the rearward guide whereby the work may be readily removed without striking the needle.

20. In a sewing machine, in combination, a reciprocating needle, a work-holder comprising forwardly and rearwardly disposed guides defining an upwardly opening workreceiving throat between them, means for producing relative forward and rearward jogging movements between said needle and guides, said means being actuated to cause the needle to make the first stitch within the body of the Work, subsequent stitches alternately beyond opposite sides of the work, and the last stitch within the body of the worch but nearer the rearwardly disposed gu1 e.

21. A special work-clamp for sewing machines, comprising a work-support formed with opposed guides defining an open sided throat and a bifurcated presser-foot having work-engaging portions movable depthwise of and along the open sides of said throat, said work-support having a needle-clearance aperture at the bottom of said throat.

22. A special work-clamp for sewing inachines, comprising a supporting member having a needle-aperture, upstanding guides carried thereby and disposed in spaced relation embracing said aperture to define an open sided throat and a presser-foot mounted on said supporting member and having spaced Work-engaging portions movable depthwise of and along the open sides of said throat.

23. In a sewing machine, in combination, stitclrformilig mechanism including a reciprocating needle, a work-support formed with opposed upstanding guides defining a throat having oppositely disposed open sides, spaced presser elements movable depthwise of and along the open sides of said throat at opposite sides of the needlepath and means for producing relative stitch-positioning movements between said needle and work-support to lay the stitches about a bundle of yarn-strands confined in said throat.

24. In a sewing machine, in combination, stitch-forming mechanism including a ver tically reciprocating needle, a work-support having an elongated needle aperture, guides carried by .the work-support and presenting opposed upstanding yarn-confining surfaces at opposite sides of said needle'aperture, a presser for compressing and holding a bunch of yarn-strands placed between said guides, and means for relatively jogging said needle and work-support in directions lengthwise of said aperture.

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

WVAYLAND D. MICHENER.

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