US2824531A - Sewing machines adapted for cord laying - Google Patents

Description

Feb. 25, 1958 F. w. BREUL EI'AL snwmc MACHINESADAPTED FOR coma LAYING 2 Sheets-Sheet 1 Filed June 1, 1954.

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Feb. 25, 1958 F. W. BREUL ETAL SEWING MACHINES ADAPTED FOR CORD LAYING Fild June 1,1954

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WITNESS 2 Sheets-Sheet 2 ,JNVENTORS Fredric W B reu y Stanley M. .Slrva ATTORNEY SEWING MACHINES ADAPTED FOR coRD LAYING Fredric W; Breul and tanley M. Sliva, Bridgeport, Conm,

assignors to The Singer Manufacturing Company, Elizabeth, N. 3., a corporation of New Jersey Application June 1, 1954, Serial No. 433,543

Claims. (Cl. 112-100) This invention relates to sewing machines and, more particularly, to a sewing machine of the type which is adapted to manipulate one or more ornamental cords into a position on a work fabric in which the cords will be secured to the fabric by the stitches being formed therein.

It is an object of this invention to provide an efiicient and practical cord-laying mechanism for a sewing machine.

It is a further object to provide a cord-laying mechanism which is adapted to be built into a sewing machine in an inconspicuous and compact manner.

Still another object of this invention is the provision of a novel and expeditious method for converting an existing type of sewing machine into a highly satisfactory cord-laying sewing machine.

It is also an object of this invention to provide simple and effective mechanism whereby our novel method for conversion of a sewing machine to cord laying may be readily and effectively practiced.

Another object of this invention is to provide a cordlaying device which will be shifted out of operative position automatically whenever the work fabric is to be removed or replaced in the sewing position beneath the needle.

With the above and other objects and advantages in view as will hereinafter appear, this invention comprises the devices, combinations, arrangements of parts, and methods hereinafter described and illustrated in the accompanying drawings of a preferred embodiment in which: I

Fig. 1 represents a front view of a portion of a sewing machine with the sewing machine head taken in vertical cross-section and having my invention applied thereto,

Fig. 2 is a detached front elevational view of the oscillatory thread-laying frame and showing a portion of the sewing machine head,

Fig. 3 is an end elevational view of the sewing machine ofFig. 1 with the machine head face-plate removed.

Fig. 4 is a rear elevational view of a portion of the oscillatory thread-laying frame with parts of the presser mechanism and of the means for supporting and confining the thread-laying frame in place being shown in a cross-section taken substantially along line 4-4 of Fig. 3,

Fig. 5 is a cross-sectional view taken substantially along line 5-5 of Fig. 1, and including only a portion of the sewing machine head, 1

Fig. 6 is a cross-sectional view of the thread-laying device and of the sewing machine presser-foot as taken substantially along line 6-6 of Fig. 1,

Fig. 7 is a cross-sectional view of a portion of the thread-laying mechanism taken substantially along line 7-7 of Fig. 2, and

Fig. 8 is an enlarged plan view of the seam which is produced by the machine of this invention.

Referring more partic larly to Figs. 1 and 3, the preferred embodiment of this invention is illustrated as apfa Ice 2,824,531

plied to a sewing machine having a conventional frame including a bed 10, a standard 11 rising from the bed, and a sewing head 12 extending from the standard and normally closed by a face plate 13. Journaled vertically in the sewing head 12 is a presser-bar 14 which is spring biased downwardly and which carries at its lower extremity a presser-foot 15. Beneath the presser-foot, the bed 10 is fitted with a throat plate 16 which is apertured to accommodate a work-engaging feed-dog 17 of a conventional four-motion work-feeding mechanism. The presser-bar 14 is provided with a rearwardly projecting lug 18 which overhangs a presser-lifting lever 19 that is pivoted in the sewing head.

Fixed in the sewing head 12 by means of set screws 20 and 21 are a pair of vertically spaced pins 22 and 23 upon which a needle-bar carrying bracket 24 is fixed. The bracket 24 is formed with vertically spaced bearings 25 and 26 in which a needle-bar 27 is journaled for endwise reciprocatory movement. At its lower extremity, the needle-bar is fitted with a needle 28 which is adapted for work penetrating movement through a suitable slot 29 formed in the presser-foot 15. Journaled in the sewing head in bushings such as that shown at 30 is a rotary needle-bar actuating shaft 31. A combined crank and counterbalance member 32 fast on the shaft 31 is fitted with a link 33 which is, in turn, pivoted on a pin 34 projecting from the needle-bar 27. A slide block 35 on the pin 34 is arranged to slide in Ways 36 formed in the sewing head so as to prevent the needle-bar from turning.

It will be appreciated that the needle-bar actuating shaft 31 is operatively connected in timed relationship with the mechanism in the standard and in the bed for actuating the work-feeding mechanism and the lower stitch forming instrumentalities (not shown) which may be of any conventional type. The work fabric is thus advanced and the stitches are formed from the right to the left as viewed in Fig. 3.

Movably mounted between the sewing head 12 and the needle-bar carrying bracket 24 isa frame or plate 40 which pivotally embraces the uppermost needle-bar bracket supporting pin 22. The frame 40 is slotted at 41, as is best illustrated in Figs. 2 and 4, slidingly to accommodate the lowermost bracket supporting pin 23 so that the frame 40is pivotally mounted on the pin 22 and is slidably confined between the sewing head and the needle-bar bracket for oscillatory motion which is limited by the coacting slot 41 and pin 23. The frame 40 is recessed, as at 42, slidingly to accommodate a shank 43 of a cord-laying finger 44 which shank 43 is maintained in the recess by means of a recess cover plate 45 secured as by screws 46-46 to the frame 40.

The shank 43 of the chord-laying finger is formed with an outturned lip 43' which is engaged by one end of a coil spring 47 that is connected at its other end to an eye element48 carried by the frame 40. The spring 47 serves to bias the cord-laying finger downwardly and into close proximity to the presser-foot and into a lowered position limited by contact of the outturned lip 43 with,

the recess cover plate 45. A pin 49 which projects from the presser bar 14 and extends beneath the outturned lip 43' of the cord-laying finger serves to engage and lift the lip and hence the cord-laying finger whenever the presserfoot is lifted. By this construction, the cord-laying finger may be advantageously disposed in close proximity to the presser-foot and yet not interfere with the presser-foot nor with the manipulation of work fabrics when the presserfoot is raised.

As best shown in Figs. 3 and 6, the cord-laying finger 44 is preferably formed to extend about the path of the needle 28 so as to occupy a position in front of the needle Patented Feb. 25, 1958 3 in the line of scam formation of the sewing machine. The finger 44 is formed, at a point in front of the needle, with a plurality of cord-guiding apertures 50-50.

The apertures 50- are formed in the finger44 at: a point between'the path of'reciprocation of the needle and the toesof the presser-foot between which is secured a wire cord guide'51 that facilitates aproper introduction of the cords to the cord-guiding apertures 50. The cordlaying finger 44 is formed with a small extension 52 disposed behind the apertures 50--50 in the line of seam formation and extending toward the path of the needle.

Referring to Fig. 1 the frame 40 for the cord-laying finger is pivotally connected by a shouldered screw 53 to apitman 54 which embra'ces'at its other extremity an eccentric 55 which is mounted in the sewing machine frame transversely of the needle-bar actuating shaft 31 and which is driven in timed relation with the needlebar actuating shaft by means of a bevel gearconnection 56, 57 therewith. The speed ratio of the gear connection 56, 57 is two-to-one, so that the frame 40 forthe cordlaying finger will be oscillated at a frequency one-half that of the needle-bar reciprocation. As the cord-laying finger 44 is shifted laterally of the line of seam formation, one or more cords, each of which passes through the wire'guide 51 and through a respective one ofthe cord-guiding apertures 50-50 in the thread-'laying-finger, is carried from one side of the needle to the other at each stitch. The cords, which are indicated at- G in Fig. 8, are thusentwined sinuously between the stitches of sewing thread T and are,- therefore, securel y fastened to the work fabric. 7

The thread-laying mechanism of this invention is, therefore, arranged in a compact manner within the sewing machine frame and is securely supported and' guided between the machine frame and the needle-bar bracketto provide an efficient self-contained cord-laying. mecha-- nism for the sewing machine.

Moreover, it will be apparent from the accompanying drawings and from the above description that the present invention constitutes an extremely expeditious and practical mode of providing a cord-laying sewing machine by simple modification to a conventional zigzagsewing machine such as is shown in U. S. Patent No. 1,020,089, dated March 12, 1912. This modification lends itself as readily to accomplishment by a mechanic in the field as it doesto-the original manufacturer of the-machine.- The alterations which are r'equiredin order to complete" the present construction from the' zigzag machine of the above noted patent include the provision of a swinging thread-laying frame such as frame 40, the installation of the swinging frame in the sewing head of the'machine as described above, the provision of means for not only" locking the needle-bar carrying frame from lateral movement but also for guiding the swinging thread-laying frame, and modification of the conventional needle-bar jogging mechanism to the new service of joggingthe thread-laying frame.

Having thus set forth we claim herein is:'

1. In a sewing machine adapted to present-one'o'f more the nature of the invention, what cords to the action of' the usual stitch forming in'str'umentalities, and having" a. ewing head", a needle-bar bracket, means securingsaid bracket to said sewing head, a needle-bar journaled for endwisereciprocatory motion in said bracket, and means arranged in said sewing head for actuating said needle-bar, cord-laying. mechanism comprising a frame interposed between said sewing head and said needle-bar bracket, said frame being supported on said needle-bar bracket securing means for movement in a direction transversely of the endwise reciprocatory motion of said needle-bar, means driven by said needlebar actuating means for reciprocating said frame, and a cord-laying finger carried by said frame.

2. A sewing machine adapted to present one or more cords to the action of the usual stitch-forming instrumentalities, comprising a sewing head, a needle-bar bracket, vertically spaced pins securing said needle-bar bracket to said sewing head, a needle-bar journaled for endwise reciprocatory motion in said bracket, means arranged in said sewing head for actuating said needle-bar, a frame interposed between said sewing head and said needle-bar bracket, said frame being pivotally mounted on one of said vertically spaced pins, means driven by said needle-bar actuating means for oscillating said frame, and a'cord laying-finger carried by said frame.

3. In a sewingmachine having a sewing head, an endwise reciprocatory needle-barcarried in said sewing head, a needle secured in said bar, a work-feeding mechanism determining with said needle a line of seam formation, a presser-bar carried in said sewing head rearwardly of the needle-carrying bar in the line of scam formation, a cordlaying mechanism comprising a frame pivoted in said sewing-head between said needle and said presser-bar, means actuated by said sewing machine for oscillating said frame,and acord-laying finger extending from said frame to a point infront of said needle in the line of seam formation.

4 Acord-laying frame adaptedfor use in the conversion into a cord-laying sewing machine of a zigzag sewing machine of: the type havinga vertically'movable presser device, a= needlc-bancarryingbracket which is pivotally supported for movements'transversely of said presser device, and a needle-bar jogging mechanism for said bracket, said frame comprising an elongated rigid support member, me'ansarranged at a'first extremity of said support member and adapted to embrace the pivotal support for said needle-bar carrying bracket, a cord-laying finger slidably carried in the opposite extremity of said support member for movement toward and away from said first extremity, means carried by said cord-laying finger and adapted to effect sliding movements of said cord-laying finger in responseto vertical movements of said presser device, and means carried intermediate the extremities of said support member for accommodating an operative connection between the support member and the needle-bar jogging mechanism of the sewing machine.

5. The methodof constructing a straightaway stitching machine with a cord-laying mechanism which comprises the conversion of a zigzag sewing machine of the type including a pivotally supported needle-bar carrying bracket 53' pfoviding a frame with a cord-laying guide attached thereto, journaling said frame on the pivotal support for the'ne'edl'e-bar carrying bracket, providing a means in thenatureof a pin for locking said needle-bar carrying bracket against swinging movement, and utilizing. the needle-banjogging mechanism of the sewing machine for. actuating said cord-laying frame.

References Cited in the file of this patent UNITED STATES PATENTS 781,673 Mueller Feb. 7, 1905

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