US1005831A - Sewing-machine. - Google Patents

Description

M. HEMLEB.

SEWINGy MACHINE. ArPLIoATIoN FILED 11116.14, 190s.

1,005,831, Patented 0111.121911.

A 2 SHEETS-SHEET 1.

6: 12%5111111111111 lll M. HBMLBB. SEWING MACHINE.

APPLICATION FILED 116.14, 1908.

1,005,831 Patented 001111911.

2 SHEETS-SHEET 2.

CDLUMBIA PLANOGRAPH C0., WASIIINGNN. D. C

in ss n union MAR-TIN HEMLEB, OF ELIZABETH, NEW JERSEY, ASSIGNOR TO THE SINGER MANU- FACTURING COMPANY, A CORPORATIGN OF NEW JERSEY.

SEWING-MACHINE. i

To all whom it may concern:

Be it known that I, MARTIN HEMLEB, a citizen of the United States, residing at Elizabeth, 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.

rlhis invention has for its object to provide a machine for applying loops of thread or cord to the edges of fabrics, and more particularly to the overseamed scalloped edges of lace curtains, for ornamental purposes.

In its preferred form the improvement is embodied in a straight-away stitching machine, and comprises a thread-guide or carrier adapted to oscillate upon an axis substantially parallel with the needle-path across the line of feed and in advance of the needle, a thread-detainer or finger movable to and from the work-plate across the path of movement of said thread-guide and substantially parallel with the needle-path, and means for actuating said thread-guide and thread-detainer once only in the production of a succession or series of stitches, whereby each ornamental thread-loop is attached to the work only at intervals of several stitches.

In the accompanying drawings, Figure 1 is a front side elevation of a Singer chainstitch machine embodying the present improvement, Fig. 2 a plan thereof with the overhanging portion of the bracket-arm removed to expose the parts beneath, Fig. 3 an end view of the machine with the casing for the parts beneath the work-plate removed, and Fig. 4 a detail front elevational view of the edging thread handling members in different positions from those represented in Fig. 1.

The machine is constructed with the usual base 1 and bracket-arm 2, in which latter is jiournaled the needle-actuating rock-shaft 3 having at its forward end a crank-arm 4 connected by means of a pitman 5 with a fixed collar 6 upon the needle-bar 7 carrying the needle 8. The'rock-shaft 3 derives its oscillatory movements through a lateral crank-arm 9 thereon connected by means of a pitman 10 with a crank-pin 1 1 upon the Specification of Letters Patent.

Application led August 14, 1908.

Patented Oct. 17, 1911.

Serial No. 448,493.

balance-wheel 12, which, with the belt-wheel 13, is fixed to the rearward end of the mainshapft 14 which carries at its forward end the single-chain-stitch rotary hook 15 cooperating with the needle 8 in the production of the chain-stitch seam.

The machine is provided with the usual feed-rocker mounted upon a supporting stud 1G and provided with an upright arm 17 to the upper end of which is pivotally secured by means of a pin 18 the feed-bar 19 formed at its outer end with a yoke 20 embracing the lifting cam 21 upon the main-shaft and carrying the feed-dog 22. Operative movements are imparted to the feed-rocker by means of a bar 23 pivotally connected to the arm 17 by a pin 24 and provided with a yoke 25 embracing a cam or eccentric 26 upon the main-shaft adjacent the lifting cam 21. The bar 23 is provided with a forwardly extending member 27 connected by means of a stud-screw 28 with one end of a link 29 whose opposite end is connected by a stud-screw 30 with the stitch-regulating lever 31 fulcrumed at 32 upon the machine frame. As will be observed, the position of the fulcrum-pin 30 determines the direction of movement of the actuating bar 23 under the action of its cam 26 and hence the degree of movement of the rocker-arm 17 andloperative throw of the feed-dog.

The machine is provided with the flat work-plate 33 in which is set the throat-plate 34 provided with a suitable feed-aperture 35, adjacent needle-slot 36 and a detainer receiving slot 37 to be later referred to.

The presser-foot 38 is attached to the lower end of a presser-bar 39 maintained normally pressed downward by means of a spring 40 interposed between a fixed collar 41 thereon and the bottom of the upper bearing lug in the forward portion of the bracket-arm.

The presser-bar is provided adjacent its lower end with spaced collars 42 intermediate which is mounted the loose rocking sleeve 43 provided with a bowed lateral arm 44 having at its outer end a socket 45 in Awhich is secured by means of the set-screw 46 the upper end of the shank 47 of the edgingthread guide or carrier having a laterally and radially offset and contracted lower end portion 48 provided with a thread-eye 49 to which the edging thread is led from a guide-eye 5() in the lower shank portion. As will be observed, the thread-carrier 48, with its vertical axis of movementparallel with the needle-bar is adapted to oscillate across the feed line and in advance of the needle; and this movement is communicated through a second lateral arm 51 upon the rocking sleeve 43 pivotally connected to one end of an adjustable pitman-rod 52 whose opposite end is similarly connected with the free end of a vibrating lever 53 having a boss 54 journaled upon the fixed fulcrum stud-screw 55 and carrying intermediate its ends the roller-stud 56 entering a camgroove 57 in the cam-wheel 58 which is mounted upon a fixed fulcrum stud 59 and provided with a bevel gear-wheel G0 meshing with a bevel pinion 61 fixed upon the mainshaft 14. The gears and 61 are proportioned to effect the rotation of the cam-wheel 58 at oneJthird the speed of the mainshaft 14.

Fixed upon the rearward portion of the work-plate 33 is a bracket 62 provided with spaced bearing lugs 63 in which is ournaled the horizontal rock-shaft 64 provided at its rearward end with a fixed crank-arm 65 carrying a roller-stud 6G entering the lateral cam-groove 67 of the cam-wheel 58. Upon the opposite end of the rock-shaft 64 is fixed by means of the set-screw 68 the lateral crank-arm 69 provided at its outer end with a radial socket in which is secured by means of the set-screw 70 the shank of the threaddetaining finger 71 offset laterally toward the needle-path and having a downwardly extending operative portion 7 2 parallel with the needle and registering with the slot or aperture 37 in the thoat-plate 34.

The rock-shaft 64 aords a fixed fulcruin upon which the linger 7 2 has a substantially rectilinear movement in a plane transverse to the direction of operative movement of the edging-thread guide 48 and to the workplate 33.

As indicated in the drawings, one side of the presser-foot is recessed in its forward portion to embrace the path of movement of the needle 8 and thread-detaining finger 71, and slightly in advance of these members is disposed an edge-guide 73 mounted upon the work-plate adjustably by means of the screw 74'entering a slot 7 5 therein and provided with a guiding edge 7 6 and overhanging lip 77 to properly guide and confine the edge of the work in the stitching operation.

As the stitch-forming and feeding mechanisms are both actuated directly by connections with the main-shaft 14, itis evident that a feeding movement is imparted to the work for each reciprocation of the needle and that stitches of uniform length are produced throughout the operation of the machine; while the rot-ation of the cam-wheel 38 at one-third the speed of the main-shaft 14 causes the edging thread handling implements to perform their cycles of operation o-nce only for each three stitches produced by the machine.

ln threading the machine, the needle thread is led from the thread supply over the guide-hook 78, thence downwardly through the tension 7 9 around the pin 80 and upward again through the tension over the thread-hook 81 and guide-hook 82 through the take-up tube 83 carried by the needle-bar, and thence downwardly through the tension 84 to the eye of the needle. The edging thread is led from the source of supply through an eye in the rigid arm 85 fixed upon the rear side of the bracketarm, thence through an eye in the pull-off arm 86, projecting rearwardly from the needle-actuating rock-shaft 3 in advance of said stationary arm, through an eye in the rearwardly extending and upturned projection 87 of the disk 88 between the tension-disks 89 and thence through the wire thread-guide 90 into the guide-aperture 50 of the thread-carrier whence it is led through the delivery eye 49 to the work.

In the operation of the machine, the presser-foot is raised for the introduction of the work, and subsequently lowered upon the latter, and the thread-carrier, mounted upon the presser-bar, follows such movements and thus remains clear of the work. In the position of the parts represented in Figs. 1, 2 and 8, the thread-guide or carrier is in its extreme left-hand position, and the feed having taken place, kits thread leads from its delivery eye rearward of the needle, which is raised for the initial stitch of the series or succession. As soon as the needle has entered the goods in its initial descent, the thread-carrier moves across the line of feed and reaches its extreme right-hand position as the needle and detaining finger 71 are simultaneously raised. While the needle makes a complete reciprocation for the second stitch, the parts, 48 and 71 remain in the same positions. As the needle descends for the third stitch, the detaining finger 71 also descends in advance of the edging-thread which now leads from the second puncture rearward of the needle to the eye 49 of the thread-carrier, and after the points of the needle and detaining nger are well below the face of the work, the thread-carrier again moves across the line of feed in front of the needle to its extreme position and the needle rises to initial position in readiness for the first descent of a succeeding cycle of operation to cross its thread upon the edgingthread leading from the forward side of the detaining finger' to the eye 49 of the threadcarrier for stitching the same upon the face of the work.

As will be observed the oflice of the detaining finger is to afford a turning point for the edging-thread off the goods such as is provided by the fastening stitches at intervals upon the face of the goods, the detaining finger thus providing slack edgingthread so as to form loose loops extending slightly beyond the edge of the work.

It is evident that, in case the loops of auxiliary thread should be desired upon the face of the fabric, the aperture for the thread-detaining finger may be omitted and the carrying arm 69 adjusted upon its rockshaft to space the point of the finger slightly above the work-plate in its lower position, or the finger might readily be made elastic so as to yield when thrown into contact with the face of the fabric.

I-Iaving thus set forth the nature of the invention, what I claim herein is 1. In a sewing machine, the combination with the main-shaft, stitch-forming mechanism including a rectilinearly reciprocating needle operatively connected with and deriving one reciprocation for each revolution of the main-shaft, and feeding mechanism, of a thread-guide movable crosswise of the direction of feed in advance of the needlepath, a thread-detainer with means for confining it to movement in a plane substantially parallel with the needle-path and the direction of feed and transverse to the path of movement of the thread-guide and adapted for engaging and holding thread-loops carried by the thread-guide, a cam member, an operative connection including speed-reducing gearing between the same and said shaft, and independent connections intermediate said cam member and the thread-guide and the thread-detainer respectively, whereby they are adapted to cooperate with each other once for each alternate stitch produced by the stitchforming mechanism.

2. In a sewing machine, the combination with stitch-forming mechanism including a reciprocating needle and feeding mechanism, of a thread-guide adapted to oscillate across the line of feed in advance of the stitch-forming mechanism upon and concentrically with a fulcrum disposed substantially parallel with the needle-path, the delivery orifice of said thread-guide being directed toward its axis of oscillation, means for actuating the same, and a thread-detainer cooperating with said thread-guide and movable at one side of and substantially parallel with said needle-path, and means for actuating the same.

mechanism, and a thread-detainer coper- I ating therewith and provided with means whereby it is confined to a substantially rectilinear path of movement in a plane transverse to that of the thread-guide, and mechanism acting independently of the stitch-forming mechanism and including an actuating member having a cycle of movement embracing that of a succession of stitch formations and independent connections between the same and said threadguide and thread-detainer respectively.

4;. In a sewing machine, the combination with a rotary shaft and stitch-forming and feeding mechanisms operatively connected therewith, of a thread-guide movable across the line of feed in advance of the stitchforming mechanism and a thread-det-ainer coperating therewith, a cam-wheel provided with -cam grooves, an operative connection including speed-reducing gearing between the same and said shaft, two vibrating levers each carrying a stud entering one of said cam grooves, and operative connections intermediate said levers and the threadguide and the threaddetainer, respectively.

5. In a sewing machine, the combination with stitch-forming mechanism including a reciprocating needle, feeding mechanism, and a presser-bar carrying a presser-foot, of a rocking sleeve upon said presser-bar provided with a lateral arm, a depending thread-guide mounted upon said lateral arm o-f the rocking sleeve and formed with laterally and radially offset operative end portion containing a thread delivery eye, a thread-detainer for engaging and holding loops of thread carried by the thread-guide, and means for oscillating said sleeve to move the thread-guide to and fro in advance of the needle-path.

6. In a sewing machine, the combination with stitch-forming mechanism including a. reciprocating needle, feeding mechanism, and a throat-plate provided with a feed opening and needle-hole and an adjacent aperture, of a thread-guide movable across the line of feed in advance of said needle, a thread-detaining finger having an operative portion substantially parallel with said needle and adapted to enter and emerge from the aperture adjacent the needle-hole, and actuating means for said thread-guide and thread-detaining finger.

7 In a sewing machine, the combination with stitch-forming mechanism including a reciprocating needle, feeding mechanism, and a throat-plate provided with a feed opening and needle-hole and an adjacent In testimony whereof, I have signed my aperture, of a thread-guide movable across name to thls speclfcatlon, 1n the presencel the line of feed 1n advance of said needle, of two subscrlblng Witnesses.

a thread-detaning finger adapted to enter MARTIN I-IEMLEB. and emerge from the aperture adjacent the Witnesses:

needle-hole, and actuating means for said D. B. BIRNIE,

thread-guide and thread-detanng finger. H. J. MELER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.

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