US1548836A - Bead-sewing machine - Google Patents

Description

J. A. GROE BLI BEAD SEWING MACHINE Original Filed Feb. 18, 1921 Aug. 11, 1925.

5 Sheets-Sheet 1 Aug'.11,19zs. v I

J.- GROEBLI BEAD SEWING MACHINE Original Filed Feb. 1.8. 1921 5 Sheets-Sheet 2 Hllll gnbub oq; I

351 M 3 mm; .1414

Aug. 11, 1925.

J. A. GROEBLI BEAD SEWING MACHINE 5 sheets s heet Original Filed Feb. 18, 1921 Patented Aug. 11, 1325.

UNI "S T JOSEPH GROEBIII, OF NEVT YORK, N. Y.

BEAD-SEWING MACE'INE.

Original application filed February 18, 1921 Serial No. 445,943. Divided and this application filed February 28, 1923.

To all whom it may concern Be it known that I, Josnrrr A. GROEBLI, a citizen of the United States, and a resident ofthe city, county, and State of New York, have invented cerain new and useful Improvements in Bead-Sewing Machines, of which the. following is a specification.

My invention relates to bead-sewing machines which are designed for the attachment ofloosely strung beads to a fabric for ornamental or embroidering purposes. And my present improvements are particularly directed to means whereby faults inthe formation of the stitches may be avoided, thereby increasing the accuracy of the machine, and securing a better product therefrom, all as is hereinafter more fullypointed out and claimed.

Inthe drawings, Fig. 1 is a side elevation of a machine embodying my improvements; Fig. -2is a detail taken on the line 2-2 of 1, looking tothe left; Fig. 3isa front elevation; Fig. 4 is an elevation taken from the'side opposite to that shown in Fig.1, ofthe upper portion of the mechanism; Fig. 5 is a View, on the same scale as 4, of the thread tightening mechanism, the bead trough being broken away; Fig. 6 is a cross sectional detail; Fig. 7 is a side elevation on a much enlarged scale, of the looper, bead separatorand attachments; Fig. 8 is a cross sectional view of the same, taken on the line 8-8 of Fig. 7, looking up; Fig. 9 is a detail of part of the feeder actuating mechanism; 10 is a cross sectional view,'on the line '10-10 of Fig.9, looking down; Fig. 11 is a view looking to the right on 9, :portions being omitted; and Fig. 12 is a cross sec- =tional-view, taken on the line 1212 of Fig. 4, looking tothe left, of the cam, bell crank -and'rod for actuating the thread tightening mechanism.

Similar letters of reference designate corresponding parts in all the figures.

Thebase plate 1 of the machine is provided with the usual bracket 2 and arm 3 to carry the mechanism 'located above the base plate; while the needle-and nlpple operating inechanism and the lower elements of the feed directingcontrol are carried in suitable brackets as 4,'5, 6,"attached below the base plate.

The driving shaft 7 through beveled gears 8,-9,-shaft 10, beveled gears 11, 12, shaft 13, eccentric pin 14and sliding bracket 15, re-

Seiial No. 621,755.

ciprocatesthe needle carrier 16 inthe usual manner; and, also, through the eccentric 17. bell crank 18, engaging with the sliding bracket 19, re'ciprocates the needle nipple2 0, in the way well known to those skilled in the art.

Also, the shaft 7, through the wrist pin 30, on eccentric 31, traveling in theslot 32, in the slide 35, moving in'guides 36, 37 in the head plate 33 of the machine, raises and lowers the slide 35, which is provided with a. forked bracket arm 38, carrying a nut 39, meshing with the worm 40 on the tube 41, which is provided with shoulders 42, 43 to prevent its slipping up or down in the channel through the parts of'the-composite, rotatable spindle, which adjusts the position of the stitch forming element above the fabricrelative to'the direction of the fabric feed, as will be explained.

A hollow spindle 44 extends down through brackets 45, 46 on the head plate 33; and at its lower end is provided with a collar 47,

a tube '48, extends down through another bearing 49 on the headplate, which is provided with a sleeve '50. At its upper end the tube 48 is provided with a flange 51.

Andtwo rods 52, 53 are firmly inserted in the collar 47 and'the tube 48 so as to connect them as a unitary structure.

These'rods 52, 53 extend through holes in the nut 39, so that'the nut may slide up'and down upon them without turning. The result of this arrangement is that when the nut 39 is raised or lowered, the tube 41 will be revolved within the composite spindle.

To the lower end ofthe'tube 48 is secured a collar;54, carrying an arm 55,'terminating in a'cleft resistance foot'56, normally posiftioned just above the plane of the fabric. The collar 54 also carries a shank 57 at the lowerend of which is thebead separator 58. At the lower end of'the tube 41 is secured a collar 60, which carries the looper 61.

The fabric feeder is raised and lowered through the following mechanism The feeder bar 72, is provided at its upper end with arms 73, 73, which are pivoted by screw pivots 7 4, 74 to aguide block 75 which slides on the spindle 44, and is, in turn, pivoted at 76 to one arm 77 on a slide 73 which travels in guides 79, 80 on the head plate 33, being normally depressed by a spring 31, and being raised-at each revolution of the shaft 7 by the rocking of the bell crank 82, one arm 83 of which lies under a lug 84 on the slide 78, while the other arm 85 travels against the eccentric 31, being held to duty by a spring 86.

The fabric feeder is moved to and fro by the following mechanism 2- On the shaft 7 is another eccentric 90, against which travels the arm 91 of a rocking bar, the other arm 92 of which rests above an arm 93 on a slide 94 which travels in guide ways 95, 96 in the head plate 33, and is normally raised by a spring 97, interposed between the slide and the head plate. The slide is provided with a forked arm 98, the ends of which are seated in an annular groove 99 in the collar of a sleeve 100, sliding upon a shaft 105 journaled in bearings 106, 107 on the head plate 33. On the shaft 105 is mounted a collar 108 which is provided with an extension 109, which passes through an elongated rectangular opening through a slot in a disk 114 rotatably mounted in lateral extension 115 of the feeder bar 72. In the collar 108 is journaled s at 110 a lever, the lower end 111 of which passes into a slot in the disk 114 and engages with the extension 115, while the upper end 112 lies in an upwardly and outwardly inclined groove 101 in the sleeve 100. And two springs 113, 113 are fastened to the collar 108, their lower ends engaging with the disk 114 in the extension 115, so that the disk and extension may be moved in one direction by the action of the lever arm 111, and may be moved in the other direction by the action of the springs 113, 113.

The adjustment of the various parts of the mechanism is such, that, as is well understood by those skilled in the art, while the needle is raised through the fabric, the feeder bar is raised and swung backward, and lowered; and, when the needle has been lowered below the fabric, the feeder bar is swung forward so as to feed the fabric one stitch step.

The direction of the feeding movement is regulated by means of the hand crank 130, which, through shaft 131, gears 132, 133, 134, shaft 135, gears 136, 137, shaft 138, gears 139, 140, shaft 141, gears 142, 143 turns the needle carrier; and also through shaft 138, gears 144, 145 and shaft 149, and gears 146, 147 turns the spindle 44 and tube 41, and through gear 148 on spindle 44, gear 159 pivoted on the head plate 33, and gear 160 on shaft 105, turns that shaft, so that the direction of the feed movement is always away from the back of the needle and from the arm 55 and its foot 56, and so that the looper and bead separator shall always maintain the same radial relation to the needle, at corresponding stages of the stitch, irrespective of the direction of the feed.

Beyond the lower, narrowed end 155 of a trough 152 is a sprocket wheel 156, the arms 157 of which are spaced to accommodate a bead between every two of them, and may be provided with a circumferential groove, as shown, to receive the thread between the beads.

To the free end of the rocking bar 163 is attached a pawl 175, pressed to duty by a spring, as 176, or other suitable means, and adapted to engage with a ratchet wheel. 177 on the hub 178 of thesprocket wheel 156, which is carried upon a shaft 179 in the end of a rocking bar 183. ()n the end of the shaft 179 is placed a screw cap 180, which is omitted for clearness in F 1. And between the cap 180 and the hub of the sprocket wheel 156 is interposed a coiled spring 181, by the compression of which the sprocket wheel may be braked.

The rocking bar 183 is pivoted at 184 to the bracket 165, and is connected at one end to a spring 185 stretched between it and an anchor point 186 on the bracket 165, which spring normally holds the end of the bar 183, to which it is attached, down against the end 187 of a rod 195. On the shaft 7 is mounted a cam 190, the eccentric portion 191 of which is short and so formed as to give, in rotating, a quick movement to the arm 192, the end of which is provided with a roller 193, traveling against the cam. To the other arm 194 of the bell crank 192, 194, is pivoted, the rod 195, which slides in suitable guides 196, 197 on the bracket 165, and is so located as to bring its upper end directly under the rocking bar 183 which rests upon it; so that when the rod is drawn down it will allow the end of the rocking bar to be drawn down by the spring 185.

The roller 193 is kept to duty on the cam 190, by a spring 198 interposed between the bell crank 192, 194 and the arm 3 of the machine. And the cam 190 is so positioned on the shaft 7 that it will rock the bell crank 192, 194, and lower the rod 195, thereby allowing the rocker arm 183 to be quickly drawn down by the spring 185, just at the instant that the needle is about to descend through the loop of thread which has been cast about it by the looper; with the result that the thread is given a quick jerk, taking up its slack and causing the loop to be drawn snugly around the shank of the needle and under the needle barb, thus avoiding the danger of the barb missing the loop and causing a stitch to be dropped by the machine.

While the needle is raised through the nipple and fabric, the nipple Will remain raised, so as to press the fabric up against the foot of the arm 55 thereby holding the loop of thread, through which the needle rises to make the next stitch, firmly in place between the nipple and fabric, so that, when the needle descends it will draw the new loop through the 01d loop without danger of the barb of the needle catching the old loop the second time.

Just as the needle is about to descend to carry down the new loop, the thread will be given a quick, upward jerk by the arm carrying the bead sprocket at the top of the machine; the effect being to snug up the thread around the shank of the needle so as to insure its catching under the needle barb and not slipping up over it. And in this way I avoid the danger of dropping stitches or of catching the thread the second time in the needle and breaking it, which have been serious drawbacks in the past in the practical operation of machines of this general class.

When the needle descends, the nipple is lowered and the fabric feeding takes place before the needle rises again through the fabric.

It will be understood by those skilled in the art, that details of construction may be modified by the use of mechanical equivalents or the like without departing from the spirit of my invention asLclaimed.

Having thus described my invention, what I claim and desire to secure by Letters Patent of the United States, is

1. The combination, in a sewing machine for applying loosely strung beads to a fabric, embodying a reciprocating needle, a needle nipple, and a looper, of means cooperating with the nipple to grip the loop when the needle descends through it.

2. The combination, in a bead sewing machine embodying a reciprocating needle, a needle nipple, and a looper, of means em bodying a resistance foot partially surrounding the needle and disposed above the fabric and cooperating with the nipple to grip the loop when the needle descends through it.

3. The combination, in a bead sewing ma chine embodying a reciprocating needle, a needle nipple, and a looper, of means embodying a resistance foot with a cleft end disposed above the fabric and cooperating with the nipple to grip the loop when the needle descends through it.

4. The combination, in a bead sewing machine embodying a reciprocating needle, means for pressing the needle-surrounding loop against the under side of the fabric, and resistance means cooperating against the upper side of the fabric and adapted to support the thread during the formation of the stitch.

5. The combination, in a bead sewing machine embodying a reciprocating needle, of loop holding means disposed below the fabric and cooperating loop holding means disposed above the fabric and provided with means for permitting the lateral escape from it of the bead carrying thread.

6. The combination, in a single thread bead-sewing machine embodying an upwardly thrusting reciprocating needle provided with a hook, and a looper for casting the thread around the shank of the needle above the fabric, of thread tightening means adapted to operate to draw the new loop into the hook of the needle.

7. The combination, in a single thread bead-sewing machine embodying an up wardly thrusting reciprocating needle provided with a hook, and a looper for casting the thread around the needle above the fabric, of intermittently acting thread tightening means adapted to operate to draw the new loop into the hook of the needle.

8. The combination, in a single thread bead-sewing machine embodying an upwardly thrusting reciprocating needle provided with a hook, and a looper adapted to cast the' thread around the shank of the needle above the fabric, of thread tightening means consisting of a rocking bar and a moveable thread guide carried thereby and adapted to operate to draw the new loop into the hook of the needle.

9. The combination, in a single thread bead sewing machine embodying a barbed reciprocating needle adapted to draw a loop of the thread through the fabric and pass upward through the loop, of means for casting a new loop around the needle and snugging it below the needle barb, and cooperating, means for positively gripping the preceding loop and preventing its being contracted and caught by the descent of the needle barb through it.

JOSEPH A. GROEBL'I.

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