US290952A - weiss - Google Patents

Description

(Np Model.) 4 sheets-sheet 1.

C. W. WEISS.

. BAG SEWING MACHINE. y N0. 290,952. Patented Dec. 25, 1883.

^ INVENTOR;

`WITNESSES; P1 4 JW M (No Model.) 4 sheets-sheet 2.

C. W. WEISS.

BAG SEWING MACHINE. No.'290,952. l f'PaJ'elltedI Dec, 1883.-..

'ri' PLI N ,Y @pw L Si In L

wlTNEssEs; f 2 WNOB' md5 v By his.-ltzorneys, I

. N. PETERS. Nummer. wnsh'wgcm n, C;

(No Medel.) Y Y @sheets-sheet 3. e C. W. WESS;

. BAG SEWING MACHINE. Ne.z9o,952. Patented Dee. 25,. 188s.

-By his ./lttorneys,

N. PETERS Phommmwnpmr. wnhinpm. u. c.

(No Model.) f .0. W. WEISS. t

BAG SEWlNG MACHINE.

4 Sheets-Sheet 4.

170-290,952. 11m@mawDec.25,1883.V

INVENTOR:

7 UNITED-STATES -A PATENT AOEEI'OE.

cHARLES W. WEISS, OE' BROOKLYN, NEW YORK, AsSIGNOR, EY DIREOT AND, Y s

MESNE ASSIGNMENTS, To GEORGE I. OULLMER, GEORGE GORRETT, AND SARAHA. MARTIN, OE SAME PLAGE, AND GEO. W. OORRETT AND WM.

w. OORBETT, OE NEW BRIGHTON, NEW YORK.

vBAG-SEWING MACHINE.

SPECIFICATION forming part of Letters Patent No. 290,952, dated December 25, 188?.

Application filed-March 27, 1883.

1 o all whom, it may concern.-

Be it known that I, CHARLES W. -WEISS, a citizen of the United States, residing at Brookl lyn, in the county of Kings and State of New York,lhave invented certain Improvements in Machines for Sewing Up the Months of Bags, of which the following is a specication. My invention relates to that class of. Ina- Io chines which are employed for closing-the months of filled sacks or bags by stitching. The sewing-machine is mounted to slide on guides, and the stitching mechanism is actuatedby the engagement of a pinion with a fixed rack. A belt or friction mechanism might, however, be substituted for the rack andpinion.

My improvements relate, in part, to the mechanism for stretching and Supporting the 2o bag-mouth while it is being sewed, in part to the construction of the stitching mechanism,

and in part to a thread-cutting mechanism.

I will now describe my improved machine with reference to the accompanying draw- 2 5 ings, in whichM Figure 1 is a plan of the same. Fig. 2 is an end' elevation. Fig. 3 is a bottom view, or view of the under side,of the sewingnnachine or mechanism. Fig. 4 is a front elevation,

V5o-and. Figs. 5, 6, 7, and 8 are detached detail views, which will be more fully described hereinafter. Fig. 9 is a vertical section of the machine on line 9 9 in Fig. 1. Figs. 3,'5, 6, 7, and 8 are on a larger scale than the remaining figures.

Let A represent a Suitable table or base, upon which the mechanism is mounted; B B', end frames or supports; C, a connecting-bar or stretcher, upon which the sewing mechan- 40 ism is mounted and on which .it slides; and D, the rack-bar, which also extends between the frames B B and engages a driving-pinion in the sewing-machine, as `will be hereinafter more fully set forth. y

Eisthe frame of the sewing-machineproper, which has sliding bearings ata a on the bar C anda bearing at b on the rackbar D. To this frame E Vare attached cross-handles F F,

(No modchi whereby the machine may be moved back and forth along the rack-bar. This is done by 5o grasping the two handles F with the hands.

-G (in Fig. 2 only) is the thread-holder; c, the thread; d, the tension device; H, the needle-bar; c, the needle-socket; f, the needle; I, the needle-plate, and J the presser-foot. This 5 5 foot is attached to a leverearm, K, which is pivoted to the machineframe,'and provided with a spring, g, which keeps the presser-foot pressed up normally toward the needle-plate.

Mounted rotatively in the frameE (see Figs. 6o

1, 2, and 9) is the driving-shaft h, bearing the main driving spur-wheel i of the train, and mounted loosely on said shaft his the drivingpinion j, which meshes with the teeth on 'rack D. To this pinion is attached a ratchet-wheel, 6 5 k, which is engaged by a pawl, Z, on the spurwheel i, whereby, when the machine is moved along the rack in one direction, the pinion is caused to drive the train, but when moved in the other direction the pawl rides over the 7o ratchet, and the train is not driven. The spur-wheel t' meshes with a pinion, i', on an intermediate shaft, m, and a spur-wheel, n, on this shaft meshes with the pinion n on the shaft o, which bears the crank-wheel L, which 7 5 reciprocates the needle-bar H.

Figs. 5, 6, and 7 illustrate the needlebar and its operative mechanism on a'scale double that4 of Fig. 1. Figs. 6 and 7 are respectively sectional views taken on lines 6 6 and 7 7 in 8O Fig. 5,*the former showing, also, the base or frame E in section. In Fig. 5 I have shown the needlebar viewed from its under side and detached from the extraneous features of the machine. It is provided with a longitudinal 85 guide-slot, p, through which the shaft m passes.

In a wider continuation, p', of this Slot is litted a block, q,which is bored to receive an eccentric, r, on the crank-shaft o. A cross-slot, p2, in the bar'is engaged by a block, s, bored to receive 59o the crank-pin s. It will readily be seenthat in this construction the rotation of the crankwheel L will impart two motions to the needle-bar: iirst, a reciprocating motion by reason of the engagement of the block s and pin s withslotp, and ,second,a slightlaterallyswing- Adenier extremity of the shai't o is fixed the hook a, (see Fig. 3,) which i'ornis the cliaiii-stiteli. The hook is the same as that in the well-kiiown \Villcox & Gibbs sewing-machine, or it may be the same. This hook is not set exactly concentric with the axis of its shaft, for reasons thatwillbehereinafterexplained. Theblocks q and s each extend about half-way through the needle-bar, and rest on and play over each other when the machine is in motion. These blocks are longer than the width of the slots they cross, wherebv their free movement is secured.

I will now describe the means lor supporting and stretching the mouth of the bag` in order that it may be firmly held and strained while it is being stitched.

Referring` particularly to Figs. l and Hle, M is aliook orliook-rod mounted in abeariiig, c, in the end frame, B', and provided with a spring, ir, on its shank. By pullingin the hook, the spring may be compressed by the sliding of the hook through its bearing; but the spring is made strong enough to resist considerable force exerted to move the hook. In a bracket, N, secured to bar C, is mounted another hook, M', which has two bearings, c' r, and a lia-ndle, rv. This hook has a collar, y, on its shank, which prevents it from being drawn out or back too far, and a friction-clutch, which holds it when drawn back. This clutch consists of alever, e, loosely pivoted at a in the bracket N. The shank of hook M passes loosely through a hole in lever s, and a coil-spring, b, arranged between the lever and bearing 1;',cants the lever forward, normally, as far as it can go. \Vhen caiited in this manner, the hook may be drawn back, (to the left in Fig. 4,) but cannot k be moved in the other direction, except by pressing back lever so as to compress the spring b. A ratchet device or some other kiiowu form of brake might be substituted 'l'or the clutch just described.

The length ot' the machine-that is, the space between the end frames B and B-will depend upon the kind of work to be done. It should be long enough to take in bags of the largest size intended to be sewed.

The bag to be sewed may be set on a platform of such a height as to bring the top of the bag up to the level of the machine; but this is not a matter of importance so i'ar as my present invention is concerned.

I will now describe the operation of the machine.

4A lilled bag is placed on the platform or floor inthe proper position, and the hook M is made to engage its mouth, as indica-ted by the dotted lines in Figs. l and 4. The hook VMis then made to engage the mouth on the opposite side in the same way, andthe mouth is then stretched ilat by drawing out the hook M until the collar y strikes the bearing c. If the bag is a little narrower than the standard or normal size, the spring w will permit hook M to yield a little. All the variation should be at the hook M, as it is important that the other edge of the bag-niouth should be properly presented to the needle of the machinethat is to say, when the sewing-machine stands at the starting-point, as in Figs. 1 and 4, it is as far to the left as it can go, its bearing c bcing in contact with the bracket N. The needle f then stands in a certain position with respect to the tip of hook M, when the latter is diawii back until collar y contacts with bearing c. Fig. l shows this position of the parts, and illustrates the position of the needle with respect to the edge of the bag where the stitching begins. It is important that the stitching should begin close to the edge of the bag, and also that at its iirst stioke the needle should enter the material of the ba". It will be understood that by adjusting or setting 'the' bracket N along on the rod C the machine may be adapted to sew any size of bag smaller than the maximum, as this bracket serves as a stop for the movement of the machine toward the left; but the slight variation in one class oi" bags is taken up by spring w. Before the stretching of the bag is completed, care should be taken that the edge of the same be properly clamped between the presser-foot J and needle-plate l. Everything being now ready, the operator grasps the cross-liaiidle F a-iid pulls or pushes the sewing-inachine along on its bearings (at a and b) toward the right in Fig. 4. The engagement of the pinion j with the fixed rack D produces rotary motion of the hook yu and reeiproeatioii of the needle f through the medium of the mechanism hereinbefore described. Vhen the machine has been pushed along far enough to stitch across the bag-nioutli, the crank-wheel L strikes a pad O, mounted on some fixed part of the frame, and -this arrests simultaneously the movement of the machine and the rotation of said wheel L. This is very important, as the ratclicting of the pinion would, even though the movement of the machine were stopped, permit the momentum of thecrank wheel to reciprocate the needle several times and tangle the thread around the hook. The thread is now cut by a mechanism mounted on the sewing-machine, which I will now describe with reference to Figs. 2, 3, and S, the latter oflwhich is a rear view of the needle-plate, showing the euttei1 mounted therein. In the needle-plate I i's a hole or slot, o,tli rough which the needle plays7 and on the needle-plate adjacent to this slot is pivoted the cutter or cut ting-blade d. The tail e of this blade is bent into a curve and slotted. to receive a pin, g', on the lower end of a lever, P, pivoted to the frame E, and provided with a retractingspring, h. \Vhen this lever is pushed over,

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(tothe left in Fig. 2,) the blade d( is caused toplay across the slot c and cut oft1 the thread which is stretched between the hook a and the ma-terial of the bag. rlhe machine is now pushed back to the startingpoint, the bag released from the hooks, and another bag placed for sewing.

I will now explain the object I have in giv-` ingf'to the needle-bar the lateral horizontal swing by" means of the eccentric r, (shown in `Figs. 5, and 7.)

chine is movingwhile it is in the goods or sufficient to effect it.

material of the bag-that is, during that half of its movement while it is engaged with-the material of the bag, or nearly so-thus compensating for the forward movement of the machine by a backward movement of its needle. This movementis not usually great; but, whatever it may be, the eccentric o" should bev As the needle must correspond to the hook u, I set the hook ec centric with the shaft o to the proper-extent, as before stated. To swing the needle laterally at the proper time-that is, while in the material being sewed-the throw of the eccentric is set opposite to the crank-pin s', and the hook u is set over to the same side.

I wish it understood that I do not limit myself to the precise construction and arrangement of the parts as herein shown, as these may be departed from to some extent without materially affecting my inventionas, for example,a cam in lieu of eccentric r mightbe employed for imparting a lateral motion to the needle-bar, and some other well-known form of hook a might be employed in lieu of that shown. The hooks M M might also be pinchers to grasp the bag.

I do not claim, broadly, every form of inachine for sewing up the mouths of bags, nor a machine for this purpose actuated by moving it along a fixed rack; but

What I believe to be new and what Iclaim 1s- 1. In a machine for sewing up the mouths of bags, the mechanism for stretching and supporting the mouth of the bag, comprising the hook M, provided with a pendent projection at its tip to engage the bag-mouth, the sliding hook M', provided with a like pendent projection, and the clutch-lever z and its spring, all arranged to operate substantially as set forth.

2. In a machine for sewing up the mouths of bags, the coinbination of the hook M, mounted to slide in its bearing, and provided with a spring, fw, the hook M', mounted to slide in its bearings, and provided with a stop-collar,

y, and means, substantially as described,l for clutching and holding said hook when drawn back in stretching the mouth of the bag, all arranged to operate substantially as set forth.

3. The combination, in a machine for sewing up the mouths of bags, of the means for imparting to the needle a longitudinal reciprocating and lateral oscillating motion, comprising the cross-slotted needle-bar, the shaft ,0, eccentric 11, wheel L, and its crank-pin s', and the sliding blocks q and s, arranged to play or slide over each other, all arranged to operate substantially as set forth.

4.. The combination, in a machine for sewing up the mouths of bags, of the fixed rackbar, the driving-pinion j, the intermediate train of gears, the crank-wheel provided with pin s, the shaft m, the slotted needle-bar, the shaft o, eccentric r, block q, hook a, mounted eccentrically on its shaft, and the needle and its socket, all arranged to operate substantially as set forth.

5. The thread-cutter comprising the blade d', pivoted to the needle-plate and provided with a curved and slotted tail, e', and the lever I?, provided with a pin, g, to engage the slot in said tail e', all arranged to operate substantially as set fort-h.

In witness whereof I have hereunto signed my name in the presence of two subscribing witnesses.

CHARLES NV. WEISS.

Vitiiesses HENRY CoNNn'rT, ARTHUR C. FRAsER.

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