US256743A

US256743A - roming-er

Info

Publication number: US256743A
Authority: US
Publication date: 1882-04-18
Anticipated expiration: 1899-04-18

Description

(No Model.)

4 Sheets-f-Sheet l. G. S. ROMINGER.

SEWING MACHINE.

vin): 256,743.

Patented Apr. 18, 1882.

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N. PETERS. Phnm-Llmugmplwr, wamingwn, C. c.

(No Model.) 4 sheets--sneety 2.

G. S. ROMINGER.

SEWING! MACHINE.

No. 256,743. Patented Apr.18,1882.

4 Sheets-Sheet 3,

(No Model.)

G. S. ROMINGER.

SEWING MACHINE.

No. 256,743. .Patented Ap1.18,1882.

(No Model.) 4 Sheets-Sheet'4. G. S. ROMINGER.

SEWING MACHINE. No. 256,743. Patented Apr. 18,1882.

N, PETERS, Phnlvuxhngnpnbr, vlamingen. D. C.

UNrrnn Sra-ras .Parana l rtree.

GEORGE S. ROMINGER, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR vTO THE AMERICAN BUTTONHOLE, OVERSEAHING AND SEWING MACHINE COMPANY, OF SAME PLACE.

SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 256,743dated April 18, V1882.

Application filed February 18, 1882.

(No model.)

To all whom yit lmay concern Be it known that I` GEORGE S. ROMINGER, a citizen of the United States, residingin Philadelphia, Pennsylvania, have invented certain Improvements in Sewing-Machines, ot' which the following is a specification.

My improvements in sewing-machines consist, iirst, of certain mechanism for regulating the extent ot' the take-up of the needleio thread; secondly, of certain mechanism for actuating the shuttle-lever from the drivingshaft; thirdly, ot'mechanism whereby the feedlever is hung in such a manner that it is free to be vibrated laterally and vertically; fourthly, of an improved tension device; and, ifthly,

ol' an improvement in shuttle-'drivers forlessening the noise due to their operation.

In the accompanying drawings, Figure 1, Sheet 1, is a vertical section of a sewingina- 2o chine with my improvements; Fig. 2, Sheet 2,

an inverted plan view; Fig. 3, a vertical section on the line l 2, Fig. l; Fig. 4, Sheet 3,4 an elevation of the front end of the machine; Fig. 5, a vertical section on the line 3 4, Fig.

1; Fig. (i, a perspective view of a wire bent to form thread-guides 5 Fig. 7, perspective views of detached parts appertaining to the takeup motion; Fig. 8, perspective views of the shuttlc-carrier; Fig. 9, Sheet 4, a vertical section 3o on the line 5 6, Fig. l; Figs. 1() and 11, de-

tached perspective views of parts composing the device shown in Fig. 9; Fig. 12, a vertical section ofthe device for imparting tension to the needle-thread, and Fig. 13 a perspective view, drawn to an enlarged scale, ot part of Fig. 12.

Referring to Fig. 1, Sheet 1, A is the bedplate of the machine; B, the hollow standard, which is secured to the bed-plate, and from 4o which projects the stationary arm B', terminating in the head D.

E is the driving-shaft, from which a vibra-ting motion is imparted to the shuttle-driving lever F by mechanism explained hereinafter.

G is the feed-motion lever operated from the shaft E; and H is the needle-bar secured to a guided cross-head, I, to a curved groove, in the back ot' which is' adapted a pin on th crank-wheel J of the driving-shaft.

I will in the first instance describe the posi- 5o tive take-up motion illustrated in Figs; l and 5, Sheet 3, on reference to which it will be seen that the needle-bar is arranged to re- -ciprocate in bearings in the head D of the stationary arm, the cross-head I ofthe needlebar being'in the present instance guided and steadied by the presser-bar, as described in Patent No:242,372, granted to my assignees on the 31st. day of May, 1881. To this crosshead, or, it' found more convenient, to the nee- 6o ille-bar itself, is pivoted a lever, K, one arm ot' which projects through a vertically-elongated opening in the side ot' the head D, and has at its outer end an eye, d, to which the needlethread is admitted through a slot shown in Fig. 7. The needle-thread passes from the tension device, referred to hereinafter, through a thread-guide, c, Fig. 4, downward to the guidef, upward and through the eye l ofthe lever K, downward to the guide f', and thence 7o through a guide at the lower end of the needle-bar to the eye ot' the needle. The take-up lever K, being carried by the needle-bar or its cross-head, has a vertical reciprocating motion; but this would not be of sufficient extent to take up the thread unless the movement of the needle-bar should be more extended than circumstances demand, and an extended stroke ofthe needlebar is objectionable for reasons well known to constructors and operators of 8o sewing-machines. For these reasons a motion on its pivot independent ot' its reciprocating motion is imparted to the lever, so that it will take up at the proper time the required amount ot' slack thread. This motion is produced in 85 the present instance by the aid of the plate L, which has a curved slot, lz., adapted to receive a pin on the short arm ofthe lever K, so that as the latter reciprocates with the needle-bar it will be vibrated on its pivot, the slot being of 9o such a shape as to properly time the vibration of the lever in respect to the movement ofthe needle-bar for the proper taking up of the thread.

The plate L may be fixed; but I prefer to make it adjust-able, so that the movement of the take-up lever may be regulated to suit the requirements of different thicknesses of fabric 2 i! eeen-ra to be sewed. This adjustment is effected in the present instance by pivoting the plate at z' to the front plate, b, of the head D of the stationary arm, a screw-stud,j, projecting from the upper end of the plate L through a curved slot, L", in the plate b, and being furnished with a nut, m, for securing the plate L after it has been adjusted.

Fig. 6 illustrates the manner of forming the thread-guides ff' by bending` a wire, M, in the middle to form a loop, and bending it near the ends to form the guides, the bent endsdfsingattached to the front plate, b, of the stationary arm of the machine.

The mechanism throughthemedium of which the shuttle-lever Ffis opera-ted from the driving-shaft E can be best explained by reference to Figs. l, 9, 10, and 11.

Within the standard B is pivoted a bellcrank lever, N, to the short arm n of which is connected the lower end of the eccentric-rod N', the upper end of the latter embracing an eccentric, n', on the driving-shaft. The lower end of the long arm g of the bell-crank lever "N is connected to the shuttle-lever F in the following manner: The said shuttlelever is forked as shown in Fig. 1], so as to present two projections, p p, to the inner side of each of which is secured a hardened-steel plate, q, and between the two plates lits snugly, but so as to slide freely, a cylindrical block, F, also of hardened steel. The lower end of the long arm g of the lever N is beveled and adapted to a countersunk orihce in the upper side of the cylindrical block, a screw, t, passing upward through the block and into the arm, and having a beveled head adapted to a countersunk recess in the under side of the block. As the arm g vibrates in the direction of the arrows, Fig. 9, the block must necessarily slide vertically to a limited extent between and in contact with the hardened-steel plates q q. The block controlled by the arm g must also oscillate to a limited extent between the plates, and, owing to the vibration of the forked end of the shuttle-lever in the are ot' a circle, the block must reciprocate in the forked end of the lever, and must oscillate to a very limited extent on the end of the arm g. It will be seen that ample provision is made for thefreedom of these movements.

A. portion of the shuttle-lever is severed, as shown in Fig. 11, and a set-screw, p', passing through this severed portion, serves to contract the forked end of the lever when the block becomes loose between the plates q q.

The forked end of the lever may be hardened, so as to dispense with the steel plates; but l prefer to use the latter.

The severed ring forming the lower end of the eccentric-rod N' is adapted to the portion d of the pin Q, Fig. 10, the eccentric portion .a of the latter iitting into the severed ring formingthe end of the short arm n of the lever N. By loosening a set-screw, u, the short arm of the lever will loosen its hold of the pin,

and the latter can bc turned to any desired extent, after which it may be again secured to the short arm of the lever by turning the said screw u. By the adjustment of this pin I am enabled to alter the relation to each other of the levers NN', and consequently to determine the path in which the shuttleshall vibrate in respect to the needle.

It will be seen on referring to Figs. 1 and 3 that the lshuttle-lever F is pivoted to a pin, F', secured to the under side of the base-plate, the bearing of the feed-lever G being immediately below the shuttle-lever. It is essential that this feed-lever should' admit of being vibrated both laterally and vertically. Vhile it might be-connected by a universal joint to the pin F', I prefer to utilize the hub f2 ot' the shuttlc-lever in the following manner: This hub is reduced in diameter for receiving a ring, o, Fig. 3, which is confined to its place by a washer and nut, h'. The feed-lever G has a recess, 71,2, into which the hubf2 and the ring e extend, and the said feed-lever is provided with set-Screws 'U' o', the points of which are adapted to recesses in the ring. This device forms a universal joint, as the feed-lever can vibrate horizontally with the ring on the hub of the shuttle-lever and vertically with its pivotpins fv' e' on the ring, which might be adapted to the pin F', but, as bet'ore remarked, I prefer to apply it to the hub of the shuttlelever.

It has not been deemed necessary to describe the mechanism for operating the feed-lever from the driving-shaft', as it may be the saine as that for which Letters Patent No. 237,704: were granted to my assignees on the15th day of February, 1881.

The tension device for imparting tension to the needle-thread is shown in Figs. 1,12, and 13, and consists of a spring-plate, W, loosely connected at one end to an arm, w, on the stationary arm of the machine, Aand caused to bear at its opposite end by means of a setscrew, y, with more or less force on the thread as it passes in contact with the top of another arm, fw'. This a well-known device, on which I have made an improvement, which can be best described on reference to the enlarged perspectiveview, Fig.l3. A plate,W', isloosely connected to the arm w', so that it is at liberty to move in every direction and accommodate itself to the spring-plate, so that the parallelism of the plate W' with the spring-plate and uniformity of friction, and consequent uniformity of tension on the thread, will always be assured.

Different modes of loosely connecting the plate W' with the arm w' will readily suggest themselves. In the present instance there is a lug on the under side of the plate, and a loose pin passes through the arm and luO.

Heretofore in connection with tension devices of the class to which the improvement relates it has been the practice to use an eye, through which the thread had to be passed.

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In order to obviate the threading of this eye I use a simple-.hook,g/, into which the thread can be promptly introduced,the character and position of this hook being too clearly shown in Figs. 12 and 13 to need description.

Shuttle-drivers of different shapes, according to the conformation of the shuttle, have always projections or lips, one for striking one end, and the other for striking the other end, of the shuttle; and as the shuttle must always be loose between the projections or lips more or less noise must always accompany the action of the driver on the shuttle. I have ascer- -tained that this noise may be materially diminished by discarding the usual driver of solid metal and so making it of two parts that although one lits comparatively close to the other the sound due to the striking of the shuttle will be partially absorbed or deadened. In the machines to which my improvements relate it has been usual to secure a shuttle-driver of the shape shown in Fig. Sto theend of the shuttle-lever. This driver T has lips 2 2, which, together with the ledge 3, forma loose pocket for the shuttle. Instead of making this driver ofone solid piece of metal. as usual, I make it in two parts, the part T' fitting into the corresponding part T and the projections 4 et of both being attached to the end of the shuttlelever. Although the two parts fit together snugly enough to make an available shuttledriver, they must necessarily be free from absolute contact with each other at one or more points, and hence, for well-known reasons,the rattling noise caused by the lips striking the shuttle will be materially diminished. It is not essential, however, in carrying out this feature of myinvention that one part ofthe driver ,should be the counterpart of the other, for the same or approximately the same end could be attained by any such application to the shuttlc-driver of a plate or plates as would have a tendency, by their contiguity to the driver, to deaden the rattling noise.

I claim as my inventionl. The combination of the needle-bar or crosshead and its pivoted take-up lever with the adjustable slotted plate L and a device for securing thc said plate after adjustment, substantially as described.

2. The combination oi' thc arm g and mechanism for vibrating the same with the shuttlelever F, provided with projectionsp p, having plane inner faces, and the cylindrical block l?, adapted to slide and oscillate between the projections and on the lower end of the said arm g, substantially as specified.

3. The combination of the arm g, having a beveled lower end, thccylindricalblock I?, having an opening, with conntersunk ends, the setscrew t, having a beveled head and the shuttlc-lever having projections p p for embracing the block I),as set forth.

et. The combination of the rod N, actuated by the driving-shaft, and thelever N, pivoted to the frame of the machine, with a connecting-pin, Q, having two portions, a and a', the former eccentric in respect to the latter, one portion being adapted to the said rod N and the other to an arm of the lever N, all substantially as set forth.

5. The combination of the feed-lever Gr, its recess h2, and pivot-pins 'u' e with the shuttle-lever, its hubfz, and ring a, extendinginto the recess, all substantially as set forth.

6. Atensiondevice in which two xed arms, fw w', and a spring-plate, W, loosely connected to the arm w and acted on by a set-screw, are combined with a plate, W', having a projection tting in an orifice in the arm w', to which the said projection is loosely connected by a pin, all substantially as described.

7. The combination of the arms w fw and the plates W and W', of the tension fdevice and a thread-guiding hook, y', situated at the rear and clear of said plate IV', as speciled.

S. The shuttle-driverconsisting of two metal plates, T T, conforming substantially with each other and constructed for attachment to the shuttle-lever, as set forth.

In testimony whereofIhave signed my name to this specilication in the presence of two subscribing witnesses.

GE-o. s. ROMINGER.

Witnesses:

HARRY DRURY, HARRY SMITH.