US31325A - Improvement in sewing-machines - Google Patents

Description

F. NWELLE.

Sewing Machine.

Patented Feb. 5, 1861.

ned-Jas.'

FRANCOIS NIVELLE,

OF PARIS, FRANCE.

IMPROVEMENT lN SEWlNGelVlACl-lllillES.

Specilication forming part of Letters Patent No. 31,325, dated February 5, 1861.

To all whom it may concern:

Be it known that I, FRANCOIS NIVELLE, of Paris, in the Empire of France, have invented certain Improvements in Sewing-Machines; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the annexed sheet of drawings, making a part of this speciteation, in 'which- Figures l and 2 are vertical sections, at right angles to each other, of a machine constructed according to myinvention for making the shuttie-stitch and the double-looped stitch. Fig. 3 is an inverted pian of part of the apparatus for operating the under needle for making the double-looped stitch. Fig. 4 is a face view of the cam for operating the under needle. Fig. 5 is a face view of the cam for operating the shuttle.

Similar letters of reference indicate corresponding parts in the several figures.

My invention consists in an im proved arrangement of the parts, whereby I obtain a machine of A simple construction, capable of workin g either the shuttle-stitch or the doublelooped stitch.

llo enable others skilled in the art to make and use my invention, Iwill proceed to describe its construction and operation.

A is the bed of the machine.

B is the upper frame, having on the top of it the bearings a a for the horizontal main shaft C, and having attached to it the guide for the perforatin'g-needle carrier D and the pressing and feeding foot E.

The main shaft G has fast upon it four cams, F G H I, of which F is to operate the shuttle, G H are to operate the under needle, used in making the double-looped stitch, and I is to operate the feeding apparatus. The cam H also constitutes a pulley to receive a drivingband for driving the machine, and the cam I constitutes a wrist-plate to carry a crank-wrist, b, for operating the perforating-needle u,whose -rcarrier C is connected with the said pin by a connecting-rod, C'.

.The shuttle J rests in a bed provided for it in its driver K, which works in a straight horizontal guide or raceway, L, as in many other machines. The driver has projecting downward from it, through a slot in the bottom of the raceway, a slotted leg, K, in whose slot is received aA pin, d, attached to a rocker, M,

which is arranged to swing in vertical planes works on a fixed fu1crum,f, under the bed A, and whose other end is forked also to receiveV the lower end of an upright lever, O, which Works on a pixed fulcruni, g, secured in the upper frame, B, and whose upper end is furnished with a pin, t', which enters the groove h /L of the cam F. This cam, acting through the levers 0 and N and the rocker M, gives the necessary motion to the shuttle-driver K.

P is a shaft, which is arranged parallel with the main shaft and at right angles tothe shuttle-raceway, in fixed bearingsjj below the bed, in which bearin gs the said shaft is free to oscillate about its axis and to move longitudinally back and forth. rfhis shaft, which is situated above the lever N, passes through the hanging postj',to which the l'ulcrumfof the said lever is attached. One end of the said shaft is constructed to constitute a holder for the under needle, 7a, which operates, in combination with the perforating-needle, to work the double-looped stitch, and which is of very well-known construction, except that its shank is made of crank form, as shown in Fig. 2. The shaft P derives the' necessary longitudinal movement to carry the under needle into the loops of the perforatinw-needle thread and withdraw it therefrom from the cam G, through a lever, Q, which works on a lixed fulcrurn, l, secured in the back of the upper frame, B, the said lever being furnished at its upper end with a stud, on, which enters the groove in the cam G, and at its lower end with a fork, which receives an arm, o, which is secured to the shaft P. The said shaft P receives from the camH the oscillating movement about its axis, by which it carries the under needle, k, laterall y across the path ot' the performing-needle to enable the latter to enter the loops of the under thread, the said cam acting through a rod, R, which works up and down through a fixed guide, p, secured to the upper frame, B, the said rod having attached near its upper end a pin, q, which enters the groove r of the said cam, and having at its lower end a forked arm, u, which takes hold of an arm, s, on the rock-shaft. The movement thus given to the under needle does not differ essentially from that given to the under needle in other sewingmachines, th'ough the manner of imparting the movement is different. The under needle works through an opening, t, provided for the purpose in that side of the raceway L next to which the needle Works.

To enable the machine to work the shuttle stitch or the double-loop stitch it is only necessary to insert either the shuttle or the under needle and to remove the other from the machine. The operating mechanism .for one device does not interfere with the other device.

S is the spool for supplying thread to the upper or perforating needle, and S the spool for supplying thread to the under needle, both.

attached to the upper frame, B, and each provided with a friction apparatus to produce the necessary tension on the thread.

The presser and feeder E is made with a foot substantially like those'used in other sewing-machines, and the face of said foot is serrated or toothed, as shown in Fig. 1, to make it bite the cloth to feed itx in the direction of the arrow shown in that figure. The

lguide in the top frame, B, to which' the stem w, to one end of a short lever, E', which works in a fixed fulcrum, u, secured to the upper frame, B. The other end of thesaid lever E carries an anti-friction roller, x, which is witbin range of a projection, 6, on the cam I, and which, every time the perforating-needle n is passing downward through the cloth, is acted upon by the said projection to raise the presser and feeder from the cloth for the purpose of facilitating the turning of the latter.' The presser and feeder is held down upon the cloth, when not thus raised by the cam, by meansxof a spring, U', which is attached to the upper frame, B, and which presses on a shoulder, 7, cn the presser-stem. Another spring, V,attached to the frame B, presses the lower part of tine stem of the presser and the foot in the opposite'direction to the feed movement, as far as is permitted, by a stop, 8, formed by the rigid upper part of the spring close to the attachment of the latter to the frame B. Between the stem E2 of the presser and feeder and the needle-carrier D there is arranged in a cavity within the upper frame, B, a lever, T, working on a fixed fulcrum, z. To the upper endof this lever is attached `an anti-friction roller, 10, which is in range of a projection, 1l, on the cam I, and to the lower end of the said lever there is firmly secured a polygonal eccentric, U, which may be adj usted upon a pivot, 12, to present either of its sides toward thestem of the presser and feeder.

While the perforatingneedle n is out of the cloth the projection 11 of the cam I, revolving in the direction of the arrow shown in Fig. 1, comes into operation on the anti-friction roller 10, and so moves the upper end ofthe lever T in a direction to press the eccentric U against the stem ofthe presserand feeder, and cause the latter to be moved in the required direc tion to feed the cloth. As soon as the projection 11 has passed the roller 10 the spring V presses back the presser and feeder and the lever T, and, as the stop 8 is fixed, the length of the feed movement depends upon the degree of prominence or distance from the center of the pivot 12 of that side of the eccentric U which is toward the stem.

W is a lever, to be operated by hand, for raising and holding up the presser and feeder dur ing the adjustment ofthe work in the machine.

I do not claim providing a sewing-machine with the means of making the shuttle-stitch and the double-looped stitch; but

What I claim as my invention, and desire to secure by Letters Patent, is-

The arrangement of the shuttle-operatin g levers O N and rocker M, and of the oscillating and reciprocating under-needle shaft P 'and its operating-lever Q, rod R, and connection u s, in combination with cams on a driving-shaft, C, arranged above the Aupper frame of the machine, substantially as herein described.

F. NIVELLE. Witnesses: A. GUroN, Jr.,

GEO. HULLM.

Images