US86164A - Improvement in sewing-machines - Google Patents

Description

3 Sheets-Sheet 1.

J. T. jONES.

Sewing Machine.

Patented Jany 26, 1s69.

3 Sheets-Sheet 2.-

1. T. JONES. Sewing Machine.

Patented .lany 26, 1869.

PETERS. Phuluuthugmphur. vla-mmm. DJ;

3 Sheets-Sheet 3.

J. T. JONES.

Sewing Machine,

Patented Jany 26, 1869.

dnited gister @sind dimite.

JOHN THOMAS JONES, OF NEW YORK, N. Y., ASSIGNOR TO THE SINGER MANUFACTURING COlWPANY.

Letters Patent No. 86,164, dated January 26, 1869.

IMPROVEIVIENT IN SEWING-MACHINES.

The Schedule referred to in these Lettere Patent and making part: of the same.

To all whom it may conce/m e it known that I, Joris THoMAs J oivns, of the city, county, and 'State of New York, have invented certain new and useful Improvements in Sewing-Machines; and that the following is a fuil, clear, and exact description and specification of my said invention.

My invention-consists ot' certain improvements in the construction otsewing-machines. These constitute parts of my invention, and may be used severally or collectively, as circumstances render expedient.

My first improvement relates to the means for dm'v ing a transverse shuttle, by which I mean a shuttle moving transversely to the line of feed; and its object isto operate said shuttle from the driving-shaft of the needle, or some other shaft that is parallel with the shuttle-race, or thereabouts, in a simple manner, and without the use ot' counter-shafts or gearing. This improvement consists ,f the combination of the shuttle-driver with the driving-shaft of the needle, byv v mea-ns of a bell-crank, vibrating in the plane ofthe said shaft, and a connecting-rod, operating upon ballcrank pins, secured to the driving-shaft and bell-crank, so that the rod adapts itself to the variation in the Arelative positions of the two crank-pins.

The objectof the next improvement is to permit a reciprocating feed-bar to be rcadiiy changed, so that feed-bars, having ieeding-smfapes of different qualities, caribe used in the machine, 'as required by the work. This in'iprovement consists of the combination of the feed-bar with its drivel', by means of a fork and rocking' tooth, and covering said feed-bar by a sliding plate, so that, by simply moving said sliding plate, the feedbar may be disconnected from its driver simply by lifting it, and consequently one feed-bar can be readily removed from the machine, and another dropped into its place.

. The object of the next part of my invention is to cause the feed-bar to be moved positively (without the action of a spring) in both directions, with intervals of rest between its movements and it consists of the combination of the feed-bar with the revolving shaft that drives it, by means of a triangular cam, working in a q nadrangular ring-trame, applied to the end ofthe connecting-rod that transmits motion to the feed-bar.

The object ofthe next improvement is to enable the feed-bar, while moved positively in both directions, to be adjusted to vary the length of motion ofthe feedbar, and consequently the length of the feed. It consists of the combination of the feed-bar with the rotating shaft that drives it, through the intervention of a cam, operating in a ring-frame, and a pin, sliding in a slot in a rocking arm, to which said cam imparts motion, so that while the cam imparts a positive motion to the feed-bar in bot-h directions, the extent of that motion may he varied by varying the position of the pin in the slot of the rocking arm.

The object of the next improvement is to prevent excessive wear between the feed-bar and the instrument for raising and lowering it, and consists of the combination of the feed-bar with a rocking cam for lifting it, which can be so operated as to remain at rest, or thereabouts, while the feed-bar -is reciprocating, and is constructed with a flat side, which presents a broad, flat surface for the feed-bar to slide upon.

The object of the next part of my invention is to permit the presser-foot to be turned horizontally, without the necessity of disconnecting it from its shank, and consists of the combination of a round presserfoot shank with a guiding slide, by means of a piu and notch, or their equivalent-s, which permit the. shank and presser-foot to be readily turned by hand, but hold them in their proper positions during the operations of the machine.

In order that my invention may be fully understood, I havev represented, in the .accompanying drawings, a sewing-machine which embodies all parts of my invention, and l will proceed to describe it.

Figure l represents a view ofthe machine, with certain parts removed, to permit the residue tobe seen;

Figure 2 represents a top view of the machine, with theplate of the bed and the .parts above it removed;

Figure S'represents a vertical transverse section of the machine at the line a: x of iig. 1

Figure 4 represents a fragmentary side view of the machine;

Figure 5 represents a transverse section of parts of the machine at the line y y of lig. 1

Figure 6 represents a rear View of certain parts of the machine;

Figure 7 repcsents a top view of parts of the ma chine;

Figure 8 represents a front view of a portion of the needle-arm, and the adjacent parts;

Figure 9 represents a section of the wheel presserfoot through the axis of the arm on which the wheel rotates; and

Figure 10 represents a view of a dat presser-footA fitted to be used on the machine.

The first six of said figures are drawn upon a scale of half the working dimensions. The last four figures represent the parts of the working size.

The bed-plate A of the machine is supportedrupon a table, B, and is connected with it by hinges, which permit the machine to be turned up cdgewise, for examination, and for other purposes.

The needle c of the machine is carried by a sliding needle-bar, G, to which motion is imparted, as in the ordinary Singer sewing-machine, by means of a rotating driving-shaft, D,which traverses the needle-'arm E longitudinally, and is fitted, at its front end, with a. crank-pin, which works in a cam-plate, secured to the needle-bar, the crank-pin being fitted with a frictionwheel, as is usual in such cases.

The drivin g-shaft D is fitted, at its rear end, with a iy-wheel, F, and with a grooved belt-pulley, G, to which motion is imparted by a driving-belt, H, in the usual manner.

The driving-belt is conducted downwards to a treadlemotion beneath the machine, and the part of the belt above the table is protected by a cover, K.

In order that the machine may embody the first of my invention, this cover K is made fast to the bedplate A of the machine, instead, as heretofore, to the table of the treadle-motion Ahence the cover does not require to be removed when the machine is turned up from the table B, but comes up'with the machine, thereby saving the trouble of unscrewing it, and replacing it afterward.

The shuttle I of the machine is constructed to traverse in a shuttle-race, L, Whose direction is transverse to the line of the feed, and parallel with the line of the needle-arm E, and with the axis of the driving-shaft D.

In order that the next part of Vmy invention may be embodied in the machine, the shuttle-driver J vis connected by a rod, b, with one of the arms c of a bellerank, M, and the other arm c', of said bell-crank, is connected by a rod, b, with the crank d of the drivingshaft D.

rIhe plane of vibration of the bell-crank is in the axis of the driving-shaft, or thereabouts, and is consequently perpendicular to the plane of revolution ofthe crank (l of that shaft, and in order that the connecting-rod b', between the crank and bell-crank, may accommodate itself to this peculiarity of arrangement, the crank-pin of the crank d, and the pin of the arm c of the bellcrank, are made of ball-form, as represented in dotted lines in iig. 1, and the stub-ends e c, of the connectii'lgrod b', are of corresponding form internally, so that the connecting-rod can swivel upon the pins.

The machine is provided with a reciprocating roughsurfaced feed-mechanism, and in order that the next part of my invention may be embodied in the machine, the feed-bar N, or feed-dog, as it is sometimes called, is constructed with a fork, g, at its under side, which ts loosely upon the end or tooth h of a reciprocating arm or drivel', f, by which motion is impalted to the feed-bar, so thatthe feed-bar lies loosely upon the driver, and can be readily lifted from it.

Moreover, the said slot is closed by a cover or slide, O, which covers the feed-bar up to the aperture in the throat-plate j, through which the end of the feed-bar rises, so that the removal of this cover leaves the feedbar free tobe lifted out of the machine.

In order that the next part of my inventioumay be embodied in the machine, the feed-bar is causedto reciprocate in the line of the feed by the rocking ofthe driver f, which projects from a rock-shaft, P, and to which motion is transmitted from the driving-shaft D, through a cam, Q, a connectingrod,` R, acounter rockshaft, Pa connecting-rod, R', and the arms la k k2, secured to said rock-shaft.-

i The cam Q (see Figure 3) is triangular,`with the apex nearest the shaft, and it Works iu a cuadrangular ring, S, formed upon the upper end of the connecting-rod It, the effect of this construction being to leave the connecting-rod It and its connections, including the feed-bar N, practically stationary at the extremes of its stroke, and as the connection between the feed-bar and the driving-shaft is never broken nor intermitted, and no spring is required to canse the feed-bar toretrograde, the movement of the feed-bar is positive in both directions.

In order that the nextpart of my invention may be embodied in the machine, thel arm c of the counter rbs'haft P' is formed with a slot extending radially to the roEk-shaft, and a block is fitted to slide in this l slot. The block carries the pin t', to which the connecting-rod R is applied, and the connecting-rod has a shifting-rod, T, itted to it. This shifting-rod passes up through a hole in the bed-plate A, and its upper end is formed into a screw, to which a milled nut, m, is applied,\. for the purpose of drawing the shifting-rod up ward. The stem of the shifting-rod, beneath the bedplatc, is fitted with a helical spring, 1m, which, pressing against the shoulder of thc rod, tends to force it and the connecting-rod It dowrnvard.

The' nut and spring, with the shitting-rod T, thus furnish a convenient means ot' moving the connectingrod andthe slide-block of its pin toward or from the axis of the counter rock-shaft, thereby varying the extent of movement of thc pin z', and consequently the extent of movement ot' the feed-bar N,'which receives its motion through thatpin.

. The feed-bar N is lifted and lowered, to seize and release the material being sewed, by means o f arocking cam, U, which is secured to the end of a rock-shaft, V, which is caused to rock at proper times by acam, Q', secul'ed to the driving-shaft l). This cam is triangular, like the other feed-cam, Q, and operates in a quadrangular ring, n, formed upon the upper end of a connecting-rod, X, that is applied toa crank-arm, p, projecting from the rear end of the rock-shait V, so that the lifting-cam U is rocked by the revolution of the driving-shaft, and, from 'the peculiar character of thedriving-cam, the lifting-cam U remains practically stationary at the end of each vibration'.

e The two driving-cams, Q Q', which thus operate the feed, are set at right anglesv to each other, or thereabouts, so that the feed-bar does not reciprocate materially when it is raised and depressed, and is not maf terially raised or depressed while it is reeiprorated.

In order that the machine may embody the next part of my invention, the lifting-cam U is constructed with one side flat, as at "r, so that it presents a fiat snrface for the feed-bar to slide upon, when pressed in Contact with the material being scwcd. g

I also prefer to construct the iiat snriace upon a separate piece of metal, s, which is secured by a screw to the-body of the cam, so that the said piece can be raised or lowered, to vary the extent of projection of the feed-bar. Moreover, as the said piece is small, it can be readily hardened, so as to present a hard wearing-surface.

The presser-foot W of the machine is ofthe wheel-V variet-y, and is connected with a sliding shank, Y, to which a spring is applied, in the usual manner customary in Singer machines.

' In. order that the machine may embody the next part of my invention, the bearing-arm t, on which the wheel u revolves as an axle, is arranged to project from a stock, fw, at the inner, side of the wheel, instead of at the outer side thereof, as heretofore. This changeiu the arrangement brings the bearing nearer the shank Y than it otherwise would be, and consequently the pressure is more direct. v

,The stock w of the bearing-arm is socketed to iit on tothe lower end of the shank Y, and is secured there by ascrew, x, which passes through a hole made in one side of said socket; hence, by slacking the said screw the wheel-foot may be readily removed, and an ordinary plain-surfaced foot, such as represented at iig. 1U, maybe putin its place, to adapt the machine for work requiring such a foot.

In order that the ncxt part of my invention may be embodied in the machine, the. sha-nk of the presser-foot is made cylindrical, aml is passed through the sleeve 'v of 'a slide,`Z, which extends upward into a slot in the head El of the needle-arm, and slides therein.

Moreover,` the shank Y otthc presser-flint has a pin, z, projecting from one of its sides, which is received in a notch formed in the upper edge ofthe sleeve o of the slide.

The sleeve 'c is slit, and is iitted with a screw, a', to contract it, so that the friction between it and the shank When, however, it is desirable that the presser-foot should be turned out of its position, for the purpose of changing the presser-foot, or for other purposesJ the shank Y may be lifted in the sleeve, so as to disengage the pin zfrom its notch, and permit the shank, with 'the presser-foot, to be turned horizontally to any ref quired position. v

4 The slide Z forms a convenient means of raising the presser-foot, and, for this purpose, is constructed with a. projection, d', upon which the lifting-lever C is constructed to operate.

The machineis provided with a spooler, for the purpose of winding thread upon the spools for the shuttle. This spooler consists of a stock, D2, holding a pulleyshaft, Ei, and a centre, F2, for the end of the spool.

The shaft is constructed with a cup, g2, to take one end of the spool, and with a pulley, covered with a belt of India rubber, m2, to be pressed against and driven by the rim of the y-wheel A The stock D'2 is pivoted to the bed-plate A, so that it may be turned on the pivot n?, to cause the pulley to be driven by the ily-wheel or not.

1u order that the last part of my invention may be embodied in the Ina/chine, a latch, Pi, is pivoted to the table B, so that it may be brought against the edge of 4the spooler when it is turned toward the ily-wheel, and will then hold the pulley-rim m positively against the ily-Wheel when the spooler is to be operated.

When the spooler is to be disconnected, the latch P2 is simply turned on its pivot, as represented in red linesin iig. 7, soas to release the spooler.

Having thus described a machine embodying all my improvements in the best form which I have thus far devised,

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

1. The combination .ofthe transverse shuttle-driver, the driving-Shad; ofthe needle, bell-clank, connectingrods, and ballLcmnk pins, substantially as before set forth.

2. Also, the combination of the feed-bar with the rocking tooth which drives it, and the sliding plate which covers it, so constructed that when the sliding plate is removed, the feed-bar may be dropped into and lifted out of place with facility, substantially as described.

3. Also, the combination of the feed-bar, drivingshaft, triangular cam and connections, substantially as before set forth.

4. Also, the combination of the feed-bar, drivingshaft, triangular cam, connecting-rod, with quadrangular frame, slotted arm, and slide-pin, substantially as before set forth. n

5.' Also, the combination of the feed-bar and flatsided rockin g lifting-cam, rocking intermittently, substantially as before set forth.

6. Also, the combination of the presser-foot shank and guiding slide therefor, substantially as before set forth.

In testimony whereof, I have hereto set my hand, this 14th day of August, A. D. 1868. v

J. T. JONES. Witnesses:

JOHN RATHBONE, Jr., E. S. RENWICK.

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