USRE9208E - crane - Google Patents

Description

I 4Sheets-8hea-t 2. T. CRANE,

Asslgpor to himself and M. A. Joni Sewing-Machine. I

No. 9,208. Reissued May 18, I880.

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Wilnesges v I oniw; Crane Invenior i Q I) k I 4 Sheets-Sheet 8.- T. CRANE, Assignor to himself and M. A. Jonra Sowing-Machine. No. 9,208 Reissued May 1'8, 18 80.

messes jrrv'anzor .Tlzo m als Crane Ji iornays 'Wjinas ses Invenior Y Thomas 01 1 Jiiornay PATENT O FICE.

THOMAS CRANE, or roar ATKINSON, WISCONSIN, ASSIGNOR TO'HIMSELF AND MELVIN A. JONES.

SEWING-MACHINE.

SPECIFICATION forming part of Reissued Letters Patent m. 9,208,- dated May 18, 1880.

. QriginalNo. 150.532, dated May 5, 1914.. Application for wa filed Decemher'lii, 1819.

I Atkinson, in the county of Jelferson and State H to the flanged raceway.

the cloth-feeder and the means for adjusting.

of Wisconsin, have invented certain new and useful Improvements in Sewing-Machines;

and I do hereby declare that the following is. a full, elear, and exact description thereof,

reference being had to theaccompanyingdrawings, making part of this specification, in

Figure 1 is a view of one side of the ma chine. Fig. 2 is a front-end view of.thc ma.- chine. machine. Fig. 4-is a section taken vertically and longitudinally through the center of the machine. Fig. 5 is a bottom view of the machine. Fig. 6 is a section taken through the machine in the vertical plane indicated by the dotted line m m on Fig. 4. Fig. 7 is a section through Fig. 4 in the horizontal plane 3 3 Fig. 8 is a sectional view, showing the shuttle applied to its flanged raceway and carrier. Fig. 9 is a perspecti ve view ofa shuttleadapted Figs. 10 and 11 show it. Fig. 12 shows my improved tension device applied to the flanged shuttle. Fig. 13 is a view of the open side'of the shuttle. Fig.14 is across-section through the shuttle in the plane .7 2, Fig. 13. Fig. 15. isa bottom view of the shuttle. I I

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

This invention relates to certain novel improvements in shuttle scw'ii|g-machines,'which I will now describe, so that others skilled in the art may understand the same.

In .the accompanying drawings, A represents the cloth-plate, from one end of which rises a hollow standard, A, constructed with an overhangihg arm, 13?, from which descends a pendent bracket, A". l

B rcpresems the driving-slmft, carrying a belt-pulley, b, and an eccentric, c. This-shaft passes through and has its bearing in an arm, I

B, formed on the upper portion of a vertical rock-shafe E, which arm extends nearly as far as the pendent b. ekct A. That portion of the driving-shaft B which is exposed beyoml Fig. 3 is a view of the rear end of the the free end of the horizontallywibratin'g arm vertical slot made through the pendent bracket A? and through the needle-bar B, so that when the shaft B is rotated it will impart a rectilinear reciprocating mot-ion to the needle-bar, which is guided by the said pendent bracket A.

p The rock-shaft E is stepped at 2 in a stirrup; g, and connected atits upper end to the upper end of the, hollow standard A by a pivot-screw, d. The lower end of this rockshaft E is constructed with a. slotted foot, h, from the sides of which foot extend two arms, h h. Theslot or notch in the foot h receives a stud, f which rises from a feed-actuating for the shuttle, and is connected by a'pivot' and. spring-cushion or loose joint, F, to the cloth-plate A, as shown in Figs. 4and 5. This bar'F has the feeder k connected to it, as willv be hereinafterexplained, and it receives a lat- 7o era-l vibrating motion from the foot h'. The rear end of the feed-bar receives looselythroughit a rod, f, having an adjustingnut,

5, on itslower end, on which nut the baris held by a spring, f. The rod f receives from 35 the eccentric c. on shaft 13' vertical motion, which imparts vertical vibration to the feedbarF. Thus it will be seen that the feeder k rcceivcsthe' proper movements for feeding the cloth beneath the needle from the rock-shaft E- and the cam 0" on the main shaft B. The feede is serrated' and slotted, and formed on a plate, k, which is connected to the feed-bar F by means of a pivot-plate, k, as shown in Figs. 1, 2,4, 5, 6, and-l0. has an arm-extension, 6, formed on it, which is guided by a grooved block, m, fixed to the bottom of the cloth-plate. The outer extremity of the arm Ghas a tooth, 4, rising from it, whicliextends through an oblong slot 0 made through the cloth-plate, and plays between one end of this slot andv ashoulder which is formed on a pivoted cam-plate, 5', as shown in Fig. ll. The cam-plate 5 is adjustmcans of a thumb-screw, m, which bears against a curved portion of the edge of the cloth-plate. By a justing the'cam-plate 5 -B is cranked and its end passed through a I bar, F, that extends forward of the raceway l 65 The plate It able, and can be lixed after it is adjusted by 5 the. strokes of thefeeder k can be shortened -or lengthened.

It willv be seen by reference to Fig. 5 that the feed-bar F is made quite thin between the foot h and the plates kit. This is for the purpose of allowing this bar tobend or yield laterally when the feeder k is adjusted for short strokes. 1 This renders unnecessary shortening or lengthening the strokes of the foot h when the feeder is adjusted. If at any time it is found necessary to adjust the vertical strokes of the feeder k, this can be done by means ofthe nut 5 on the screw-threaded end of the eccentric-rod f.

-- (Jv represents a vertical rock-shaft supported upon avertically-adjustable step, z, which is inserted into the foot h of the shaft E, and tightened by means of a nut, 2, as shown in Fig. 4. The upper end of this shaft is steadied by a pivot-screw, d, whichis tapped through the arm A and through the upper curved extension of shaft E. The axes of motion of the two shafts E and O coincide with each other. The 'upper portion of the shaft 0 is of an elliptical form, lipse c the eccentric e and its hub'pass freely, as shown in Figs. 3 and 4. To the ellipse c a yoke, e, is pivoted at e e, which yoke is connected eccentrically to a rounded enlargement on the end of a cam, e, by a pivot, e.

When the shaft B is rotated by a drivingbelt passing over pulley b. this shaft B andthe shaft E will receive-a lateral vibrating motion, in consequence of the eccentric attachment 0. At the same time this attachment .2 will cause the said lateral vibrating motion imparted to the'shaft B to rock the shaft (3 about its axis.

To the lower end'of the rock-shaft O a horizontal arm, D, is rigidly secured, which arm extends forward a suitable distance, and has adjustahly secured to it a shuttle-carrier, D, which receives motion laterall in the arc of a circle. There are two eyes ormed on the ends of the shuttle-carrier D, throughwhich play, the ends of two rods, j j, which rods are connected to the ends of arms h h on the foot 'lt', as shown in Fig.5. The-object of the. rods J is to hold the shuttle upon its carrier, which t ey do by alternately entering holes8 8 made through the shuttle. The shuttleG'is guided in its reciprocating movements by means of a flanged raceway, l, which is concentric to the axis of the shaft E, and which extends below the bottom surface of the-cloth-plate A. The

shuttle-G presents a convex surface to the vertical surface of the flange 1, and is held in contact therewith by means of a flange, g,

turned up from a shoulder, g, near the lower edge of the shuttle, as shown in Figs. 8 and 9.- The shoulder g is held up Ill contact-with the lower edge ofthe flanged racewayl by means of a spring 12,011 the carrier D.

Into the back er ge of the bracket A 'is inserted a vertical :presser-bar, S, which is held in place by a pin, a, working in a slot, q,

and through this el- (shown in Fig. 6,) and which is acted on b'y'a the bar S, I employ a'cam-shapcd lever, s,

will act on pins, and, after raising the bar, will place the pin which is aflixed thereto into a concavity at the upper end of slotq, in which position of the pin .9 the bar S will assume the position shown in Fig. 2-that is to say, the

which, when turned up, as in Figs. 1 and 2,

bar will be raised to its fullest extent, auditslower end will be thrown back, as represented in Fig. 2. v I The spring-bar S serves as the fulcrum upon which the pressersbar turns outward away from the needle and in the line of the feed while it is being raised. Thelo'wer end of the j bar S is bifurcated, and its prongs bent-so as to afl'ord bearings for two beveled and inclinedrollers, t t, the bevel peripheries of which are serrated for biting into the cloth, which, is fed beneath the needle a by the movements imparted to the serrated feeder k. The rollers t t, as just stated,-present serrated edges to the cloth, which edges are brought together or as closely together as possible behind theneedle, and the latter is arranged 'as closelyas possible to the centers of the rollers.

' Inclined presser-rcllers are not new with me;

but my arrangement of such rollers with re spect to the point where the needle enters the cloth I believe to be new; The advantage of such arrangement is that the pressure is upon the fabric each side of the stitch, and nearly it not quite upon it, while it is being drawn tight, which prevents the" rollers from loosening the stitches. The rollers, by coming togetherin front of the needle, tread upon or so nearl upon the last stitch formed that said stitch IS held from relaxing while the next stitch is being formed.

At the upper. end of the bracket A. is a ten-.

sion-plate, a, which has a pin, 8", extending down from it into the bracket A, into which pin a slot is made, which, by means of an open= ing through the bracket, admits of the reception of one end of a spring, V, the opposite end of which spring is adjustable by means of anut, v. The plate a is arranged directly over the slot in which the presser-bar S is placed, so that when this bar is fully raised its upper end will lift the free end of spring 1:.

When the presse -bar S is depressed the plate 8' and raise the .spring V will causehe plate 8 to bear with.

more or less pressure upon the' upper end of J the bracket A, regulated by the nut M, which acts to lift the rear end of the spring V. Y

The thread (indicated by a dotted line in Fig. 2) is carried from the spool S beneath the a pin, 0, thence upward through an eye pressure-plate a, and downward and around whichis made-through an arm, s, and finally through a loop, 0, to the .eye

, said plate, liberate-the tension on the thread,

of the needle, as

shown inFig. 2.

The arm rispivoted to the bracket aud held in place by a retainer, 1', which allows the perforated end of this arm to be raised and depressed.

By the arrangement ofthe pressure-plates on top of the bracketA and directly over the upper end of the presser-bar S, when the bar is fully raised, as shownin Fig. 1, it will lift the and allow thelatter to draw freely while removing the workand these results are eflected simultaneously-that-is, the tension ;on the thread is liberated at the same time that the presser-bar is raised from'the materialbeing I sewed. The material may then be removed without pulling on the thread,as the latter will run freely from the spool, the tension being removed. When the presser-foot is again 'dropped to its working position the tension is made in the shuttle-case, as shown in Fig. 13,

restored.

The shuttle-case G, Figs. 12, 13,14, and 15 may be made of any of the well-known forms, with a recess for containingthe bobbin G,

which latter is held in its bearings by. means of a spring,'3, the notched free end of which embraces one of the pivoted ends .of thebob bin, as shown in Figs. 13 and 14. Other equivalent means of applying the bobbin may be adopted. 1 On the top of the case G, I apply a spring tension-plate, 4, which is preferably made of the tapered form shown in Fig. 12,so.as to prevent the thread dragging on its edge as,

the shuttle plays backand forth in or on its raceway. This tension-plate 4 'is secured to the butt-end. of the shuttle-case by means of a screw, 5; and at 6 the point of the plate 4 is depressed and concealed in a notch or cell for the purpose of preventing the arrest of the thread by it as the shuttle passes through the,

loop of the thread. Inthreading the shuttle the thread is drawn laterally under the point of said'plate4. That portion of the plate 4 through which the screw 5 passes is not atv right angles to its horizontal portion, b"ut forms with it an acute angle. Consequently by tightening or loosening the screw 5 the pressure or tension on the thread can be nicely adjusted.

At -7 a pin is'fixed to the tension-plate 4,

which pin enters a hole made through the case G, as shown in Fig. 14, and prevents lateral displacement of plate 4, and also serves for. the thread to draw around while drawing the stitch tight.'

Into the upper thin edge of the case'G a notch, 8, is made, throug'lrwhieh the thread from the shuttle ispassed. It is in this notch 8 that the thread is held by the tension-plate 4, which covers it.

On the bottom of the case G, I' apply, by means of a pivot, 9, a tapered plate, 10, which is adjustable. about this pivot, and is held in place by frictional contact with the case G.

The point 12 of the plate l0 forms the point bottom of of the shuttle, and, of course, must run close to the needle, so as to take the loopsot' thread with certainty. This point 12 can be adjusted by turning saidplate on its pivot nearer to or farther from a needle, as may be required, and as this point wears away it can be easily set up, and its proper relation with respect tothe needle always maintained. If it is desired not to depend on frictional contact alone for holding, the point 12 in place, a set-screw or other suitable means may be employed for positively holding this plate. I

I'have represented and described in this patent a'flanged shuttle'and a movable pointed shuttle; but I do not here claim these shuttles specifically.

' Having described myinvention, whatlclaim as new, and desire to secure by Letters Patent,

1. The combinatioifiluf the driving-shaft B, rock-shaft E, having-the foot h, and also the arm B, wherein the shntt'B' has its bearing,

with the feed-actuating bar F, having the stud f, substantially as described.- a I 2. The yielding feed-actuating bar-.F andcombined with the feed device It and a feedadjns'ter, 5, substantially as described.

3. The combiuatioir'of the shuttle'G, having the holes 8 8, with rock-shaft E, provided with the foot h, having the arms 'h h, and the rods j j, which alternately en ter and leave the shut tle, substantially as described,

- 4. The lifting-cam IS, in combination with the presser-bar S, provided with the pin 8,

and the bracket A provided with. the slot q, and the. spring S, which serves as a fulcrum for the'presser-bar, whereby the one cam is enabled to move the pin in two directions sin! ultancouslyviz., both vertically and horizo nt'ally away from the needle-in line of the feed-substantially as described.

5. The combination,- wilh the presser-bar S, of a tension-plate, 8 its pin zit-depressing spring V, and mechanism for raising and depressiugsaid presser-bar, substantially as described. j p

6. The shnttle-caseG, provided with anotch, 8', in its side, combined with atension-plate, 4," and a screw, 5 whereby said tension-plate is secured at one end of said shuttle-case, said -tension-plate being provided at its outer end 'witha depressed point, 6, which is concealed in a cell. in the shuttle-case,-andoperating, in connection with the notch 8f, asset forth.

7. In a sewing machine, a tension device,

means for vibrating saidbar, as described,'.

in combination with a presser-bar and a device for raising the presser-bar, whereby the tension is relieved simultaneously with the the lifter is imparted to the tension device to raising; of the presser-foot from the material, relieve the tension simultaneously with the 10 substantially as andfnr the purpose set forth. raising ot'the presserbar, substantially as de- 8. In a sewing-machine, a tension device, scribed.

5 in combination with a presser-bar, a device THOMAS CRANE.

for lifting the presser-bar, and mechanism ar- Witnesses: ranged between the tension device and the 1 GEO. 0. SMITH,

presser-bar lifter, whereby the movement of L. S. KELLOGG.

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