US1771546A - Sewing machine - Google Patents

Description

July 29, 1930. RMQREL' 1,771,546

SEWINGv MACHINE Filed July 20, 1926 2 Sheets-Sheet 1 July 29, 1930. MOREL 1,771,546

SEWING MACHINE Filed July 20, 1926 2 Sheets-Sheet 2 kid Patented July 29, 1930 UNITED STATES PATENT OFFICE FELIX MOREL, or rarnrras, PAR nAzAo-suR-Ursim, FRANCE, ASSIGNOR 'ro anoint} n'ranussnmnnrs a. CORNELY & cm. socrn'rn ANONYME), orranrs, FRANCE SEWING MACHINE Application filed July 20, 1926; Serial No.

My invention relates to'improvements "1n sewing machines and particularly to machines which are used for-embroidering.

One of the objects of the invention is to provide an arrangement for the vertical guiding of the reciprocating pivot iece in'orderthat during the sewing of em roidery and open work, the embroidery thread may more readily follow the designtraced upon the fabric.

Other objects of the invention will be obvious to those skilled in the art with reference to the accompanying drawing," in which- Fig.1 is an assembly view in elevation of my complete device;

Fig. 2is a horizontal section on an enlarged scale along the line 22 of Fig. 1; I Figs; 3 to 6 are detail views of the guiding elements of Figs. 1 and 2;

Fig. 7 is' a longitudinal sectional detail talaen through Fig. 1 on an enlarged scale; an I i Fig. 8 is a section along the line 88 of 26 Fig. 7.

Referring to the drawing, a claw foot Q which produces the displacement, of the fab ric to be sewed or embroidered, is carried by a presser-foot bar A, $0

The mechanism for operating the said bar A will now be described withreference to Figs. 1,7 and 8.

a A lever K is PIVOtd at O to a sleeve N fixedto a vertically disposed tube B. The

upper arm of lever K bears on a'cam suria'ce associated with a member L slidably mounted on needle-driving tube B and f stened to'a reciprocable support S by means of a collar R carried thereby. Said support is arranged 40 vertical direct-ionby any of the means well known in the art which has not been illustrated since it forms no part of the present invention.

It will be noted that when the member L descends, the upper arm of the lever K is pushed to the left as shown in Fig. 7. The lower arm of said lever, therefore, will be displaced toward the right. Said lower arm engages in a slot associated with a circular to be given an alternating movement in a;

123,758, and in France January 14, 1926.

member F having a central opening. Said member F is fixed to the bar A by means of. a collar]? rigidly .attached to.said bar.- It will thus be seen that displacement of the lower arm of lever K to the right during the descent of the member L will cause the mem} bers F, F and'consequently the bar AJtQ 'bemoved to the right-.- I

Movement of the lever' K is opposed by a spring so that when themember Lascends the said lever is returned to'its original posi tion and in so doing move's'the members F, F and consequently the bar- A'to-t he'left.

The sleeve N is guided by two of the sure faces in the opening in member F and p er'-' mits the vertical oscillating plane of the 1 elements carried by the needle-:driving'tube B to be orientated in all 1 directions but fwithout aifecting the horizontal reciprocatingmovement of the Presser-foot bar. The means for controlling the orientation, of themember N at will is so well known in theart that it has not been illustrated since it has no particular bearing on the present invention.

The horizontal movement of the bar A is combined with another movement in such a manner that the point of intersection of the longitudinal axis of the needle-driving tube B and the plane represented by the line 2-2 in Fig. 1 will be displaced vertically and given, a reciprocating movement. The vertical movement of this fictitious point is controlled'by a bearing D carried by a rib D which is adapted to be given a vertical recip rocating movement from the main shaft of the machine by any of the well known means in the, art and which has not. been illustrated.-

In devices, known in the art, the bearing corresponding. to the hearing Di, hereinbefore reierred to, receives a cylindrical projection,

forming part of a cross-bar and the presser-- foot bar corresponding to the bar A, hereinbefore referredto, is pivoted to said cross-- bar in "such gfashion that it can turn about the vertical air'is of saidcro'ss-bar. Obviously,

since the presser-foot'b'ar, during orientation,

must operate in a vertical plane other than that represented by the horizontal axis? of' said cross bar, it is essential that the said cross-bar turn about the said axis Now since i the plate -P of the machine,

' gludmg.

said cross-bar must, at the same time, be guided by the guide-tube corresponding to the needle driving tube B in the drawing, in such a way that its geometrical center will always coincide with the vertical axis of said tube, the cross-bar must be so formed that a certain latitude of movement will be present with respect to said tube.

By way'of example, the interior bore of said cross-bar is frequently given the form of a double-cone with acute salient angles. T is arrangement roduces very satisfactory operation but is su ject to the disadvantage that the acute salient angles thus formed wear rapidly which results in the cross-bar becoming no longer guided by the said tube which gives way to lateral displacement of cross-bar with respect to the tube.

Having thus outlined the usual guiding arrangement used in machines in current use, the guiding arrangement which forms the object of the present invention will now be described. The guiding is no longer produced by the needle-driving tube .B, which gave way to the disadvantages above outlined, but by a pair of vertical slots T and T associated with two fixed elements of the machine. In these slots are lodged and adapted to slide the shoes G carried by the heads e of the bolts E fastening the bar A to the cross-bar O. The bolts E, as shown in Fig. 3, are also provided with smooth cylindrical projections e which engage in corresponding smooth holes in cross-bar C. The shoes G have their outer faces of cylindrical form to permit oscillation about their transverse axes as shown in Figs. 5, and 6. Oscillation about the axis of the bolts E is assured by means of the projections e turning in the corresponding holes of member C. It will thus be noted that the presser-foot Q is rigidly maintained in parallel relation with the fabric which it advances, a condition which is absolutely necessary for producing regularity .of stitching.

.The slots T and T above mentioned are produced by providing a recess in the head which is usually of cast metal, and disposing therein liners H, H of tem ered steel' fastened by means of screws V, g and between which slides one Of the shoes G above mentioned. The other shoe G is adapted to slide in a plate M of tempered steel which is fastened to the cap of the head plate P by means of a screw W. It will be noticedthat the bore of member C is noticeably larger than the diameter of needle-drivin tul'geB which is solely for givmg suflicient reedom .to the tube and not for Many variations in my apparatus may be made by those skilled-in the art without departingfrom the scope of my invention, since Wheel claim is 1. In a sewing machine having a presserfoot, an operating bar therefor and a needle driving tube, means concentric with said tube for universally supporting said operating bar, said means comprising a pair of trunnions and a third trunnion extending at right angles to said first-mentioned trunnions, and means independent of said tube for guiding said supporting means in a vertical plane perpendicular with said third trunnion.

2. In' a sewing machine having a presserfoot, an operating bar therefor and a needledriving tube, the combination of a supporting plate concentric with said tube, a pair of arms on said bar, a pair oftrunnions on said arms plate, means on guiding said trunnions in a vertical direction and operating means for pivotally supporting said supporting plate.

In a sewing machine having a presserfoot, an operating bar therefor and a needledriving tube, the combination of a supporting plate concentric with said tube, a pair of arms on said ba a pair of trunnions on said arms pivotall engaging said supporting plate, means for gulding said trunnions in a vertical direction and a third trunnion extending at right angles to said first mentioned trunnions on said supporting plate, and operating means pivotally engaging said third trunnion for supporting said plate.

4. In a sewing machine having a presser foot, an operating bar therefor and a needledriving tube, the combination of a supporting plate concentric with said tube, a pair of arms on said bar, a pair of trunnions on said arms pivotally engaging said supporting plate, a pair of shoes mounted on said trunnions, a support for each of said shoes, and a guide slot in each of said supports, adapted to receive said shoes-respectively.

, 5. In a sewing machine having a pr'esserfoot, an operating bar therefor and a needle driving tube, the combination of asupporting plate concentric with said tube, a pair of arms on said bar, a pair of trunnions on said arms pivotally engaging said supporting plate, a pair ofshoes mounted on 'sald trunnions, a support for each of said shoes, :1 guide slot in each of said supports, adapted to receive said shoes respectively, a third trunnion extending at right angles to said firstmentioned trunnions on said supporting plate, means pivotally engaging said third pivotally engaging said supporting.

trunnion for sup orting said plate, said shoes having roun ed outer surfaces for permitting pivotal movement of said supporting plate about the axis of said third trunnion. Intestimo y whereof I have signed this specification;

FELIX MOREL.

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