US725929A - Presser-foot for sewing-machines. - Google Patents

Description

No. 725,929 PATENTED APR 21, 1903..

D. L. CHANDLER. DRESSER FOOT FOR SEWING MACHINES.

APPLICATION FILED JAN. 24, 1902.

N0 MODEL.

WIT'N E 5555.-

UNrra States ATENT Triton.

DANIEL L. CHANDLER, OF AYER, MASSACHUSETTS, ASSIGNOR TO GEORGE J. BURNS, OF AYER, MASSACHUSETTS.

PRESSER-FOOT FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 725,929, dated April 21, 1903.

Application filed January 24, 1902. Serial No. 91,091. No model-3 I To whom, it may concern: to receive the presser 7. A fiat spring 9, at- Beitknown thatLDANIELL.OHANDLER,0f tached by a screw 10 to the presser-foot, Ayer, in the county of Middlesex and State of yieldingly depresses the free rear end of the Massachusettahaveinventedcertain'new and presser 7 into coaction with the work- plate 1, 5 5 useful Improvements in Sewing-Machines, of and a pair of projections 11 11 on the presser which the following is a specification. act as stops, in conjunction with the upper This invention relates to sewing-machines; surface of the presser-foot, to limit the and it consists in certain improvements amount of depression of said free'end. The therein, whichIshall now proceed to describe spring 9 also by overlying the hinge-line of 60 and claim. the presser 7 retains the trunnions of the Of the accompanying drawings, Figure 1 latter in their open bearings. represents a vertical sectional view of sew- It will be noted that the needle-passage 5 is ing-machine plaiter parts constructed in acformed partly in the presser-foot 3 and partly cordance with myinvention. Fig.2r'epresents in the secondary presser 7. The free end of 65 aplan view of the presser-foot. Fig. 3 reprethe latter bears on the fabric on both sides of sents a section on the line 3 3 of Fig. 1 with the line of stitching in immediate proximity the plaiting-blades omitted. Fig. & repreto the needle-path and can move vertically sents a detail perspective view of the secondvWithin limits independently of the vertical ary presser. Fig. 5 represents a perspective movement of the main presser-foot. 7o view showing an example of the character of In Fig. 5, 12 represents a piece of ruching, work upon which the machine is designed to having groups of knife-plaits 13 13 formed in operate. it, each group consisting of a plurality of The same reference characters indicate the plaits formed in one direction and a pluralsame parts in all the figures. ity of succeeding plaits formed in the oppo- 25 My invention, of which a preferred embodisite direction, the plaits being secured by a ment is illustrated in the drawings, consists, longitudinal line of stitching 14:. In making generally speaking, in a mechanism for pressruchin g of this or similar character with maing on the fabric in the immediate vicinity chines as constructed prior to my invention of the needle in the manner more fully hereit is found that the first-formed plaits of a o inafter specified by means movable indegroup will so raise the presser-foot of the mapendently of the movement of the main chine that'the fabric following them will not presser-foot. be pressed firmly against the work-plate.

lrepresents the work-plate, through which Therefore when the needle retreats after operates a feeder composed of'a row or series piercing the goods it draws the goods up with of toothed bars 2 2, acting through slots in it, which in turn pulls up the thread and prethe work-plate. vents the loop from being properly formed.

3 represents the yielding presser-foot co- The hook or under part of the stitching mechacting in the ordinary manner with the feeder anism therefore often fails to act properly, and work-plate. which results in the formation of an imperfect 40 4 represents the needle, operating through or unlocked stitch. \Vith my improvement,

a needle-passage 5 in the presser mechanism, however, the auxiliary presser 7, because of its and 6 6 represent plaiting-blades acting to independent movement and the location of its form plaits in the fabric, which are subjectfree end in advance of the rear portion of the ed to pressure between the presser mechanmain presser-foot, remains with its said free ism and the work-plate,'are stitched by the end depressed below the main presser-foot stitching mechanism, and are fed forward by when thelatter is elevated by abunch of plaits the feeder. under its rear portion, and accordingly holds 7 is a secondary presser formed with trunthe fabric in the immediate vicinity of the nions or pivots 8 S, jour-naled in open-bearing needle under firm pressure at all times. It o depressions in the presser-foot 3, in which is essential to this action that the auxiliary latter is cut a rectangular aperture adapted presser shall not extend for any substantial distance in the rear of the lateral plane through the needle, for in that case the bunch of plaits in the rear of the needle which lifts the presser-foot would also lift the auxiliary presser to substantially the same level. It is, furthermore, highly desirable to the proper working of the invention that the auxiliary presser should be of narrow width compared to the presser-foot, for then the auxiliary presser causes but little drag on the goods and is not raised by thick portions or irregularities which may exist in the margins of the goods.

It is obvious that this improvement is 1 equally eifective for various other classes of goods having an irregular or seamed formal tion, in which hold the the goods.

In sewingmachines as ordinarily constructed the stitching and work-feeding parts 1 form a combination in which the presser-foot performs the dual function of holding the Work against the feeder when the latter acts r and of holding the Work against the workplate when the stitch is being formed. Thisv combination I have changed by dividing up the feeding and work-holding functions of the 1 pressing means and assigning them to independently-movable elements. In sewing-machine plaiters as formerly constructed there is a further combination between the workplate, the presser-foot, the stitch -forming' mechanism, and the plaiting or folding mechanism which I have altered by dividing up the functions of the work-pressing means between two independently-movable elements, one of which acts to hold the formed plaits under pressure, while the other acts independently to hold the goods in the vicinity of the needle under pressure whilethe plaits are being stitched.

claim 1. In a sewing-machine the combination with the main yielding presser, work-plate, feeder, needle, and plaiterblade operating between said main presser and work-plate, of an auxiliary yielding presser of small width compared to that of the main presser and pivoted thereto forward of the lateral plane through the needle, its rear end terminating substantially at said plane.

2. A presser device for sewing-machines comprising a main presser formed on its up per sidewith open trunnion-bearings and with i an aperture between said bearings, an auxiliary presser occupying said aperture and having trunnions mounted in said bearings, means to limit the downward movement of the free end of said auxiliary presser with respect to the main presser, and a spring attached to the main presser and extending over the hinge-line of the auxiliary presser to a bearing on the latter, whereby the auxiliary presser is retained in its bearings and its free end yielding-1y depressed.

In testimony whereof I have affixed my signature in presence of two witnesses.

DANIEL L. CHANDLER. Witnesses:

THOMAS L. HAZEN,

P. H. HOOLEY.

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