US1209928A - Presser-foot for sewing-machines. - Google Patents

Description

R. BECKER. PRESSER FOOTFQR SEWING MACHINES.

APPLICATION FILED JAN-20,1915- Patented Dec. 26, 1916.

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RUDOLPH BECKER, OF ELIZABETH, NEW JERSEY, ASSIG-NOR TO THE SINGER MANU- FACTURING COMPANY, A. CORPORATION OF NEW JERSEY.

Specification of Letters Patent.

Patented Dec. 26, 1916.

Application filed January 20, 1915. Serial No. 3,218.

To all whom it may concern.-

Be it known that I, RUDOLPH BECKER, a citizen of the United States, residing at Elizabeth, in the county of Union and State of New Jersey have invented certain new and useful Improvements in Presser-Feet for Sewing-Machines, of which the following is a specification, reference being had therein to the accompanying drawings.

In stitching together overlapped marginal portions of relatively thick plies of superposed material, and particularly in uniting the overlapped plies of straw-braid in the production of hats, it is. desirable, in order to provide for properly controlling the advance of both plies and changes in the direction of feed, to adjust the angular relation of the work-engaging face of the soleportion of the presser-foot to the work-support and the operative face of the feed-dog so as to nip the work in an advantageous manner with relation to the stitching point, and it is the object of the present invention to provide a presser-foot which shall be so adjustable.

In its preferred form, the presser-foot is composed of a sole-portion resting upon the work and a shank constructed in separate parts having respectively convex and con cave bearing-seats with means whereby they are rigidly secured together adjustably both upon and crosswise of a radius of curvature of said seats, in order that the sole portion may be tilted both longitudinally and laterally in relation to its length and rigidly sustained in the desired position of adjustment.

Essentially, he improvement consists of the provision of means whereby the workengaging face of the sole-portion of the foot may be so secured upon the presser-bar as to permit of the desired adjustment.

The invention will be understood by reference to the accompanying drawings, in which Figure 1 is a perspective view of a por tion of a straw-braid sewing machine including the stitch-forming and feeding elements and the presser-foot. Fig. 2 is an elevation of the presser-foot, partly in section, upon a larger scale. Fig. 3 is a perspective view of one of the component parts of the presser-foot shank, and Fig. 4 a similar View of the pressure-plate or sole-port1on with another of the component parts of the shank integral therewith.

The frame of the machine is constructed with the usual bed 1 in which is mounted the actuating shaft carrying the rotary looper 2 cooperating with the needle 3 mounted in the reciprocating needle-bar 4. Upon the bed is secured the arched workplate 5 having the elongated needle aperture 6 and feed-dog aperture 7 to receive the serrated operative face of the feed-dog 8 mounted in the upright portion 9 of the feed-bar performing the usual lateral and ri'sing-and-falling movements.

The presser-bar 10 is formed at its lower end with the collar 11 against which is rigidly clamped by means of the screw 12, tapped into the lower end of the presserbar, the lateral flange 13 of the pressershank section or part 14, the flange 13 being provided with the slot 13 to receive the shank of the screw 12. The part 14 is formed on its outer face with the convex seat 15 of spherical form in the center of which is the threaded screw-aperture 16.

Fitted upon the seat 15 is the correspondingly curved concave seat 17 of a second section or part 18 of the presser-foot shank which is shown formed integral with the pressure-plate or sole-portion 19 provided with the needle-recess 20 in one side of its upturned toe portion 21 and having in practice a flat lower work-engaging face extending between the toe portion and the shank section 18 and with a channel in the bottom of the lateral extension thereof to receive the slide-plate carrying the braid-guiding velement 2.2. The usual means, including the shift-lever 23 and clamp-screw 24 are shown for setting the guide-member 22 in the desired position of adjustment.

The shank section 18 has disposed centrally of its spherical seat 17 the vertically elongated slot-E25 to receive the clampscrew 26 passing through the .same and entering the aperture 16 of the other section of the shank, a washer 27 having a concave inner face being interposed between the outer face of the shank-section 18 and the head of the clamp-screw. As will be observed, the shank-section 14 is rigidly connected with and is sustained in fixed relation to the presser-bar 10, and the shank-section 18 is disposed permanently in fixed relation with the sole-portion 19. By temporarily loosening the clamp-screw 26, the soleportion 19 may be tilted sidewise transversely of its length upon the screw 26 as an axis, or its forward end may be tilted upwardly or downwardly upon a radius of curvature of the superposed spherical seats 15 and 17 corresponding with the aXis of the screw 26, or both these adjustments may be made at the same time, the clamp-screw be ing re-tightened to rigidly secure the two parts of the shank in the desired relative adjustment and the sole-portion in its required relation with the upper face of the workplate 5 and the serrated work-engaging face of the feed-dog 7.

While for the purposes described it is requisite that the pressure-plate be sustained in fixed relation to the work-plate, it is evident that for certain classes of work the presser-foot may be constructed to accommodate itself to the surface of the work, which may be accomplished by replacing the Washer 27 with a spring-washer or by other means. In this case, the point of connection of the pressure-plate with that section of its two-part shank attached to the presser-bar would of course be advantageously positioned in relation to the operative face of the pressure-plate to permit the automatic accommodation of the presser-foot to the face of the work.

Having thus set forth the nature of the invention, what I claim herein is 1. A presser-foot for sewing machines comprising a sole-portion and a shank constructed in separate parts fitted together for tilting adjustment of the sole-portion both lengthwise and crosswise of its work-engaging face relatively to one of the component parts of the shank, and means for rigidly securing said parts together in adjusted operative position.

2. A presser-foot for sewing machines comprising a sole-portion and a shank portion constructed in separate parts formed respectively with convex and concave seats curved in two directions at right angles to each other thereby permitting universal adjustment of said sole-portion relative to said shank-portion, and means for rigidly securing said portions together in adjusted operative positions.

comprising a sole-portion and a shank constructed in separate parts formed respectively with convex and concave seats and adjustable both upon and crosswise of a radius of curvature of said seats, one of said parts being formed with an elongated slot disposed transversely to the work-engaging face of the sole-portion, and a clamp-screw passing through said slot in one part and tapped into. the other part of said shank for rigidly securing them in different positions of relative adjustment.

4. In a sewing machine, the combination with a work-plate and a presser-bar, of a presser-foot comprising a sole-portion and a shank portion rigidly connected therewith and provided with means whereby said soleportion may be tilted both longitudinally and laterally with respect to its length and with means for adjustably and rigidly securing it in different operative positions of angular adjustment relative to the work- 7 plate.

5. In a sewing machine, the combination with a work plate and a presser-bar, of a presser-foot comprising a'sole-portion and a shank constructed in separate parts of which one is formed integral with the soleportion, said parts being provided respectively with convex and concave seats and adjustable both upon and crosswise of a radius of curvature of said seats, means. for; rigidly securing them together, and means. for securing the second of said parts rigidly upon the presser-bar.

6. In a sewing machine, the combination with a work-plate comprising a sole portion and a shank constructed in separate parts of which one is formed integral with the sole portion, said parts being provided respectively with convex and concave seats fitted together and relatively movable both upon and crosswise of a radius of curvature of said seats, means for securing together said parts of the presser-foot shank, and means for securing one of said parts rigidly upon the presser-bar.

In testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

' RUDOLPH BECKER.

Witnesses:

HENRY J. MILLER, HENRY A. KORNEMANN, Jr-

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. I

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