US1247081A - Presser-foot for sewing-machines. - Google Patents

Description

0. CLARK PRESSEB FOOT FOR SEWINGv MACHINES APPLICATION FILED DEC. 1. 915v '2 SHEETS-SHEET 1.

Patented Nov. 20, 1.917;

N. D CLARK. PRESS ER FOOT FOR SEWING MACHINES.

APPLICATION FILED D750. I. 1915.

. 1,247,081; I Patented Nov. 20, 1917.

' 2 SHEETS-SHEET 2.

. U TED sra'rns PATENT omen."

NELSON D. CLARK, OF CHICAGO, ILLINOIS, ASSIGNOB TO UNION SPECIAL MACHINE COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

PRESSER-FOO'I FOR SEWING-MACHINES.

Patented Nov. 20, 1917,

Application filed December 1, 1915. Serial No. 64,419.

To all whom it may concern:

Beit known that 1, Nelson D. CLARK,-

I a citizen of the United States, residing at description,

-proved prcsser mechanism,

tion of the. and guided by theprcsser foot,

.foot sections one of which is yieldable and .between which islocated an intermediate section mounted so as'to engage the enchained thread loops for chaining off while the forward portions of thefabric sections are passing beneath the front ends of the spaced foot sections of the presser foot.

A further object of the invention is to provide'a presser foot of the above character wherein the outer sections extend in front of the intermediate section and are spaced to form a guiding slot through which the upturned edges of fabric sections may extend so that the same may be trimmed and the trimmed edges subsequently brought to abutting position beneath the intermediate section, and wherein the intermediate section' is mounted so that thesame may yield vertically and may tilt so as to engage the enchained thread loops for chaining off when fabric sections are entering beneath the forward end of the presser foot.

In the drawings, which show by way of illustration one embodiment of the invention:-

Figured is'a plan'view showing apart of the sewing machine having my improvement applied thereto;

.Fig. 2 is a front view showing my imfoot, parts of a trimming and the needles, and indicating in dotted lines the position of the work support;

Fig. 3 is a sectional view through the presser foot on a line passing through the front pair of needles and showing the posifabric sections which are held Fig. is, a side view of the presserfoot;

Fig. 5 is a plan view of the foot with the strip guide turned to one side;

foot; Fig; of Fig. 6;

Fig. 8 1s a perspective view of the presser foot with the strip guide turned to one side Fig. 9 is a perspective view of theinter- Fig. 6 is a bottom plan view of the presser.

7 is a sectional view on the line 7-7 i mediate section detached from the remainder of the foot; Fig. 10

mediate sectlon showing the needles and the.

work support and thetilting of the fooflsecis a side view of the intertion for holding the enchained thread loops while the fabric sections are entering beneath the front end of the foot sections; and

Fig. 11 is a sectional view on the line 11-41 of Fig. 9.

My improved presser foot consists of a shank portion lhaving a recess 2. formed therein adapted to receive the'presser bar, and a rearwardly pr0jecting arm 3 which is adapted to engage a guide bar. Secured to the supporting shank 1 is a foot section 4. This foot section 4 is rigid with the shank and projects forwardly in front of the shank and is provided with .an upturned toe '5. Also mounted on the shank 1 is a foot section 6 which is bodily movable vertically and is yieldingly connected to the shank. This foot sectionfi is carried by a supporting standard 7 which is mounted to slide be-' I 'tweenspaced lugs. 8 and 9 projecting laterthe shank and is held in place by late 10. The screws =1l--l1 pass through thecap plate into the lugs 8 and 9..

ally from a cap p said-.staj dard is provided with a slot 12 extending lengthwise thereof and' a limiting screw 13 passes through the cap plate, through said slot and into the shank of the foot. A spring the'standard and normally forces the foot section 6 downwardly. The screw 13 limits the downward movement of-the standard carrying the foot section 6. The foot section 6 is provided with an upturned-toe 15 which is located opposite the upturned toe 5 of the section 4. The foot sections 4' and 6 are spaced from each other, thus forming a.

16 at the forward a relatively narrow space end thereof and a relatively wide. space 17 into which said narrow space leads.

The wide space 17 is filled by an interme- 14 rests on the upper end of diate foot section 18 which, as herein shown, is formed with needle openings 19 and. 20. This intermediate foot section is pivotally connected to a supporting standard '21. Said standard 21 slides between the lugs 8 and9 and has a slot 22 through which the screw 13 extends to limit the vertical movements of said section. A spring 24 bears on the end of the standard 21 and normally forces the same downwardly. Said stand ard 21 has a block 25 formed integral therewith, which block is provided with-a recess to receive a lug 26 rigid with the foot section 18. A pivot pin or screw 27 passes through the block and through the lug, and pivotally connects the foot section 18 to the standard 21. This foot section 18 may move bodily vertically against the tension of the spring 24, and may tilt on its pivot 27.

The fopt section 1 is adapted to support a fixed trimmer blade 28, see Fig. 1, while the section '6 is formed with a recess 29 in which vibrates the movable blade 30 of the trimming mechanism. These blades are arranged so as to trim upturned edges guided through the narrow space 16 at the forward end of the presser foot and said upturned edges after being trimmed are aouttcd underneath the intermediate section 18 of the presser foot, clearly shown in Fig. 3. In thisfigure one of the fabric sections in indicated at F and'the other at F. The needle openings 19 and 20 are slightly staggered relative to each other and said intermediate section is also provided with stitch fingers extending into the openings. The opening '19 is adapted to receive a pair of needles n n, while the opening 20 receives a pair of needles n n. The narrow space 16 between the outside sections of the presser foot is so disposed that the meeting edges of the fabric sections F and F lie in a line parallel with the line of feed and passing between the inner needles 'n and n. The trimmed off strip is deflected away fromthe needles by a strip guide 31.

The work support is herein shown as tubular in outline, as indicated at W.

In the operation of my improved presser' foot, the two fabric sections are fed, as above noted, so that the upturned edges thereof pass between the outer sections and are trimmed. As shown in Fig. 3, one of said fabric sections is of double thickness and, therefore, the section 6 and the center section 18 yield upwardly to accommodate this extra thickness of the fabric. This permits a folded strip to have its edges trimmed and stitched to a single ply of fabric.

In Fig. 10 of the drawings, I have shown the fabric sections as they are initially fed to .the stitchingmechanism, the inner edge 7 having passed beyond the needles. This inner edge is in front of the pivotal point 27 of the intermediate section 18 and, c0nsequently, said intermediate section is tilted. The tilting of this intermediate section causes the rear end thereof to engage the enchained thread loops, indicated at 7', and cooperate with the feed to feed the enchained loops while the fabric sections to be stitched are passing underneath the front portion of the presser foot.

It is obvious that minor changes in the details of construction and the arrangement of parts may be made without departing from the spirit of the invention, as set forth in the appended claims.

Having tlaus described my invtntion, what I claim as new and desire to secure by Letters-Patent is 1. A presser foot for sewing machines, in-

- cluding in combination a shank, spaced foot sections carried thereby, one of said sections being bodily vertically yieldable without tilting relative to the other, an intermediate section located between said spaced foot sections and having a needle slot therein, means for mounting said intermediate section whereby the same will tilt to engage the enchained loops for chaining off when the fabric sections are entering beneath the slot therein, means for supporting said intermediate section whereby the same may tilt to engage the enchained loops for chaining ofi' when fabric sections are entering beneath the presser foot and the presser foot is raised thereby.

In testimony whereof, I afiix my signature, in the presence of two witnesses.

NELSON D. CLARK. Witnesses:

S. GEORGE TATE, A. F. BREDSHALL.

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