US1552405A

US1552405A - Presser foot

Info

Publication number: US1552405A
Application number: US735860A
Authority: US
Inventors: Walter A Adams
Original assignee: Lewis Invisible Stitch Machine Co
Current assignee: Lewis Invisible Stitch Machine Co
Priority date: 1924-09-04
Filing date: 1924-09-04
Publication date: 1925-09-08
Anticipated expiration: 1942-09-08

Description

Sept. 8, 19?..5.- 1,552,405

W. A. ADAMS PREssER FooT Filed sept. 4, 1924 atroz mg Patented. Sept. 8, 1925.

UNITED STATES PATENT OFFICE.

WALTER A. ADAMS, 0I ROCHESTER, NEW VYORK, ASSIGNOB .T0 LEWIS 'INVISIBLE I STITCH IAGHINI COHPANY, OF ST. LOUIS, IISSOUBI, .L CORPORATION 0F DELA- A mesma goor.

Appunti mea september 4, 19u. semi n. nasse.

To all lwhom z't may concern.'

Be it known that WALTER A. ADAMS, a citizen of the United States, residing at Rochester, in the county of Monroe and State of New York, has invented certain new and useful Improvements in Presser 'Feetg of which the following is a specification.

This invention relates to new and useful improvements in presser feet for sewing machines generally, although more particularly to presser feet for use in connection wit blind stitch sewing machines adapted for luse in felling operations, the preferable type of sewing mac ine being illustrated in the co-pending application of Charles W. Mueller for improvements in stitch formin mechanism, led February 14, Y1924, Seria No. 692,696.

In felling operations, such as for instance, on the bottoms of coats, trousers or the like, the super-imposed layer, that is, the fell is ver often previously bound by a binding whic is secured to the marginal edge portion by a line of through-andthrough stitches. In blind stitching the fell to the base fabric, it is desirable to position the needle thread, which connects the penetrant needle thread -loops, under the mar-4 ginal edge portion of the binding, whereby the latter will conceal said needle thread.

The principal object of my invention is, therefore, to rovide a presser foot with a device for liftmg the marginal edge portion of the binding whereby the needle of the blind stitch machine will penetrate the superimposed layer or fell at apoint directly adjacent the through-and-through stitches which secures the binding to said fell whereby the marginal edge portion of said binding will subsequently cover the needle thread lying between the needle thread loops forming the blind stitches.

Another object of the invention is to provide a presser foot with an edge guide arfell will be elevated suliiciently to rmit the'needle to pass through the fell and into and out ofthe upper face of the base layer pihout re-entering the edge portion of the Another object'of the invention is to provide anedge'guide for the purpose set forth which 1s adJustable to accommodate bindmgs of different-widths Without disturbing the relationship between the elevated edge portion of the fell and the needle of the sewing machine. l

A still further object of the invention is to provide a combined needle guide and edge-lifting device from a'single ieee of metal and supporting the same on t e presser fo'ot in such a manner as to insure the needle guide always being in proper position relative to the lifting device.

" With the above and other objects in view whichwill more readily appear as the nature of the vinvention is better understood, the same consists in the novel construction, combination and arrangement of parts hereinafter more fully described, illustrated and claimed.

In the accom anying drawings which show one form o my invention,

Figure 1 is a plan view of a presser foot showing the application of my invention,

Figure 2 is a similar view but without the fabric,

.Figure 3 is a bottom plan view of the presser foot,

Figure 4 is an enlarged detail sectional view taken on the line 4 4 of Figure 3,

Figure 5 is an enlarged detail sectional view taken on the line 5 5 of Figure 2,

Figure 6 isl an enlarged perspective view o f my combined needle guide and lifting dev1ce,

Figure 7 is a view showing in erspective the various partsv forming t e edge guide, and

Figure 8 is an enlarged sectional View on line 8 8 of Figure 1 sho-wing more or less diagrammatically, the relative positions of the parts.

Like reference numerals designate corresponding parts throughout the several figures of the drawings.

In the accompanying drawings the presser foot 5 includes a body portion 6 having attaching ears 7-7 integral therewith. Extending rearwardly from the front edge 8 of the presser foot is a centrally disposed fabric guiding slot 9, the inner portion thereof being angularly offset as atl() to provide an outlet for the edge portion of the fell. A feeding mechanism, not shown, feeds the work rearwardl as indicated vby the arrow in Figure 1, an consequently the line of feed is coincident with the major axis of the fabric guiding slot 9. This slot 9 forms resultant right and left ,forwardly extending arms 11 and 12 respectively. .In blind stitch machines for doing this class of work, the needle 13 oscillates about a horizontal axis located above the inner end portion 10 of the slot 9, the axis being disposed at an angle to the line of feed. Consequently, the needle oscillates ina vertical plane disposed at an angle to the lineof feed, this angle being shown in the drawings as at 45. It will however be understood that ,the needle may be oscillated at any other desired `angle relative to the line of feed.

In felling the bottoms of coats, trousers or the like, the edge portion of the fabric F is first covered by the binding o-r piping 15 which is secured to thefabric by a line of through-and-through stitches 16, and then this fabric is folded to form a resultant base layer 17 and a superimposed layer or fell 18.

layer or fell 18 tothe base layer 17 in such a manner that the needle will cause its penetrant needle thread loops to enter the superimposed layer or fell 18 under the marginal portion ofthe binding 15 and thence into and out of the upper face of the base layer 17. f In` this type of blind stitch machine, I preferably employ. a vertical oscillatory plunger 19 which is timed to make one .complete reciprocation for each oscillation of the needle, the high points of said plunger reciprocations being preferably raised and lowered alternately so as to alternately elevate the base layer into the path of the needle 13 during every other oscillation thereof. Bymeans of this plunger it will be observed that the base layer is engaged by the needle thread during every other oscillation of the needle. This avoids puckering of the base layer on the fair side thereof which would be the case if the needle engaged said base layer during each oscillation thereof.

In order to insure the needle entering the superimposed layer or fell 18 under the marginal edge portionof the binding 15 and adj acen1L the line of through-and-through stitches 16, I have provided a presser foot with an edge-lifting device 20 which in this instance is shown as having an integral shank 21, the latter being formed with a groove 22 '1in its upper face `forming a needle guide.

The shank 21 is seated in a groove formed in Y groove 22 which forms the needlel guide is coincidentwith the movements of the needle. The plunger 19 operates through the slot 9 of the presser foot and is located directly in rear of the needle guide 22. The -lifting device 20 is formed with an upwardly and rearwardly inclined guiding surface 24, thel upper end 25 thereof being disposed at a point adjacent the end of'and in a plane above the point of needle penetration, that is, above the plane of the groove 22.

v The fabric is fed through c hine as shown in Figures 1 and 8 of the drawings, theV fell`18 being disposed under theright hand arm 11 of thepresser foot and the marginal edge portion thereof including the binding 15 being bent upwardly into the groove 9 and thence downwardly through the offset `end 10 thereof andA finally passing under the presser foot.

The material is fedrearwardly and during its passage the edge-lifting device 20 is engaged by the marginal portion of the binding and elevated above the path of the needle whereby the point of the needle will the sewing ma-v.

enter the fell directly under said marginal portion of the binding and adjacent the line of through-and-through stitches 16.

In order to guide the marginal portion of the fell, that is, that portion including the binding 15, whereby the needle will penetrate the fell and thenceenter and emerge from the upper face of the base fabric without re-entering the fell, I have provided an edge guide which I have indicated as a whole by the reference numeral 26. This edge guide comprises a shelf 27 which extends parallel with the fabric guiding slot 9 and is disposed in spaced relation to the lifting device 2() so as to permit the `fell to pass upwardlytherebetween and be supported by said shelf. This shelf is provided with an overhanging lip 28 and a vertically disposed connecting wall 29, the latter serving to crowd the binding towards the lifting device 2() whereby the latter will with certainty elevate the marginal edge of the binding for the purpose previously described. The shelf is provided with a supporting shank 30 arranged at substantially 45 relative to the plane of the shelf. This shank 30 is provided with an elongated hole 31, the elongation being in the direction of its length and consequently parallel to the plane of the needle oscillation. An attaching screw 32 passes through a collar 33, thence through the opening 31 and has threaded engagement with the left arm 8 of the presser foot. By

means of the elongated hole 31, the guidema be adjusted to accommodate bindings ofv di erent widths without disturbingt its cooperative relation with the edge-li ing devlce 20, the movement of the edge guide during its adjustment being in a plane parallel to the plane of needle oscillation and consequently also in a-direction transverse tothe line of feed. In order `to further retain the upturned fell in proper working position, I have rovided a second edge guide 34 which is disposed below the edge guide 26 and is secured through a slot 35 to the presser foot by the same screw 32.

Thus the second guide 34 may be adjusted relative to the lifting device to provide Aa slot therebetween to freely receive a fell of a given thickness, and the edge guide 26 may be adjusted independently of said second 20 guide 34 to accommodate bindings of diferent widths, the operative edge o the guide 34 engaging the -fell adjacent the binding thereof.

It is of course to be understood that the details of structure. and arrangement of parts may be variously changed and modied without departing from the spirit and scope of my invention. y f

I claim:

l. In a presser foot for blind stitch felling machines, the combination of a body p0rtion having a rearwardly extending slot for guiding a previously bound fell, and

an edge liftingl device secured to said body portion andl disposed within the slot for raising the marginal portion of the binding of the fell.

2. In a presser foot for blind stitch felling machines, the combination of a body portion having a rearwardly extending slot for guiding a previously bound fell, andl an edge lifting device secured to said body portion and disposed within the slot for raising the marginal portion of the binding of the fell, said device having the upper fellengaging surface extending upwardly and rearwardly.

3. In a presser foot for blind stitch felling machines, the combination of a bod 'portion having a rearwardly extending s ot for guiding 'a previously bound fell, and an edge lifting device secured to said body portion and disposed within the slot for raising the marginal portion of the binding of the fell, said device having a .shank detachably secured to said kbody portion of the foot and formed with a needle guiding groove.

4. In a presser foot for blind stitch felling machines, the combination of a body portion having a rearwardly extending slot for guid- .ing a previously bound fell,'and an edge lifting device secured to said body portion and disposed within the slot for raising the marginal portion of the binding of the fell,

said device having a shank detachably secured to said body portion of the foot and formed with aA needle guiding groove, said device having its upperpfell-engaging surface extending upwardly and rearwardly from a point in advance of the needle guiding groove to a point adjacent the rear end of and in a plane above said roove.

5. In a presser foot for blind stitch felling machines, the combination of a body portion having a rearwardlyextending slot for guidin a previously bound fell, and an edge :li in device secured to said body portion and dlsposedrwithin the slot for raising the marginal portion of the binding of the fell, and an eye guide for the fell secured to the body portion and disposed. in spaced parallel relation to said lifting device.

' 6. In a blind stitch felling machine, the combination withy a presser foot having a rearwardlylextendingslot for guiding a previously bound fell, of avdevi'ce secured to the foot at `one side of the slot fory raising the marginal portion of the binding of the fell, a needle oscillating in a plane at an angle to the major axis of said slot for penetrating the fell underthe raised marginal portion of the binding, and an`edge guide for the fell secured to the presser foot at the other side of said slot.

7. In a blind stitch felling machine, the combination with a presser foot having a rearwardly extending slot for guidingI a previously bound fell, of a device secured to the foot at one side of the slot. for raising the marginal portion of the binding of the fell, a needle oscillating in a plane at an angle to the major' axis of said slot for penetrating the fell under the raised marginal portion of the binding, and an edge guide for the fell secured to the presser foot aty the other side of said slot, said guide being provided with a shelf for supporting the fell above the base layer for entrance by the needle.

8. In a blind stitch felling machine, the combination rwith a presser foot having a rearwardly extending slot for guiding a previously boundAfell, of a device secured to the foot at one side of the slot for raising the marginal portion of the binding of the fell, a 'needle oscillating in a lane at an angle to the major axis of said s ot for penetrating the fell under the raised marginal portion of-the binding, and an` edge guide for the fell secured to the presser foot at the other side of lsaid slot, said guide being mounted on the :foot for adjustments in a plane parallel to the plane of needle oscillation.

9. In a presser foot for blind stitch felling machines, the combination of a body portion having a rearwardly extendingslot for guiding a previouslylbound fell an edge- Il A 1,552,405

at one side of the slot for raising the marybinding and 'supported on said body orginal portion of the binding ofthe fell, an tion on the opposite side of the slot fiiom edge guide for the fell secured to the body said lifting-dence. 10 portion of the foot on the other side of the In testimony whereof I hereunto ax my l slot and adjustable towards and from said signature. y d' y liftin device, and a second guide for the fell or engaging the latteradjacent the u WALTER A. ADAMS.