US2136781A - Open stitch sewing machine - Google Patents

Description

OPEN STITCH SEWING MACHINE Filed Aug. 15, 1957 INVENTOR. JACOB BRUSSELL ATTORNEY.

Patented Na. 15, 1938 UNITED STATE 5; PATENT emce- Jacob Brussell, New York, N; assignor tort,

Isadore Friedman, Roselle, N. J. I

Application August 13, 1937, SerialNo. 1"58,86 9 7 '12 Claims. (01.112-179) open stitch, moreoften termed a ladder stitch or faggoting.

It is highly desirable inm any cases for decorative and other purposes to sew two or more pieces of fabric together with an open stitch;

Thisin the past has been accomplished by hand,

which is a. very slow process, or by machines which were capable of forming such stitches but the mechanism thereof was complicated. and delicate or slowed down the operation of the machine to such an extent that it could not be used in commercial large scale production.

The .present invention isintended and adapted to overcome the disadvantages and difficulties heretofore encountered in machines of this type and to provide a simple mechanism which is easily heldin place, which may be adjusted for different widths of stitches to be made, whichis readily removable, and which is strong and sturdy. t

In practicing the present invention, I provide a sewing machine with the usual stitch-forming mechanism, but substitute in placeof the ordinary single needle plate a multiple needle plate having the parts thereof in vertically, superposed, parallel relationship. I also provide a corresponding number of feed dogs and presser feet similarly arranged. In one of the needle plates and one of the presser feet there is a slot extending from the needle opening to the rear, whereby the pieces of fabric after having been sewed may be freely fed through the machine without interference by reason of the stitches.

In the accompanyingdrawing, constituting a part hereof, and in which like reference characters indicate like parts? Fig. 1 is a longitudinal sectional view through the stitch-forming mechanism of a. sewing mainvention.

The usual sewingmachine comprising a bed I I, having a hook 2 beneath the same suitably operated, is provided with the usual head 3 having a needle bar 4 and a presser foot bar'5 arranged for operation as usual.

Two needle plates 6 and l in superposed relation and substantially parallel to each other are joined together by means of an upstanding portion& secured toforintegral with needleplate 6. One or more screws .i'pass ingth-rough an edge of needle plate 1 holdsth'e same on top of portion 8. In order tof adjust the distance between plates 6 and I, shims of plates of predetermined size may be" interposed'between needle plate I and portion fl. I l L Adjacent to portion 8, a slot I0 is provided in needle plate '6 and a corresponding slot H di reotly above the same is provided inneedle plate 1. To hold thejfeed dog arrangeme'nathere is provided a base l2 mounted as usual, having a link l3 pivotedthereto, the free end of said link being securedto rockshaft l4 driven in the ordinary manner, The lower feed dog 15 of the feed dogarrangement is suitably secured to base I2. At the side thereof, adjacent to portion 8, there is fittedto ,said-feed'dog [5 or integrally formed therewithfan upstanding portion is which passes through slot lll. A second feed dog ll in superposed relation"; to feed dog 95 and parallel theretohas a side extension'fitted onto the top of portionflfibyone or more screws It. .In orderft oadjust the distance between the feed dogs [5 and I1, shims or plates may be interposed betweenpor'tion l6 and feed dog ll. Suitable openingsare provided in needle plates 6 and? to allow functioning of the feed dog l5 and II, respectively. 1 i V A series of needle openings l9 are provided in the several partsto 9411OWl3h8 passage of' the needle 20 therethrough. 9

There is further provided a pair of presser feet 2! and 22 alsoin superposed, parallel relationship, the lower presser foot 2i being interposed between platest and I and the upper presser foot beingabove plate I. They are bound together by upstanding portion 23 terminating in aflattenedplate 24, whereby thepresser foot arrangementmaybe secured tobar 5 by screw 25. The lower presser foot 2| is provided with a slot starting at needle opening 26 and terminating at 21 at the rearof said presser foot.

' Similarly, the upper needle plate I is provided with a slot which starts atneedle opening l9 and extends rearwardly to 21' at the rear of said needle plate. I

In Fig. 3Ihave shown a slight modification of the presser'foot arrangement which allows of adjustability of the distance between presser feet 2| and 22. In thisymodificationthe upper presser foot 221s provided with an upstanding portion 28 at one'side thereof. Vertical slots 29 therein are adapted to receive screws 30 which pass through said slots and into portion 23 of the presser foot arrangement. By suitable manipulation of the screws 30, the relative positions of presser feet 2| and 22 may be adjusted.

In the operation of the machine, when two pieces of fabric are to be joined by a ladder stitch, a piece of fabric is placed on each of the needle plates 6 and l, the presser feet 2| and 22 are lowered in position, and the machine is operated. The cooperation of the needle 20 and hook 2 causes a line of stitching to be made with a separation between the fabrics equal to the distance between plates 6 and I; By reason of the slots 21 and 21, the rearward movement of the fabric by the feed dogs is not interfered with and the sewed fabric freely passes out of the mechanism. The resulting product is shown in Fig. 4. The pieces of fabric 3| and 32 are provided with in-turned portions or hems 33 with a series of stitches 35 in parallel spaced relationship with the pieces of fabric spaced a desired distance apart. To some extent, the spacing may be changed by regulating the tension of the thread during the sewing. By increasing the tension, the pieces of fabric are brought closer together by reason of the tightening of the stitch, and by decreasing the tension of the thread there is less tightening of the stitch and the pieces of fabric are not drawn so closely together. If a considerable change in the spacing between the fabrics is desired, then the device itself may be adjusted. For instance, the presser feet may be adjusted as described in connection with Fig. 3 and the needle plates andfeed dogs may be adjusted by the introduction or removal of shims, as described above.

Although I have described my invention setting forth several embodiments thereof, it will be noted that variations may be made therein without departing from the principles herein set forth. For instance, the invention is not confined to the sewing of two pieces of fabric together with a ladder stitch, but a greater number may be sewed together by the provision of additional needle plates and the like. The means for adjusting the distance between the pairs of elements may be quite different from those described and if desired, the several pairs of elements may be permanently secured together or may be integrally formed. These and other changes in the details of construction may be made within the spirit of the invention, the. scope of which is defined in the claims appended hereto. v

What I claim is:

1. In a sewing machine, stitch forming mechanism, a plurality of needle plates in superposed relation having needle openingstherein, a corresponding number of superposed feed dogs, openings in said plates for the reception of said dogs and means for simultaneously operating the same, a corresponding number of superposed presser feet having needle openings therein and means for simultaneously operating the same.

2. In a sewing machine, stitch forming mechanism, a plurality of needle plates in superposed relation having needle openings therein, a corresponding number of superposed feed dogs,

openings in said plates for the reception of said dogs and means for simultaneously operating the same, a corresponding number of superposed presser feet having needle openings therein and means for simultaneously operating the same, one of said needle plates and .one of said presser feet having a slot extending from the needle opening to the rear end thereof.

3. In a sewing machine, stitch forming mechanism, a plurality of needle plates in superposed relation having needle openings therein, a corresponding number of superposed feed dogs, openings in said plates for the reception of said dogs and means for simultaneously operating the same, a corresponding number of superposed presser feet having needle openings therein and means for simultaneously operating the same, the upper needle plate and the lower presser foot having a slot extending from the needle opening to the rear end thereof.

4. In a sewing machine, stitch forming mechanism, a plurality of needle plates in superposed relation having needle openings therein, a corresponding number of superposed feed dogs, openings in said plates for the reception of said dogs and means for simultaneously operating the same, a corresponding number of superposed presser feet having needle openings therein and means for simultaneously operating the same, said feed dogs and presser feet being respectively secured together.

5. In a sewing machine, stitch forming mechanism, a plurality of needle plates in superposed relation having needle openings therein, a corresponding number of superposed feed dogs, openings in said plates for the reception of said dogs and means for simultaneously operating the same, a corresponding number of superposed presser feet having needle openings therein and means for simultaneously operating the same, said feed dogs being secured together along one side and said presser feet being secured together along the opposite side.

6. In a sewing machine, stitch forming mechanism, a plurality of needle plates in superposed relation having needle openings therein, a corresponding number of superposed feed dogs, openings in said plates for the reception of said dogs and means for simultaneously operating the same, .a corresponding number of superposed presser feet having needle openings therein and means for simultaneously operating the same,

the distance between said plates being suificient to allow raising and lowering of said presser feet.

7. In a sewing machine, stitch forming mechanism, a plurality of needle plates in superposed relation having needle openings therein, a corresponding number of superposed feed dogs, openings in said plates for the reception of said dogs and means for simultaneously operating the same, a corresponding number of superposed presser feet having needle openings therein and means for simultaneously operating the same, said feed dogs and needle plates being respectively secured together along one side and said presser feet being secured together along the opposite side.

8. In a sewing machine, stitch forming mecha nism, a plurality of needle plates in superposed relation having needle openings therein, a corresponding number of superposed feed dogs, openings in said plates for the reception of said dogs and means for simultaneously operating the same, a corresponding number of superposed presser feet having needle openings therein and means for simultaneously operating the same, said feed dogs being secured together along one side and an opening in at least one of said plates to allow passage of said securing means.

9. In a sewing machine, stitch forming mechanism, a plurality of needle plates in superposed relation having needle openings therein, a corresponding number of superposed feed dogs, openings in said plates for the reception of said dogs and means for simultaneously operating the same, a corresponding number of superposed presser feet having needle openings therein and means for simultaneously operating the same, and means for adjusting the distance between the said feed dogs, presser feet and needle plates respectively.

10. In a sewing machine, stitch forming mechanism, a plurality of needle plates in superposed relation having needle openings therein, a corresponding number of superposed presser feet having needle openings therein, and means for feeding fabric over said needle plates.

11. In a sewing machine, stitch forming mechanism, a plurality of needle plates in superposed relation having needle openings therein, a corresponding number of superposed presser feet having needle openings therein, and means for feeding fabric over said needle plates, one of said needle plates and one of said presser feet having a slot extending from the needle opening to the rear thereof.

12. In a sewing machine, stitch forming mechanism, a plurality of needle plates in superposed relation having needle openings therein, a corresponding number of superposed presser feet having needle openings therein, said presser feet being secured together, and means for feeding fabric over said needle plates.

JACOB BRUSSELL.

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