US2159252A - Multiple needle sewing machine - Google Patents

Description

y 1939- J. BRUSSELL 2,159,252

MULTIPLE NEEDLE SEWING MACHINE Original Filed July 2, 1935 2 Sheets-Sheet 1 (:OQOOOP" I 30000000 I! @00 wooooo) Q Z3 1] 14 v25 1 h i-i*i- INVENTOR JQQOb Brussell ATTORNE May 23, 1939. .1. BRUSSELL MULTIPLE NEEDLE SEWING MACHINE Original Filed July 2, 1935 2 Sheets-Sheet 2 eng- INVENTOR Jacob B uss l/ Patented May 23, 1939 UNITED STATES MULTIPLE NEEDLE SEWING MACHINE Jacob Brussell, New York, N. Y., assignor to Isadore Friedman, Roselle, N. J.

Substituted for abandoned application Serial No.

29,455, July 2, 1935.

This application July 7,

1937, Serial No. 152,401

Claims.

The present invention is directed to sewing machines, and in more detail to a multiple needle machine, which may be adapted for sewing or shirring, and to the construction of an improved type of shirring machine capable of utilizing many more needles than have been provided in prior machines.

Although it is highly desirable to have the lines of stitching in shirring as close together as pos- 10 sible, the minimum space between the same has been approximately of an inch due to the limitations of the mechanism which advances the cloth. The feed dog was constructed in the form of a fork with prongs extending in the slots of the throat plate. These prongs were cantilevered, and so had to be of considerable thickness to provide necessary strength. As there must be one such prong as well as a part of the throat between adjacent needles, the needles were spaced a considerable distance apart.

' To convert a shirring machine into a sewing machine, the presser-foot used for shirring was removed and a plain presser-foot suitable for sewing was inserted in its place. This caused inconvenience and requires two separate presserfeet. It is an object of my invention to provide a presser-foot which, with a slight change, may be usedfor either shirring or sewing and which change may be made without the removal of the presser-foot from the machine. I accomplish this by constructing the presser-foot with a por tion which is removable by simply loosening a pair of screws.

Because of the increased length of the presserfoot to provide for the extra number of needles and give the wider shirring, I provide the presserfoot with vertical members which extend through guides provided in the needle bar. To strengthen the needle bar in order to carry a larger number of needles, I provide a reinforcing strip on the back of the needle bar in such a manner that a space therebetween constitutes a guide for the said vertical members.

The cloth is held tightly during the sewing .;5 process and cannot be readily removed at the end of the sewing by simply raising the presserfoot, lifting the needles and then pulling the cloth out, as the tension is so great and the cloth is so firmly held that the needles may break off.

5.0 It is a further object of my invention to provide means for loosening the threads near the needles so that the cloth may be removed in the normal manner without pulling each thread individually to secure the necessary slack.

55 For shirring to take place in a machine, the

back part of the presser-foot must be cut away so that when the needle descends, the taut thread pulls the goods forward and the stitch holds the caught up part pulled forward. The amount of goods caught up depends on the tightness of the thread and the distance between the needle and the cut-out part of the presser-foot. The presser-feet of the prior art shirring machines were so constructed that the amount of shirring could not be varied as the distance between the needle and the cut-out part of the presser-foot could not be regulated or adjusted.

It is a still further object of my invention to provide a presser-foot which is adjustable forward and backwards with respect to the needles so that the distance between the needles and the cut-out part of the presser-foot may be varied to provide a shirring presser-foot which will give a variable amount of shirring. I accomplish this object by constructing the presserfoot in two parts, one attached to the presser foot bar and the other, the foot part, to the lower end of the first part by an adjustable connection.

All of these various objects hereinabove detailed, together with other features such as strength, easy changing from a shirring to a sewing machine and smoother acting are also objects of my invention.

For a more detailed study of the invention,

reference is hereby made to the following description and. the accompanying drawings, in which Fig. 1 is a side view of my sewing and shirring machine;

Fig. 2 is a view of the under part of the machine looking upward and showing the driving mechanism;

Fig. 3 is a fragmentary front view detail showing the upper part of the head of the machine and the thread loosening attachment;

Fig, 4 is a section along the line 44 of Fig. 1 showing the machine adjusted for shirring-and with the needle raised;

Fig. 5 is an elevational view showing the presser-foot with the sewing part added;

Fig. 6 is a plan view showing the needle bar; and

Fig. 7 is a perspective view of part of the feed dog.

In the machine shown, a bed I is provided having a standard 2 carrying the arm 3 and head 4. Extending downward from the head is the needle bar 5.

Under the bed I there are provided shafts 6 and I which oscillate and which carry the feed dog mechanism 8. The hook shaft 9 carries the hooks II] and is located between the shafts 6 and I and below the feed dog. The movement of the shaft 9 is synchronized with the vertical motion of the needle bar 5 so that when the latter is at the lowest position, the hooks catch the thread loops in order to provide a loop for the next stitch. In addition, the shafts 6 and TI are also synchronized so that the feed dog 8 may function with the presser-foot II on the bar I2 extending downward from the head of the machine and connected to its driving mechanism to advance the material I3a which is being sewed or shirred, as the case may be, in time with the needle action.

The bar 5 is provided at its lower end with the laterally extending arm I3 which carries the battery of needles I4. The back of the needle bar is reinforced by member I5 which extends along the full length of the needle bar at its rear, and is joined to arm I3 at its ends and center. Recesses therein provide slots I6 between the joined parts. In this way, the arm I3 is strengthened and stiffened.

The presser-foot I I is joined to bar I2 by pin I I so as to permit the presser-foot to tilt laterally and pass and hold varying thicknesses of cloth and has a rear cut-out portion I8. A part I9, the counterpart of cut-out part I8, is provided so that when desired the part I 9 may be held by screws 20 in position in space I8. When the part I9 is in position, the machine is a sewing machine, and when the part I9 is removed, the machine becomes a shirring machine.

In operation as a shirring machine, the needle descending with the thread already taut pulls the cloth forward into the space I8 in the back of the presser-foot and the knot of the thread in the new stitch holds the cloth so pulled. The amount of shirring therefore depends partly on the distance between the needle and the space I8, and the less this distance, the more'shirring takes place. Heretofore, this distance has been a constant one for a given presser-foot, but in the pressent invention, the lower portion II of the presser-foot is joined to the upper portion Ila by screws 2| which permit the presser-foot to be adjusted forward or backward varying the amount of shirring. In order that the needles may project through the presser-foot, elongated slots 22 are provided in the presser-foot.

The feed dog comprises a frame 23 with parallel feed bars 24 integral therewith and extending from the front to the rear. Said bars project upward above the frame so that when the feed-dog is in position below the throat plate 25, the tops of the extending bars are above the surface of the throat plate passing through slots 26 of the throat plate. As bars 24 are rigidly supported at both ends giving additional strength thereto, they may be made narrower than heretofore, and more needles may be used, thus giving'a finer gauge product. The upper surfaces of bars 24 are provided with teeth 21 so as to grip and advance the cloth [3a. The under part 28 of the feed dog is arched laterally from the front to the rear in order to provide room for the hooks I9.

To level the feed dog on the support 29, a screw 30- is provided at the under part of the frame of the feeddog near each of its corners. Said screws pass through support 29 and are threaded into frame 23, whereby the adjustment thereof levels the. frame. After the frame is adjusted, screws 3I passing through frame 23 into support 29 are tightened to lock the frame in position. As the feed dog frame is supported at each end instead of in the center as formerly, it may now be made of any length and can stand increased stresses. The support 29 is carried by the shafts 6 and I (Fig. 4) which impart to it the necessary motion to cause the feed dog to co-act with the presserfoot and advance the cloth.

The upper part I la of the presser-foot has upwardly extending fiat guides 32 attached by the screws 33 and extending into the slots I6 in the back of the needle bar, to guide the presser-foot so that it remains parallel to the needle arm I3. Throat plate 25 is provided with the openings (not shown) for the needles to pass through and coact with the hooks.

To provide a thread pulling means so that the cloth may be readily removed after the sewing is finished, the head 4 is provided with the socket 40 to carry the pivoted member II bent at 42 and forming a rod 43 which is interposed between the threads and the head. When the rod is oscillated, it describes an are forward and downward and pulls the threads forward, producing the desired slack necessary for the removal of the cloth. The spring 44 attached to rod 43 provides retracting means therefor when not in use.

I have above described certain improvements in shirring and sewing machines and since many modifications and changes may be-made in the 30 same without departing from the spirit and scope of the ideas conveyed in the specific description, I desire to cover all modifications, forms and embodiments of the ideas coming within the language and scope of the appended claims. This application is a substitute for my prior application Serial No. 29,455, filed July 2, 1935.

What I claim is:

1. In a sewing machine, a needle bar having a needle arm of relatively great width adapted to hold a plurality of needles therein, a presser-foot of corresponding width, said arm and foot having at least one set of cooperating extensions and recesses located laterally of said needle bar, whereby a parallel relationship between said arm and foot is maintained.

2. In a sewing' machine, a needle bar having a needle arm of relatively great width adapted to hold a plurality of needles therein, a presser-foot of corresponding width, said foot being mounted for forward and backward adjustment relative to said needles, said arm and foot having at least one set of cooperating extensions and recesses located laterally of said needle bar, whereby a parallel relationship between said arm and foot is maintained.

3. In a sewing machine, a needle bar having a needle arm of relatively great width adapted to hold a plurality of needles therein, a presser-foot of corresponding width, said arm and foot being held in the head of said sewing machine at approximately their central portions, said arm and foot having at least one set of cooperating extensions and recesses located laterally of, said needle bar, whereby a parallel relationship between said arm and foot is maintained.

. 4. In a sewing machine, a needle bar having a needle arm of relatively great width adapted tohold a plurality of needles therein, a presserfoot of corresponding width, said arm and foot having at least one set of cooperating extensions and recesses located laterally of said needle bar including an extension at each side of said foot and corresponding recesses in said arm allowing relative vertical movement of said arm and'foot,

whereby a parallel relationship between said arm and foot is maintained.

5. In a sewing machine, a needle bar having a needle arm of relatively great width adapted to hold a plurality of needles therein, a presser foot of corresponding width, said arm and foot having at least one set of cooperating extensions and recesses located laterally of said needle bar including vertical flat guides extending upwardly at each side of said foot and corresponding slots in said arm allowing relative vertical movement of said arm and foot, whereby a parallel relationship between said arm and foot is maintained.

6. In a sewing machine, a needle bar having a needle arm of relatively great width adapted to hold a plurality of needles therein, a presser-foot of corresponding width, said arm and foot having at least one set of cooperating extensions and recesses located laterally of said needle bar, whereby a parallel relationship between said arm and foot is maintained, and a reinforcing element on said arm, the junction of said arm and element cooperating to define said recesses.

'7. In a sewing machine, a needle arm of relatively great width adapted to hold a plurality of needles therein, and a laterally extending reinforcing element on the rear face of said arm along substantially the entire width thereof and secured thereto at a plurality of points, and recesses formed at least partly by said element providing a plurality of guide slots.

8. A sewing machine comprising a needle bar having a needle arm of relatively great width adapted to hold a plurality of needles therein. a presser foot of corresponding width, said arm and foot having at least one set of cooperating extensions and recesses located laterally of said needle bar, a feed dog frame, a plurality of integrally formed parallel feed bars within said frame, means for moving said frame, a throat plate having a plurality of needle openings therein and of slots, said feed bars entering said slots, whereby a close spacing of said needles, feed bars, needle openings, and slots is obtained.

9. In a sewing machine, a needle bar having a needle arm of relatively great width adapted to hold a plurality of needles therein, a presser foot of corresponding width, said arm and foot having cooperating members located laterally of said needle bar, whereby a parallel relationship between said arm and foot is maintained.

10. In a sewing machine, a needle bar having a needle arm of relatively great width extending laterally on both sides of said bar and adapted to hold a plurality of needles therein, a presser foot of corresponding width, said arm and foot having cooperating members located laterally of said needle bar, said members being on both sides of said bar, whereby a parallel relationship between said arm and foot is maintained.

JACOB BRUSSELL.

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