US1323340A

US1323340A - Machine

Info

Publication number: US1323340A
Authority: US
Publication date: 1919-12-02
Anticipated expiration: 1936-12-02

Description

J. .P. was. I NEEDLE FOR CHAIN STITCH SEWING MACHHQES.

; APPLICATION man SEPT. 11. 1918. 1,323,340;

' Patented Dec. 2,1919.

IN VEN TOR.

UNITED STATES PATENT oF noE.

JOHN P. were, or NYACK, NEW YORK, ASSIGNOR TOMETROPOLITAN sr wmc MACHINE CORPORATION, A CORPORATION or DELAWARE- NEEDLE FOR CHAIN-STITCH SEWING-MACHINES.-

To all whom it may concern; Be it known that I, JOHN P. WEIS, a c1t1 zen of the United States, residing at Nyack, in the county of Rockland and State of New York, have invented certain newand useful Improvements in Needles for Chaintrally or axially of the needle, as is usual,

and having as another feature thereof a pair of spirally formed grooves, the obJect of the invention being to provide an improved needle particularly adapted for use with a two-thread chain stitch sewing machine, the needle being sofconstructed that it may be threaded at right angles to the line of feed and by means of which the necessity of providing loopers having a laterally vibrating movement is eliminated while at the same time delicate threads can be handled with greater facility and the sewing conditions greatly improved since. the grooves are shaped to accommodate the natural run of the thread during the stitchQ ing operation.

The off-set point permits the needle to so co-act with the loopers that not only is the skipping of stitches prevented but the use of loopers having a lateral vibrating movement is entirely eliminated; that is to say, by the use of this improved needle the wellknown two-thread chain stitch sewing machines perform their functions without the necessity of theloopers having the usual socalled needle avoiding movements. Consequently many of the parts heretofore necessary in two-thread chain stitch sewing machines can be dispensed wlth, resulting in economy of parts, easier malntenance and greater simplicity, obviatingnoise, friction, etc.

I am aware that various shapes of needle points have. been provided for different characters of work and that grooves of various lengths and shapes have been used, but so far as I know I am the first to provide an off-set point needle with one or morespiral rooves and which enables the formation 0 double chain stitching without the Specification of Letters Patent.

IIhe needle blade terminates in a Patented Dec. 2, 1919.

Application filed September 11, 1918. Serial No. 253,535.

necessity of having loopers operating from one side to the other of the needle, and also without the use ofspreaders for spreading the looper loop. Another important advantage of this improved off-set point needle is that the deflection of the needle when penetrating the goods is always in the one direction, 2'. 0., toward the looper, and this also obviates the use of a needle guide.

In the accompanying application of A. H.

Weis, Serial No. 255,666, filed September 25, 1918, for improvements in sewing machine looper mechanism this improved needle is shown in connection with an improved looper forthe making of double thread chain stitches.

In the drawings accompanying and forming, a part of this specification, Figure l is a front elevation of this improved needle provided with a twist groove and a lefthand off-set point; Fig. 2- is a view similar to Fig. 1 showing the needle made with a right-hand ofl;set point; Fig. .3 .is a sectional view of the needle splitting the eye thereof; and Fig. 4:. is a View showing the left-hand side of the needle illustrated in Fi 1. Similar characters of reference indicate corresponding parts in the several figures of the drawings.

This improved needle comp-rises a shank l, terminating in a blade 2, which is grooved as at 3 to receive one strand of the needle thread. This groove isspirally formed as at 4 so as to extend from the front to one side as at 5 where'it merges into the eye 6.

The opposite side of the needle adjacent to this eye is also grooved as at 7 for a certain distance and is also provided with a notch 8 and a groove 9, which extends from the top of the notch to the rear orthat side of the needle opposite the groove 3. The straight groove 7 is shown intersecting or crossing the eye of the needle and leads to the notch 8, which notchis for the purpose of permits ting the looper point to pass between the needle and the thread to catch the needle loop and also prevents the thread from being pinched oil as the needle enters the. work.

point 10" ll of the needle, and this point 10 lies in the j same'plane with one of the Walls of the needle blade, v This point with respect to the center line or vertical axis of the needle blade may be located at any radial position relatively to the axis of the needle so as to project toward any pbint of a circle around the needle blade so as to properly cooperate with the looper. 'In the present instance I have shown a right-hand and. a left-hand offset point, but in actual practice these points may be considered as front and rear off-set points depending upon the character of machine in which the needles are to be used. For instance, in the needle shown in Fig. 2, when used with a looper operating at right angles to the line of feed as shown and described in the said application of A. H.

WVeis, the point and notch of the needles would be the rear side and in that instance I would. prefer to use a straight grooved needle,because in that type of machine the action of the needle thread is from front to rear in the direction of the line of feed. In machines having the loopers operate parallel to the line of feed, I prefer to use the twist grooved needle because the thread enters from the front twists around to the side, either to the right or left, at right angles to the front of the needle to the opposite side thereof where the looper cooperates with the notch of the needle in the formation of the stitches, the thread extending through the needle eye and in loop form around the looper when the needle is up and when the needle is down the thread extends from the front twist groove through the eye at the side up the opposite side of the needle in the twist groove to the back of the needle through the previously made stitch. I have found by the use of the twist groove delicate threads can be handled with greater facility and the sewing conditions are greatly improved by reason of the groove being shaped to acommodate the natural run of the thread during the stitching operation.

It will be observed that the eye of the needle extends in the same direction as the offset point and not transversely" to the direction in which said point is offset, so that the needle is threaded at right angles to the line of feed.

The disadvantages present in the use of a straight grooved needle having a notch are entirely overcome by the present improved needle. In a straight grooved needle having a notch the thread falls into the notch; in other words. the thread makes a quarter twist from the straight groove around the needle and drops into the notch and causes skipping and breaking of the thread for in making the twist around the needle from the straight groove to the notch it necessarily crosses one of the sharp edges of the groove and this interferes with the drawing up of a tight stitch and frequently causes the breaking of a thread. By providing how ever, the twist or spiral groove, the twist forms a natural path to accommodate the run of the thread to the notch and by reason of the fact that the bottom of the needle is also grooved as at 7, and as this groove leads directly to the notch 8, it follows that the run of the thread extending from the needle eye bridges overthe notch to the groove 9 whereby it is steadied at the time the looper is co-acting with the needle, and as the point of the needle is offset in the manner hereinbefore stated, this enables the needle to co-act with a looper operating in a single plane to properly get behind the looper thread. If it were not for the notch the thread would lie directly against the body of the needle and the slightest deflection of the needle would cause the skipping of stitches'so that the point of the looperwould soon be worn away.

I claim as my invention:

1. An eye-po1nted sewing machine needle having an ofi'set point, a notch above the eye, a spiral groove leading upwardly from the notch, and a straight groove intersecting the eye and leading to the notch.

2, An eye pointed sewing machine needle having-an off-set point and a spiralgroove merging into the eye.

3. An eye pointed sewing machine needle having an off-set point, a spiral groove 95 merging into the eye, and a groove extending to that side of the needleopposite to that of the spiral groove. e

4:. An eye pointed sewing machine needle having an offset point, a spiral groove merging into the eye, a groove extending to that side of the needle opposite to that of the spiral groove, and a notch from the top of which said last groove extends.

5. An eye pointed sewing machine needle 105 having an off-set point, a notch at its front side, a groove extending from the top of the notch to, one side of the needle, and a spirally formed groove extending from the front side of the needle to the side thereof opposite that to which said first groove extends and merging into the eye of the needle.

6. An eye pointed needle for sewing machines having a point ofl"-set from the center line or vertical axis of the needle and provided with one or more spiral grooves, one terminating in the eye of the needle.

7 An eye pointed needle for sewing machines having a point off-Set from the center line or vertical axis of the needle and provided with a plurality of spirally formed grooves.

8. An eye pointed needle for sewing machines having a point off-set from thecenter line or vertical axis of the needle and provided with a plurality of spirally formed grooves," one terminating in the eye of the needle.

9. An eye pointed needle for sewing machines having a point off-set from the center line or vertical axis of the needle and provided with a plurality of spirally formed grooves, one terminating in the eyev of the needle and located at opposite sides of the needle.

10. An eye pointed needle for sewing machines having a point ofi-set from the center line or vertical axis of the needle and pro.- vided with a plurality of spirally formed grooves, one terminating in the eye of the needle and located at opposite sides of the needle and the other terminating in a notch located at the front of the needle.

11. An eye pointed needle for sewing machines having a point off-set from the center line or vertical axis of the needle and provided with a plurality of spirally formed grooves, one terminating in the eye of the needle and located at opposite sides of the needle and the other terminating in a notch located at the front of the needle, said notch merging into a third groove adjacent to the eye and at the front of the needle.

12. An eye pointed needle for chain stitch sewing machines comprising a shank and blade, the latter having a pomt off-set from the center line or vertical axis of the needle and provided with a plurality of spirally formed grooves, one terminating in the eye of the needle and located at opposite sides of the needle and the other terminating in a notch located at the front of the needle, said notch merging into a third groove adjacent to the eye and at the front of the needle.

' 13. An eye pointed sewing machine needle having an ofl-set point, a spiral groove', and a notch adjacent to said eye. lt. An eye pointed sewing machine needle havlng an offset point, a pair of spiral grooves, one merging into said eye, and a notch adjacent to said eye.

An eye pointed sewing machine needle having a pair of spirally formed grooves.

16. An eye pointed sewing machine needle having a pair of spirally formed grooves, one only merging into the eye.

17. An eye pointed sewing machine needle having an oifset point, one or more spiral grooves, the eye of the needle extending in the same direction as the offset point.

18. An eye pointed sewing machine needle having an offset point and a spiral groove.

19. An eye-pointed sewing machine needle 7 having an offset point, a notch above the eye,

a spiral groove leading upwardly from the notch, a straight groove intersecting the eye and leading to the notch, and another spiral groove leading upwardly from the eye, both of said grooves having a long gradual spiral formation.

Signed at Nyack, county of Rockland and State of New York, this 5th day of Sept. 1918.

JOHN P. WEIS.