US1350592A - Needle-threader for sewing-machines - Google Patents

Description

A. CORDUAN. NEEDLE THREADER EoR SEWINGA MACHINES.'

APPLICATION FILED APR. 30| I9I9.

Patented A119924, 1920.

A-DoLrH CORDUAN, or Ro'sELLE PARK, NEW JERSEY.

NEEDLE-THREADER FOR ASEVINGr-lVIAC-IIIWIEIS.

:Specification of Letters Patent.

Patented Aug. 24C, 1920.

Application filed April 30, 1919. Serial No. 293,618.

T 0 all whemt may concern Be it known that 1 Anognrn CQRDUAN, a citizen ofthe iUnited States, `and a resident of Roselle Park, county of Union, andState of New Jersey, have invented certain new` and useful Improvements Yin Needle-Threaders for Sewing-Machines, of which fthe following is a specification.

This invention relates ,to lan improved needle threader o f the type that is attached to a sewing machine and which is swung down into position to thread the needle when desired, and is returned to an inoperative or out-of-the-way position when released.

The invention is designed to provide a needle threader of this kind which is adustable in several directions so that after vbeing attached to a sewing machine it can be regulated so thatwhen swung into position the threading` .hook enters the eye Aof the needle without unnecessary strain on either the needle or the hook.

The invention is further designed to provide a needle threader ,of this kind which has the threading hook vheld by securing Lmeans that can be easily released and a lbroken hook can be quickly removed and replaced by another ,when necessary.

The invention further vprovides for a threading device of this kind Iin which the hook is's'o disposed that it does not carry the `loop of the thread lto a point beyond the needle after the needle is'threaded, so that manual removal is not necessary. In other words, thethreadis carried through the eye of the needle in threading and released after material length has been carried through and the thread is notcarried by the hookup tothe linoperative fposition ofthe threader. 1n factories -wherethese devices are used and but one operator is taking care of many machines, this is a factor ythat is desirable since Vit is not necessary to take the time to release the loop from the threading hook.

The invention is illustrated inthe accompanying drawing, in which Figure 1 is a front view of the bottom part of the head of a sewing machine, the threader being shown in elevation and the lower part of the sewing machine needle being shown'in section. Fig. 2 is a side view of the construction shownin Fig. 1. Fig. 3 is a bottom view of a bracket which is part ofthe threading -device and by means of which it is secured to the presser foot post of the ma chine. Fig. i is a section through the threading hook and its holder taken on line 4 in Fig. 1, and Fig. 5 is a section through the joint by means of which the arm of the threader is pivoted to the bracket.

For the purpose of illustration I show one form of threading device, but it will be understood that slight modifications can be made in the disposition and formation of the parts without departing from the scope of the invention.

1n the drawing 10 indicates the head of the sewing machine, 11 is the needle bar and 12 is the needle. 13 is the presser foot bar on which the presser .foot 14 is suspended, these parts as enumerated all being old .and being in substantially the same relative positions in all sewing machines. My threader is secured to the presser foot 'bar 13 by means .of a bracket, the bracket comprising two members 15 and 16, the member 15 'having a sleeve 17 which lits around the presser foot bar and has a flat plate 18 on which the plate 19 of the member v16 is adapted to slide, the plate 1-9 having a disk 20 thereon which cooperates with a similar disk, as will be hereinafter described.

The 4two members 15 and 1G are adapted to be secured in different adjusted positions, one form of-fastening being shown and consisting of the screws 21 which pass through the slots 22, these slots being long enough to permit a sliding` adjustment when the screws 21 are unscrewed, the screws `when tightened holding these two members 15 and 16 in any `desired adjusted positions. The `bracket can swingV freely on the bar 13 and is usually supported by a suitable friction device, such as the spring 23, which abuts at Ione end on the under side of the member 15, and abuts at the otherend on a collar 211 which is fastened in placeby suitable means, such as the screw'25.

Secured to the-bracket is an arm 26 which preferably is made so that it can be adjusted as to its length, and for this purpose it is made of two Vmembers 2 7 and 23, the inember 27 having a disk portion 29 which abuts against vthe disk portion ZO ofthe bracket, these disks 2O and 29 usually being rbulged sufliciently to receive a spring 30, which has one end, as 31, projecting through one end, and the other end, as at 32, projecting through the other disk so that the arm is under tension of the spring 30, the two disks being held so that the arm can swing on the bracket by means of a suitable pm or rivet 33.

rlhe members 27 and 28 are arranged telescopically. In the form shown, the member 27 is provided with a slot 34, and a screw 35 passes through the slot and is in screwthreaded engagement with the member 28, and in this way the arm can be adj usted as to its length. The end of the arm 28 is provided with a finder 36 which swings on a stud37 which is fastened to the end of the member 28, the finder being adapted 'to have a limited swinging movement, being' limited in one direction by the abutment 38 and in the other direction by the abutment 39. The finder 36 has one edge tapered, as at 40, to permit the insertion of the thread in the hook 42, and its end 41 is rounded so as to g'ive smooth surfaces in all directions, and

alongside of the inclined or tapered side 40,

and projecting slightly beyond it, is the said threading hook 42 with the extremity 43 formedwith a slight notch or depression to receive the thread, the hook 42 having a pair of openings which fit over the studs 44, these studs being secured to the finder 36.

the finder 36 and is adapted to bear with a spring' pressure against the threading hook 42 and hold it in position, the spring also having openings which fit over the studs 44. The end 46 of the fiat spring 45 is bent away enough from the hook to provide for getting the finger nail under it so that it can be pulled out, and in this yway a broken hook f can be withdrawn and a new hook installed,

the release of the spring permitting it to snap back so as to hold the hook in position. The forward :end of the finder'36 is slightly offset so that when the finder bears against the side of the needle, the threading hook is in line with the eye 47 of the needle 12.

When the device .is installed on a maf chine, the adjustment to the front and rear can be made by unscrewing the screws 21 slightly and moving the member 16 until the 1 hook 42 is in line with the eye of the needle,

and by screwing up the screws 2l when the ,adjustment is made, the parts are held in this position. By means of the slot 34 and` the screw 35, the length of the arm can be adjusted so as to bring the threading hook approximately in position to enter the eye -of the needle whenl the arm is swung down to the position shown in dotted outline in the lower part of Fig. 1. It is noted that,`

in the disposition of the parts, when the end of the arm is swungdownward, the curved part of the threading hook, that is, the back of the part 43, is uppermost, and if this curved part engages the upper edge of the eye of the needle, it is swung by such A spring 45 is fastened so as to swing with v slightly rounded part so that the entrance of the hook into the eye of the needle is made easy.

The' abutment 38 prevents excessive inward movement of the finder 36, and consequently the threading hook, and when the arm is swung downward by the thumb and first finger' of the hand, in which manner it is usually done, the hook is brought in nearly perfect alinement with the eye'of the needle, and as the end of the hook passes beyond the vertical plane passing through the center of .the aivot 33 the threading hook continues to pass substantially horizontally because its upper edge is bearing against the upper wall of the eye of the needle and the movement of the threading hook is substantially horizontal and no longer in a curved line.

When the thread is carried under the hook 4 2, thehook is released and the spring 30 snaps the arm 28 around to the position shown in full lines in Fig. l, and this pulls the loop of the thread with it. lVhenever released, the arm swings to its uppermost position, and to prevent the hook `and the finder engaging goods passing under the head of the sewing machine, the finder can be swung upward, -as shown in dotted outline in the upper part of Fig. 1, so that it lies fairly close against the head of the sewing j machine; When the arm 26 swings upward it can also be arranged to swing to the rear, so that its normal position is in back of the head of the sewing machine, `by having the ends 48 and 49 of the spring 23 secured in suitable holes in the bracket and in the collar 24, respectively, the hole 50 in the bracket and a similar hole inthe collar 24 acting to normally twist the bracket, and consequently the arm` around to a 4position in rear of the sewing machine head,

A lhen it is swung forward` the bracket is limited in its swinging movement usually by engagement with a stop, and in the form shown the plate 18 of the member 15 abuts or hits against the needle bar 11 so that when the threader is swung around to the front until it stops, it is in position with its threading hook in the same vertical plane as the eye of the needle. so that when the arm 26 is swung downward. the threading hook enters the eye 'of the needle without the necessity of the operator making repeated efforts to find the eye of the needle with the threading hook.

In order to allow for the space between the presserfoot bar 13 and the needle`r the parts are offset, in theform shown this ofi"- set being shown at 51 in `theta-rm 28, but it will befunderstood'that other parts can be offset to bring the threading hook over to a position where it is in line 'with the eye or" the needle.. f

If desired, one of the disks,V preferably the disk formed as part of the member 16,

is provided with a projection 52 that has an opening 53, one edge of which is sharpened and which has a converging entrance slot 5A so as to Yform a thread cutter.

It will be understood that the collar 24 can be adjusted to make the tension of the spring such as to normally hold the threader in the position shown in the drawing, that is, in its forward position ready to be swung down to thread the needle.

lilith the arrangement shown herein of mounting the member or bracket on theJ presser foot bai', the raising or lowering of the presser foot bar does not alter the position of the bracket, since it is held by the pressure of the spi-ing in position against the bottom or the head of the sewing machine, and whethei the presser 'foot bar is down or up makes no difference so 'fa-r as the vertical position of the threader is concerned. lt will be understood that a particular positon for the needle is preferred, the parts being adjusted so that the needle is in position to be threaded when it is at its highest point in its path of travel.

l claim:

l. A needle threader for sewing machines comprising a threading hook secured on the end of an arm swinging in a vertical plane, a bracket to which the arm is secured, and means for supporting the bracket so that it can swing in a horizontal plane.

2. A needle threader for sewing machines comprising a threading hook secured on the end of an arm swinging in a vertical plane, a bracket to which the arm is secured, means for supporting the bracket so that it can swing in a horizontal plane, and means for limiting the swinging of the bracket to bring the threading hook in the same plane as the eye of a needle in the machine.

3. A needle threader for sewing machines comprising a vertically swinging arm, a horizontally swinging bracket, a spring coniiection between them to normally hold the arm in raised position, the ai'm being adjustable as to its length, and a threading hook on the free end of the arm and mounted so as to have a limited swinging movement in a plane parallel to the plane of the swinging movement of the arm.

4L. A needle threader for sewing machines comprising a vertically swinging arm, a bracket to which the arm is pivoted, the bracket having'a sleeve thereon to surround the presser bar of the sewing machine, a collar on the presser bar, a spring abutting on the collar and the bracket, and a threading hook mounted on the end of the arm and pointing in a plane parallel to the plane in which the arm swings.

5. A needle threader for sewing machines comprising a bracket made of two members slidably arranged and having means for securing them in adjusted positions, one member being adapted to be secured to the presser bar of a sewing machine, and the other member having a pivot plate, an arm consisting of two members, one member having a pivot plate to be attached to the pivot plate of the bracket, the members of the arm being slidably secured together and having means for securing them in adjusted positions, a guide pivoted to the free end of the arm, the arm having a stop so that the swinging of the guide is limited, and a threading hook secured to the guide and substantially parallel thereto, the guide being substantially parallel to the plane in which the arm swings.

In testimony that I claim the foregoing, l have hereto set my hand, this 26th day of April, 1919.

ADOLPH CORDUAN.

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