DE273177C

DE273177C -

Info

Publication number: DE273177C
Application number: DENDAT273177D
Authority: DE

Description

KAISERLICHESIMPERIAL

PATENTAMT.PATENT OFFICE.

PATENTSCHRIFTPATENT LETTERING

- M 273177 KLASSE Te. GRUPPE- M 273177 CLASS Te. GROUP

JAMES ALEXANDER LIND,JAMES ALEXANDER LIND,

Verfahren zur Herstellung von Maschinennadeln. Patentiert im Deutschen Reiche vom 6. März 1913 ab.Process for the production of machine needles. Patented in the German Empire on March 6, 1913 .

Die Erfindung betrifft ein Verfahren zur Herstellung einer leicht einfädelbaren Maschinennähnadel. Es wird bezweckt, ein einfaches und praktisches Verfahren zu schaffen, welches gestattet, die Nadeln, wie jetzt gebräuchlich, aus einem einzigen Drahtstück herzustellen, indem ein Teil ausgestreckt wird, ein Querschlitz in den stärkeren Teil des Drahtes kurz vor der Verjüngung zur Herstellung des Nadelöhrs und eine Längsnut in dem stärkeren Teile gebildet wird, deren Länge, Breite und Tiefe im wesentlichen von gleichen Abmessungen ist als der ausgestreckte Drahtteil. Die Tiefe der Nut zwischen dem Nadelöhr und dem verjungten Teile des Drahtes wird dem Durchmesser des dünnen Drahtteiles annähernd gleich oder größer gewählt. Der dünne Teil wird dann nach rückwärts über den stärkeren Teil gefaltet und in die Nut eingeführt. Er bildet auf diese Weise einen biegsamen Arm, der aus einem Stück mit dem Schaftende besteht. Der Schaft wird dann an dem umgebogenen Ende in eine Nadelspitze ausgezogen, und zu gleicher Zeit werden die Wandungen des vertieften Nutenteiles unterhalb des Öhrs gefaltet, und zwar über und um den entsprechenden Teil des dünnen Drahtes, der hierdurch festgehalten wird.The invention relates to a method for producing an easily threadable machine sewing needle. The aim is to create a simple and practical method which allows the needles, as is now customary, Make a transverse slot from a single piece of wire by stretching out one part into the thicker part of the wire just before the taper to create the eye of the needle and a longitudinal groove is formed in the thicker parts, the length, width and depth of which is of substantially the same dimensions as the extended wire portion. The depth of the The groove between the eye of the needle and the tapered part of the wire becomes the diameter of the thin wire part is selected to be approximately the same or larger. The thin part will then folded backwards over the thicker part and inserted into the groove. He trains on this Make a flexible arm that is made in one piece with the shaft end. The shaft is then drawn out into a needle point at the bent end, and at the same time the walls of the recessed groove part are folded below the eye, namely over and around the corresponding part of the thin wire that is thereby held in place will.

Ein anderes Merkmal der Erfindung besteht darin, daß der durch den dünnen Drahtteil gebildete federnde Arm in eine Nut quer zu dem Nadelöhr eingelegt wird, wodurch der Faden leicht in das Nadelöhr eingeführt werden kann, jedoch zwangläufig an einem Austreten auf dem gleichen Wege verhindert wird.Another feature of the invention is that the formed by the thin wire portion resilient arm is inserted into a groove across the eye of the needle, whereby the thread can be easily inserted into the eye of the needle, however, it is inevitably prevented from exiting in the same way.

Auf der beiliegenden Zeichnung ist eine beispielsweise Ausführungsform der Erfindung veranschaulicht, und zwar zeigtOn the accompanying drawing is an exemplary embodiment of the invention illustrates, namely shows

Fig. ι ein geradliniges Drahtstück, aus dem die Nadel hergestellt wird.Fig. Ι a straight piece of wire from which the needle is made.

Aus Fig. 2 ist das Werkstück nach der ersten Arbeitsstufe ersichtlich, die darin besteht, daß der Endteil des Drahtes ausgestreckt wird.From Fig. 2, the workpiece can be seen after the first stage, which consists in that the end portion of the wire is stretched out.

Fig. 3 zeigt einen Querschlitz durch den Schaft an seinem starken Teile.Fig. 3 shows a transverse slot through the shaft on its strong part.

Aus Fig. 4 ist die Längsnut in dem Schaftteile der Nadel ersichtlich.From Fig. 4, the longitudinal groove in the shaft part of the needle can be seen.

Fig. 5 zeigt einen Schnitt nach der Linie 5-5 der Fig. 4. Aus dieser Figur ist die Längsnut ersichtlich, in welcher der biegsame Arm liegt, wenn er nach abwärts gedrückt bzw. in seiner Arbeitsstellung gesperrt ist.Fig. 5 shows a section along the line 5-5 of Fig. 4. From this figure is the longitudinal groove can be seen in which the flexible arm lies when it is pushed downwards or in its Working position is locked.

Fig. 6 zeigt einen mittleren Längsschnitt, aus welchem der Öhrschlitz und die Längsnut mit den dazugehörigen Teilen zwischen dem Öhr und dem verjüngten Nadelteile ersichtlich ist. Aus dieser Figur kann gleichfalls der kurze abgeflachte Teil ersehen werden, welcher eine Schulter in dem öhr zum Festhalten des Fadens bildet.Fig. 6 shows a central longitudinal section, from which the eye slit and the longitudinal groove with the associated parts between the eye and the tapered needle parts can be seen. From this figure the short flattened part can also be seen, which one Forms shoulder in the eye to hold the thread.

Fig. 7 ist ein Schnitt in vergrößertem Maßstäbe, gezeichnet nach der Linie 7-7 der Fig. 6.FIG. 7 is a section on an enlarged scale taken along line 7-7 of FIG. 6.

Claims

Fig. 8 shows the thin wire part after it has been bent back into the groove of the shaft part is.

FIG. 9 shows a section along the line 9-9 of FIG. 8 drawn on an enlarged scale, from which the position of the thin wire part in the recessed part of the groove can be seen.
Fig. 10 shows the thin part at the bend after it has been drawn into a needle point.

Figure 11 is a section on line 11-11 10 on an enlarged scale, from which it can be seen how the side walls of the recessed groove part has been bent over and around the corresponding tapered wire part are.

Fig. 12 shows a drawn on a larger scale Cross section along the line 12-12 of Fig. 10, and from

13 shows the needle ready for use.

In the drawing, 20 denotes a full piece of wire from which the needle is made shall be. As can be seen from Fig. 2, a part of the piece of wire is drawn out thinly, the (21) is connected to the larger part by a shoulder 22. The second stage of work consists of grinding or im Die to form a transverse slot 23 a short distance from the shoulder 22 for the purpose of manufacture the eye of the needle. The walls on each side of the slot are undercut and at 36 and 37 rounded to accommodate the thread.

A longitudinal groove 24 is then formed in the shaft parts by grinding. This groove is of sufficient length, width and depth to accommodate the thin wire part 21, if it is bent over the shaft part. An essential feature of the present invention is that this groove is deeper below the eye at 25, which is usually through Grinding or in a die. The depth of the groove at this point is greater, than the diameter at the corresponding part of the thin wire. In other In other words, the depth of the groove should be large enough to accommodate the thin wire part in this way to be able to do that when the edges of the walls of the groove are closed over this part they touch to hold the thin wire part.

After the groove 24 and the slot 23 have been formed, a wide area Cutting tool used to remove sharp corners 27 and 28 on each edge, so that they do not come into contact with the tissue when the needle is used. The removal of the corners 27 also facilitates the introduction of the thread into the eye of the needle.

The next job is to get the thin piece of wire just below the Bend shoulder 22 and insert it into the grooves 24 and 25 (Fig. 8), in what way a thin flexible arm 21 is formed.

The shaft at the bend 29 is formed as a needle point by means of a die, which goes obliquely to the eye. At the same time, the groove wall is bent over at point 25, so that the lips 30 and 31 lay over the thin wire part at this point. This part of the thin wire between the eye and the tip becomes safe this way held in the shaft of the needle, making it very tough near the needle tip and the parts cannot separate from each other.

The remaining part of the resilient arm lies in the groove 24 in which it runs over its entire length is safely protected against lateral loads. The top of the arm is over turned a little upwards to allow the thread to pass through the back of the Armes to facilitate threading. As can be seen from FIGS. 10 and 12, there is threading the thread into the needle with the double end of the thread over the end 37 of the flexible arm and then pushed downwards almost to the eye will. A slight pull on the thread is sufficient at this point to activate the spring force of the arm to overpower and insert the thread into the eye of the needle. If the thread, like the Sewing is done, is stretched, then the walls 36, 37 serve on each side of the groove 24 in conjunction with the resilient arms to block the thread in the eye and prevent effectively pulling the thread out through the insertion channel. In the In the longitudinal direction of the shaft and on its opposite sides, grooves 33 are provided, in which the thread can lie while the needle goes through the fabric. Also can a ring 34 can be provided on the needle shaft, which extends over the free end of the resilient Arm is pushed to hold it securely in the longitudinal groove. Using a however, such a ring is not required in a needle manufactured according to the invention.

Patent-A ν claim:

Process for the production of easy-to-thread machine sewing needles, characterized through the following four successive operations: ■

i. Thin out a part of the blank, the thin part being attached connects the stronger one by a shoulder (22);

2. Formation of a transverse slot (23) serving as the eye of a needle, the walls of which are undercut and partially rounded to accommodate the thread;

3. Forming a longitudinal groove (24) in the shaft part by grinding, the Groove below the eye is deeper, around the thin wire part (21) in such a way record that when closing the walls of the groove touch so that the thin wire part is held will;

Bend the thin wire part below the shoulder (22) and insert it into the groove (24), the end of the shaft being designed as a needle point that goes obliquely to the eye, and simultaneous bending of the groove wall.

For this purpose ι sheet of drawings.