BE460098A

BE460098A -

Info

Publication number: BE460098A
Authority: BE
Priority date: 1943-12-02
Also published as: FR910321A

Description

       

  Machine à coudre permettant de remmailler.

  
L'objet de la présente invention est une machine à coudre permettant de remmailler. Cette machine est caractérisée par un dispositif fournissant de l'air à une pression variant périodiquement, dispositif destiné, d'une

  
part, à être entraîné par le mouvement de la machine et, d'autre part, à être relié par un tube souple à une aiguille pneumatique à remmailler. 

  
Le dessin ci-annexé représente, à titre d'exemple,

  
une forme d'exécution de la machine faisait l'objet de l'invention.

  
La fig.l en est une vue en élévation avec coupe partielle et la fig.2 une coupe suivant II-II de fig.l.

  
 <EMI ID=1.1> 

  
et debout d'une variante.

  
Dans la forme d'exécution représentée (figs.l et 2), la machine à coudre 1 peut être d'un modèle usuel quelconque, Le dispositif permettant de remmailler est amovible. Il comprend un cylindre 2 solidaire d'un socle 3 pouvant

  
 <EMI ID=2.1> 

  
d'une vis à tête moletée 4. Le socle porte un raccord 5 permettant de fixer un tube souple 6 et communiquant avec l'intérieur du cylindre par un canal 7.

  
Le cylindre est ouvert à sa partie supérieure et contient un piston 8 avec rainures circulaires de retenue d'huile. La tige du piston est formée d'un ressert à boudin 9 fixé dans la base du piston et se terminant par une boucle 10. Cette boucle est enfilée six un doigt amovible

  
 <EMI ID=3.1> 

  
chine au moyen d'une vis à tête moletée 12.

  
Le fonctionnement de cette machine est le suivant.

  
Pour pouvoir remmailler avec la machine, il suffit de

  
 <EMI ID=4.1> 

  
vis 4. Puis on place sur le porte-aiguille de la machine,  <EMI ID=5.1> 

  
mant tige de piston est enfilée sur l'extrémité du doigt

  
11. L'équipement est complété par une aiguille pneumatique à remailler avec son tube souple de raccordement 6. Ce dernier est enfilé par son extrémité libre sur le raccord 5 du socle 3. La machine est alors prête à fonctionner, L'entraînement de la machine à coudre peut se faire soit avec la pédale soit avec le moteur électricité, de manière à laisser à l'opératrice ses deux mains libres, l'une te-

  
 <EMI ID=6.1> 

  
trémité du tube souple 6.

  
L'aiguille à remmailler est en forme de crochet et montée dans un porte-aiguille en forme de crayon, de manière à pouvoir coulisser longitudinalement. Le porte-aiguille renferme un cylindre présentait, à l'extrémité opposée à l'aiguille, un raccord fixé à un tube souple d'alimentation d'air , et à l'autre extrémité un piston relié à l'aiguille. Le tube de raccordement et les deux cylindres forment un volume d'air fermé par les deux pistonso Lorsque le piston, entraîné par la machine à coudre se meut alternativement, l'air subit des variations de pressions alternatives plus et moins par rapport à la pression ambiante. Le piston de l'aiguille à remmailler est donc successivement aspiré et refoulé et donne à l'aiguille à remmailler le mouvement longitudinal de va-et-vient qui lui est nécessaire. 

  
En variante, le cylindre 2 pourra être monté de façon permanente dans la machine à coudre, seul le raccord apparaissant à l'extérieur, en 5t par exemple. Lorsque la machine ne serait pas utilisée pour le remmaillage, le ressort pourrait être décroché du doigt d'entraînement, en ouvrant la plaquette mobile 13, par exemple.

  
 <EMI ID=7.1> 

  
un raccord 5", ou en toute aitre partie de la machine, d'une manière permanente avec ou sans débrayage ou de façon amovible.

  
Une variante consiste aussi à remplacer le piston par

  
 <EMI ID=8.1> 

  
dre comprend un cylindre la fixé de manière amovible sur son bâti au moyen d'une vis 2a. Cette vis s'engage dans une encoche Sa_ que présente la base 4a du cylindre la.

  
Le cylindre est ouvert à son extrémité supérieure et muni à sa partie inférieure d'un raccord 5a permettait de placer un tube élastique de raccordement à l'aiguille à remmailler.

  
Un piston 6a est ajusté dans le cylindre et relié par une bielle 7a à un bras transversal 10a articulé en 8a sur

  
 <EMI ID=9.1> 

  
machine à coudre. 

  
Dans la paroi du cylindre, un trou 13a de petit diamètre est prévu un peu au-dessous de la position qu'occupe le piston en fin de course supérieure.

  
Le fonctionnement de cette variante est le suivant:
Pour remmailler, il suffit de fixer le cylindre la

  
 <EMI ID=10.1> 

  
Il!:. est enfilée sur la vis 12a de manière à ce que le mouvement alternatif de haut en bas du porte-aiguille de la machine à coudre entraîne le bras 10a et par alite aussi le piston 6a au moyen de la bielle 7a.

  
L'aiguille à remmailler est alors actionnée par les succions et refoulements successifs dus au mouvement du

  
 <EMI ID=11.1> 

  
légère aspiration d'air extérieur au haut de chaque course afin d'éviter que le piston ne crée le vide dans le cylindre.

  
fin variante, on pourra encore prévoir un dispositif comprenant un cylindre fermé par une membrane reliée en son point milieu à une biellette articulée sur le levier

  
 <EMI ID=12.1> 

  
On pourra aussi prévoir un dispositif renfermant un liquide (par exemple de l'huile ou de la glycérine) comme médium de transmission de mouvement, le liquide de ce dispositif jouant le même rôle que l'air dans le dispositif décrit.



  Sewing machine for re-stitching.

  
The object of the present invention is a sewing machine for re-stitching. This machine is characterized by a device supplying air at a pressure varying periodically, device intended, from a

  
on the one hand, to be driven by the movement of the machine and, on the other hand, to be connected by a flexible tube to a pneumatic stitching needle.

  
The accompanying drawing represents, by way of example,

  
one embodiment of the machine was the subject of the invention.

  
The fig.l is an elevation view in partial section and fig.2 a section along II-II of fig.l.

  
 <EMI ID = 1.1>

  
and standing of a variant.

  
In the embodiment shown (figs.l and 2), the sewing machine 1 can be of any standard model. The device for re-stitching is removable. It comprises a cylinder 2 integral with a base 3 which can

  
 <EMI ID = 2.1>

  
a knurled screw 4. The base carries a connector 5 for fixing a flexible tube 6 and communicating with the inside of the cylinder by a channel 7.

  
The cylinder is open at its top and contains a piston 8 with circular oil retaining grooves. The piston rod is formed by a coil spring 9 fixed in the base of the piston and ending in a loop 10. This loop is threaded six a removable finger

  
 <EMI ID = 3.1>

  
chine using a knurled screw 12.

  
The operation of this machine is as follows.

  
To be able to re-mesh with the machine, it suffices to

  
 <EMI ID = 4.1>

  
screw 4. Then place on the needle holder of the machine, <EMI ID = 5.1>

  
mant piston rod is threaded over the fingertip

  
11. The equipment is completed by a pneumatic re-meshing needle with its flexible connection tube 6. The latter is threaded by its free end onto connection 5 of the base 3. The machine is then ready to operate. sewing machine can be done either with the foot pedal or with the electric motor, so as to leave the operator both free hands, one

  
 <EMI ID = 6.1>

  
flexible tube end 6.

  
The stitching needle is hook-shaped and mounted in a pencil-shaped needle holder, so that it can slide longitudinally. The needle holder contains a cylinder having, at the end opposite the needle, a connector attached to a flexible air supply tube, and at the other end a piston connected to the needle. The connecting tube and the two cylinders form an air volume closed by the two pistons o When the piston, driven by the sewing machine, moves alternately, the air undergoes variations of alternating pressures more and less compared to the pressure ambient. The piston of the re-stitching needle is therefore sucked in and out successively and gives the re-stitching needle the longitudinal back-and-forth movement which is necessary for it.

  
As a variant, the cylinder 2 can be permanently mounted in the sewing machine, only the connection appearing on the outside, at 5t for example. When the machine is not used for re-meshing, the spring could be unhooked from the drive finger, by opening the movable plate 13, for example.

  
 <EMI ID = 7.1>

  
a 5 "connection, or in any other part of the machine, permanently with or without a clutch or removably.

  
A variant also consists in replacing the piston by

  
 <EMI ID = 8.1>

  
dre comprises a cylinder fixed removably on its frame by means of a screw 2a. This screw engages in a notch Sa_ that has the base 4a of the cylinder la.

  
The cylinder is open at its upper end and provided at its lower part with a connector 5a used to place an elastic tube for connection to the stitching needle.

  
A piston 6a is fitted in the cylinder and connected by a connecting rod 7a to a transverse arm 10a articulated at 8a on

  
 <EMI ID = 9.1>

  
sewing machine.

  
In the wall of the cylinder, a small diameter hole 13a is provided a little below the position occupied by the piston at the upper end of stroke.

  
The operation of this variant is as follows:
To re-mesh, simply attach the cylinder to the

  
 <EMI ID = 10.1>

  
He!:. is threaded on the screw 12a so that the reciprocating up and down movement of the needle holder of the sewing machine drives the arm 10a and thereby also the piston 6a by means of the connecting rod 7a.

  
The stitching needle is then actuated by successive sucking and pushing back due to the movement of the

  
 <EMI ID = 11.1>

  
slight intake of outside air at the top of each stroke to prevent the piston from creating a vacuum in the cylinder.

  
end variant, we can also provide a device comprising a cylinder closed by a membrane connected at its midpoint to a link hinged on the lever

  
 <EMI ID = 12.1>

  
It is also possible to provide a device containing a liquid (for example oil or glycerin) as a movement transmission medium, the liquid of this device playing the same role as the air in the device described.

Claims

CLAIM

Sewing machine for re-stitching, character- <EMI ID = 13.1>

variation periodically, device intended, of a

hand, to be driven by the movement of the machine and,

on the other hand, to be connected by a flexible tube to a pneumatic re-stitching needle.

SUB-CLAIMS

1. Machine according to claim, characterized in

what the mentioned device is removable.

2. Machine according to claim, characterized in

what the mentioned device is permanently mounted.

3. Machine according to claim, characterized in that

that the device mentioned is fitted with a member enabling it to be placed in the rest position for times when

the machine is not used for re-meshing.

4. Machine according to claim, characterized in that

that the mentioned device comprises a cylinder and a

piston, one of these elements being fixed and carrying a connector allowing a flexible tube to be attached thereto, the other element being provided with a member allowing it to be connected at will

to one of the moving parts of the machine.

5. Machine according to claim, characterized in that

that the mentioned device comprises a cylinder and a

piston, one of these elements being fixed and carrying a

fitting allowing to fix a flexible tube, the otter element being provided with a member allowing to connect it to the engine of the machine.

6. Machine according to claim, characterized in that the mentioned device comprises a cylinder for

cage and a piston whose rod is formed of a spring terminating in a loop which can engage on a removable finger fixed to the needle holder of the sewing machine by a locking screw.

7. Machine according to claim, characterized in that the device comprises a bellows.

8. Machine according to claim, characterized in that the mentioned device comprises an articulated lever, on the one hand, on the frame of this device and, on the other hand, removably, on the needle holder of the machine. to sew.

9. Machine according to sub-claim 8, characterized in that the lever has at its free end an elastic clamp formed of two steel wire loops intended to engage on the neck of a screw integral with the needle holder. of the sewing machine.

10. Machine according to sub-claim 8, characterized in that the device comprises a cylinder provided with a small suction port and containing a piston connected by a connecting rod to the aforementioned lever.

11. Machine according to sub-claim 8, characterized in that the device comprises a cylinder closed by a membrane connected at its midpoint to a link hinged on said lever.

Sée in that the device contains a liquid as a medium for transmitting the movement.

ABSTRACT

The present invention relates to a sewing machine for re-stitching. This machine is characterized by a device supplying air at a pressure varying periodically, device intended, on the one hand, to be driven by the movement of the machine and, on the other hand, to be connected by a flexible tube to an have. -

The mentioned device may be removable or permanently mounted. It may be fitted with a member enabling it to be placed in the rest position for times when the machine is not used for re-meshing.

The device mentioned may comprise a cylinder and a piston, one of these elements being fixed and carrying a connector allowing a flexible tube to be attached thereto, the other element being provided with a member allowing it to be connected at will to the '' one of the moving parts of the machine, or the engine of the machine. The device mentioned may comprise a cylinder which can be fixed to the machine by means of a locking screw and a piston whose rod is formed of a spring terminating in a loop which can engage on a removable finger fixed on the needle holder of the sewing machine by a locking screw.

The device may include a bellows.

The mentioned device may comprise an articulated lever, on the one hand, on the frame of this device and, on the other hand, removably, on the needle holder.

of the sewing machine.

Said lever may have at its free end an elastic clip formed of two steel wire loops.

sewing machine needle holder.

The device may comprise a cylinder provided with a small suction port and containing a piston connected by a connecting rod to said lever.

The device may also include a cylinder closed by a membrane connected at its midpoint to a rod articulated on said lever.

Finally, the device may contain a liquid as a medium for transmitting the movement.