EP0245576A1 - Device for knotting smyrnastitches called Ghiodes knots on a canvas - Google Patents

Abstract

The apparatus comprises, on the one hand, a head (1) carrying a loop (8) and a guide rod (7) terminated by a button (12), and, on the other hand, a crew (13-20 ) which can slide freely along the rod (7) and which is composed of a hollow handle (13) molded in one piece with a lifting beam (14) to which two hooks (16, 17), of unequal length are articulated, and which carries a needle (19). To tie a Smyrna stitch on a canvas, the device, furnished with a pile thread (23), is pushed against the canvas, in the first place, so as to engage the loop (8) completely between two of its son, then, so as to slide the movable assembly (13-20) along the rod (7), so that the hooks (16, 17) first pass the pile wire (23) successively on both sides of the threads of the canvas between which the loop (8) is engaged, then introduce the ends one after the other into the loop (8). Then releasing the device completely from the canvas, its loop (8) pulls the ends of the pile thread on the obverse of the canvas, forming the point of Smyrna.

Description

The present invention relates to an apparatus of the type described in the preamble of claim 1. Such an apparatus is described in Swiss Patent No. 330,712. The engagement of this apparatus known in the canvas takes place in two stages: a first , to first pass the loop of the device through the canvas, holding the button at the end of the guide rod pressed against the handle of the device, and a second, to pass the hooks with the fur thread through the canvas by releasing of course the said button.

However, in use, this device tires more or less quickly the person who uses it, to the point that some become discouraged and definitively give up continuing this work. The reason for this fatigue is due to the force that must be applied to pass the pile through the canvas. It will be noted, in fact, that at the moment when a hook prepares to pass the strand of pile wire which it entails through the canvas, the free end of this strand folds around the hook, so that this the latter must push two thicknesses of pile wire through the same opening in the canvas. As the two hooks of the known device are symmetrical, so it is. four thicknesses of pile wire which must be passed at the same time in the openings of the canvas.

To the resistance, which the canvas opposes to this penetration, is added the friction of the free ends of the pile thread. These free ends must, in fact, slide in the hooks and against a strand of canvas thread as the hooks engage the pile thread in the openings of the canvas. In addition, at the time of this penetration, the external edges of the hooks bear against the strands of thread of the canvas, which are close to those between which the loop of the apparatus is engaged, with a force such that these neighboring strands are displaced, which further increases the resistance of the canvas to the penetration of the pile thread, in particular in the case of highly primed canvas. Finally, if the device is pushed with force in an oblique direction relative to the canvas, it can even happen that one or the other of the strands close to those between which the loop of the apparatus is engaged is sheared.

The invention aims to overcome these defects. Thanks to the asymmetry of the hooks, which results from the characteristic of claim 1, these hooks pass one after the other through the canvas the strands of the pile thread which they entrain. It is therefore only two thicknesses of pile wire which pass at the same time through the canvas. In addition, the hook which passes its strand of pile thread through the canvas is no longer pressed by the other hook against the strand of thread of the canvas neighboring those between which the loop of the device is engaged. The hooks therefore no longer have to deform the canvas by engaging the pile wire therein. Finally, the friction of the ends of the pile thread sliding in the hooks and against a strand of thread of the canvas is halved, since it is only the friction of one end of the pile thread that must be overcome at a time.

The asymmetry of the hooks of the device according to the invention thus has the effect of reducing to a very large extent the resistance of the canvas to the penetration of the pile thread. In practice, the device according to the invention easily enters the canvas. It can be pushed there with two fingers, whereas the known device with symmetrical hooks had to be pushed with full hand and, by certain people, even with both hands.

The special embodiments defined by claim 2 have the advantage that the first strand of the pile wire to be introduced into the loop of the device is protected between its hook and a side wall of the loop and therefore does not risk not to be pushed out of the loop, when the second strand of this wire is introduced there in turn.

Those defined by claim 3 have the advantage of preventing the hair thread from sliding around the nose of the head of the device instead of sliding in the hooks, for example in the first, which grabs a strand first place, or because of the thickness of the pile thread, which is not always very regular along this thread.

As for those defined by claims 4 and 5, they indicate the limits, respectively minimum and maximum, between which the asymmetry of the hooks should preferably be held.

Without prejudice to the aforementioned advantages of the apparatus according to the invention, it is still possible to avoid another disadvantage of the known apparatus. The person using it had, as indicated above, to press a button on the thumb to pass the loop of the device through the canvas, then release this button to pass the hooks in turn through this canvas . However, regardless of the fact that some people sometimes forgot to remove their thumbs and pressed the device at the risk of damaging the canvas, the only obligation to press the said button created, already after a few hundred points, fatigue in the thumb soon producing cramps. The features defined by claim 6 avoid this fatigue. The person using this special form of appa reil according to the invention no longer has to deal with anything other than holding the handle. Thanks to the automatic triggering, the loop of the device first enters the canvas alone and the hooks are released only when the loop has reached the end of its travel. To make a Smyrna point, this device only has to be pushed against the canvas and then to be removed after arriving at the end of the race.

Finally, the special embodiments defined by claim 7 have the advantage of further reducing the friction when the second strand of pile wire enters the loop of the device. The coefficient of friction of the pile wire is, in fact, significantly lower with the metal of the partition of the loop than with the other strand of the pile wire. The bulkhead of the loop also has the advantage of preventing the two strands of the pile thread from rubbing against each other at the risk of becoming untwisted.

• la Fig. 1 est une vue en élévation de la face arrière de la première forme d'exécution, l'appareil étant prêt à nouer un point de Smyrne;
• la Fig. 2 est une vue de profil de l'appareil de la Fig. 1;
• les Fig. 3 à 6 représentent une partie de la face avant de l'appareil de la Fig. 1 à divers stades successifs de fonctionnement;
• la Fig. 7 représente une partie de l'appareil de la Fig. 2 à un stade ultérieur de fonctionnement;
• la Fig. 8 montre le point de Smyrne terminé;
• la Fig. 9 est une vue de face, partiellement en coupe de la deuxième forme d'exécution au repos;
• la Fig. 10 est une vue en perspective d'une partie de la Fig. 9;
  

sa largeur, qui définit deux compartiments 10, 11. La cloison 9 n'est toutefois pas indispensable au bon fonctionnement de l'appareil. Un bouton 12 est fixé à l'extrémité de la tige 7.Two embodiments of the apparatus according to the invention are shown schematically and simply by way of example in the drawing, in which:

• Fig. 1 is an elevational view of the rear face of the first embodiment, the apparatus being ready to tie a Smyrna stitch;
• Fig. 2 is a side view of the apparatus of FIG. 1;
• Figs. 3 to 6 represent a part of the front face of the apparatus of FIG. 1 at various successive stages of operation;
• Fig. 7 shows part of the apparatus of FIG. 2 at a later stage of operation;
• Fig. 8 shows the completed Smyrna point;
• Fig. 9 is a front view, partially in section of the second embodiment at rest;
• Fig. 10 is a perspective view of part of FIG. 9;
  

its width, which defines two compartments 10, 11. The partition 9 is however not essential for the proper functioning of the device. A button 12 is fixed to the end of the rod 7.

The apparatus also comprises a device which can slide freely along the rod 7. This device comprises a hollow handle 13 molded in one piece from synthetic material with a lifter 14. The latter has two pins 15 to which metal hooks 16 are articulated , 17 arranged in different planes. The ends 16a, 17a of these hooks are engaged in grooves (not shown) of the cheeks 3. Each hook is guided in these grooves by a pair of pins 18, which are planted through the cheeks 3.

Fig. 1 shows that the end 16a of the hook 16 is closer to the housing 4 than the end 17a of the hook 17 is not closer to the housing 5. In the embodiment shown, this result is obtained by a longer hook 16 as the hook 17. The result would however be the same with two identical hooks, if one of them was articulated at a point farther from the lifter 14 than the other.

A needle 19 is also attached to this lifter 14 and an eyelet 20, integral with the head 1 guides the end. This eyelet 20 could also have come from manufacture in a piece in the form of a wire, suitably bent, with the pins 18. FIG. 2 shows that the hook 16, the longest, is on the side of the needle 19. Looking at the front face of the device, the hook 16 is therefore behind the hook 17.

échelle selon la ligne XI-XI de la Fig. 12; la Fig. 12 est une vue de profil partiellement en coupe d'une autre _Dartie de la Fia. 9. et
ajours carrés. Une paire de fils de trame 21 et un fil 22 des paires adjacentes sont représentés en coupe dans les Fig. 3 à 6. Les fils 21, 22 sontThe apparatus described is intended to form Smyrna points on a canvas composed of pairs of warp and weft threads close together: These pairs of threads are regularly spaced

scale along line XI-XI of FIG. 12; Fig. 12 is a partially sectioned side view of another _D artie de la Fia. 9. and
square openings. A pair of weft threads 21 and a thread 22 of the adjacent pairs are shown in section in FIGS. 3 to 6. The wires 21, 22 are

To prevent the pile wire from being placed on the wrong side of the device, with its middle part 24 on the front face of the head 1, a baffle may be provided at the rear of the device. Thus, instead of an eyelet 20, coming from one-piece manufacturing with the pins 18, the latter could also have come from manufacturing in a threadlike piece, having a "U" shaped part including the jambs, at a distance one on the other smaller than the diameter of the needle 19, would extend along the latter, up to the vicinity of the end 6 of the nose 2, the rounded end of this part in "U" being curved towards the back of the head 1. The protrusion formed by this curved part, which can be beyond the cheeks 3, would prevent the fingers holding the ends of the hairline from coming close enough to the nose 2 to pass the part 24 of this wire at the front of the head 1, that is to say on the wrong side of the device.

A pile wire is correctly in place on the apparatus shown in Figs. 1 and 2. This one is ready to tie a Smyme stitch on the canvas. To this end, the device is engaged in the canvas. This engagement includes two stages.

Initially, the loop 8 is introduced between the two strands of the pair 21 of weft threads close together, then pushed fully through the canvas. In this position, shown in FIG. 3, the two strands of the pair 21 are trapped at the bottom of the concavity of the end 6 of the nose 2 of the head 1. This measurement takes on its full meaning in the case of scarcely or not primed canvas or in those whose primer has more or less disappeared; it prevents in particular that one or the other of the strands of the pair 21 is not grasped and possibly cut by the hooks 16, 17 during the next time of the maneuver. Throughout the first time described, that is to say until the loop 8 has reached the position of FIG. 3, the button 12 must be kept pressed against the handle 13. If the latter is grasped with the full hand, the button 12 will be held against the handle 13 by the thumb.

The person using the device perceives the arrival of the loop 8 in the position of FIG. 3 to the resistance that the strands of the pair 21 of the canvas then oppose in advance of the device against the canvas. At this moment, it must release the button 12 in order to carry out the second time of the engagement of the device in the canvas, starting to slide the handle 13 along the rod 7. The hook 16, the most long, then grips the part of the pile 23, which is engaged in the housing 4 and begins to push the strand 25 against the canvas, while sliding along this strand 25, towards its end, An instant later , it is the hook 17 which in turn grasps the part of the pile wire 23 engaged in the housing 5. The pile wire 23 thus takes the inclined position shown in FIG. 3. Simultaneously, the point of the needle 19, which is located near the middle part 24 of the pile wire 23, begins to crash in this part.

When the advance movement of the handle 13 along the rod 7 is continued, the hooks 16, 17 successively pass the two strands 25 and 26 of the pile wire 23 through the openings between the strands of the pair 21 of weft yarns and the strands 22 of the pairs of neighboring weft yarns. At the same time, the hooks 16, 17 slide the middle part 24 of the pile 23 along the nose 2, until this part rests on the canvas (Fig. 4).

The needle 19 helps to slide the part 24 of the pile thread along the nose 2, but it prevents this thread from turning around this nose - for example under the tensile force exerted by the hook 16 on the strand 25 hairline 23 - not only because it is planted in this part 24, but also because it compresses the part between it and the bulge 2a of the nose 2.

When passing through the openings of the canvas, the ends of the strands 25, 26 of the pile wire 23 naturally fold around the respective hooks 16, 17. Each hook thus pushes two thicknesses of pile wire into the corresponding opening of the canvas.

When the hook 16 enters the corresponding aperture of the canvas, it is guided there by the weft strand 22 of the neighboring pair, but it does not exert any particular pressure against this strand 22, which could deform it by pushing away from pair 21, because hook 17 has not yet entered the canvas. When it is the turn of this hook 17 to enter the corresponding opening of the canvas, it is guided there under the same conditions by the strand 22 of weft thread of the neighboring pair, since at this moment, the hook 16 has already crossed the canvas. Throughout this penetration, the hooks 16, 17 naturally continue to slide progressively along their respective strands 25, 26 of the pile wire, in the direction of the ends of these strands.

In order for the apparatus to operate in the manner just described, it is indicated that the distance between the ends of the hooks is at least equal to the thickness of the pile wire, so that the hook 16 has passed the strand 25 of the pile thread through the canvas, when the hook 17 is about to pass the strand 26 of this thread.

Compared to an apparatus with symmetrical hooks, that according to the invention encounters much less resistance to the passage of the pile wire 23, through the canvas, firstly because the strands 25 and 26 of this wire 23 are pushed successively and not simultaneously through the canvas and then because the hooks 16, 17, which do not not at the same time in the canvas, do not have to spread the strands of weft threads 22 neighbors of the pair 21. Furthermore, when the hook 16 passes the strand 25 of the pile wire 23 through the canvas, the end of this strand 25, which is folded around the hook 16, slides in this hook, while the rest of the wire 23 is immobilized around the nose 2 of the head 1 by the needle 19 which, at this time, has crossed the part 24 of the wire 23. Thus, when the hooks 16, 17 arrive in the position of FIG. 4, the strands 25 and 26 of the pile wire 23 have the same length.

Fig. 5 represents the moment of advance of the mobile assembly of the apparatus where the hook 16 has introduced the strand 25 of the pile wire 23 into the compartment 11 of the loop 8, while the hook 17 is about to introduce the strand 26 of the pile wire 23 in the compartment 10 of this loop. As in the passage through the canvas, the end of the strand 25 of the pile wire 23 was also folded around the hook 16 at the entry into the compartment 11 of the loop 8.

When this folded end of the strand 25 is entirely in the compartment 11, it straightens and leaves the hook 16. As the hook 16 is then behind the hook 17, this strand 25 is located between the hook 16 and the rear side wall of loop 8 and not between the two hooks. When the hook 17 in turn makes the strand 26 of the pile thread enter. compartment 10 of the loop 8 (Fig. 6), this strand cannot therefore come into contact with the strand 25, although it is located between the two hooks. At most, it could rub against the end of the strand 25 still folded around the hook 16, if the loop 8 was not partitioned.

In the position of FIG. 6, the moving team has reached the end of the race. The device is therefore completely engaged in the canvas, at the end of the second time of movement of the device in the direction of the canvas.

It is important that the hook 17, the shortest, is still long enough so that when it reaches the end of its travel, it passes the end of the strand 26 - which folds around this hook at the entrance to the loop 8 - entirely in this loop, so that it straightens up and leaves the hook 17. If the end of the strand 26 remained folded around the hook 17 at the end of its travel, the latter would risk drawing the strand 26 out of the loop 8 by withdrawing.

The partition 9 of the loop 8 prevents any contact between the strands 25 and 26 of the pile wire in the loop. Hair threads, even if not specially treated, are therefore unlikely to become untwisted by rubbing against each other. Furthermore, the friction of the end of the strand 25, folded around the hook 16, and of the strand 26 against the partition 9 is lower than that of these strands against each other.

In the position of FIG. 6, the person using the device according to the invention only has to remove it from the canvas to form a Smyrna point. During a first step of this withdrawal movement, the moving element 13-20 moves back against the button 12 by removing the hooks 16, 17 from the loop 8 and bringing them back to their rest position shown in FIG. 1. At the end of this first stage, the loop 8 is still fully engaged in the canvas with the strands 25 and 26 of the pile wire 23 in its compartments 10, 11, as shown in FIG. 7.

During a second step of the withdrawal movement, the loop 8 is withdrawn from the canvas by carrying with it the two strands 25 and 26 between the two strands of the pair 21 of weft threads. This results in the Ghiordès knot or Smyrna point shown in Fig. 8.

In this last figure, the strands 25 and 26 of the pile wire 23 will constitute the pile of the carpet, when the knotting of the stitches is finished on the canvas considered. As for the middle part 24 of the wire 23, which is wound around the two warp threads of the pair 21, it forms. the node itself. The bristles 24, 25 are thus juxtaposed along the narrow space delimited, on the one hand, by the two strands of weft thread of the pair 21, and, on the other hand, by the adjacent pairs of warp threads (not shown) of the canvas. The middle part 24, for its part, of the pile wire 23, passes over one of the pairs of warp wires delimiting the space in which the bristles 25, 26 are located. FIG. 8 also shows that these bristles 25, 26 are strangled by the strands of the pair 21 of warp threads, which perfectly condemns the knot thus formed.

In summary, the apparatus described makes it possible to form a Smyrna point simply by pushing it fully against the canvas after having placed around its nose 2 a strand of pile wire, previously cut to the desired length, then by removing it completely. of the canvas. Until the loop 8 has passed entirely through the canvas, however, it is necessary to hold the button 12 against the handle 13. Packages of strands of pile threads of different colors, lengths and sizes are on the market.

The second embodiment (Fig. 9 to 13) is more elaborate, therefore somewhat more expensive than the first; but it has the great advantage of exempting the person using it from making a movement and of avoiding the fatigue which it causes. To this end, this second embodiment differs from the first only by the presence of a ball snap, which blocks the moving element along the guide rod. as long as the partitioned loop of the aircraft enters the canvas, but which automatically releases this crew, as soon as the loop is fully engaged in the canvas.

To mount the ball catch on the device according to the invention, the head, the guide rod which is integral with it and the handle of the device must however be slightly modified. Thus, the head has four holes 27 which pass through it parallel to the axis of the device and open into the bottom of the concavity of the end 6 of its nose 2. Four branches 28 of equal lengths of a metal trigger 29 (Fig. 10) pass through the holes 27, in which they can slide freely. Two by two, the branches 28 constitute the legs of a "U" whose rounded base 30 is bent at right angles so as to surround the base of the loop 8 (Fig. 11). At rest (Fig. 9 and 12), the bases 30 are located at a certain distance from the bottom of the concavity of the end 6 of the nose 2. The ends of the branches 28 are fixed to a flat ring 31 which, in the position of Figs. 9 and 12, rest against the head.

For its part, the guide rod 7a has, on the one hand, a diametrical slot 32, of length equal to the stroke of the moving part of the apparatus, and, on the other hand, a notch 33 in the walls in cylindrical surface shape. As for the handle 13a, it has an internal groove 34 and a shoulder 35. It is longer than that of the first embodiment and its upper end is closed.

In addition to the parts, which are also identical to those of the first embodiment, the apparatus according to the second embodiment also comprises a ball 36 housed in the notch 33 and a sleeve 37 adjusted on the guide rod 7a of so that it can slide freely along it. The sleeve 37 has a lateral opening 38 and it is placed under the action of a coil spring 39 which is housed in the handle 13a, around the guide rod 7a, and bears against the shoulder 35 to push the sleeve 37 against head Ia. Finally, a pin 40 is driven through the handle 13a and passes freely through the slot 32 of the guide rod 7a.

In the rest position of FIG. 9, the spring 39 moves the mobile assembly 13-20 away from the head 1a. It presses the pin 40 against the upper end of the slot 32 and the ring 31 against the head 1a via the sleeve 37. In this position, the edges of the opening 38 of the sleeve 37 separate the ball 36 from the bottom of the notch 33 and keep it engaged in the groove 34, which locks the handle 13a to the guide rod 7a and consequently secures the mobile assembly and the head between them.

When the device is pushed by the handle 13a so as to engage its loop 8 between the strands of weft threads of the pair 21, the ball 36, wedged in the groove 34, forces the head 1a and consequently the loop 8 to follow the thrust exerted on the handle 13a.

When the loop 8 is going to be fully engaged in the canvas, the bases 30 of the trigger 29 come into contact with the strands of the pair 21 of weft threads of the canvas. These bases 30 are then pushed against the bottom of the concavity of the end 6 of the nose 2, as shown in FIG. 13. Consequently, the branches 28 move the ring 31 away from the head 1a while pushing the sleeve 37 against the action of the spring 39. During this movement of the sleeve 37, its opening 38 drives the ball 36 to the bottom of the 'notch 33 by leaving it from the groove 34, which has the effect of releasing the handle 13a and therefore the movable assembly of the guide rod 7a therefore the head la. This crew can then move against the head there as was the case in the first embodiment, after releasing the button 12. This advance continues until the pin 40 abuts against the lower end of the slot 32, that is to say until the device is fully engaged in the canvas,

The person using the device shown in Figs. 9 to 13 no longer has to tire of holding a button or worrying about releasing it at the right time. She just has to push the device until it is fully engaged in the canvas, then remove it completely. The ball catch described automatically assumes the maneuver which had to be exerted manually on the button 12 of the first embodiment.

When the device according to the second embodiment is removed from the canvas, the spring 39 naturally returns it to the rest position of FIG. 9.

Claims (8)

1. Apparatus for tying Smyme stitches known as Ghiordes knots on a canvas, comprising, on the one hand, a head (1) which has a nose (2) and two cheeks (3) delimiting two housings (4, 5) between them and said nose, the rear of the head (1) being arranged to receive the middle part (24) of a pile wire (23) of predetermined length, while the parts (25, 26) of this wire, adjacent to this middle part (24), are trapped in said housings (4, 5) so that the ends of this wire extend towards the front of said head in approximately parallel directions, this head being integral with a guide rod (7) and its nose (2) carrying a rigid loop (8) intended to pass between two wires (21) of the canvas during a first movement of engagement of the device and, on the other hand, a mobile assembly (13-17) along said rod (7), between a rest position and an engaged position, this crew carrying two hooks (16, 17) which are located in different planes, parallel to each other and move in these planes, when the said crew passes from its rest position to its engaged position and vice versa, which are guided by said head (1) and which, during an additional engagement movement, leave their rest position, cross the canvas in passing through openings of the latter, located on either side of the two said wires (21) between which the loop (8) of the apparatus has been engaged, and finally intersect in said loop, when they have arrived in the engaged position, these hooks (16, 17) being intended, during their movement, to grip the parts (25, 26) of the pile wire (23) trapped in said housings (4, 5) and, while sliding along this wire towards its ends, passing the ends through said openings of the canvas to finally deposit them in said loop (8), which, during the disengagement of the apparatus, pulls these ends of the pile wire (23) between the two said wires (21) of the canvas,
characterized
in that the parts (16a, 17a) of the hooks (16, 17), which grip the parts of the pile wire (23) trapped in said housings (4, 5), are not at the same distance from these parts hair, so -to enter them one after the other, during the additional engagement movement of the device, -to then pass the ends of this wire (23) successively through the canvas -and engage them one after the other in said loop (8), approaching their engaged position. 2. Apparatus according to claim 1,
characterized
in that the hook (16), which is intended to grip the pile wire (23) in the first place, is arranged in that of the planes of the hooks (16, 17) which is at the rear of the head (1) . 3. Apparatus according to claim 2,
characterized
in that said crew (13-20) also carries a needle (19) whose tip, located on the rear face of the head (1) in the rest position of the device, is intended to sink into the middle part (24) of the pile wire (23) placed on this head, when the first hook (16) to grip this pile wire (23) begins to have to slide along this wire. 4. Apparatus according to claim 3,
characterized
in that the difference between the distances which, at rest, separate the parts (16a, 17a) of the hooks (16, 17), which are intended to grip the parts of the pile wire (23) engaged in the said housings (4 , 5), of these parts of the pile wire is at least equal to the thickness of this wire. 5. Apparatus according to claim 3,
characterized
in that the difference between the distances which, at rest, separate the parts (16a, 17a) of the hooks (16, 17), which are intended to grip the parts of the pile wire (23) engaged in the said housings (4 , 5), of these parts of the pile wire is, at most, limited by the fact that the hook (17) gripping this wire secondly must, in the engaged position, penetrate sufficiently into said loop (8) to make it completely enter the part (26) of the pile wire (23) which it has grasped. 6. Apparatus according to one of claims 1 to 5,
characterized
in that it includes a control stick (13a) integral with said crew (13-20), -a ball snap (33 to 39), which normally locks the handle (13a) and this crew relative to said head (1a) -and a trigger (29) protruding at the end - (6) of said nose (2), at the base of said loop (8), this trigger (29) releasing said snap (33 to 39), when the loop (8) has passed through the canvas and its projecting part (30) comes into contact with the latter. 7. Apparatus according to one of claims 1 to 6, characterized
in that said loop (8) has a longitudinal partition (9), at least approximately in the middle. 8. Apparatus according to one of claims 1 to 7,
characterized
by a projection located at the rear of the head (1) and constituting a baffle intended to prevent the establishment of a pile wire on the wrong side of the device.

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