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EP2883711B1 - Drawing compass with position locking - Google Patents

Drawing compass with position locking Download PDF

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Publication number
EP2883711B1
EP2883711B1 EP14195147.5A EP14195147A EP2883711B1 EP 2883711 B1 EP2883711 B1 EP 2883711B1 EP 14195147 A EP14195147 A EP 14195147A EP 2883711 B1 EP2883711 B1 EP 2883711B1
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EP
European Patent Office
Prior art keywords
lever
clevis
washer
legs
designed
Prior art date
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EP14195147.5A
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German (de)
French (fr)
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EP2883711A1 (en
Inventor
François Aznar
Steven Falcoz
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MAPED SAS
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MAPED SAS
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
    • B43L9/00—Circular curve-drawing or like instruments
    • B43L9/02—Compasses

Definitions

  • the invention relates to the field of technical drawing instruments and school and more particularly drawing compasses.
  • the tightening of the arms of the compass must be sufficiently loose to allow the adjustment of the spacing of the branches of the compass, and must also be sufficiently firm so that the branches do not part during the drawing of an arc.
  • the tightening of the branches is such that, when one begins to trace, one exerts an effort on the tracing mine, so that the branch including this mine tends to deviate from its position, this which has the consequence that the circle drawn is neither precise nor regular.
  • a compass conventionally comprising two branches each having an end housed in a yoke, the branches and the yoke being assembled by means of a screw / nut device.
  • the adjustment of the spacing of the branches is achieved by unscrewing the screw and the locking of the spacing is achieved by screwing the screw, so that the screw bears against a wing of the yoke which itself even crush the end of each branch.
  • This type of locking has the disadvantage of being imprecise since the adjustment of the spacing and the locking position are made by the same means. Indeed, once the gap defined by unscrewing the screw, it makes a screwing of the latter to lock the defined gap.
  • a compass comprising the same conventional elements as those mentioned above and a locking device, wherein a lever is rotatably mounted on an axis parallel to the plane in which the branches extend.
  • This lever comprises at each free end a cam whose function is to exert in a locking position a force on the yoke. More particularly, there is a functional clearance between the cams and the yoke when the lever is in the rest position, which allows to adjust the spacing of the branches conventionally in them. pivoting about their axis of rotation, and when the lever is in the locking position, the cams bear against the yoke and exert a force on said yoke which transmits the force on the end of each branch, thus locking the spacing of branches.
  • this type of locking although effective, requires a large number of parts, which increases the cost of manufacture and complicates the assembly of a compass equipped with such a lock.
  • the object of the invention is to remedy all or some of the aforementioned drawbacks.
  • the invention relates to a drawing compass comprising two branches pivotally mounted about an axis of rotation substantially perpendicular to the plane in which the branches extend, a clevis housing an articulation end of each branch and comprising at least one wing covering the articulation end of each branch, a holding member designed to hold together the branches and the yoke, a locking device comprising a lever, characterized in that the lever is rotatably mounted about the axis of rotation of said branches and is held together by the holding member with the branches and the yoke, the lever being designed to move from a rest position in which the rotational movement of the branches is free, to a locking position in which the position of the branches is blocked by applying a force on the wing of the yoke so that the wing of the yoke forces each end of articulatio n branches housed in the screed.
  • the locking device comprises a lever directly applying a force on the wing of the yoke and said lever is rotatably mounted on the same axis of rotation as the branches
  • the compass is more compact and present. a smaller number of parts compared to the state of the art previously described. Indeed, it is no longer necessary to have an interface between the lever and the yoke to transmit the forces, nor to provide a full articulation for the pivoting of the lever, and all the parts of the compass is maintained by a single holding member.
  • the lever is designed to move from the rest position to the locking position, the change of position of the lever being reversible so that the lever is designed to also move from the locking position to the rest position.
  • the user can reposition the lever in the rest position to store it.
  • the yoke comprises an outer surface on which is provided at least one upward ramp and the lever comprises at least one stud configured to cooperate with said ramp.
  • the yoke comprises an outer surface on which is formed at least one stud and the lever has a ramp on a portion of an outer surface positioned opposite the yoke, the stud and the ramp being configured to cooperate with one another. the other as mentioned previously.
  • two ramps are provided on the outer surface of the yoke, the two ramps being positioned symmetrically about the axis of rotation of the branches.
  • the lever then advantageously comprises two pins, each stud cooperating with one of the two ramps.
  • This configuration makes it possible, in comparison with a single-stud embodiment, to reduce the forces to be applied by each pin on its corresponding ramp.
  • an alternative according to the invention may consist in arranging two pins on the outer surface of the yoke and in positioning two symmetrical ramps on the lever arranged around the axis of rotation of the branches, each pin being configured to cooperate with one of the ramps.
  • the drawing compass comprises a friction cheek interposed between the hinge ends of each branch housed in the screed.
  • the friction cheek comprises a central lumen intended to be traversed by the holding member.
  • the drawing compass further comprises a protective washer fixedly mounted around the axis of rotation of the branches, the washer being designed to be positioned between the lever and the holding member.
  • the washer makes it possible to prevent unscrewing of the holding member by frictional action between the lever and the holding member.
  • the lever comprises an upper gripping portion and a lower actuating portion.
  • the actuating portion comprises a projecting flange shaped to cooperate with a portion of the edge of the washer.
  • a retaining orifice is provided on the yoke and the washer has a protruding portion shaped to cooperate with the retaining orifice.
  • the washer comprises at least one recess on a portion of the periphery of the washer, said recess forming a stop and being designed to limit the movement of the lever cooperating with a portion of the lever.
  • the portion of the lever corresponds to the projecting flange of the operating portion of the lever.
  • the stop is used to position the lever in a stable position of rest or locking.
  • the protection washer comprises an upper recess forming a stop and designed to position the lever in a stable rest position, and a lower recess forming a stop and designed to position the lever in a stable locking position.
  • the yoke and the lever have complementary shapes, which makes it possible to improve the compactness of the compass in the rest position, when the lever is positioned opposite the yoke.
  • the lever and the washer are made in one piece, the lever and the washer being connected to each other by a flexible hinge.
  • This one-piece design saves a room and combines lever function and washer function.
  • the lever is made of filled plastic such as ABS (acrylonitrile butadiene styrene), POM (polyoxymethylene) or a charged polymer such as a polyamide loaded glass ball, and preferably zamak , to improve the strength and wear resistance of the compass.
  • the yoke may also be made of filled plastic such as ABS (acrylonitrile butadiene styrene), POM (polyoxymethylene) or a charged polymer such as a polyamide loaded glass ball.
  • the protective washer may also be made of filled plastic such as ABS (acrylonitrile butadiene styrene), POM (polyoxymethylene) or a charged polymer such as a polyamide loaded glass ball.
  • the drawing compass 1 comprises two branches 2a, 2b hinged and rotatably mounted about an axis of rotation AA substantially perpendicular to the plane in which the branches 2a, 2b extend.
  • the first branch 2a comprises an end equipped with a tracer, and a hinge end provided with a sector-type hinge or disk member (not shown) designed to cooperate in rotation with the complementary hinge member from the other branch 2b.
  • the second branch 2b comprises an end equipped with a tip and articulation end provided with a sector-type articulation member or disc (not shown) designed to cooperate in rotation with the complementary articulation member of the other branch 2a.
  • a friction cheek 3 is interposed between the articulation ends of the branches 2a, 2b.
  • the hinge end of each branch 2a, 2b and the friction cheek 3 are housed in a yoke 4.
  • the yoke 4 comprises a front wing 4a and a rear wing 4b.
  • the yoke 4 comprises lateral recesses allowing the deflection of the branches 2a, 2b.
  • Clevis 4 shown in Figures 6A and 6B , comprises an outer surface in which are formed two ramps 8.
  • the ramps 8 are positioned around a through orifice 11 for receiving a holding member 7, the holding member 7 comprising a screw 7a and a nut 7b.
  • the ramps 8 are symmetrical.
  • the ramps 8 are rising in a direction of rotation, when the lever moves from a rest position to an actuating position.
  • the outer surface of the yoke 4 at the orifice 11 has undergone a countersinking operation forming a housing around the orifice 11 on the rear fender 4b, the housing being designed to receive the nut 7b in order to prevent said nut 7b from protruding from the yoke 4.
  • a retaining orifice 10 is formed on the front flange 4a of the yoke 4.
  • the retaining orifice 10 is designed to cooperate with a protruding portion 6a of a protective washer 6, which will be described later.
  • the branches 2a, 2b, the friction flange 3, the yoke 4 are held together by the holding member 7, which in the example shown is a screw / nut device.
  • the holding member 7 is positioned on the axis of rotation AA, so that the branches 2a, 2b are movable around the holding member 7.
  • the drawing compass 1 comprises a lever 5 pivotally mounted about the axis of rotation AA and held by the holding member 7 as illustrated in FIG. figure 5 .
  • Lever 5 shown in Figures 1 to 5 and more particularly to Figures 7A and 7B , comprises a lower actuating portion 5b and an upper gripping portion 5a.
  • the gripping portion 5a of the lever 5 has a shape complementary to the shape of the yoke 4 for a question of compactness.
  • the grip portion 5a is substantially curved, as illustrated in FIG. Figure 7B .
  • a counterbore has been made on the outer surface of the yoke 4 around the orifice 11 on the front flange 4a of the yoke 4 forming a housing shaped to partially receive the actuating portion 5b of the lever 5.
  • the actuating portion 5b of the lever 5 comprises two pins 9.
  • the pins 9 are designed to cooperate each with one of the ramps 8 formed on the outer surface of the yoke 4.
  • the pins 9 are positioned around the axis of rotation AA .
  • Lever 5 is configured to move from a first position, as illustrated in FIGS. Figures 1 and 2 , to a second position, illustrated in Figures 3 and 4 .
  • the first position is a rest position in which the gripping portion 5a of the lever 5 is positioned facing the yoke 4. In the rest position, the rotation of the branches 2a, 2b is free, that is to say that the branches 2a, 2b are not constrained in a given position. It is in the rest position that one can adjust the spacing of the branches 2a, 2b.
  • the second position is a locking position in which the grip portion 5a has been turned substantially by a quarter of a turn. In the locking position, the position of the branches 2a, 2b is fixed so that, when drawing, the branches 2a, 2b do not deviate further.
  • each pin 9 is positioned on a ramp 8 at the lowest point thereof.
  • each pin 9 moves, in the direction of rotation of the lever 5, along the rising ramp 8 associated therewith.
  • each pin 9 is positioned at the highest point of the ramp 8.
  • the ramps 8 thus constrained allow the progressive tightening of the branches 2a, 2b. Indeed, in the locking position, the pins 9 exert such forces on the ramps 8 that the front wing 4a is forced to come to press against the hinge end of the branches 2a, 2b housed in the yoke 4, blocking thus the two branches 2a, 2b.
  • the wing of the yoke 4 undergoing stress may be the rear wing 4b, it will suffice to reverse the positioning of the components of the compass 1.
  • the compass 1 may comprise a protective washer 6.
  • the protective washer 6 is shown in FIGS. Figures 1 to 5 .
  • the protective washer 6 comprises a protruding portion 6a designed to cooperate with the retaining orifice 10 formed in the yoke 4.
  • the protective washer 6 is fixedly mounted on the axis of rotation AA and is held by the retaining member 7, as visible in figure 5 .
  • the washer 6 comprises an edge shaped to be in contact with a protruding flange of the lever 5, the lever 5 being rotatably mounted about the axis AA, the projection flange of said lever 5 slides on at least a portion of the edge of the washer. 6.
  • the washer 6 comprises a lower recess forming a stop, which stops the rotational movement of the lever 5 in a stable locking position.
  • the washer 6 also comprises an upper recess forming a stop for stopping the rotational movement of the lever 5 in a stable rest position.
  • the washer 6 indexed on the yoke 4 through the retaining orifice 10 prevents a rotating part is in contact with the lever 5 to isolate the holding member 7.
  • the washer 6 protects the lever 5 from wear.
  • the washer 6 insulating the holding member 7 of the lever 5 allows the use of a light brake allowing the adjustments of the holding member 7 with a tool, so that the user adapts the clamping force to its needs.
  • a protective washer 6 is optional.
  • the parts of the compass 1 and in particular the yoke 4, the lever 5 and the protective washer 6 are made of filled plastic.
  • the lever is made of zamak.

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Description

L'invention concerne le domaine des instruments de dessin technique et scolaire et plus particulièrement des compas de dessin.The invention relates to the field of technical drawing instruments and school and more particularly drawing compasses.

Classiquement, le serrage des branches du compas doit être suffisamment lâche pour permettre l'ajustement de l'écartement des branches du compas, et doit être également suffisamment ferme pour ne pas que les branches s'écartent durant le tracé d'un arc de cercle. Or, en général, le serrage des branches est tel que, lorsque l'on commence à tracer, on exerce un effort sur la mine de traçage, de sorte que la branche comprenant cette mine a tendance à s'écarter de sa position, ce qui a pour conséquence que le cercle tracé n'est ni précis ni régulier.Conventionally, the tightening of the arms of the compass must be sufficiently loose to allow the adjustment of the spacing of the branches of the compass, and must also be sufficiently firm so that the branches do not part during the drawing of an arc. . However, in general, the tightening of the branches is such that, when one begins to trace, one exerts an effort on the tracing mine, so that the branch including this mine tends to deviate from its position, this which has the consequence that the circle drawn is neither precise nor regular.

Il existe de nombreux moyens pour permettre de verrouiller la position des branches l'une par rapport à l'autre pour que, lors d'un traçage, les branches conservent un écartement déterminé.There are many ways to allow to lock the position of the branches relative to each other so that, during a tracing, the branches maintain a determined spacing.

On connait du document GB10452 , un compas comprenant classiquement deux branches comportant chacune une extrémité logée dans une chape, les branches et la chape étant assemblées au moyen d'un dispositif vis/écrou. L'ajustement de l'écartement des branches est réalisé par le dévissage de la vis et le verrouillage de l'écartement est réalisé par le vissage de la vis, de sorte que la vis vienne en appui contre une aile de la chape qui elle-même écrase l'extrémité de chaque branche. Ce type de verrouillage présente l'inconvénient d'être peu précis puisque l'ajustement de l'écartement et le blocage en position sont réalisés par le même moyen. En effet, une fois l'écartement défini par dévissage de la vis, on réalise un vissage de cette dernière pour verrouiller l'écartement défini. Or, cette opération est délicate puisqu'elle entraîne souvent la perte de l'ajustement de la position. En outre, il existe un risque non négligeable de perte de la vis de verrouillage et de maintien, car si on la dévisse complètement, cette dernière peut se détacher du compas et désolidariser l'ensemble des pièces.We know of the document GB10452 , a compass conventionally comprising two branches each having an end housed in a yoke, the branches and the yoke being assembled by means of a screw / nut device. The adjustment of the spacing of the branches is achieved by unscrewing the screw and the locking of the spacing is achieved by screwing the screw, so that the screw bears against a wing of the yoke which itself even crush the end of each branch. This type of locking has the disadvantage of being imprecise since the adjustment of the spacing and the locking position are made by the same means. Indeed, once the gap defined by unscrewing the screw, it makes a screwing of the latter to lock the defined gap. However, this operation is delicate since it often leads to the loss of the adjustment of the position. In addition, there is a significant risk of loss of the locking screw and maintenance, because if it is unscrewed completely, the latter can detach from the compass and separate all parts.

On connait également du document EP1609621 , un compas comprenant les mêmes éléments classiques que ceux mentionnés ci-dessus et un dispositif de verrouillage, dans lequel un levier est monté en rotation sur un axe parallèle au plan dans lequel les branches s'étendent. Ce levier comporte à chaque extrémité libre une came qui a pour fonction d'exercer dans une position de verrouillage un effort sur la chape. Plus particulièrement, il existe un jeu fonctionnel entre les cames et la chape lorsque le levier est en position de repos, ce qui permet d'ajuster l'écartement des branches classiquement en les faisant pivoter autour de leur axe de rotation, et lorsque le levier est en position de verrouillage, les cames viennent en appui contre la chape et exercent un effort sur ladite chape qui transmet l'effort sur l'extrémité de chaque branche, verrouillant ainsi l'écartement des branches. Cependant, ce type de verrouillage, bien qu'efficace, nécessite un nombre important de pièces, ce qui augmente le coût de la fabrication et qui complexifie l'assemblage d'un compas équipé d'un tel verrouillage.We also know of the document EP1609621 , a compass comprising the same conventional elements as those mentioned above and a locking device, wherein a lever is rotatably mounted on an axis parallel to the plane in which the branches extend. This lever comprises at each free end a cam whose function is to exert in a locking position a force on the yoke. More particularly, there is a functional clearance between the cams and the yoke when the lever is in the rest position, which allows to adjust the spacing of the branches conventionally in them. pivoting about their axis of rotation, and when the lever is in the locking position, the cams bear against the yoke and exert a force on said yoke which transmits the force on the end of each branch, thus locking the spacing of branches. However, this type of locking, although effective, requires a large number of parts, which increases the cost of manufacture and complicates the assembly of a compass equipped with such a lock.

L'invention a pour but de remédier à tout ou partie des inconvénients précités.The object of the invention is to remedy all or some of the aforementioned drawbacks.

L'invention a pour objet un compas de dessin comprenant deux branches montées pivotantes autour d'un axe de rotation sensiblement perpendiculaire au plan dans lequel les branches s'étendent, une chape logeant une extrémité d'articulation de chaque branche et comprenant au moins une aile couvrant l'extrémité d'articulation de chaque branche, un organe de maintien conçu pour maintenir assemblées les branches et la chape, un dispositif de verrouillage comportant un levier, caractérisé en ce que le levier est monté en rotation autour de l'axe de rotation desdites branches et est maintenu assemblé par l'organe de maintien avec les branches et la chape, le levier étant conçu pour passer d'une position de repos dans laquelle le mouvement de rotation des branches est libre, à une position de verrouillage dans laquelle la position des branches est bloquée par application d'un effort sur l'aile de la chape de sorte que l'aile de la chape contraint chaque extrémité d'articulation des branches logée dans la chape.The invention relates to a drawing compass comprising two branches pivotally mounted about an axis of rotation substantially perpendicular to the plane in which the branches extend, a clevis housing an articulation end of each branch and comprising at least one wing covering the articulation end of each branch, a holding member designed to hold together the branches and the yoke, a locking device comprising a lever, characterized in that the lever is rotatably mounted about the axis of rotation of said branches and is held together by the holding member with the branches and the yoke, the lever being designed to move from a rest position in which the rotational movement of the branches is free, to a locking position in which the position of the branches is blocked by applying a force on the wing of the yoke so that the wing of the yoke forces each end of articulatio n branches housed in the screed.

Ainsi, comme le dispositif de verrouillage selon l'invention comprend un levier appliquant directement un effort sur l'aile de la chape et que ledit levier est monté en rotation sur le même axe de rotation que les branches, le compas est plus compact et présente un nombre de pièces moindre par rapport à l'état de la technique précédemment décrit. En effet, il n'est plus nécessaire d'avoir une interface entre le levier et la chape pour transmettre les efforts, ni de fournir une articulation à part entière pour le pivotement du levier, et l'ensemble des pièces du compas est maintenu par un unique organe de maintien.Thus, as the locking device according to the invention comprises a lever directly applying a force on the wing of the yoke and said lever is rotatably mounted on the same axis of rotation as the branches, the compass is more compact and present. a smaller number of parts compared to the state of the art previously described. Indeed, it is no longer necessary to have an interface between the lever and the yoke to transmit the forces, nor to provide a full articulation for the pivoting of the lever, and all the parts of the compass is maintained by a single holding member.

De plus, comme le dispositif de verrouillage est différent de l'organe de maintien des pièces du compas, on ne risque pas de perdre de pièces en position de déverrouillage.In addition, since the locking device is different from the member for holding the parts of the compass, there is no risk of losing parts in the unlocked position.

Selon une autre caractéristique de l'invention, le levier est conçu pour passer de la position de repos vers la position de verrouillage, le changement de position du levier étant réversible de sorte que le levier est conçu pour passer également de la position de verrouillage vers la position de repos. Ainsi, par simple abaissement ou en variante par simple relèvement du levier, la position des branches est bloquée et l'écartement de ces dernières est préservé lors du tracé et il est possible de réaliser plusieurs cercles ou arcs de cercle de rayon identique. Cette action est aisément réalisable par exemple avec l'index lors de la prise de mesure d'un rayon sur une règle.According to another characteristic of the invention, the lever is designed to move from the rest position to the locking position, the change of position of the lever being reversible so that the lever is designed to also move from the locking position to the rest position. Thus, simply by lowering or alternatively by simply raising the lever, the position of the branches is blocked and the spacing of the latter is preserved during the drawing and it is possible to make several circles or arcs of identical radius. This action is easily achievable for example with the index when measuring a ray on a rule.

Une fois le tracé réalisé, l'utilisateur peut positionner à nouveau le levier en position de repos pour le ranger.Once the plot is made, the user can reposition the lever in the rest position to store it.

Selon une caractéristique de l'invention, la chape comprend une surface extérieure sur laquelle est ménagée au moins une rampe ascendante et le levier comporte au moins un téton configuré pour coopérer avec ladite rampe. Ainsi, lorsque le levier passe de la position de repos à la position de verrouillage, le téton va se déplacer dans le sens de rotation du levier sur la rampe ascendante, ce qui fera progressivement augmenter les efforts de serrage appliqués sur la chape et les branches.According to a feature of the invention, the yoke comprises an outer surface on which is provided at least one upward ramp and the lever comprises at least one stud configured to cooperate with said ramp. Thus, when the lever moves from the rest position to the locking position, the pin will move in the direction of rotation of the lever on the ascending ramp, which will gradually increase the clamping forces applied to the yoke and branches .

Alternativement, la chape comprend une surface extérieure sur laquelle est ménagé au moins un téton et le levier comporte une rampe sur une partie d'une surface extérieure positionnée en regard de la chape, le téton et la rampe étant configurés pour coopérer l'un avec l'autre comme évoqué précédemment.Alternatively, the yoke comprises an outer surface on which is formed at least one stud and the lever has a ramp on a portion of an outer surface positioned opposite the yoke, the stud and the ramp being configured to cooperate with one another. the other as mentioned previously.

Selon une autre caractéristique de l'invention, deux rampes sont ménagées sur la surface extérieure de la chape, les deux rampes étant positionnées symétriquement autour de l'axe de rotation des branches. Le levier comprend alors avantageusement deux tétons, chaque téton coopérant avec l'une des deux rampes. Cette configuration permet, en comparaison avec une réalisation à téton unique, de réduire les efforts devant être appliqués par chaque téton sur sa rampe correspondante. Bien entendu, et comme dit précédemment, une alternative selon l'invention peut consister à disposer deux tétons sur la surface extérieure de la chape et à positionner deux rampes symétriques sur le levier agencées autour de l'axe de rotation des branches, chaque téton étant configuré pour coopérer avec une des rampes.According to another characteristic of the invention, two ramps are provided on the outer surface of the yoke, the two ramps being positioned symmetrically about the axis of rotation of the branches. The lever then advantageously comprises two pins, each stud cooperating with one of the two ramps. This configuration makes it possible, in comparison with a single-stud embodiment, to reduce the forces to be applied by each pin on its corresponding ramp. Of course, and as said above, an alternative according to the invention may consist in arranging two pins on the outer surface of the yoke and in positioning two symmetrical ramps on the lever arranged around the axis of rotation of the branches, each pin being configured to cooperate with one of the ramps.

Selon une autre caractéristique de l'invention, le compas de dessin comprend une joue de friction intercalée entre les extrémités d'articulation de chaque branche logées dans la chape. Avantageusement, la joue de friction comporte une lumière centrale destinée à être traversée par l'organe de maintien. Ainsi, le serrage s'applique à la fois sur les branches et la chape mais également sur la joue de friction.According to another characteristic of the invention, the drawing compass comprises a friction cheek interposed between the hinge ends of each branch housed in the screed. Advantageously, the friction cheek comprises a central lumen intended to be traversed by the holding member. Thus, the clamping applies to both the branches and the clevis but also to the friction cheek.

Selon une autre caractéristique de l'invention, le compas de dessin comprend en outre une rondelle de protection montée fixe autour de l'axe de rotation des branches, la rondelle étant conçue pour être positionnée entre le levier et l'organe de maintien. Avantageusement, la rondelle permet d'empêcher le dévissage de l'organe de maintien par action de frottement entre le levier et l'organe de maintien.According to another characteristic of the invention, the drawing compass further comprises a protective washer fixedly mounted around the axis of rotation of the branches, the washer being designed to be positioned between the lever and the holding member. Advantageously, the washer makes it possible to prevent unscrewing of the holding member by frictional action between the lever and the holding member.

Selon une autre caractéristique de l'invention, le levier comprend une portion supérieure de préhension et une portion inférieure d'actionnement. Avantageusement la portion d'actionnement comprend un rebord saillant conformé pour coopérer avec une partie du bord de la rondelle.According to another characteristic of the invention, the lever comprises an upper gripping portion and a lower actuating portion. Advantageously the actuating portion comprises a projecting flange shaped to cooperate with a portion of the edge of the washer.

Selon une autre caractéristique de l'invention, un orifice de retenue est ménagé sur la chape et la rondelle comporte une portion saillante conformée pour coopérer avec l'orifice de retenue. Préférentiellement, la rondelle comprend au moins un décrochement sur une portion de la périphérie de la rondelle, ledit décrochement formant butée et étant conçu pour limiter le déplacement du levier en coopérant avec une partie du levier. De préférence, la partie du levier correspond au rebord saillant de la portion d'actionnement du levier. La butée permet de positionner le levier dans une position stable de repos ou de verrouillage.According to another characteristic of the invention, a retaining orifice is provided on the yoke and the washer has a protruding portion shaped to cooperate with the retaining orifice. Preferably, the washer comprises at least one recess on a portion of the periphery of the washer, said recess forming a stop and being designed to limit the movement of the lever cooperating with a portion of the lever. Preferably, the portion of the lever corresponds to the projecting flange of the operating portion of the lever. The stop is used to position the lever in a stable position of rest or locking.

De manière préférentielle, la rondelle de protection comprend un décrochement supérieur formant butée et conçu pour positionner le levier en position de repos stable, et un décrochement inférieur formant butée et conçu pour positionner le levier en position de verrouillage stable.Preferably, the protection washer comprises an upper recess forming a stop and designed to position the lever in a stable rest position, and a lower recess forming a stop and designed to position the lever in a stable locking position.

Avantageusement, la chape et le levier présentent des formes complémentaires, ce qui permet d'améliorer la compacité du compas en position de repos, lorsque le levier est positionné en regard de la chape.Advantageously, the yoke and the lever have complementary shapes, which makes it possible to improve the compactness of the compass in the rest position, when the lever is positioned opposite the yoke.

Selon une autre caractéristique de l'invention, le levier et la rondelle sont réalisés d'un seul tenant, le levier et la rondelle étant reliés l'un à l'autre par une charnière souple. Cette réalisation en une seule pièce permet d'économiser une pièce et de réunir la fonction de levier et la fonction de rondelle.According to another characteristic of the invention, the lever and the washer are made in one piece, the lever and the washer being connected to each other by a flexible hinge. This one-piece design saves a room and combines lever function and washer function.

Selon une autre caractéristique de l'invention, le levier est réalisé en plastique chargé tel que l'ABS (acrylonitrile butadiène styrène), POM (polyoxyméthylène) ou un polymère chargé tel qu'un polyamide chargé bille de verre, et de préférence en zamak, pour améliorer la solidité et la résistance à l'usure du compas. En outre, la chape peut être également réalisée en plastique chargé tel que l'ABS (acrylonitrile butadiène styrène), POM (polyoxyméthylène) ou un polymère chargé tel qu'un polyamide chargé bille de verre. De plus, la rondelle de protection peut être également réalisée en plastique chargé tel que l'ABS (acrylonitrile butadiène styrène), POM (polyoxyméthylène) ou un polymère chargé tel qu'un polyamide chargé bille de verre.According to another characteristic of the invention, the lever is made of filled plastic such as ABS (acrylonitrile butadiene styrene), POM (polyoxymethylene) or a charged polymer such as a polyamide loaded glass ball, and preferably zamak , to improve the strength and wear resistance of the compass. In addition, the yoke may also be made of filled plastic such as ABS (acrylonitrile butadiene styrene), POM (polyoxymethylene) or a charged polymer such as a polyamide loaded glass ball. In addition, the protective washer may also be made of filled plastic such as ABS (acrylonitrile butadiene styrene), POM (polyoxymethylene) or a charged polymer such as a polyamide loaded glass ball.

L'invention sera mieux comprise, grâce à la description ci-après, qui se rapporte à un mode de réalisation selon la présente invention, donné à titre d'exemple non limitatif et expliqué avec référence aux dessins schématiques annexés, dans lesquels:

  • la figure 1 représente une vue de face du compas de dessin selon l'invention en position de repos,
  • la figure 2 représente une vue en coupe longitudinale selon un axe X-X du compas représenté en figure 1,
  • la figure 3 est une vue de face du compas de dessin selon l'invention en position de verrouillage,
  • la figure 4 représente une vue en coupe longitudinale selon un axe X-X du compas représenté en figure 3,
  • la figure 5 est une vue éclatée d'un assemblage partiel du compas selon l'invention,
  • la figure 6A est une vue de face de la chape du compas selon l'invention,
  • la figure 6B est une vue de côté de la chape représentée en figure 6A,
  • la figure 7A est une vue arrière du levier du compas selon l'invention, et,
  • la figure 7B est une vue de côté du levier représenté en figure 7A.
The invention will be better understood, thanks to the following description, which relates to an embodiment according to the present invention, given by way of non-limiting example and explained with reference to the appended diagrammatic drawings, in which:
  • the figure 1 represents a front view of the drawing compass according to the invention in the rest position,
  • the figure 2 represents a longitudinal sectional view along an axis XX of the compass shown in FIG. figure 1 ,
  • the figure 3 is a front view of the drawing compass according to the invention in the locking position,
  • the figure 4 represents a longitudinal sectional view along an axis XX of the compass shown in FIG. figure 3 ,
  • the figure 5 is an exploded view of a partial assembly of the compass according to the invention,
  • the Figure 6A is a front view of the clevis of the compass according to the invention,
  • the Figure 6B is a side view of the clevis shown in Figure 6A ,
  • the Figure 7A is a rear view of the lever of the compass according to the invention, and,
  • the Figure 7B is a side view of the lever shown in Figure 7A .

Le compas de dessin 1 selon l'invention comprend deux branches 2a, 2b articulées et montées en rotation selon un axe de rotation A-A sensiblement perpendiculaire au plan dans lequel les branches 2a, 2b s'étendent. La première branche 2a comprend une extrémité équipée d'une mine traçante, et une extrémité d'articulation pourvue d'un organe d'articulation de type secteur ou disque (non représenté) conçu pour coopérer en rotation avec l'organe d'articulation complémentaire de l'autre branche 2b. La deuxième branche 2b comprend une extrémité équipée d'une pointe et extrémité d'articulation pourvue d'un organe d'articulation de type secteur ou disque (non représenté) conçu pour coopérer en rotation avec l'organe d'articulation complémentaire de l'autre branche 2a.The drawing compass 1 according to the invention comprises two branches 2a, 2b hinged and rotatably mounted about an axis of rotation AA substantially perpendicular to the plane in which the branches 2a, 2b extend. The first branch 2a comprises an end equipped with a tracer, and a hinge end provided with a sector-type hinge or disk member (not shown) designed to cooperate in rotation with the complementary hinge member from the other branch 2b. The second branch 2b comprises an end equipped with a tip and articulation end provided with a sector-type articulation member or disc (not shown) designed to cooperate in rotation with the complementary articulation member of the other branch 2a.

Comme on peut le voir aux figures 2 et 4, une joue de friction 3 est intercalée entre les extrémités d'articulation des branches 2a, 2b. L'extrémité d'articulation de chaque branche 2a, 2b et la joue de friction 3 sont logées dans une chape 4. La chape 4 comprend une aile avant 4a et une aile arrière 4b. La chape 4 comprend des évidements latéraux permettant le débattement des branches 2a, 2b.As can be seen at figures 2 and 4 , a friction cheek 3 is interposed between the articulation ends of the branches 2a, 2b. The hinge end of each branch 2a, 2b and the friction cheek 3 are housed in a yoke 4. The yoke 4 comprises a front wing 4a and a rear wing 4b. The yoke 4 comprises lateral recesses allowing the deflection of the branches 2a, 2b.

La chape 4, représentée aux figures 6A et 6B, comprend une surface extérieure dans laquelle sont ménagées deux rampes 8. Les rampes 8 sont positionnées autour d'un orifice 11 traversant destiné à recevoir un organe de maintien 7, l'organe de maintien 7 comprenant une vis 7a et un écrou 7b. Les rampes 8 sont symétriques. Les rampes 8 sont montantes selon un sens de rotation, lorsque le levier passe d'une position de repos à une position d'actionnement.Clevis 4, shown in Figures 6A and 6B , comprises an outer surface in which are formed two ramps 8. The ramps 8 are positioned around a through orifice 11 for receiving a holding member 7, the holding member 7 comprising a screw 7a and a nut 7b. The ramps 8 are symmetrical. The ramps 8 are rising in a direction of rotation, when the lever moves from a rest position to an actuating position.

Avantageusement, la surface extérieure de la chape 4 au niveau de l'orifice 11 a subi une opération de lamage formant un logement autour de l'orifice 11 sur l'aile arrière 4b, le logement étant conçu pour recevoir l'écrou 7b afin d'éviter que ledit écrou 7b ne saille par rapport à la chape 4.Advantageously, the outer surface of the yoke 4 at the orifice 11 has undergone a countersinking operation forming a housing around the orifice 11 on the rear fender 4b, the housing being designed to receive the nut 7b in order to prevent said nut 7b from protruding from the yoke 4.

Dans l'exemple illustré aux figures 6A et 6B, un orifice de retenue 10 est ménagé sur l'aile avant 4a de la chape 4. L'orifice de retenue 10 est conçu pour coopérer avec une portion saillante 6a d'une rondelle de protection 6, qui sera décrite par la suite.In the example shown in Figures 6A and 6B , a retaining orifice 10 is formed on the front flange 4a of the yoke 4. The retaining orifice 10 is designed to cooperate with a protruding portion 6a of a protective washer 6, which will be described later.

Comme visible à la figure 5, les branches 2a, 2b, la joue de friction 3, la chape 4 sont maintenues assemblées par l'organe de maintien 7, qui dans l'exemple illustré est un dispositif vis/écrou. L'organe de maintien 7 est positionné sur l'axe de rotation A-A, de sorte que les branches 2a, 2b sont mobiles autour de l'organe de maintien 7.As visible at figure 5 , the branches 2a, 2b, the friction flange 3, the yoke 4 are held together by the holding member 7, which in the example shown is a screw / nut device. The holding member 7 is positioned on the axis of rotation AA, so that the branches 2a, 2b are movable around the holding member 7.

Selon l'invention, le compas de dessin 1 comprend un levier 5 monté pivotant autour de l'axe de rotation A-A et maintenu par l'organe de maintien 7 comme illustré en figure 5.According to the invention, the drawing compass 1 comprises a lever 5 pivotally mounted about the axis of rotation AA and held by the holding member 7 as illustrated in FIG. figure 5 .

Le levier 5, illustré aux figures 1 à 5 et plus particulièrement aux figures 7A et 7B, comprend une portion inférieure d'actionnement 5b et une portion supérieure de préhension 5a. La portion de préhension 5a du levier 5 présente une forme complémentaire à la forme de la chape 4 pour une question de compacité. Préférentiellement, la portion de préhension 5a est sensiblement courbée, comme illustré en figure 7B.Lever 5, shown in Figures 1 to 5 and more particularly to Figures 7A and 7B , comprises a lower actuating portion 5b and an upper gripping portion 5a. The gripping portion 5a of the lever 5 has a shape complementary to the shape of the yoke 4 for a question of compactness. Preferably, the grip portion 5a is substantially curved, as illustrated in FIG. Figure 7B .

De plus, un lamage a été réalisé sur la surface extérieure de la chape 4 autour de l'orifice 11 sur l'aile avant 4a de la chape 4 formant un logement conformé pour recevoir en partie la portion d'actionnement 5b du levier 5. La portion d'actionnement 5b du levier 5 comprend deux tétons 9. Les tétons 9 sont conçus pour coopérer chacun avec une des rampes 8 ménagées sur la surface extérieure de la chape 4. Les tétons 9 sont positionnés autour de l'axe de rotation A-A.In addition, a counterbore has been made on the outer surface of the yoke 4 around the orifice 11 on the front flange 4a of the yoke 4 forming a housing shaped to partially receive the actuating portion 5b of the lever 5. The actuating portion 5b of the lever 5 comprises two pins 9. The pins 9 are designed to cooperate each with one of the ramps 8 formed on the outer surface of the yoke 4. The pins 9 are positioned around the axis of rotation AA .

Le levier 5 est configuré pour se mouvoir d'une première position, illustrée aux figures 1 et 2, vers une deuxième position, illustrée aux figures 3 et 4.Lever 5 is configured to move from a first position, as illustrated in FIGS. Figures 1 and 2 , to a second position, illustrated in Figures 3 and 4 .

La première position est une position de repos dans laquelle la portion de préhension 5a du levier 5 est positionnée en regard de la chape 4. En position de repos, la rotation des branches 2a, 2b est libre, c'est-à-dire que les branches 2a, 2b ne sont pas contraintes dans une position déterminée. C'est en position de repos que l'on peut ajuster l'écartement des branches 2a, 2b. La deuxième position est une position de verrouillage dans laquelle la portion de préhension 5a a été tournée sensiblement d'un quart de tour. En position de verrouillage, la position des branches 2a, 2b est figée de manière à ce que, lors du tracé, les branches 2a, 2b ne s'écartent pas d'avantage.The first position is a rest position in which the gripping portion 5a of the lever 5 is positioned facing the yoke 4. In the rest position, the rotation of the branches 2a, 2b is free, that is to say that the branches 2a, 2b are not constrained in a given position. It is in the rest position that one can adjust the spacing of the branches 2a, 2b. The second position is a locking position in which the grip portion 5a has been turned substantially by a quarter of a turn. In the locking position, the position of the branches 2a, 2b is fixed so that, when drawing, the branches 2a, 2b do not deviate further.

Le verrouillage des branches 2a, 2b est réalisé par la coopération des tétons 9 avec les rampes 8.The locking of the branches 2a, 2b is achieved by the cooperation of the pins 9 with the ramps 8.

En effet, en position de repos, les tétons 9 sont positionnés chacun sur une rampe 8 au point le plus bas de celle-ci. Lorsque le levier 5 est actionné, chaque téton 9 se déplace, dans le sens de rotation du levier 5, le long de la rampe 8 montante qui lui est associée. Une fois le levier 5 en position de verrouillage, chaque téton 9 est positionné au point le plus haut de la rampe 8.Indeed, in the rest position, the pins 9 are each positioned on a ramp 8 at the lowest point thereof. When the lever 5 is actuated, each pin 9 moves, in the direction of rotation of the lever 5, along the rising ramp 8 associated therewith. Once the lever 5 in the locking position, each pin 9 is positioned at the highest point of the ramp 8.

Les rampes 8 ainsi contraintes permettent le serrage progressif des branches 2a, 2b. En effet, en position de verrouillage, les tétons 9 exercent de tels efforts sur les rampes 8 que l'aile avant 4a est contrainte à venir se plaquer contre l'extrémité d'articulation des branches 2a, 2b logée dans la chape 4, bloquant ainsi les deux branches 2a, 2b. Bien entendu, en alternative, l'aile de la chape 4 subissant la contrainte peut être l'aile arrière 4b, il suffira d'inverser le positionnement des composants du compas 1.The ramps 8 thus constrained allow the progressive tightening of the branches 2a, 2b. Indeed, in the locking position, the pins 9 exert such forces on the ramps 8 that the front wing 4a is forced to come to press against the hinge end of the branches 2a, 2b housed in the yoke 4, blocking thus the two branches 2a, 2b. Of course, alternatively, the wing of the yoke 4 undergoing stress may be the rear wing 4b, it will suffice to reverse the positioning of the components of the compass 1.

Selon l'invention, le compas 1 peut comprendre une rondelle de protection 6. La rondelle de protection 6 est représentée aux figures 1 à 5. La rondelle de protection 6 comprend une portion saillante 6a conçue pour coopérer avec l'orifice de retenue 10 ménagé dans la chape 4. La rondelle de protection 6 est montée fixe sur l'axe de rotation A-A et est maintenue par l'organe de maintien 7, comme visible en figure 5. La rondelle 6 comprend un bord conformé pour être en contact avec un rebord saillant du levier 5, le levier 5 étant monté en rotation autour de l'axe A-A, le rebord saillant dudit levier 5 coulisse sur au moins une partie du bord de la rondelle 6.According to the invention, the compass 1 may comprise a protective washer 6. The protective washer 6 is shown in FIGS. Figures 1 to 5 . The protective washer 6 comprises a protruding portion 6a designed to cooperate with the retaining orifice 10 formed in the yoke 4. The protective washer 6 is fixedly mounted on the axis of rotation AA and is held by the retaining member 7, as visible in figure 5 . The washer 6 comprises an edge shaped to be in contact with a protruding flange of the lever 5, the lever 5 being rotatably mounted about the axis AA, the projection flange of said lever 5 slides on at least a portion of the edge of the washer. 6.

Comme visible en figure 5, la rondelle 6 comprend un décrochement inférieur formant butée, ce qui permet d'arrêter le mouvement de rotation du levier 5 dans une position de verrouillage stable. En outre, la rondelle 6 comprend également un décrochement supérieur formant butée permettant d'arrêter le mouvement de rotation du levier 5 dans une position de repos stable.As visible in figure 5 , the washer 6 comprises a lower recess forming a stop, which stops the rotational movement of the lever 5 in a stable locking position. In addition, the washer 6 also comprises an upper recess forming a stop for stopping the rotational movement of the lever 5 in a stable rest position.

Avantageusement, la rondelle 6 indexée sur la chape 4 grâce à l'orifice de retenue 10 évite qu'une pièce en rotation soit en contact avec le levier 5 pour isoler l'organe de maintien 7. Ainsi, on élimine les actions de frottement. De plus, la rondelle 6 permet de protéger le levier 5 de l'usure. En outre, La rondelle 6 isolant l'organe de maintien 7 du levier 5 permet l'utilisation d'un frein léger autorisant les réglages de l'organe de maintien 7 avec un outil, pour que l'utilisateur adapte la force de serrage à ses besoins.Advantageously, the washer 6 indexed on the yoke 4 through the retaining orifice 10 prevents a rotating part is in contact with the lever 5 to isolate the holding member 7. Thus, it eliminates the friction actions. In addition, the washer 6 protects the lever 5 from wear. In addition, the washer 6 insulating the holding member 7 of the lever 5 allows the use of a light brake allowing the adjustments of the holding member 7 with a tool, so that the user adapts the clamping force to its needs.

Il est à noter que, selon l'invention, l'utilisation d'une rondelle de protection 6 est optionnelle.It should be noted that, according to the invention, the use of a protective washer 6 is optional.

Dans l'exemple illustré aux figures 1 à 7B, les pièces du compas 1 et notamment la chape 4, le levier 5 et la rondelle de protection 6 sont réalisés en plastique chargé. Préférentiellement, le levier est réalisé en zamak. Bien entendu, selon l'invention, on peut utiliser des plastiques non chargés pour ces pièces.In the example shown in Figures 1 to 7B , the parts of the compass 1 and in particular the yoke 4, the lever 5 and the protective washer 6 are made of filled plastic. Preferably, the lever is made of zamak. Of course, according to the invention, it is possible to use uncharged plastics for these parts.

Bien entendu, l'invention n'est pas limitée au mode de réalisation décrit et représenté aux figures annexées. Des modifications restent possibles, notamment du point de vue de la constitution des divers éléments ou par substitution d'équivalents techniques, sans sortir pour autant du domaine de protection de l'invention.Of course, the invention is not limited to the embodiment described and shown in the accompanying figures. Modifications are possible, particularly from the point of view of the constitution of the various elements or by substitution of technical equivalents, without departing from the scope of protection of the invention.

Claims (9)

  1. Drafting compasses (1) comprising two legs (2a, 2b) that are mounted in a pivotable manner about an axis of rotation (A-A) substantially perpendicular to the plane in which the legs (2a, 2b) extend, a clevis (4) accommodating an articulated end of each leg (2a, 2b) and comprising at least one wing (4a, 4b) covering the articulated end of each leg (2a, 2b), a holding member (7) designed to keep the legs (2a, 2b) and the clevis (4) in the assembled state, a locking device having a lever (5), characterized in that the lever (5) is mounted so as to rotate about the axis of rotation (A-A) of said legs (2a, 2b) and is kept in the assembled state with the legs (2a, 2b) and the clevis (4) by the holding member (7), the lever (5) being designed to pass from a rest position, in which the rotational movement of the legs (2a, 2b) is free, to a locking position, in which the position of the legs (2a, 2b) is locked by application of a force to the wing (4a, 4b) of the clevis (4) such that the wing (4a, 4b) of the clevis (4) constrains each articulated end of the legs (2a, 2b) accommodated in the clevis (4), characterized in that:
    - the clevis (4) comprises an outer surface on which at least one ascending ramp (8) is formed, and the lever (5) has at least one stud (9) configured to cooperate with said ramp (8), the stud (9) moving in the direction of rotation of the lever on the ascending ramp when the lever passes from the rest position to the locking position, or
    - the clevis comprises an outer surface on which at least one stud is formed, and the lever has a ramp on a part of an outer surface that is positioned facing the clevis.
  2. Drafting compasses according to the preceding claim, characterized in that two ramps (8) are formed on the outer surface of the clevis (4), the two ramps (8) being positioned symmetrically about the axis of rotation (A-A) of the legs (2a, 2b), and in that the lever (5) comprises two studs (9), each stud (9) cooperating with a corresponding ramp (8).
  3. Drafting compasses according to either one of the preceding claims, characterized in that the drafting compasses (1) comprise a friction flange (3) interposed between the articulated ends of each leg (2a, 2b) accommodated in the clevis (4).
  4. Drafting compasses according to any one of the preceding claims, characterized in that the drafting compasses (1) also comprise a protective washer (6) mounted in a fixed manner about the axis of rotation (A-A) of the legs (2a, 2b), the washer (6) being designed to be positioned between the lever (5) and the holding member (7).
  5. Drafting compasses according to the preceding claim, characterized in that a retaining orifice (10) is formed in the clevis (4), and in that the washer (6) has a protruding portion (6a) designed to cooperate with the retaining orifice (10).
  6. Drafting compasses according to either one of Claims 4 and 5, characterized in that the washer (6) comprises at least one indentation (12) on a portion of the periphery of the washer (6), said indentation (12) forming a stop and being designed to limit the movement of the lever (5) by cooperating with a part of the lever (5).
  7. Compasses according to one of Claims 4 to 6, characterized in that the lever comprises an upper gripping portion (5a) and a lower actuating portion (5b), the actuating portion (5b) comprising a protruding lip designed to cooperate with a part of an edge of the washer (6).
  8. Compasses according to one of Claims 4 to 7, characterized in that the lever (5) and the washer (6) are made in one piece, the lever (5) and the washer (6) being connected together by a flexible hinge.
  9. Drafting compasses according to any one of the preceding claims, characterized in that the lever (5) is designed to pass from the rest position to the locking position, the change in position of the lever (5) being reversible such that the lever (5) is designed to also pass from the locking position to the rest position.
EP14195147.5A 2013-12-11 2014-11-27 Drawing compass with position locking Active EP2883711B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1362432A FR3014360B1 (en) 2013-12-11 2013-12-11 DRAWING COMPASS WITH LOCKING POSITION

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EP2883711A1 EP2883711A1 (en) 2015-06-17
EP2883711B1 true EP2883711B1 (en) 2019-10-30

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EP14195147.5A Active EP2883711B1 (en) 2013-12-11 2014-11-27 Drawing compass with position locking

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EP (1) EP2883711B1 (en)
CN (1) CN204547480U (en)
FR (1) FR3014360B1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3047442A1 (en) 2016-02-05 2017-08-11 Safetool DRAWING COMPASS WITH LATCH
FR3077029B1 (en) * 2018-01-24 2020-01-24 Maped DRAWING COMPASS
CN113085416B (en) * 2018-10-27 2022-09-23 山东汇融电子设备有限公司 Compasses for drawing and use method
TWI715452B (en) * 2019-11-01 2021-01-01 順德工業股份有限公司 Compass

Family Cites Families (4)

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Publication number Priority date Publication date Assignee Title
GB190910452A (en) 1909-05-03 1910-05-03 Charles Edward Hand Improvements in Compasses or Dividers.
CH352146A (en) * 1957-06-19 1961-02-15 Willi Robert Circle
US3886664A (en) * 1974-05-01 1975-06-03 Frederick J Coil Extensible beam compass
FR2871730B1 (en) * 2004-06-21 2007-09-14 Maped Soc Par Actions Simplifi DRAWING COMPASS WITH LOCKING MEANS FOR THE SPACING OF ITS BRANCHES

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
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FR3014360B1 (en) 2015-12-04
EP2883711A1 (en) 2015-06-17
CN204547480U (en) 2015-08-12
FR3014360A1 (en) 2015-06-12

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