EP0046830A1 - Precision compass with articulated legs and rigid cross-bar - Google Patents

Precision compass with articulated legs and rigid cross-bar Download PDF

Info

Publication number
EP0046830A1
EP0046830A1 EP80401223A EP80401223A EP0046830A1 EP 0046830 A1 EP0046830 A1 EP 0046830A1 EP 80401223 A EP80401223 A EP 80401223A EP 80401223 A EP80401223 A EP 80401223A EP 0046830 A1 EP0046830 A1 EP 0046830A1
Authority
EP
European Patent Office
Prior art keywords
bar
break
compass
articulation
precision
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP80401223A
Other languages
German (de)
French (fr)
Other versions
EP0046830B1 (en
Inventor
Jean Bras
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bras Jean
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to AT80401223T priority Critical patent/ATE16574T1/en
Priority to EP80401223A priority patent/EP0046830B1/en
Priority to DE8080401223T priority patent/DE3071252D1/en
Publication of EP0046830A1 publication Critical patent/EP0046830A1/en
Application granted granted Critical
Publication of EP0046830B1 publication Critical patent/EP0046830B1/en
Expired legal-status Critical Current

Links

Images

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
    • B43L9/16—Features common to compasses, dividers, and callipers
    • 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
    • B43L9/025—Compasses with parallel legs

Definitions

  • the present invention relates to a precision compass with parallel breaks and a stiffness bar.
  • Precision compasses are known which have stiffness bars joining the two branches and located closer to the head than broken pieces.
  • This bar cooperates with mechanisms for adjusting the tracing radius and for blocking the branches.
  • Compasses with double branches are also known which are assembled in a deformable parallelogram ensuring the parallelism of the breaks.
  • compasses comprising two parallel breaks each articulated to a branch and joined by a stiffness bar capable of sliding in at least one of the breaks and being blocked in both.
  • stiffness bar is located below the points of articulation of broken branches and therefore is subject to compressive bending stress increasing the risk of buckling.
  • the object of the present invention is to eliminate the above-mentioned drawbacks by implementing a compass of increased precision and of easy use.
  • the compass according to the invention of the type comprising two parallel breaks joined by a stiffness bar is essentially characterized in that it comprises a rapid locking and unlocking means acting simultaneously on the rotation of the breaks, the transverse deviations and the translational movement of the sliding bar in one of the broken pieces and by the fact that the distance of the articulation axes of the broken pieces to the bearing axis is a function of this guide length of the rod to avoid bracing during opening maneuvers.
  • the stiffness rod cooperating with the breaks is placed between their axis of articulation and the head of the compass to eliminate the tendency to buckling of the bar by substitution of a bending tensile stress for a compression bending stress.
  • the precision compass comprises a head 1 in which are articulated two branches 2 each provided at the lower end with a point of articulation of a broken tracer holder 3 or tip holder 4 joined together. to the other by a stiffness bar 5.
  • the head 1 is constituted by a cap in which the two branches 2 are mounted, cooperating with each other by means of at least two toothed sectors 6 which mesh with each other.
  • the solid branches 2 are provided at the end with a groove 7 in which the non-toothed part of the sector is housed.
  • This groove oriented in the plane of the compass as well as the toothed sector are provided with a transverse orifice receiving a means of articulation of the said branch at the head 1.
  • this means consists of a cylindrical axis B terminated at each of its ends by a spherical cap partially engaged in orifices provided in the chappe.
  • the hinge means consists of two balls 9 each mounted in the branch on either side of the groove and each engaging partially in the orifice of the sector and in the 'orifice of the chappe ".
  • each toothed sector consists of several blades 10 obtained by cutting and then assembled by a rivet 11 with an end, for example conical, to constitute an axis of articulation without play from the branch to the head yoke.
  • the non-toothed portion of the sectors engages and is fixed in an orifice formed in the strip 2 or engages and is fixed in a branch made up of a tubular element.
  • the rivet 11 comprises two riveting bases 12 enclosing the blades 10.
  • the ends of the rivet are each engaged in a blind orifice of complementary shape, for example conical, formed in a yoke 13 mounted in the yoke of the head and fixed to the latter by the button 1 A for maneuvering the compass.
  • a blind orifice of complementary shape for example conical
  • the branches 2 can be made from a long, metal element full of cross-section, for example polygonal, or from a tubular element as shown in FIG. 1, which in no way affects the rigidity of the compass while lightening.
  • the branches 2 are telescopic and are constituted by a tubular element containing 2A and a contained tubular element 2B capable of sliding without play in the previous one and of being blocked therein.
  • the containing element 2A is preferably articulated to the head 1 and the contained element 2B is provided at the end with one of the broken pieces.
  • the elements 2A and 2B for example rectangular consist of tubular metal profiles of polygonal cross section or obtained by cutting and bending a metal plate.
  • each of the elements of each branch has a longitudinal slit allowing an expansion of the element contained in the containing element and a retraction of the element containing on the contained element thanks to their natural elasticity which eliminates the play guidance.
  • the slot 14 of the element 2B and the slot 15 of the element 2A are arranged in the plane of the compass and are arranged in opposition.
  • the slot-14 of the element 2B is disposed on the outside of the compass along its plane to allow the engagement of the locking means in said element.
  • This blocking means of the element 2A with respect to the element 2B is for example constituted by a screw 16 whose square head is engaged in the element. 2B ' and ' whose threaded rod is engaged in the slot 14 and in an orifice formed in the element 2A.
  • the head of the screw is in the form of an inverted truncated cone and is housed in an orifice of complementary shape formed in a part 17 mounted in the element 2B.
  • the width of this part is substantially equal to or greater than the internal width of the element 2B so that, when tightening by means of a nut 18, this contributes to ensuring the expansion of said element 2B in the element 2A which eliminates any play and provides the branch with good rigidity.
  • element 2B has a section equal to that of element 2A to limit the penetration of one into the other.
  • the lower end of the branches 2 or of the elements 2B receives a means of blocking and articulation of the broken pieces.
  • This means consists of a screw 19 engaged in an orifice of the branch and of the break and receiving a locking nut.
  • the lower end of the branches or of the element 2B is shaped as an elastic yoke of relatively large length to receive one of the broken pieces and the screw 19, under the action of the tightening nut the blanks of the yoke are brought together and enclose the upper end of the corresponding break to ensure angular and axial locking.
  • the stiffness bar 5 which undergoes during tracing a tensile bending stress and not a compression bending stress prejudicial to the accuracy of the layout which is the case in the compasses of the prior art.
  • the stiffness bar for example of cylindrical shape, made of metal is perpendicular to each of the broken pieces.
  • This bar is fixed by one of its ends to one of the broken pieces and is capable of sliding and of being fixed in the other.
  • the bar 5 is provided at one of its ends with a male thread so as to be screwed into a threaded orifice formed in the breakage of the plotter door 3.
  • the tip-holder break 4 is provided above its articulation axis with a cylindrical orifice in which the bar 5 can slide.
  • This orifice is axially extended by a guide bearing 20 of the bar 1.
  • the length of the guide bearing is calculated by taking into account the mechanical laws governing the bracing to avoid the angular phenomenon of the branches.
  • the length of the guide portion will be a few centimeters.
  • the guide portion and the break 4 are part of a single piece, but one can provide as shown in Figures 7 and 8 a guide portion attached to the break.
  • the guide portion is provided with a diametral slot at its cylindrical and longitudinal orifice capable of being deformed by the action of the clamping and articulation means to block the bar 1 in translation.
  • the screw of the clamping and articulation means of the break 4 is engaged in a cylindrical orifice formed under the orifice of the guide bearing and opening into the diametrical slot, this screw advantageously receives a butterfly nut 21 or with manual blocking to facilitate hbcage or unblocking.
  • the blocking of the bar 5 is ensured automatically by a system of the type with elastic deformation.
  • break 4 and the guide bearing are split above their longitudinal axis.
  • the split end of the break has an orifice for the passage of an articulation and locking means to the arm 2.
  • This means is advantageously constituted by a screw 23 serving as an axis of articulation for the break 4 which, using a lever 24, will block the bar 1 and the articulation.
  • the lever 24 is provided at one of its ends with an orifice for the passage of the screw, the diameter of said orifice being however less than the diameter of the head which abuts against said lever.
  • the lower end of the lever has a boss centered on the axis of the screw to form a fulcrum.
  • an elastic member for example a spring 25 with an angled leaf, and blocked by one of its ends in an orifice formed in the branch 2.
  • this spring is to move the lever away from the branch 2 and will cause, using the screw, the bringing together of the split parts of the crack and therefore the elastic deformation of the guide portion which will pinch the bar 1.
  • the guide portion is related to the break and is provided at the end with diametric slots to form a clamp.
  • This clamp is threaded to cooperate with a means for blocking the bar 5 independent of the means for blocking the break relative to the branch.
  • This locking means is constituted by a threaded button 26 for screwing at the end of the guide portion and comprising a conical zone intended to come into contact with the clamp for locking 7 against the bar 1 ..
  • the bar 5 is blocked by a button 27 cooperating with a clamp 28 in which the said bar slides.
  • the clamp 28 is slidably mounted in an orifice in the break 4 and has a thread cooperating with a tapping of the button 27.
  • the button 27 comes to bear against the breakage and exerts a traction on the clamp which comes into abutment in its orifice and blocks
  • the crack 4 is provided with a means for micrometric adjustment of the tracing radius.
  • the break 4 is provided with a slotted end extended downwards by a blade 29 carrying known means in itself for blocking a point 30 (FIG. 7)
  • the break has an axial threaded orifice with a biconical orifice formed in the blade 29 of the break.
  • the micrometric adjustment means is constituted by a screw 31 engaging in the tapped hole of the break
  • This screw is terminated by a biconical stud 32 which cooperates with a biconical orifice of the blade.
  • the rotation in one direction or the other of the adjusting screw causes the tip 30 to move towards or away.
  • the fine adjustment of the tracing radius is obtained by a slight rotation of a tip-holder part 33 articulated to the break 4 by an axis 34.
  • This part 33 is provided with an orifice passage of a rod, partly threaded, terminated by a stud, for example a conical pin for centering said rod on the break 4.
  • the break 4 is possible from a cylindrical orifice which is axial to the rod receiving an elastic member, for example a spring 35 which cooperates with the tip-carrying part.
  • This elastic member is arranged around the rod and rests on the break 4 and the piece carries the tip and tends to separate the said piece from the tip of the break.
  • the screwing or unscrewing of the nut 35 will cause the tip-holder part 33 to rotate about its axis 34.
  • the slight rotation of the tip-holder part or the approximation or the distance of the branch from the breakage is caused by the action of a threaded screw with differential pitch cooperating respectively with said door part - point and with the break 4.
  • the tip-holder part is in the form of a U 37, between the wings of which the tip of the compass is disposed.
  • This part is housed and articulated by an axis 38 in a longitudinal groove formed in the break.
  • the natural elasticity of the part 36 causes the spacing of each of its wings in the groove which eliminates the play.
  • the heel of the toe piece is disposed outside the groove and cooperates with an elastic member such as a leaf spring 39 wound around the axis 38 and also cooperating with the break.
  • the tip-holder part tends to pivot around the axis 38.
  • This action is designed rebalanc t e e 'by an actuator constituted by a screw and nut.
  • the tip of the compass is locked in the part 36 by a screw and nut with a conical head pressing the said tip against the heel which prevents pinching of the wings.
  • the plotter holder break 3 is provided with a threaded rod for fixing the supports of the plotter members such as a lead and an ink plotter.
  • the ink plotter support is permanently fixed to the break by a knurled button with lock nut screwed both on the threaded rod.
  • This rod is extended downwards by an externally threaded hollow part shaped as a gripper end to receive a lead.
  • This clamp cooperates with a conventional locking device. This arrangement makes it possible to trace with the aid of the mine without being obliged to dismantle the support of the ink tracing member.
  • the present invention makes it possible to produce a compass of great precision and great ease of use by grouping the organs with economy of gestures.

Abstract

1. Precision type compass comprising two legs (2) each one accommodating at its lower end a hinged attachment, these said attachments (3) (4) are held automatically parallel by means of a stiffener bar (5) which interconnects the said attachments and is slide-fitted in a guide bearing (20) of one of the attachments (3) (4), characterized in that each of the legs is equipped with a flexible yoke in which is hinged the corresponding attachment, in that attachment (4) and guide bearing of bar (5) are provided with a slot longitudinal to the through hole of bar (5), in that the hinge and attachment device (19) of attachment (4) traverses the said slots and that the blocking of these slots also blocks bar (5) in lateral direction and blocks hinge movement of attachments (3) (4) with respect to corresponding legs (2).

Description

La présente invention a pour objet un compas de précision à brisures parallèles et à barre de rigidité.The present invention relates to a precision compass with parallel breaks and a stiffness bar.

On connaît des compas de précision dotés de barres de rigidité réunissant les deux branches et situées plus près de la tête que des brisures.Precision compasses are known which have stiffness bars joining the two branches and located closer to the head than broken pieces.

Cette barre coopère avec des mécanismes de réglage du rayon de traçage et de blocage des branches.This bar cooperates with mechanisms for adjusting the tracing radius and for blocking the branches.

On connaît également des compas à double branche assemblées en parallélogramme déformable assurant le parallèlisme des brisures.Compasses with double branches are also known which are assembled in a deformable parallelogram ensuring the parallelism of the breaks.

Pour obtenir un tracé rapide et précis à l'aide de ces appareils il faut une grande habileté du fait de l'éloignement des moyens de réglage des brisures.To obtain a fast and precise route using these devices, great skill is required due to the distance from the means for adjusting the broken lines.

De plus ces instruments ont une ouverture réduite et manquent de rigidité ce qui nuit à la qualité du traçage.In addition, these instruments have a reduced opening and lack rigidity which affects the quality of the tracing.

On connaît aussi des compas comportant deux brisures parallèles articulées chacune à une branche et réunies par une barre de rigidité susceptible de coulisser dans au moins une des brisures et d'être bloquée dans les deux.There are also known compasses comprising two parallel breaks each articulated to a branch and joined by a stiffness bar capable of sliding in at least one of the breaks and being blocked in both.

Habituellement la barre de rigidité est située en dessous des points d'articulation des brisures aux branches et de ce fait est soumise à une contrainte de flexion compression accentuant les risques de flambage.Usually the stiffness bar is located below the points of articulation of broken branches and therefore is subject to compressive bending stress increasing the risk of buckling.

Cet inconvénient est éliminé en augmentant la section de la barre de rigidité ce qui accroît le poids et le coût de fabrication de l'ensemble.This drawback is eliminated by increasing the cross-section of the stiffness bar, which increases the weight and the manufacturing cost of the assembly.

En outre,le jeu de fonctionnement dans les axes d'articulation des brisures ne permet pas de conferer au compas une bonne rigidité angulaire et transversale necessaire pour un traçage précis.In addition, the operating clearance in the axes of articulation of the broken pieces does not make it possible to confer on the compass a good angular and transverse rigidity necessary for a precise tracing.

On a observé également une tendance à l'àrc-boutement de la barre de rigidité lors de son coulissement dans son palier résultant d'une mauvaise définition des caractéristiques dimension- nelles du dit palier.There has also been a tendency for the stiffening bar to buckle when it slides in its bearing, resulting from a poor definition of the characteristics dimension- nelles of said level.

La présente invention a pour objet de supprimer les inconvénients énoncés, ci-dessus en mettant en oeuvre un compas de précision accrue et d'utilisation aisée.The object of the present invention is to eliminate the above-mentioned drawbacks by implementing a compass of increased precision and of easy use.

Un autre but de la présente invention est la mise en oeuvre d'un compas ayant une bonne rigidité angulaire et transversale et non sujet aux phénomènes d'arc-boutement de la barre de rigidité. A cet effet, le compas selon l'invention du type comportant deux brisures parallèles réunies par une barre de rigidité se caractérise essentiellement en ce qu'il comporte un moyen de blocage et de déblocage rapide agissant simultanément sur la rotation des brisures, les déviations transversales et le mouvement de translation de la barre coulissant dans une des brisures et par le fait que la distance des axes d'articulation des brisures à l'axe du palier est fonction de cette longueur de guidage de la tige pour éviter l'arc-boutement au cours des manoeuvres d'ouvertures.Another object of the present invention is the implementation of a compass having good angular and transverse rigidity and not subject to the phenomena of bracing of the stiffness bar. To this end, the compass according to the invention of the type comprising two parallel breaks joined by a stiffness bar is essentially characterized in that it comprises a rapid locking and unlocking means acting simultaneously on the rotation of the breaks, the transverse deviations and the translational movement of the sliding bar in one of the broken pieces and by the fact that the distance of the articulation axes of the broken pieces to the bearing axis is a function of this guide length of the rod to avoid bracing during opening maneuvers.

Selon une autre caractéristique de l'invention, la tige de rigidité coopérant avec les brisures est placée entre leur axe d'articulation et la tête du compas pour éliminer la tendance au flambage de la barre par substitution d'une contrainte de traction flexion à une contrainte de flexion compression.According to another characteristic of the invention, the stiffness rod cooperating with the breaks is placed between their axis of articulation and the head of the compass to eliminate the tendency to buckling of the bar by substitution of a bending tensile stress for a compression bending stress.

D'autres avantages et caractéristiques de l'invention apparaîtront lors de la lecture d'une forme préférentielle de réalisation avec références aux dessins annexés en lesquels :

  • - La figure 1 est une vue en plan d'un compas suivant l'invention.
  • - Les figures 2, 3, et 4 sont des vues des différentes formes de réalisation de la tête du compas.
  • - La figure 5 est une vue en coupe suivant la ligne AA de la figure 4.
  • - La figure 6 est une vue d'une autre forme de réalisation d'un moyen de blocage de la barre et de la brisure par rapport à la branche.
  • - Les figures 7 et B sont des vues en coupe d'autres formes de réalisation du moyen de blocage de la barre par rapport à la brisure et des systèmes de réglage.
Other advantages and characteristics of the invention will appear on reading a preferred embodiment with reference to the appended drawings in which:
  • - Figure 1 is a plan view of a compass according to the invention.
  • - Figures 2, 3, and 4 are views of the various embodiments of the head of the compass.
  • - Figure 5 is a sectional view along line AA of Figure 4.
  • - Figure 6 is a view of another embodiment of a locking means of the bar and the break relative to the branch.
  • - Figures 7 and B are sectional views of other embodiments of the bar blocking means with respect to the breakage and adjustment systems.

Tel que représenté le compas de précision selon l'invention comprend une tête 1 dans laquelle sont articulées deux.branches 2 pourvues chacune en extrémité inférieure d'un point d'articulation d'une brisure porte traceur 3 ou porte pointe 4 réunies l'une à l'autre par une barre de rigidité 5.As shown, the precision compass according to the invention comprises a head 1 in which are articulated two branches 2 each provided at the lower end with a point of articulation of a broken tracer holder 3 or tip holder 4 joined together. to the other by a stiffness bar 5.

La tête 1 est constituée par une chappe dans laquelle sont montées les deux branches 2 coopérant l'une avec l'autre par l'intermédiaire d'au moins deux secteurs dentés 6 s'éngrenant l'un avec l'autre.The head 1 is constituted by a cap in which the two branches 2 are mounted, cooperating with each other by means of at least two toothed sectors 6 which mesh with each other.

e Selon une première forme de réalisation comme représenté en figure 2 les branches 2 pleines sont pourvues en extrémité d'une rainure 7 dans laquelle se loge la partie non dentée du secteur. Cette rainure orientée dans le plan du compas ainsi que le secteur denté sont dotés d' un orifice transversal recevant un moyen d'articulation de la dite branche à la tête 1.e According to a first embodiment as shown in FIG. 2, the solid branches 2 are provided at the end with a groove 7 in which the non-toothed part of the sector is housed. This groove oriented in the plane of the compass as well as the toothed sector are provided with a transverse orifice receiving a means of articulation of the said branch at the head 1.

Selon un premier exemple de réalisation (figure 2) ce moyen est constitué par un axe B cylindrique terminé à chacune de ses extrémités par une calotte sphérique partiellement engagée dans des orifices ménagés dans la chappe.According to a first exemplary embodiment (FIG. 2), this means consists of a cylindrical axis B terminated at each of its ends by a spherical cap partially engaged in orifices provided in the chappe.

Selon un autre exemple de réalisation (Figure 3) le moyen d'articulation est constitué par deux billes 9 montées chacune dans la branche de part et d'autre de la rainure et s'engageant chacune partiellement dans l'orifice du secteur et dans l'orifice de la chappe".According to another embodiment (Figure 3) the hinge means consists of two balls 9 each mounted in the branch on either side of the groove and each engaging partially in the orifice of the sector and in the 'orifice of the chappe ".

Ces moyens d'articulation sont maintenus en position par serrage d'une vis de la chappe qui tend à rapprocher chacune de ses ailes. Pour assurer le maintien du secteur denté dans sa branche et pour réaliser un assemblage sanp jeu l'orifice du dit secteur se trouve décalé eu.montage par rapport à l'orifice de la branche en sorte que lors de l'engagement du moyen d'articulation le secteur denté soit plaqué contre le fond de la rainure. En outre, pour supprimer tout jeu entre chaque branche et son moyen d'articulation celui-ci est monté en force ou riveté.These articulation means are held in position by tightening a screw of the clevis which tends to bring each of its wings closer. To maintain the toothed sector in its branch and to perform a sanp clearance assembly the orifice of said sector is offset eu.montage relative to the orifice of the branch so that when engaging the means of joint the toothed sector is pressed against the bottom of the groove. In addition, to remove any play between each branch and its means of articulation it is mounted in force or riveted.

Selon une autre forma de réalisation comme représentée en figures 4 et 5 chaque secteur denté est constitué de plusieurs lames 10 obtenues par découpage et ensuite assemblées par un rivet 11 à bout par exemple conique pour constituer axe d'articulation sans jeu de la branche à la chape de la tête.According to another embodiment as shown in FIGS. 4 and 5, each toothed sector consists of several blades 10 obtained by cutting and then assembled by a rivet 11 with an end, for example conical, to constitute an axis of articulation without play from the branch to the head yoke.

Selon cette forme de réalisation la portion non dentée des secteurs s'engage et est fixée dans un orifice ménagé dans la bande 2 ou s'engage et est fixée dans une branche constituée d'un élément tubulaire.According to this embodiment, the non-toothed portion of the sectors engages and is fixed in an orifice formed in the strip 2 or engages and is fixed in a branch made up of a tubular element.

Selon cette forme de réalisation, le rivet 11 comporte deux embases de rivetages 12 enserrant les lames 10.According to this embodiment, the rivet 11 comprises two riveting bases 12 enclosing the blades 10.

Les extrémités du rivet sont engagées chacune dans un orifice borgne de forme complémentaire par exemple conique ménagé dans une chape 13 montée dans la chape de la tête et fixée à celle-ci par le bouton 1 A de manoeuvre du compas.The ends of the rivet are each engaged in a blind orifice of complementary shape, for example conical, formed in a yoke 13 mounted in the yoke of the head and fixed to the latter by the button 1 A for maneuvering the compass.

Les branches 2 peuvent être réalisées à partir d'un élément longiligne métallique plein de section transversale par exemple polygonale ou à partir d'un élément tubulaire comme représenté en figure 1 ce qui ne nuit en aucun cas à la rigidité du compas tout en l'allègeant.The branches 2 can be made from a long, metal element full of cross-section, for example polygonal, or from a tubular element as shown in FIG. 1, which in no way affects the rigidity of the compass while lightening.

Préférentiellement comme on peut le voir à l'examen de la figure 1 les branches 2 sont télescopiques et sont constituées par un élément tubulaire contenant 2A et un élément tubulaire contenu 2B susceptible de coulisser sans jeu dans le précédent et de s'y bloquer.Preferably, as can be seen on examining FIG. 1, the branches 2 are telescopic and are constituted by a tubular element containing 2A and a contained tubular element 2B capable of sliding without play in the previous one and of being blocked therein.

L'élément contenant 2A est de préférence articulé à la tête 1 et l'élément contenu 2B est pourvu en extrémité d'une des brisures.The containing element 2A is preferably articulated to the head 1 and the contained element 2B is provided at the end with one of the broken pieces.

De préférence les éléments 2A et 2B par exemple rectangulaires sont constitués par des profilés tubulaires en métal de section transversale polygonale ou obtenus par découpage et cambrage d'une plaque métallique.Preferably the elements 2A and 2B, for example rectangular consist of tubular metal profiles of polygonal cross section or obtained by cutting and bending a metal plate.

Pour supprimer le jeu chacun des éléments de chaque branche présente une fente longitudinale permettant une expansion de l'élément contenu dans l'élément contenant et une rétraction de l'élément contenant sur l'élément contenu grâce à leur élasticité naturelle ce qui supprime le jeu au guidage.To remove the play each of the elements of each branch has a longitudinal slit allowing an expansion of the element contained in the containing element and a retraction of the element containing on the contained element thanks to their natural elasticity which eliminates the play guidance.

Lorsque l'on considère une section transversale de la branche (coupe CC) la fente 14 de l'élément 2B et la fente 15 de l'élément 2A sont disposées dans le plan du compas et sont disposées en opposition.When considering a cross section of the branch (section CC) the slot 14 of the element 2B and the slot 15 of the element 2A are arranged in the plane of the compass and are arranged in opposition.

Avantageusement, la fente-14 de l'élément 2B est disposée du côté extérieur au compas suivant son plan pour permettre l'engagement du moyen de blocage dans le dit élément.Advantageously, the slot-14 of the element 2B is disposed on the outside of the compass along its plane to allow the engagement of the locking means in said element.

Ce moyen de blocage de l'élément 2A par rapport à l'élément 2B est par exemple constitué par une vis 16 dont la tête de forme carrée est engagée dans l'élément.2B'et' dont la tige filetée est engagée dans la fente 14 et dans un orifice ménagé dans l'élément 2A.This blocking means of the element 2A with respect to the element 2B is for example constituted by a screw 16 whose square head is engaged in the element. 2B ' and ' whose threaded rod is engaged in the slot 14 and in an orifice formed in the element 2A.

Selon une autre variante de réalisation, la tête de la vis se présente sous la forme d'un tronc de cône inversé et vient se loger dans un orifice de forme complémentaire ménagé dans une pièce 17 montée dans l'élément 2B.According to another alternative embodiment, the head of the screw is in the form of an inverted truncated cone and is housed in an orifice of complementary shape formed in a part 17 mounted in the element 2B.

La largeur de cette pièce est sensiblement égale ou supérieure à.la largeur intérieure de l'élément 2B en sorte que lors du serrage au moyen d'un écrou 18 celle-ci contribue à assurer l'expansion du dit élément 2B dans l'élément 2A ce qui supprime tout jeu et assure à la branche une bonne rigidité.The width of this part is substantially equal to or greater than the internal width of the element 2B so that, when tightening by means of a nut 18, this contributes to ensuring the expansion of said element 2B in the element 2A which eliminates any play and provides the branch with good rigidity.

Dans aa partie inférieure l'élément 2B présente une section égale à celle de l'élément 2A pour limiter la pénétration de l'un dans l'autre.In aa lower part, element 2B has a section equal to that of element 2A to limit the penetration of one into the other.

L'extrémité inférieure des branches 2 ou des éléments 2B reçoit un moyen de blocage et d'articulation des brisures.The lower end of the branches 2 or of the elements 2B receives a means of blocking and articulation of the broken pieces.

Ce moyen est constitué par une vis 19 engagée dans un orifice de la branche et de la.brisure et recevant un écrou de blocage.This means consists of a screw 19 engaged in an orifice of the branch and of the break and receiving a locking nut.

Selon une forme préférentielle de réalisation comme représentée en figure 1, l'extrémité inférieure des branches ou de l'élément 2B est conformée en chape élastique de longueur relativement importante pour recevoir une des brisures et la vis 19, Sous l'action de l'ecrou de serrage les flans de la chape sont rapprochés l'un de l'autre et viennent enserrer l'extrémité supérieure de la brisure correspondante pour assurer un blocage angulaire et axial. Au dessus du point d'articulation des branches 2 est située la barre de rigidité 5 qui subit lors du traçage une contrainte de flexion traction et non une contrainte de flexion compression préjudiciable à la précision du tracé ce qui est le cas dans les compas de l'art antérieur.According to a preferred embodiment as shown in FIG. 1, the lower end of the branches or of the element 2B is shaped as an elastic yoke of relatively large length to receive one of the broken pieces and the screw 19, under the action of the tightening nut the blanks of the yoke are brought together and enclose the upper end of the corresponding break to ensure angular and axial locking. Above the articulation point of the branches 2 is located the stiffness bar 5 which undergoes during tracing a tensile bending stress and not a compression bending stress prejudicial to the accuracy of the layout which is the case in the compasses of the prior art.

La barre de rigidité par exemple de forme cylindrique, en métal est perpendiculaire à chacune des brisures.The stiffness bar, for example of cylindrical shape, made of metal is perpendicular to each of the broken pieces.

Cette barre est fixée par l'une de ses extrémité sur l'une des brisures et est susceptible de coulisser et de se fixer dans l' autre.This bar is fixed by one of its ends to one of the broken pieces and is capable of sliding and of being fixed in the other.

Comme on le comprend quelle que soit/ position angulaire des branches 2 cette disposition permet d'assurer le parallèlisme automatique des brisures entre elles.As can be understood, whatever the angular position of the branches 2, this arrangement makes it possible to ensure automatic parallelism of the breaks between them.

Selon une forme préférée de réalisation comme représentée en figure 1, la barre 5 est dotée à une de ses extrémités d'un filetage male pour venir se visser dans un orifice taraudé ménagé dans la brisure porte traceur 3.According to a preferred embodiment as shown in FIG. 1, the bar 5 is provided at one of its ends with a male thread so as to be screwed into a threaded orifice formed in the breakage of the plotter door 3.

La brisure porte-pointe 4 est pourvue au dessus de son axe d'articulation d'un orifice cylindrique dans lequel peut coulisser la barre 5.The tip-holder break 4 is provided above its articulation axis with a cylindrical orifice in which the bar 5 can slide.

Cet orifice est axialement prolongé par un palier de guidage 20 de la barre 1.This orifice is axially extended by a guide bearing 20 of the bar 1.

La longueur du palier de guidage est calculée en tenant compte des lois mécaniques régissant l'arc-boutement pour éviter le phénomène angulaire des branches.The length of the guide bearing is calculated by taking into account the mechanical laws governing the bracing to avoid the angular phenomenon of the branches.

Pour un écart de quelques millimètres la longueur de la portion de guidage sera de quelques centimètres.For a deviation of a few millimeters, the length of the guide portion will be a few centimeters.

Dans l'exemple de réalisation représenté la portion de guidage et la brisure 4 font partie d'unepseule pièce, mais on pourra prévoir comme représenté en figures 7 et 8 une portion de guidage rapportée sur la brisure.In the embodiment shown the guide portion and the break 4 are part of a single piece, but one can provide as shown in Figures 7 and 8 a guide portion attached to the break.

La portion de guidage est dotée d'une fente diamétrale à son orifice cylindrique et longitudinale susceptible de se déformer par l'action du moyen de serrage et d'articulation pour venir bloquer la barre 1 en translation.The guide portion is provided with a diametral slot at its cylindrical and longitudinal orifice capable of being deformed by the action of the clamping and articulation means to block the bar 1 in translation.

La vis du moyen de serrage et d'articulation de la brisure 4 est engagée dans-un orifice cylindrique ménagé sous l'orifice du pallier de guidage et débouchant dans la fente diamétrale, cette vis avantageusement reçoit un écrou 21 à papillon ou à blocage manuel pour faciliter le hbcage ou le déblocage.The screw of the clamping and articulation means of the break 4 is engaged in a cylindrical orifice formed under the orifice of the guide bearing and opening into the diametrical slot, this screw advantageously receives a butterfly nut 21 or with manual blocking to facilitate hbcage or unblocking.

Le fait de bloquer la barre, en translation conjointement au blocage des brisures par rapport aux branches permet une immobilisation des branches et confère au compas une bonne rigidité angulaire et transversale necessaire à un traçage précis.The fact of blocking the bar, in translation together with the blocking of the breaks relative to the branches allows immobilization of the branches and gives the compass a good angular and transverse rigidity necessary for precise tracing.

Suivant une autre forme de réalisation comme représentée en figure 6, le blocage de la barre 5 est assuré automatiquement par un système du type à déformation élastique.According to another embodiment as shown in FIG. 6, the blocking of the bar 5 is ensured automatically by a system of the type with elastic deformation.

A cet effet, la brisure 4 et le palier de guidage sont fendus au dessus de leur axe longitudinal.To this end, the break 4 and the guide bearing are split above their longitudinal axis.

L'extrémité fendue de la brisure est dotée d'un orifice de passage d'un moyen d'articulation et de blocage au bras 2.The split end of the break has an orifice for the passage of an articulation and locking means to the arm 2.

Ce moyen est avantageusement constitué par une vis 23 servant d'axe d'articulation à la brisure 4 qui à l'aide d'un levier 24 va assurer le blocage de la barre 1 et de l'articulation.This means is advantageously constituted by a screw 23 serving as an axis of articulation for the break 4 which, using a lever 24, will block the bar 1 and the articulation.

Le levier 24 est doté à une de ses extrémités d'un orifice de passage de la vis, le diamètre du dit orifice étant cependant inférieur au diamètre de la tête qui vient en butée contre le dit levier.The lever 24 is provided at one of its ends with an orifice for the passage of the screw, the diameter of said orifice being however less than the diameter of the head which abuts against said lever.

L'extrémité basse du levier comporte un bossage centré à l'axe de la vis pour constituer un point d'appui.The lower end of the lever has a boss centered on the axis of the screw to form a fulcrum.

Entre le levier et la branche 2 est disposé un organe élastique par exemple un ressort 25 à lame coudé, et bloqué par une de ses extrémités dans un orifice ménagé dans la branche 2.Between the lever and the branch 2 is disposed an elastic member, for example a spring 25 with an angled leaf, and blocked by one of its ends in an orifice formed in the branch 2.

Ce ressort a pour but d'éloigner le levier de la-branche 2 et va provoquer à l'aide de la vis le rapprochement des parties fendues de la brissure et par conséquent la déformation élastique de la portion de guidage qui pincera la barre 1.The purpose of this spring is to move the lever away from the branch 2 and will cause, using the screw, the bringing together of the split parts of the crack and therefore the elastic deformation of the guide portion which will pinch the bar 1.

Par compression du ressort 25 comme on le comprend aisément la barre se trouve libérée et peut coulisser dans la portion de guidage.By compression of the spring 25 as can easily be understood, the bar is released and can slide in the guide portion.

Selon une autre forme de réalisation comme représentée en figure 7 la portion de guidage est rapportée à la brisure et est dotée en extrémité de fentes diamétrales pour constituer une pince. Cette pince est filetée pour coopérer avec un moyen de blocage de la barre 5 indépendant du moyen de blocage de la brisure par rapport à la branche.According to another embodiment as shown in Figure 7 the guide portion is related to the break and is provided at the end with diametric slots to form a clamp. This clamp is threaded to cooperate with a means for blocking the bar 5 independent of the means for blocking the break relative to the branch.

Ce moyen de blocage est constitué par un bouton taraudé 26 pour se visser en extrémité de la portion de guidage et comportant une zone conique destinée à venir en contact avec la pince pour blo7 quer la barre 1..This locking means is constituted by a threaded button 26 for screwing at the end of the guide portion and comprising a conical zone intended to come into contact with the clamp for locking 7 against the bar 1 ..

Selon une autre-forme de réalisation (figure 8) le blocage de la barre 5 est assuré par un bouton 27 coopérant avec une pince 28 dans laquelle coulisse la dite barre.According to another embodiment (FIG. 8), the bar 5 is blocked by a button 27 cooperating with a clamp 28 in which the said bar slides.

La pince 28 est montée coulissante dans un orifice de la brisure 4 et comporte un filetage coopérant avec un taraudage du bouton 27.The clamp 28 is slidably mounted in an orifice in the break 4 and has a thread cooperating with a tapping of the button 27.

Le bouton 27 vient en appui contre la brisure et exerce une traction sur la pince qui vient en butée dans son orifice et bloqueThe button 27 comes to bear against the breakage and exerts a traction on the clamp which comes into abutment in its orifice and blocks

la barre 5, indépendamment du moyen de blocage et d'articulation de la brisure 4 avec la branche 2 correspondante.the bar 5, independently of the locking and articulation means of the break 4 with the corresponding branch 2.

La brissure 4 est pourvue d'un moyen de réglage micrométrique du rayon de traçage.The crack 4 is provided with a means for micrometric adjustment of the tracing radius.

A cet effet, la brisure 4 est dotée d'une extrémité fendue prolongée vers le bas par une lame 29 portant des moyens connus en soit de blocage d'une pointe 30 (figure 7)For this purpose, the break 4 is provided with a slotted end extended downwards by a blade 29 carrying known means in itself for blocking a point 30 (FIG. 7)

La brisure est dotée d'un orifice taraudé axial à une-orifice biconique ménagé dans la lame 29 de la brisure.The break has an axial threaded orifice with a biconical orifice formed in the blade 29 of the break.

Le moyen de réglage micrométrique est constitué par une vis 31 s'engageant dans l'orifice tarauda de la brisureThe micrometric adjustment means is constituted by a screw 31 engaging in the tapped hole of the break

Cette vis est terminée par un téton biconiqùe 32 qui coopère avec un orifice biconique de la lame.This screw is terminated by a biconical stud 32 which cooperates with a biconical orifice of the blade.

La rotation dans un sens ou dans l'autre de la vis de réglage provoque le rapprochement ou l'éloignement de la pointe 30.The rotation in one direction or the other of the adjusting screw causes the tip 30 to move towards or away.

Selon une autre forme de réalisation (figure B) le réglage fin du rayon de traçage est obtenu par une légère rotation d'une pièce porte pointe 33 articulée à la brisure 4 par un axe 34. Cette pièce 33 est dotée d'un orifice de passage d'une tige, en partie fileté terminée par un téton par exemple conique de centrage de la dite tige sur la brisure 4.According to another embodiment (FIG. B) the fine adjustment of the tracing radius is obtained by a slight rotation of a tip-holder part 33 articulated to the break 4 by an axis 34. This part 33 is provided with an orifice passage of a rod, partly threaded, terminated by a stud, for example a conical pin for centering said rod on the break 4.

La brisure 4 est pouvue d'un orifice cylindrique axial à la tige recevant un organe élastique par exemple un ressort 35 qui coopère avec la pièce porte-pointe.The break 4 is possible from a cylindrical orifice which is axial to the rod receiving an elastic member, for example a spring 35 which cooperates with the tip-carrying part.

Cet organe élastique est disposé autour de la tige et s'appuie sur la brisure 4 et la pièce porte pointe et tend à écarter la dite pièce porte pointe de la brisure.This elastic member is arranged around the rod and rests on the break 4 and the piece carries the tip and tends to separate the said piece from the tip of the break.

Cette action est contrebalancée par un écrou 36 se vissant sur la partie filetée de la tige.This action is counterbalanced by a nut 36 which is screwed onto the threaded part of the rod.

Comme on le comprend le vissage ou le dévissage de l'écrou 35 va provoquer la rotation de la pièce porte-pointe 33 autour de son axe 34.As can be understood, the screwing or unscrewing of the nut 35 will cause the tip-holder part 33 to rotate about its axis 34.

Selon une autre forme de réalisation, la légère rotation de la pièce porte-pointe ou le rapprochement ou l"éloignement de la branche de la brisure est provoquée par l'action d'une vis filetée à pas différentiel coopérant respectivement avec la dite pièce porte-pointe et avec la brisure 4.According to another embodiment, the slight rotation of the tip-holder part or the approximation or the distance of the branch from the breakage is caused by the action of a threaded screw with differential pitch cooperating respectively with said door part - point and with the break 4.

Selon une autre forme de réalisation connue représentée en figure 1, la pièce porte-pointe se présente sous la forme d'un U 37, entre les ailes duquel est disposée la pointe du compas.According to another known embodiment shown in Figure 1, the tip-holder part is in the form of a U 37, between the wings of which the tip of the compass is disposed.

Cette pièce est logée et articulée par un axe 38 dans une rainure longitudinale ménagée dans la brisure. L'élasticité naturelle de la pièce 36 provoque l'écartement de chacune de ses ailes dans la rainure ce qui supprime le jeu.This part is housed and articulated by an axis 38 in a longitudinal groove formed in the break. The natural elasticity of the part 36 causes the spacing of each of its wings in the groove which eliminates the play.

Le talon de la pièce porte-pointe est disposé à l'extérieur de la rainure et coopère avec un organe élastique tel un ressort à lame 39 enroulé autour de l'axe 38 et coopérant également avec la brisure.The heel of the toe piece is disposed outside the groove and cooperates with an elastic member such as a leaf spring 39 wound around the axis 38 and also cooperating with the break.

Sous l'action de l'organe élastique la pièce porte-pointe à tendance à pivoter autour de l'axe 38.Under the action of the elastic member, the tip-holder part tends to pivot around the axis 38.

Cette action est contrebalancée' par un organe de réglage constitué par une vis et écrou.This action is designed rebalanc t e e 'by an actuator constituted by a screw and nut.

Cette tige filetée a bout conique 40 recevant un écrou de réglage 38 venant en appui contre la brisure.This threaded rod with conical end 40 receiving an adjustment nut 38 bearing against the breakage.

La pointe du compas est bloquée dans la pièce 36 par une vis et écrou à tête conique plaquant la dite pointe contre le talon ce qui permet d'éviter le pincement des ailes.The tip of the compass is locked in the part 36 by a screw and nut with a conical head pressing the said tip against the heel which prevents pinching of the wings.

La brisure porte traceur 3 est dotée d'une tige filetée de fixation des supports des organes traceurs telsqu'une mine et un traceur à encre.The plotter holder break 3 is provided with a threaded rod for fixing the supports of the plotter members such as a lead and an ink plotter.

Le support du traceur à encre est fixé à demeure à la brisure par un bouton moleté avec contre écrou vissé tous deux sur la tige filetée.The ink plotter support is permanently fixed to the break by a knurled button with lock nut screwed both on the threaded rod.

Cette tige est prolongée vers le bas par une partie creuse filetée extérieurement conformée en extrémité en pince pour recevoir une mine.This rod is extended downwards by an externally threaded hollow part shaped as a gripper end to receive a lead.

Cette pince coopère avec un dispositif de blocage classique. Cette disposition permet d'effectuer un tracé à l'aide de la mine sans pour autant se voir dans l'obligation de démonter le support de l'organe de traçage à l'encre.This clamp cooperates with a conventional locking device. This arrangement makes it possible to trace with the aid of the mine without being obliged to dismantle the support of the ink tracing member.

La présente invention permet de réaliser un compas de grande précision et grande facilité d'utilisation par groupement des organes avec économie de gestes.The present invention makes it possible to produce a compass of great precision and great ease of use by grouping the organs with economy of gestures.

Il va de soi que la présente invention peut recevoir tous aménagements ou variante dans pour autant sortir du cadre du présent brevet.It goes without saying that the present invention can receive any arrangement or variant within the scope of this patent.

Claims (8)

1. Compas de précision du.type comportant deux brisures parallèles réunies par une barre de rigidité caractérisé par le fait qu'il comporte un moyen de blocage et de déblocage rapide agissant simultanément sur la rotation des brisures (3) et (4), les déviations transversales et le mouvement de translation de la barre (5) coulissant dans l'une des brisures et par le fait que la distance des axes d'articulation (19) des brisures à l'axe du palier de guidage en translation est fonction de cette longueur de guidage de la barre (5) pour éviter l'arc-boutement au cours des manoeuvres de réglage.1. Precision compass du.type comprising two parallel breaks joined by a stiffness bar characterized in that it comprises a fast locking and unlocking means acting simultaneously on the rotation of the breaks (3) and (4), transverse deviations and the translational movement of the bar (5) sliding in one of the broken pieces and by the fact that the distance from the articulation axes (19) of the broken pieces to the axis of the guide bearing in translation is a function of this guide length of the bar (5) to avoid bracing during adjustment maneuvers. 2. Compas de précision selon la revendication 1 caracté risé en ce que la barre de rigidité (5) coopérant avec les brisures (3) et (4) placées entre leur axe d'articulation 19 et la tête (1) cette disposition réduisant la tendance au flambage par substitution d'une contrainte de traction flexion à une contrainte de flexion compression.2. Precision compass according to claim 1, characterized in that the stiffness bar (5) cooperating with the broken pieces (3) and (4) placed between their articulation axis 19 and the head (1), this arrangement reducing the buckling tendency by substitution of a flexural tensile stress for a compressive flexural stress. 3. Compas de précision selon la revendication 1 caractérisé. en ce que le brisure (4) et la palier de guidage sont pourvus d'une fente de part et d'autre de l'orifice cylindrique, la dite fente étant traversée par la tige filetée du moyen de blocage et d'articulation en sorte que par serrage de l'écrou on déforme le dit palier et la brisure pour bloquer simultanément la barre 1 et la dite brisure.3. Precision compass according to claim 1 characterized. in that the break (4) and the guide bearing are provided with a slot on either side of the cylindrical orifice, said slot being traversed by the threaded rod of the locking and articulation means so that by tightening the nut, the said bearing and the break are deformed to simultaneously block the bar 1 and the said break. 4. Compas de précision selon la revendication 1 caractérisé en ce que le blocage simultané est réalisé par un levier commandé par ressort dont l'action est amplifiée en fonction du rapport des longueurs des bras de telle sorte qu'il en résulte un serrage énergique de la chape ainsi que de la barre (5) dans le palier fendu à rattrapage de jeu par déformation.4. Precision compass according to claim 1 characterized in that the simultaneous blocking is achieved by a lever controlled by spring whose action is amplified as a function of the ratio of the lengths of the arms so that it results in an energetic tightening of the yoke as well as the bar (5) in the split bearing with backlash by deformation. 5. Compas selon la revendication 1 caractérisé en ce que les branches sont constituée chacune d'un élément tubulaire conté- nant dans lequel coulisse et se bloque un élément tubulaire conte nu, ces deux éléments étant dotés d'une fente longitudinale pour que l'élément contenu soit susceptible d'une expansion dans l'élément contenant lui-même susceptible d'une rétraction sur l'élément contenu pour constituer un système à rattrap'pge automatique du jeu.5. Compass according to claim 1 characterized in that the branches each consist of a tubular element containing in which slides and is blocked a tubular element naked, these two elements being provided with a longitudinal slit so that the contained element is capable of expansion in the containing element itself capable of shrinking on the contained element to constitute a catch-up system automatic game. 6. Compas de précision suivant la revendication 1 caractérisé en ce que le réglage fin est obtenu par une rotation d'appoint d'une pièce porte pointe à rattrapage de jeu transversal grâce à sa forme de "U" élastique, un ressort de rappel dit à "action angulaire" assure le maintien en butée sur la tête de la vis conique destinée au réglage. La rainure de guidage transversale de ce levier réalisé sur la brisure est aussi longue que possible pour éliminer les déviations transversales.6. Precision compass according to claim 1 characterized in that the fine adjustment is obtained by an additional rotation of a point-holder piece with transverse play compensation thanks to its elastic "U" shape, a return spring known as "angular action" ensures the abutment on the head of the conical screw for adjustment. The transverse guide groove of this lever produced on the break is as long as possible to eliminate transverse deviations. 7, Compas selon la revendication 1 et la revendication 6 caractérisé en ce que la pointe du compas est plaquée contre le talon de la pièce en ''U" élastique par la tête conique d'une vis pour éviter de pincer les branches de la dite pièce.7, Compass according to claim 1 and claim 6 characterized in that the tip of the compass is pressed against the heel of the piece in "U" elastic by the conical head of a screw to avoid pinching the branches of said room. B. Compas de précision selon la revendication 1 doté d'une tête comportant une chape dans laquelle est articulée deux secteurs dentés s'engrenant l'un avec l'autre et fixés chacun sur une branche caractérisé en ce que les dits secteurs dentés sont constituée de plusieurs lames fixées les unes aux autres par un rivet constituant axe d'articulation de la branche correspondante.B. Precision compass according to claim 1 provided with a head comprising a yoke in which is articulated two toothed sectors meshing with each other and each fixed on a branch characterized in that said toothed sectors are constituted of several blades fixed to each other by a rivet constituting the axis of articulation of the corresponding branch.
EP80401223A 1980-08-27 1980-08-27 Precision compass with articulated legs and rigid cross-bar Expired EP0046830B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AT80401223T ATE16574T1 (en) 1980-08-27 1980-08-27 PRECISION COMPASS WITH ARTICULATED HANDLE AND RIGID ROD.
EP80401223A EP0046830B1 (en) 1980-08-27 1980-08-27 Precision compass with articulated legs and rigid cross-bar
DE8080401223T DE3071252D1 (en) 1980-08-27 1980-08-27 Precision compass with articulated legs and rigid cross-bar

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP80401223A EP0046830B1 (en) 1980-08-27 1980-08-27 Precision compass with articulated legs and rigid cross-bar

Publications (2)

Publication Number Publication Date
EP0046830A1 true EP0046830A1 (en) 1982-03-10
EP0046830B1 EP0046830B1 (en) 1985-11-21

Family

ID=8187393

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80401223A Expired EP0046830B1 (en) 1980-08-27 1980-08-27 Precision compass with articulated legs and rigid cross-bar

Country Status (3)

Country Link
EP (1) EP0046830B1 (en)
AT (1) ATE16574T1 (en)
DE (1) DE3071252D1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2155407A (en) * 1984-02-22 1985-09-25 Djordje Rabatic Geometric device
EP0226214A1 (en) * 1985-12-17 1987-06-24 Ulrich Dipl.-Ing. Schuh Cord mounted straight edge with hidden cords and engageable pulley blocks
DE4215336A1 (en) * 1992-05-09 1993-11-11 Dieter Oswald Pair of compasses with two arms joined at one end - has pin-pointing arm with guide member coupled to holder by guide rod
CN102390202A (en) * 2011-08-18 2012-03-28 河南师范大学 Multifunctional divider calipers

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE79668C (en) *
GB189524765A (en) * 1895-12-27 1896-10-17 Robert Lund Donkin Trammel Compass and Divider.
DE493458C (en) * 1930-03-06 Bayerische Reisszeugfabrik A G Compass with fine adjustment device for the one compass tip
FR984259A (en) * 1948-04-09 1951-07-04 Compass and drawing accessories obtained entirely by stamping
FR1021055A (en) * 1950-06-28 1953-02-13 Advanced compass, for designers
US2701917A (en) * 1952-11-13 1955-02-15 Piab Ab Compass
GB934034A (en) * 1962-06-08 1963-08-14 Yut Chow An improved drawing instrument
CH379777A (en) * 1960-03-11 1964-07-15 Piab Ab Compasses for drawing
FR2451831A1 (en) * 1979-03-20 1980-10-17 Bras Jean Precision compass for drawing - has bar fitted to one hinged leg near joint with end passing through other hinged leg for fixing nut

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE79668C (en) *
DE493458C (en) * 1930-03-06 Bayerische Reisszeugfabrik A G Compass with fine adjustment device for the one compass tip
GB189524765A (en) * 1895-12-27 1896-10-17 Robert Lund Donkin Trammel Compass and Divider.
FR984259A (en) * 1948-04-09 1951-07-04 Compass and drawing accessories obtained entirely by stamping
FR1021055A (en) * 1950-06-28 1953-02-13 Advanced compass, for designers
US2701917A (en) * 1952-11-13 1955-02-15 Piab Ab Compass
CH379777A (en) * 1960-03-11 1964-07-15 Piab Ab Compasses for drawing
GB934034A (en) * 1962-06-08 1963-08-14 Yut Chow An improved drawing instrument
FR2451831A1 (en) * 1979-03-20 1980-10-17 Bras Jean Precision compass for drawing - has bar fitted to one hinged leg near joint with end passing through other hinged leg for fixing nut

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2155407A (en) * 1984-02-22 1985-09-25 Djordje Rabatic Geometric device
EP0226214A1 (en) * 1985-12-17 1987-06-24 Ulrich Dipl.-Ing. Schuh Cord mounted straight edge with hidden cords and engageable pulley blocks
DE4215336A1 (en) * 1992-05-09 1993-11-11 Dieter Oswald Pair of compasses with two arms joined at one end - has pin-pointing arm with guide member coupled to holder by guide rod
CN102390202A (en) * 2011-08-18 2012-03-28 河南师范大学 Multifunctional divider calipers
CN102390202B (en) * 2011-08-18 2013-08-21 河南师范大学 Multifunctional divider calipers

Also Published As

Publication number Publication date
EP0046830B1 (en) 1985-11-21
DE3071252D1 (en) 1986-01-02
ATE16574T1 (en) 1985-12-15

Similar Documents

Publication Publication Date Title
EP1213980B1 (en) Device for locking in position a mobile part relative to a fixed part
EP0029475A1 (en) Device for fastening or locking an object onto a shank
EP0046830B1 (en) Precision compass with articulated legs and rigid cross-bar
FR2684962A1 (en) Box with controlled opening
FR2532743A1 (en) END ASSEMBLY WITH HOOK FOR TAPE RULE, OR LENGTH MEASUREMENT APPARATUS OF THE SAME TYPE, PROVIDING A "TRUE ZERO", AND TAPE RULE PROVIDED WITH SUCH A ASSEMBLY
EP0183629A1 (en) Device for the articulated attachment of tracing instruments and points to the legs of a compass, and drawing compass fitted with this device
EP3749454B1 (en) System for ejecting tips of sampling pipettes with improved ergonomics
FR2569835A1 (en) HEAD FOR MEASURING DIAMETERS OF CYLINDRICAL PARTS
FR2606472A1 (en) Device for articulating two pieces, particularly two tailor's dummy elements
FR2757646A1 (en) ELASTIC HINGE OF EYEWEAR
FR2465573A1 (en) SCISSORS WITH ADJUSTABLE PIVOT
EP0587498A1 (en) Sabre saw with rapid saw blade clamping means
CH664267A5 (en) Wrist-watch strap with links slotted for inserts - has resilient fingers which define slots for clipping into grooves around rods paired within outer links
FR2493434A1 (en) COUPLING DEVICE FOR PROVIDING THE FREE CONNECTION OF A PRECISION POTENTIOMETER AND A MOBILE MACHINE PART
EP0098190A1 (en) Connecting and aligning apparatus for two optical-fibre ferrules having a V-shaped cross-section
FR2559919A1 (en) CENTERING TIP FOR OPTICAL FIBER AND PLUG COMPRISING SUCH A TIP
FR2732083A1 (en) Simplified connector for joining metal sections for construction of exhibition stands
FR2489140A1 (en) ANATOMIC MEASUREMENT TRANSFER COMPASS FOR THE PRODUCTION OF DENTAL PROSTHESES
FR2614142A1 (en) Device for stripping a sheathed wire
FR2938866A1 (en) Actuating system for semi-fixed type double door leaf, has lower rod comprising outer rod element and inner rod element, where inner rod element slides in outer rod element to adjust length of lower rod
FR2678352A1 (en) System for rapidly attaching a camera to a tripod
CH638704A5 (en) DEVICE FOR LOCKING A MOBILE TRAY ON A TABLE ALONG GUIDING MEANS.
CH657995A5 (en) SECURITY FIXING FOR SKIING.
CA1122833A (en) Device for tightening or clamping an object on a rod
FR2654664A1 (en) Vice, the clamping force of which is limited to a given value, and particularly a ski

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

17P Request for examination filed

Effective date: 19820315

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: BRAS, JEAN

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19851121

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 19851121

Ref country code: AT

Effective date: 19851121

REF Corresponds to:

Ref document number: 16574

Country of ref document: AT

Date of ref document: 19851215

Kind code of ref document: T

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19851130

REF Corresponds to:

Ref document number: 3071252

Country of ref document: DE

Date of ref document: 19860102

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19860831

Ref country code: LI

Effective date: 19860831

Ref country code: CH

Effective date: 19860831

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
BERE Be: lapsed

Owner name: BRAS JEAN

Effective date: 19860831

GBPC Gb: european patent ceased through non-payment of renewal fee
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19880429

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19880503

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19881118

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Effective date: 19890831