EP0288404A1 - Blade for fencing sword - Google Patents

Blade for fencing sword Download PDF

Info

Publication number
EP0288404A1
EP0288404A1 EP88420135A EP88420135A EP0288404A1 EP 0288404 A1 EP0288404 A1 EP 0288404A1 EP 88420135 A EP88420135 A EP 88420135A EP 88420135 A EP88420135 A EP 88420135A EP 0288404 A1 EP0288404 A1 EP 0288404A1
Authority
EP
European Patent Office
Prior art keywords
blade
inertia
plane
section
faces
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.)
Withdrawn
Application number
EP88420135A
Other languages
German (de)
French (fr)
Inventor
Jean André Begon
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.)
Begon SA
Original Assignee
Begon SA
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 Begon SA filed Critical Begon SA
Publication of EP0288404A1 publication Critical patent/EP0288404A1/en
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41B—WEAPONS FOR PROJECTING MISSILES WITHOUT USE OF EXPLOSIVE OR COMBUSTIBLE PROPELLANT CHARGE; WEAPONS NOT OTHERWISE PROVIDED FOR
    • F41B13/00—Thrusting-weapons; Cutting-weapons carried as side-arms
    • F41B13/02—Sabres; Cutlasses; Swords; Epees

Definitions

  • sword blades have, in cross section, a shape in circumflex accent shown in Figure 1 and dimensions which are reduced from the tang to the free end of the blade.
  • the object of the invention is to provide a new section of sword blade eliminating the concentrations of stress on the edges, lightening the blade and allowing its manufacture by industrial means and at lower cost.
  • the sword blade according to the invention has in cross section, at all points along its length, a shape whose moments of inertia, with respect to the transverse plane of inertia containing the neutral fiber, are substantially equal, this shape being composed, on the one hand, in the rib working in compression, of an elementary polygonal section having at least two faces parallel to the plane of inertia, and two lateral faces perpendicular to the previous two, and on the other hand, in the wing area working in bending, of two elementary sections, equally spaced on either side of the vertical median plane of the blade, each having a polygonal shape having at least two faces parallel to the plane of inertia and two lateral faces perpendicular to these two last faces, these last two elementary sections constituting, along the length of the blade, extension cords which are each connected to the coast by stress concentration pads, accumulating the fatigue resulting from the stresses on the blade, and arranged so as to be secanted by the plane of inertia.
  • the blade is made up of a rib of polygonal section connected by the constraint studs to two spaced extension cords whose sum of the moments of inertia with respect to the plane of inertia is equal to the moment of inertia of the side in the same cross section.
  • the manufacture of this blade can be carried out industrially by machining machines with numerical control, which allows, by the complete automation of the machining phases to lower the cost of this manufacturing, and to obtain perfect reproducibility of shapes and dimensions.
  • the stress concentration pads connecting the various elementary sections of the blade are delimited by machining carried out in two ribs arranged in a "V" shape with respect to each other connecting each the rib to one of the extension cords and having a rectangular cross section.
  • the blade has in cross section a "V" shape, which gives it a general appearance similar to that of a traditional sword although it is distinguished by superior qualities.
  • the machining operations delimiting the stress concentration pads consist of two longitudinal rows superimposed on oblong slots offset by a constant pitch, arranged parallel to the longitudinal axis of the blade and on either side thereof, the lights of one of the rows being offset from those of the other row.
  • the sword blade according to the invention has in cross section a shape composed, at the level of the rib, of an elementary section A and, at the level of the wings, of elementary sections B.
  • the elementary section A has a polygonal shape comprising two faces 10a-10b parallel to each other and to the plane of inertia x′-x and two lateral faces 12a-12b, mutually parallel and perpendicular to the aforementioned faces 10a-10b and to the plane d 'inertia x′-x.
  • the elementary section A also comprises, on either side of the face 10b, two transverse faces 13a-13b inclined and constituting the back of the rib.
  • Each of the elementary sections B also has a polygonal shape delimited by two plane faces 14a-14b parallel to each other and parallel to the plane of inertia x′-x, by two lateral plane faces 15a-15b parallel to each other but perpendicular to the faces 14a- 14b and by inclined faces 16a-16b and 16c delimiting chamfers on the extension cords thus formed.
  • Each of the elementary sections B is connected to the elementary section A by a rib generally designated by 17.
  • FIGS. 2 and 3 show that these ribs form a regular "V" on either side of the vertical median plane P of the blade and that they are secanted by the plane x′-x. More precisely, these ribs 17 comprise machining operations 18 delimiting between them stress concentration pads 19 accumulating the fatigue resulting from stresses exerted on the blade and capable of yielding beyond a certain value of this fatigue.
  • FIG. 4 shows that the machining operations 18 consist of two longitudinal rows superposed on oblong slots.
  • the two rows are arranged parallel to the longitudinal axis of the blade and on either side of this axis.
  • the lights 18 are distributed with a constant pitch p and the lights of one of the two rows are offset by half a step with respect to those of the other row to form the studs 19, of small dimensions, able to yield for a fatigue value of the metal although cut off by the plane of inertia x′-x.
  • the elementary section A comprises an internal groove 20 capable of receiving an electrical conductor detecting the keys during combat.
  • FIG. 2 and 3 corresponding to two cross sections disposed respectively near the free end of the blade and near the tang, clearly show that despite the dimensional variations of the elementary sections of the blade, this blade retains throughout its length of the planar faces 10a-10b, 12a-12b, 15a-15b, 14a-14b, allowing it to be machined by current or robotic machine tools, which was not the case with the blades comprising the section shown in FIG. 1 .
  • This machining mode makes it possible to vary the dimensions of the elementary cross sections on demand and thus to vary the rigidity of the blade and the position of the flexible zones, therefore to adapt the blade to the wishes of the user.
  • This advantage new compared to forged blades having irregular characteristics, is reproducible from one blade to another since it only depends on the transverse dimensions given to the blade by machining.
  • it makes it possible to manufacture a whole range of blades differentiated by their length, their flexibility, the position of the flexible zones but each having reproducible characteristics, therefore calibrated.
  • the blade has little material on either side of the plane of inertia x′-x and is therefore lighter than a traditional blade.
  • the slots 18 are advantageously executed by laser machining.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)
  • Knives (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Reinforcement Elements For Buildings (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Professional, Industrial, Or Sporting Protective Garments (AREA)
  • Harvester Elements (AREA)

Abstract

This sword blade has, in cross-section and in every zone of its length, a shape of which the moments of inertia in relation to the transverse plane of inertia (x'-x) containing the neutral axis, are substantially equal, this shape being composed, on the one hand, of a polygonal elementary section A having at least two faces (10a-10b) parallel to the plane of inertia and, on the other hand, two elementary sections (B) spaced equally on either side of the vertical mid-plane (P) of the blade, each having a polygonal shape possessing at least two faces (14a-14b) parallel to the plane of inertia, these last two elementary sections each being connected to the section (A) by means of stress concentration studs (19) accumulating the fatigue occurring as a result of stresses on the blade and arranged so as to intersect the plane of inertia (x'-x). <IMAGE>

Description

Traditionnellement, les lames d'épée ont, en section transversale, une forme en accent circonflexe représentée figure 1 et des dimensions qui vont en se réduisant depuis la soie jusqu'à l'extrémité libre de la lame.Traditionally, sword blades have, in cross section, a shape in circumflex accent shown in Figure 1 and dimensions which are reduced from the tang to the free end of the blade.

Lorsque l'on examine cette section en accent circonflexe au titre de la résistance des matériaux, et par rapport à un plan x′-x comprenant la fibre neutre et séparant la partie 2 de la lame travaillant en extension, à savoir les ailes de la partie travaillant en compression, à savoir la côte 3, on constate que la surface de la première 2 est supérieure à celle de la seconde 3, ce qui conduit à des moments d'inertie différents. On constate également que la zone neutre, hachurée à la figure 1, c'est à dire la zone travaillant peu, comporte beaucoup de matière alourdissant inutilement la lame.When we examine this section in circumflex accent in terms of the resistance of the materials, and in relation to a plane x′-x comprising the neutral fiber and separating part 2 of the blade working in extension, namely the wings of the part working in compression, namely the rib 3, it can be seen that the surface of the first 2 is greater than that of the second 3, which leads to different moments of inertia. It is also noted that the neutral zone, hatched in FIG. 1, that is to say the zone working little, comprises a lot of material unnecessarily weighing down the blade.

Un autre inconvénient de cette section en accent circonflexe est la présence aux extrémités des ailes 2 d'arêtes 4 qui subissent les contraintes d'extension les plus élevées et favorisent ainsi, lorsque le métal atteint un niveau élevé de fatigue, le départ de criques pouvant amorcer la rupture transversale de la lame.Another disadvantage of this section in circumflex accent is the presence at the ends of the wings 2 of edges 4 which undergo the highest extension stresses and thus favor, when the metal reaches a high level of fatigue, the departure of cracks which can initiate the transverse rupture of the blade.

Enfin, et il s'agit d'un inconvénient économique très important, la section en accent circonflexe combinée avec les variations de dimensions dans les diverses sections transversales obligent à réaliser la lame manuellement, par absence de toute surface de référence permettant une mécanisation de sa fabrication.Finally, and this is a very significant economic disadvantage, the circumflex accent section combined with the dimensional variations in the various cross sections means that the blade must be produced manually, by the absence of any reference surface allowing mechanization of its manufacturing.

L'invention a pour objet de fournir une nouvelle section de lame d'épée supprimant les concentrations de contrainte sur les arêtes, allégeant la lame et permettant sa fabrication par des moyens industriels et à moindre coût.The object of the invention is to provide a new section of sword blade eliminating the concentrations of stress on the edges, lightening the blade and allowing its manufacture by industrial means and at lower cost.

A cet effet, la lame d'épée, selon l'invention, présente en section transversale, en tous points de sa longueur, une forme dont les moments d'inertie, par rapport au plan d'inertie transversal contenant la fibre neutre, sont sensiblement égaux, cette forme étant composée, d'une part, dans la côte travaillant en compression, d'une section élémentaire polygonale présentant au moins deux faces parallèles au plan d'inertie, et deux faces latérales perpendiculaires aux deux précédentes, et d'autre part, dans la zone des ailes travaillant en flexion, de deux sections élémentaires, espacées également et de part et d'autre du plan médian vertical de la lame, ayant chacune une forme polygonale présentant au moins deux faces parallèles au plan d'inertie et deux faces latérales perpendiculaires à ces deux dernières faces, ces deux dernières sections élémentaires constituant, sur la longueur de la lame, des cordons d'extension qui sont reliés chacun à la côte par des plots de concentration des contraintes, accumulant la fatigue résultant des sollicitations sur la lame, et disposées de manière à être sécantés par le plan d'inertie.To this end, the sword blade according to the invention has in cross section, at all points along its length, a shape whose moments of inertia, with respect to the transverse plane of inertia containing the neutral fiber, are substantially equal, this shape being composed, on the one hand, in the rib working in compression, of an elementary polygonal section having at least two faces parallel to the plane of inertia, and two lateral faces perpendicular to the previous two, and on the other hand, in the wing area working in bending, of two elementary sections, equally spaced on either side of the vertical median plane of the blade, each having a polygonal shape having at least two faces parallel to the plane of inertia and two lateral faces perpendicular to these two last faces, these last two elementary sections constituting, along the length of the blade, extension cords which are each connected to the coast by stress concentration pads, accumulating the fatigue resulting from the stresses on the blade, and arranged so as to be secanted by the plane of inertia.

Ainsi, la lame est composée d'une côte de section polygonale reliée par les plots de contrainte à deux cordons d'extension espacées dont la somme des moments d'inertie par rapport au plan d'inertie est égale au moment d'inertie de la côte dans la même section transversale.Thus, the blade is made up of a rib of polygonal section connected by the constraint studs to two spaced extension cords whose sum of the moments of inertia with respect to the plane of inertia is equal to the moment of inertia of the side in the same cross section.

Il en résulte que lors des assauts et du combat, les contraintes affectant la lame, d'une part se répartissent régulièrement sur les faces planes parallèles au plan d'inertie, ce qui évite la formation de criques sur ses faces et, d'autre part, se transmettent en partie aux plots de concentration qui enregistrent et accumulent ainsi la fatigue du matériau de la lame. Au-delà d'une certaine valeur de fatigue les plots les plus affectés cèdent en informant l'utilisateur qu'il faut rebuter la lame, et en évitant la rupture de cette lame, dangereuse pour l'adversaire.As a result, during assaults and combat, the stresses affecting the blade, on the one hand are regularly distributed on the plane faces parallel to the plane of inertia, which prevents the formation of cracks on its faces and, on the other hand part, are transmitted in part to the concentration pads which register and thus accumulate the fatigue of the material of the blade. Above a certain fatigue value, the most affected studs give way, informing the user that the blade must be discarded, and avoiding the breakage of this blade, dangerous for the opponent.

Enfin, grâce à la présence des faces parallèles sur les diverses sections élémentaires de la lame, la fabrication de celle-ci peut être réalisée de manière industrielle par des machines d'usinage à commande numérique, ce qui permet, par l'automatisation intégrale des phases d'usinage d'abaisser le coût de cette fabrication, et d'obtenir une parfaite reproductibilité des formes et dimensions.Finally, thanks to the presence of the parallel faces on the various elementary sections of the blade, the manufacture of this blade can be carried out industrially by machining machines with numerical control, which allows, by the complete automation of the machining phases to lower the cost of this manufacturing, and to obtain perfect reproducibility of shapes and dimensions.

Dans une forme d'exécution de l'invention, les plots de concentration de contraintes reliant les diverses sections élémentaires de la lame sont délimitées par des usinages réalisés dans deux nervures disposées en "V" l'une par rapport à l'autre reliant chacune la côte à l'un des cordons d'extension et ayant une section transversale rectangulaire.In one embodiment of the invention, the stress concentration pads connecting the various elementary sections of the blade are delimited by machining carried out in two ribs arranged in a "V" shape with respect to each other connecting each the rib to one of the extension cords and having a rectangular cross section.

De ce fait, la lame présente en section transversale une forme en "V", qui lui donne une allure générale similaire à celle d'une épée traditionnelle bien qu'elle s'en distingue par des qualités supérieures.Therefore, the blade has in cross section a "V" shape, which gives it a general appearance similar to that of a traditional sword although it is distinguished by superior qualities.

Avantageusement, les usinages délimitant les plots de concentration de contraintes sont constitués par deux rangées longitudinales superposées de lumières oblongues décalées d'un pas constant, disposées parallèlement à l'axe longitudinal de la lame et de part et d'autre de celui-ci, les lumières de l'une des rangées étant décalées par rapport à celles de l'autre rangée.Advantageously, the machining operations delimiting the stress concentration pads consist of two longitudinal rows superimposed on oblong slots offset by a constant pitch, arranged parallel to the longitudinal axis of the blade and on either side thereof, the lights of one of the rows being offset from those of the other row.

D'autres caractéristiques et avantages ressortiront de la description qui suit en référence au dessin schématique annexé représentant à titre d'exemple non limitatif une forme d'exécution de cette lame d'épée.

  • Figure 1 est une vue de côté en coupe transversale d'une lame d'épée traditionnelle,
  • Figures 2 et 3 sont des vues en coupe transversale de deux sections espacées de la lame selon l'invention,
  • Figure 4 est une vue partielle de côté suivant la flèche 4 de figure 2.
Other characteristics and advantages will emerge from the description which follows with reference to the appended schematic drawing representing by way of nonlimiting example an embodiment of this sword blade.
  • Figure 1 is a side view in cross section of a traditional sword blade,
  • Figures 2 and 3 are cross-sectional views of two spaced sections of the blade according to the invention,
  • Figure 4 is a partial side view along arrow 4 of Figure 2.

Comme le montre les figures 2 et 3, la lame d'épée selon l'invention présente en section transversale une forme composée, au niveau de la côte, d'une section élémentaire A et, au niveau des ailes, de sections élémentaires B.As shown in Figures 2 and 3, the sword blade according to the invention has in cross section a shape composed, at the level of the rib, of an elementary section A and, at the level of the wings, of elementary sections B.

La section élémentaire A présente une forme polygonale comprenant deux faces 10a-10b parallèles entre elles et au plan d'inertie x′-x et deux faces latérales 12a-12b, parallèles entre elles et perpendiculaires aux faces 10a-10b précitées et au plan d'inertie x′-x. La section élémentaire A comprend également, de part et d'autre de la face 10b, deux faces transversales 13a-13b inclinées et constituant le dos de la côte.The elementary section A has a polygonal shape comprising two faces 10a-10b parallel to each other and to the plane of inertia x′-x and two lateral faces 12a-12b, mutually parallel and perpendicular to the aforementioned faces 10a-10b and to the plane d 'inertia x′-x. The elementary section A also comprises, on either side of the face 10b, two transverse faces 13a-13b inclined and constituting the back of the rib.

Chacune des sections élémentaires B présentent également une forme polygonale délimitée par deux faces planes 14a-14b parallèles entre elles et parallèles au plan d'inertie x′-x, par deux faces planes latérales 15a-15b parallèles entre elles mais perpendiculaires aux faces 14a-14b et par des faces inclinées 16a-16b et 16c délimitant des chanfreins sur les cordons d'extension ainsi formés.Each of the elementary sections B also has a polygonal shape delimited by two plane faces 14a-14b parallel to each other and parallel to the plane of inertia x′-x, by two lateral plane faces 15a-15b parallel to each other but perpendicular to the faces 14a- 14b and by inclined faces 16a-16b and 16c delimiting chamfers on the extension cords thus formed.

Chacune des sections élémentaires B est reliée à la section élémentaire A par une nervure désignée de façon générale par 17. Les figures 2 et 3 montrent que ces nervures forment un "V" régulier de part et d'autre du plan médian vertical P de la lame et qu'elles sont sécantées par le plan x′-x. Plus précisément, ces nervures 17 comportent des usinages 18 délimitant entre eux des plots de concentration de contraintes 19 accumulant la fatigue résultant de sollicitations exercées sur la lame et aptes à céder au-delà d'une certaine valeur de cette fatigue.Each of the elementary sections B is connected to the elementary section A by a rib generally designated by 17. FIGS. 2 and 3 show that these ribs form a regular "V" on either side of the vertical median plane P of the blade and that they are secanted by the plane x′-x. More precisely, these ribs 17 comprise machining operations 18 delimiting between them stress concentration pads 19 accumulating the fatigue resulting from stresses exerted on the blade and capable of yielding beyond a certain value of this fatigue.

La figure 4 montre que les usinages 18 sont constitués par deux rangées longitudinales superposées de lumières oblongues. Les deux rangées sont disposées parallèlement à l'axe longitudinal de la lame et de part et d'autre de cet axe. Dans chaque rangée, les lumières 18 sont réparties avec un pas constant p et les lumières de l'une des deux rangées sont décalées d'un demi pas par rapport à celles de l'autre rangée pour constituer les plots 19, de faibles dimensions, aptes à céder pour une valeur de fatigue du métal bien que sécantés par le plan d'inertie x′-x.FIG. 4 shows that the machining operations 18 consist of two longitudinal rows superposed on oblong slots. The two rows are arranged parallel to the longitudinal axis of the blade and on either side of this axis. In each row, the lights 18 are distributed with a constant pitch p and the lights of one of the two rows are offset by half a step with respect to those of the other row to form the studs 19, of small dimensions, able to yield for a fatigue value of the metal although cut off by the plane of inertia x′-x.

De façon connue, la section élémentaire A comporte une rainure intérieure 20 apte à recevoir un conducteur électrique détectant les touches lors du combat.In known manner, the elementary section A comprises an internal groove 20 capable of receiving an electrical conductor detecting the keys during combat.

Les figures 2 et 3, correspondant à deux sections transversales disposées respectivement à proximité de l'extrémité libre de la lame et à proximité de la soie, montrent bien que malgré les variations dimensionnelles des sections élémentaires de la lame, cette lame conserve sur toute sa longueur des faces planes 10a-10b, 12a-12b, 15a-15b, 14a-14b, permettant son usinage par des machines outils courantes ou robotisées, ce qui n'était pas le cas avec les lames comportant la section représentée à la figure 1.Figures 2 and 3, corresponding to two cross sections disposed respectively near the free end of the blade and near the tang, clearly show that despite the dimensional variations of the elementary sections of the blade, this blade retains throughout its length of the planar faces 10a-10b, 12a-12b, 15a-15b, 14a-14b, allowing it to be machined by current or robotic machine tools, which was not the case with the blades comprising the section shown in FIG. 1 .

Ce mode d'usinage permett de faire varier à la demande les dimensions des sections transversales élémentaires et ainsi de faire varier la rigidité de la lame et, la position des zones flexibles, donc d'adapter la lame aux désirs de l'utilisateur. Cet avantage, nouveau par rapport aux lames forgées ayant des caractéristiques irrégulières, est reproductible d'une lame à une autre puisqu'il ne dépend que des dimensions transversales données à la lame par l'usinage. De plus, il permet de fabriquer toute une gamme de lames se différenciant par leur longueur, leur flexibilité, la position des zones flexibles mais possèdant chacune des caractéristiques reproductibles, donc étalonnées.This machining mode makes it possible to vary the dimensions of the elementary cross sections on demand and thus to vary the rigidity of the blade and the position of the flexible zones, therefore to adapt the blade to the wishes of the user. This advantage, new compared to forged blades having irregular characteristics, is reproducible from one blade to another since it only depends on the transverse dimensions given to the blade by machining. In addition, it makes it possible to manufacture a whole range of blades differentiated by their length, their flexibility, the position of the flexible zones but each having reproducible characteristics, therefore calibrated.

Par ailleurs, lors d'un combat, les sollicitations d'extension et de compression, de même que les chocs s'exerçant sur la lame, ne peuvent plus se concentrer sur les arêtes, mais au contraire se répartissenet sur les surfaces planes 14a et 10b, et éventuellement 15a, ce qui supprime toute possibilité de concentration de contraintes favorisant le départ de criques lorsque la lame atteint un taux de fatigue important. Au contraire, la fatigue se concentre en partie sur les plots 19 qui, à partir d'un taux de fatigue donné, dépendant des caractéristiques du métal utilisé mais aussi de la position de la section considérée sur la longueur de la lame, cèdent en assurant la séparation locale de l'un des cordons par rapport à la côte, ce qui prévient l'utilisateur qu'il faut rebuter la lame.Furthermore, during a fight, the stresses of extension and compression, as well as the shocks exerted on the blade, can no longer concentrate on the edges, but on the contrary are distributed over the flat surfaces 14a and 10b, and possibly 15a, which eliminates any possibility of stress concentration favoring the departure of cracks when the blade reaches a significant rate of fatigue. On the contrary, fatigue is partly concentrated on the studs 19 which, from a given fatigue rate, depending on the characteristics of the metal used but also on the position of the section considered along the length of the blade, give way ensuring the local separation of one of the cords from the coast, which warns the user that the blade must be discarded.

Il faut également noter que, grâce à la présence de nervures 17 reliant les cordons latéraux à la côte, la lame possède peu de matière de part et d'autre du plan d'inertie x′-x et est donc plus légère qu'une lame traditionnelle.It should also be noted that, thanks to the presence of ribs 17 connecting the lateral cords to the rib, the blade has little material on either side of the plane of inertia x′-x and is therefore lighter than a traditional blade.

Bien que ne pouvant être réalisée par tout autre moyen, les lumières 18 sont avantageusement exécutées par usinage au laser.Although it cannot be produced by any other means, the slots 18 are advantageously executed by laser machining.

Claims (3)

1. Lame d'épée caractérisée en ce qu'elle présente, en section transversale et en toute zone de sa longueur, une forme dont les moments d'inertie par rapport au plan d'inertie transversal x′-x contenant la fibre neutre, sont sensiblement égaux, cette forme étant composée, d'une part, dans la côte (3) travaillant en compression, d'une section élémentaire polygonale (A) présentant au moins deux faces (10a-10b) parallèles au plan d'inertie, et deux faces latérales (12a-12b) perpendiculaires aux deux précédentes, et, d'autre part, dans la zone des ailes (2) travaillant en flexion, de deux sections élémentaires (B) espacées également et de part et d'autre du plan médian vertical (P) de la lame, ayant chacune une forme polygonale présentant au moins deux faces (14a-14b) parallèles au plan d'inertie, et deux faces latérales (15a-15b) perpendiculaires à ces deux faces, ces deux dernières sections élémentaires (B) constituant, sur la longueur de la lame, des cordons d'extension qui sont reliés chacun à la section élémentaire (A) par des plots de concentration de contraintes (19), accumulant la fatigue résultant des sollicitations sur la lame, et disposés de manière à être sécantés par le plan d'inertie x′-x.1. Sword blade characterized in that it has, in cross section and in any zone of its length, a shape whose moments of inertia with respect to the transverse plane of inertia x′-x containing the neutral fiber, are substantially equal, this shape being composed, on the one hand, in the rib (3) working in compression, of an elementary polygonal section (A) having at least two faces (10a-10b) parallel to the plane of inertia, and two lateral faces (12a-12b) perpendicular to the two preceding ones, and, on the other hand, in the zone of the wings (2) working in bending, of two elementary sections (B) equally spaced and on either side of the vertical median plane (P) of the blade, each having a polygonal shape having at least two faces (14a-14b) parallel to the plane of inertia, and two lateral faces (15a-15b) perpendicular to these two faces, the latter two elementary sections (B) constituting, along the length of the blade, extension cords which are connected each in the elementary section (A) by stress concentration pads (19), accumulating the fatigue resulting from the stresses on the blade, and arranged so as to be cut off by the plane of inertia x′-x. 2. Lame d'épée selon la revendication 1 caractérisée en ce que les plots de concentration de contraintes (19) reliant les diverses sections élémentaires (A et B) de la lame sont délimitées par des usinages (18) réalisés dans deux nervures (17), disposées en "V" l'une par rapport à l'autre, reliant chacune la côte (3) à l'un des cordons d'extension (2) et ayant une section transversale rectangulaire.2. sword blade according to claim 1 characterized in that the stress concentration pads (19) connecting the various elementary sections (A and B) of the blade are delimited by machining operations (18) produced in two ribs (17 ), arranged in a "V" with respect to each other, each connecting the rib (3) to one of the extension cords (2) and having a rectangular cross section. 3. Lame d'épée selon l'ensemble des revendications 1 et 2 caractérisée en ce que les usinages (18) délimitant les plots de concentration de contraintes (19) sont constitués par deux rangées longitudinales superposées de lumières oblongues (18), décalées d'un pas constant, disposés parallèlement à l'axe longitudinale de la lame et de part et d'autre de celui-ci, les lumières de l'une des rangées étant décalées par rapport à celles de l'autre rangée.3. sword blade according to all of claims 1 and 2 characterized in that the machining (18) delimiting the stress concentration pads (19) consist of two longitudinal rows superimposed oblong lights (18), offset by 'a constant pitch, arranged parallel to the longitudinal axis of the blade and on either side thereof, the lights of one of the rows being offset from those of the other row.
EP88420135A 1987-04-23 1988-04-22 Blade for fencing sword Withdrawn EP0288404A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8706042 1987-04-23
FR8706042A FR2614409B1 (en) 1987-04-23 1987-04-23 SWORD BLADE

Publications (1)

Publication Number Publication Date
EP0288404A1 true EP0288404A1 (en) 1988-10-26

Family

ID=9350591

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88420135A Withdrawn EP0288404A1 (en) 1987-04-23 1988-04-22 Blade for fencing sword

Country Status (9)

Country Link
US (1) US4890390A (en)
EP (1) EP0288404A1 (en)
JP (1) JPS63315897A (en)
KR (1) KR880012979A (en)
CN (1) CN1030639A (en)
DD (1) DD284751A5 (en)
FR (1) FR2614409B1 (en)
HU (1) HU198629B (en)
PL (1) PL271965A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4303871A1 (en) * 1992-02-13 1993-08-19 Leon Paul Equipment Co Ltd
GB2264065B (en) * 1992-02-13 1995-04-26 Leon Paul Equip Co Ltd Fencing blade
US6842986B2 (en) 2002-11-15 2005-01-18 Christopher A. Holler Cutting tool with sloping proximal portion and associated methods
US7013569B2 (en) * 2002-11-15 2006-03-21 Holler Christopher A Cutting tool with curved distal portion and associated methods
KR100601694B1 (en) 2004-07-20 2006-07-14 삼성전자주식회사 Waste toner collecting apparatus, and electrophotographic image forming apparatus therewith

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR439666A (en) * 1912-02-02 1912-06-20 Gilbert Bougnol Improvements in the construction of fencing weapons, épées, foils and sabers
GB2129315A (en) * 1982-10-22 1984-05-16 Uhlmann Sportgeraete Fencing blade
WO1986006824A1 (en) * 1985-05-10 1986-11-20 Begon S.A. Société Anonyme Safety fencing sword

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4671005A (en) * 1985-05-09 1987-06-09 Arnold W. Jewell Trigger mechanism

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR439666A (en) * 1912-02-02 1912-06-20 Gilbert Bougnol Improvements in the construction of fencing weapons, épées, foils and sabers
GB2129315A (en) * 1982-10-22 1984-05-16 Uhlmann Sportgeraete Fencing blade
WO1986006824A1 (en) * 1985-05-10 1986-11-20 Begon S.A. Société Anonyme Safety fencing sword

Also Published As

Publication number Publication date
CN1030639A (en) 1989-01-25
PL271965A1 (en) 1989-01-23
US4890390A (en) 1990-01-02
FR2614409A1 (en) 1988-10-28
HUT48019A (en) 1989-04-28
KR880012979A (en) 1988-11-29
HU198629B (en) 1989-11-28
JPS63315897A (en) 1988-12-23
FR2614409B1 (en) 1989-07-21
DD284751A5 (en) 1990-11-21

Similar Documents

Publication Publication Date Title
EP0390705B1 (en) Plastic wrench with metal insert
EP0032101B1 (en) Fatigue indicator
EP2008147B1 (en) Rimless spectacles with sides of essentially filamentary structure
EP2978565A1 (en) Insert holder for a machine tool
FR2911085A1 (en) HORSE COMPRISING A FIRST AND A SECOND MATTER.
EP0718944A1 (en) Cabel duct made of wires
FR2502086A1 (en) WIPER
FR2490271A1 (en) INTERMEDIATE LOAD MEMBER FOR DRILL ROD
EP0090773B1 (en) Saw chain cutter link
EP0288404A1 (en) Blade for fencing sword
EP0258240B1 (en) Safety fencing sword
FR2552354A1 (en) ANNULAR CUTTING TOOL FOR DRILLING HOLES
FR2776307A1 (en) DRAWING MECHANISM FOR ARMOR AND WEAVING MECHANISM COMPRISING SUCH A DRAWING MECHANISM
EP0141731A2 (en) Force sensor comprising an elastic cylinder fitted with strain gauges
FR2779366A1 (en) Drill bit with multi-cutting edges
EP0226497B1 (en) Current collector for a trolley bus
FR2909017A1 (en) PERFECTIONED FLAT MACHINE
CA1193125A (en) Single optic fiber connector
FR2689968A1 (en) Fencing blade.
EP0057633A1 (en) Insulation stripping electrical contact, process of manufacturing or this contact and connectors comprising this contact, particularly for flat cables
FR2738122A1 (en) Link for articulated watch bracelet
FR2574924A1 (en) Depth gauge for dowel holes
FR2635478A1 (en) Rotary cutting tool for surfacing and grooving, of the milling cutter type
EP0069669B1 (en) Handsaw blade and handsaw equipped with such a blade
EP0080426A1 (en) Sponging and stripping-off brush

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

Kind code of ref document: A1

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

17P Request for examination filed

Effective date: 19890420

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

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19901103