EP0258240B1 - Sicherheitsfechtklinge - Google Patents

Sicherheitsfechtklinge Download PDF

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Publication number
EP0258240B1
EP0258240B1 EP86902847A EP86902847A EP0258240B1 EP 0258240 B1 EP0258240 B1 EP 0258240B1 EP 86902847 A EP86902847 A EP 86902847A EP 86902847 A EP86902847 A EP 86902847A EP 0258240 B1 EP0258240 B1 EP 0258240B1
Authority
EP
European Patent Office
Prior art keywords
blade
longitudinal
rupture
section
region
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.)
Expired
Application number
EP86902847A
Other languages
English (en)
French (fr)
Other versions
EP0258240A1 (de
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
Priority to AT86902847T priority Critical patent/ATE45031T1/de
Publication of EP0258240A1 publication Critical patent/EP0258240A1/de
Application granted granted Critical
Publication of EP0258240B1 publication Critical patent/EP0258240B1/de
Expired legal-status Critical Current

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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

  • fencing blades that is, foils, swords and sabers, are made of treated steel, alloyed or not.
  • the object of the present invention is to remedy this drawback by providing a safety blade indicating the moment from which the blade risks breaking and must be discarded.
  • the blade according to the invention comprises, at least over part of its length and from its free end, a longitudinal zone, of reduced cross section, of concentration of stresses urging the blade and suitable, when the fatigue of the material constituting the blade risks causing its transverse sectioning, to yield longitudinally by dividing the blade into two longitudinal fragments indicating this state of fatigue of the metal.
  • the metal constituting the blade reaches a state of fatigue capable of causing the transverse rupture of the latter, the stresses urging it in a fight cause the rupture of the stress concentration zone, at least over part of the length of the blade.
  • the longitudinal slit thus formed modifies the physical characteristics of the blade and provides, on impact, a different sound.
  • the longitudinal rupture zone is constituted by an axial core which, delimited by two deep longitudinal grooves opening out from the small faces of the blade, and giving it a “H” section, has a thickness ranging from increasing, in proportion to the increase in section of the blade, from the end of the latter to the end of this rupture zone.
  • the blade is lighter and all the stresses affecting it on the surface, during a fight, are distributed over the core and over the length thereof.
  • the longitudinal breaking zone is formed in the rib of the back, between the outer face of this rib and the bottom of a longitudinal groove opening into the concavity of the “V” section, and has an increasing thickness, in proportion to the increase in section of the blade, from the end of the latter to the end of this rupture zone.
  • FIG. 1 to 6 denotes a foil blade whose tip is extended by a threaded end 3 and whose heel is extended by a threaded rod 4 for attachment to a handle.
  • this blade has a generally rectangular cross section.
  • this blade has two deep longitudinal grooves 6 emerging from its small faces and giving it a cross section in "H", that is to say formed by two wings 2a connected by a core 2b. More precisely, the two parallel bottoms 6a of the grooves 6 delimit between them, in the rupture zone 7, a stress concentration zone corresponding to the core 2b of the “H” section. Each of the bottoms 6a is connected to the corresponding lateral faces 6b by rounded fillets 8. As illustrated by FIGS.
  • the grooves have a depth p1-p2 which increases, substantially proportional to the increase in the dimensions T1-D1, T2-D2 of the cross section of the blade, so that the core 2b have, in zone 7, a thickness e1-e2 also increasing in proportion to the increase in section to offer constant resistance over this length.
  • the grooves have a constant depth p, and give the core 2b a thickness E which goes up to the heel.
  • These grooves thus define a longitudinal area 7 which, by concentrating stresses, not only precludes the transverse rupture dan- g ereuse of the blade, but this turns out in the longitudinal direction and informs the user of the need to discard his blade.
  • the grooves 6 are provided with sloping side faces 6b converging inwardly and giving them, in cross section, the shape of a trapezoid whose smallest base constitutes the opening 6c emerging from the blade.
  • the opening 6c has a height h which is less than the diameter of the envelope 11a of the conductor 11 intended to be disposed in the groove 6 for transmitting the keys with the opponent's plastron in a fight with the electric foil.
  • the positioning of the conductor in the corresponding groove 6 is carried out by exerting a pressure on the conductor, in the direction of the bottom of the groove, so that its envelope 11 a is deformed elastically during its passage through the opening 6c.
  • the natural elasticity of the envelope 11 a restores the latter to its original dimension.
  • the casing 11a cooperates with the sloping faces 6b of the groove and ensures that the conductor is held in this groove without the need for glue.
  • the conductor 11 is perfectly held in the groove and cannot come out of it, even when the blade is subjected to significant bending. During these flexions, the conductor and its envelope can slide inside the groove 6 without this disturbing its retention in this groove, or the very function of the conductor.
  • the sword shown in Figures 7 to 13 and generally designated by 10, has, in known manner, a cross section in "V" delimiting an outer rib 12 going from the tip 13 to the heel 14.
  • the tip 13 is provided with a threaded end piece 15, while the heel 14 is extended by a threaded rod 16.
  • this sword also comprises, over a part of its length and for example over half of its length, as represented by the distance "I starting from the end of the sword, a longitudinal zone 17 of concentration of stresses and longitudinal failure.
  • This zone is formed in the rib of the back, between the outer face 12 constituting this rib and the bottom 18a of a groove 18 opening into the concavity of the “V” cross section of the sword.
  • the depth p1 -p2 of the groove 18 increases, as shown in FIGS. 12 and 13, from the tip 13 of the blade and in proportion to the variation of the dimensions T1 and D1 of the cross section of this blade.
  • the longitudinal rupture zone 17 has a thickness e1 -e2 which increases from the tip of the blade to the end of the longitudinal zone 7.
  • the groove 18 has a decreasing depth until its bottom 18a touches the bottom 20 of the concavity of the profile of the blade, as shown in FIG. 10.
  • the area of this outcrop is located at a distance L from the end of the blade, of value greater than the distance I.
  • the thickness of the longitudinal break zone 17 of the sword can also be controlled by machining the face 12 with or without groove 18.
  • the thickness e1-e2 of the stress concentration zone 7 of the foil 2 is less than the thickness z of each of the wings 1 Oa-2a which it connects, so as to constitute a zone of rupture.
  • the groove 6-18 making it possible to control the geometrical characteristics of the zone of concentration of stresses, can be carried out in all the materials constituting the blades. However, its realization is simpler, less expensive and faster in blades made of alloy with structural hardening temporarily put in softened position, that is to say when the material is in a state of high plasticity and low hardness, after completion of the grooves 6 and of the other machining operations, the blade is hardened by temperature rise.
  • the core of the foil 2 is crossed, in its part corresponding to the longitudinal rupture zone 7, by slots.
  • These circular lights, as shown at 21 in Figure 14, or oblong, as shown at 22 in Figure 15, are distributed in a step, regular or not. They delimit bridges of material respectively 23-24 which increase the concentration of the stresses and constitute witnesses of rupture.
  • the oblong slots 22, inclined between 30 and 60 ° relative to the longitudinal axis of the foil, are separated by a small step so that the anterior end of each lumen is in front or at least at the posterior end of the perforation which precedes it. They can also, in an embodiment not shown, be staggered on either side of the longitudinal axis of the blade while being parallel to this axis.
  • each light is less than 1 mm and of the order of a few tenths of a millimeter.
  • perforations 21 or 22 can also be made in the longitudinal breaking zone 17 of the sword, with or without the groove 18.
  • the longitudinal rupture zone extended over half the length of the blade, but it is obvious that this dimension is given only by way of example and that it may as well be between one third and two thirds of the length, or even more, depending on the characteristics of the material constituting the blade, material which may be steel, or a forged alloy, but also a composite material.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Control Devices (AREA)
  • Fuses (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
  • Knives (AREA)
  • Endoscopes (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
  • Emergency Lowering Means (AREA)
  • Food-Manufacturing Devices (AREA)

Claims (11)

1. Sicherheitsfechtklinge, dadurch gekennzeichnet, dass sie wenigstens auf einem Teil ihrer Länge und ausgehend von ihrem freien Ende eine Längszone (7-17) umfasst, mit herabgesetztem Querschnitt, mit die Klinge (2-10) beanspruchender Spannungskonzentration und in der Lage, wenn die Ermüdung des wesentlichen Materials der Klinge Gefahr läuft, deren Querschnitt in Bewegung zu bringen, durch Teilen der Klinge in zwei Längsfragmente der Länge nach nachzugeben, was diesen Ermüdungszustand des Metalls anzeigt.
2. Klinge nach Anspruch 1, dadurch gekennzeichnet, dass die Längsbruchzone (7) für ein Florett durch einen axialen Steg (2b) gebildet ist, der, begrenzt durch zwei tiefe Längsnuten (6), die von den kleinen Seiten der Klinge her kommen und dieser einen « H »-Querschnitt geben, eine proportional zur Querschnittszunahme der Klinge (2) von deren Ende bis zum Ende dieser Bruchzone (7) zunehmende Dicke e1 -e2 aufweist.
3. Klinge nach den Ansprüchen 1 und 2, dadurch gekennzeichnet, dass wenigstens die eine der Längsnuten (6) einerseits im Querschnitt eine im wesentlichen trapezartige Form aufweist, deren die Öffnung (6c) bildende kleine Seite von der Klinge her kommt, eine Länge kleiner als der Durchmesser der Umhüllenden des elektrischen Leiters (11) aufweist, der in der Nut untergebracht sein kann, und zum anderen mit Neigung versehene Seitenflächen (6a) aufweist, die geeignet sind, den mechanischen Halt dieses Leiters sicherzustellen, nachdem er in der Nut mit elastischer Deformation seiner Umhüllenden in Eingriff getreten ist.
4. Klinge nach einem beliebigen der Ansprüche 2 bis 3, dadurch gekennzeichnet, dass die beiden Nuten (6) Böden (6a) aufweisen, die zueinander parallel sind und durch ausgerundete Kehlen (8) Anschluss zu den entsprechenden Seitenflächen (6b) dieser Nuten haben.
5. Klinge nach Anspruch 1, dadurch gekennzeichnet, dass die Längsbruchzone (17) für einen Degen, der in bekannter Weise einen im wesentlichen «V»-Querschnitt aufweist, in der Seite der Rückwand zwischen der Aussenseite (12) dieser Seite und dem Boden (18a) einer von der Austiefung des «V»-Querschnitts her kommenden Nut (18) ausgespart ist und eine proportional zur Querschnittszunahme der Klinge (10) von deren Ende bis zum Ende der Bruchzone (17) zunehmende Dicke aufweist.
6. Klinge nach Anspruch 1 und einem beliebigen der Ansprüche 2 bis 5, dadurch gekennzeichnet, dass die Dicke e1 -e2 der Längsbruchzone (7-17) in jedem Querschnitt der Klinge kleiner als die Dicke z eines jeden der Flügel (2a-10a) ist, den diese Zone verbindet.
7. Klinge nach Anspruch 1 und einem beliebigen der Ansprüche 2 bis 6, dadurch gekennzeichnet, dass die Längsbruchzone (7-17) von Querschlitzlöchern (21-22) durchquert ist.
8. Klinge nach Anspruch 7, dadurch gekennzeichnet, dass die Schlitzlöcher (22) kreisförmig sind.
9. Klinge nach Anspruch 7, dadurch gekennzeichnet, dass die Schlitzlöcher länglich sind.
10. Klinge nach den Ansprüchen 7 und 9, dadurch gekennzeichnet, dass die länglichen Schlitzlöcher (22) in bezug auf die Längsache der Klinge geneigt sind und mit einer herabgesetzten Teilung beabstandet sind, so dass das vordere Ende eines jeden Schlitzloches dem hinteren Ende des vorhergehenden Schlitzloches (22) vorausgeht.
11. Klinge nach den Ansprüchen 7 und 9, dadurch gekennzeichnet, dass die länglichen Schlitzlöcher (22) zur Längsachse der Klinge parallel sind, schachbrettförmig und auf beiden Seiten dieser Achse angeordnet.
EP86902847A 1985-05-10 1986-05-07 Sicherheitsfechtklinge Expired EP0258240B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86902847T ATE45031T1 (de) 1985-05-10 1986-05-07 Sicherheitsfechtklinge.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8507459 1985-05-10
FR8507459A FR2581744B1 (fr) 1985-05-10 1985-05-10 Lame d'escrime de securite

Publications (2)

Publication Number Publication Date
EP0258240A1 EP0258240A1 (de) 1988-03-09
EP0258240B1 true EP0258240B1 (de) 1989-07-26

Family

ID=9319354

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86902847A Expired EP0258240B1 (de) 1985-05-10 1986-05-07 Sicherheitsfechtklinge

Country Status (8)

Country Link
US (1) US4817942A (de)
EP (1) EP0258240B1 (de)
AT (1) ATE45031T1 (de)
DE (1) DE3664682D1 (de)
FR (1) FR2581744B1 (de)
HU (1) HUT46142A (de)
SU (1) SU1600617A3 (de)
WO (1) WO1986006824A1 (de)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2614409B1 (fr) * 1987-04-23 1989-07-21 Begon Jean Lame d'epee
GB2264065B (en) * 1992-02-13 1995-04-26 Leon Paul Equip Co Ltd Fencing blade
DE4303871A1 (de) * 1992-02-13 1993-08-19 Leon Paul Equipment Co Ltd
US6099608A (en) 1998-07-30 2000-08-08 3M Innovative Properties Company Rotating filtration cartridge and blower for HVAC applications
US6521011B1 (en) 1999-07-15 2003-02-18 3M Innovative Properties Company Self-supporting pleated filter and method of making same
US6437372B1 (en) 2000-01-07 2002-08-20 Agere Systems Guardian Corp. Diffusion barrier spikes for III-V structures
US6348086B1 (en) * 2000-02-16 2002-02-19 3M Innovative Properties Company Combination blower wheel and filter cartridge system for HVAC applications
US6497619B2 (en) * 2000-06-01 2002-12-24 David D. Dowdy Scoring apparatus for simulated combat
US6565484B1 (en) 2002-01-23 2003-05-20 William C. Adams Fencing sword
RU2006124262A (ru) * 2003-12-09 2008-01-20 Адриан Блэр ГАРДИНЕР (NZ) Игра
US7228633B2 (en) * 2004-03-01 2007-06-12 Ryan Peter M Saber
US20050204714A1 (en) * 2004-03-22 2005-09-22 3M Innovative Properties Company Self-supporting pleated filter and method of making same
US7156891B2 (en) * 2004-09-10 2007-01-02 Filtration Group Incorporated Forced air system air filter
US20180094899A1 (en) * 2016-10-05 2018-04-05 Ronald J. Thornton Fencing Sport Safety Blade

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD34206A (de) *
FR393476A (fr) * 1908-08-19 1908-12-23 Gilbert Bougnol Genre d'épée-fleuret incassable
FR439666A (fr) * 1912-02-02 1912-06-20 Gilbert Bougnol Perfectionnements apportés à la construction des armes d'escrime, épées, fleurets et sabres
US2338007A (en) * 1940-04-27 1943-12-28 James E Krilow Cake and fruit knife
FR1363602A (fr) * 1963-07-05 1964-06-12 Lame de fleuret
GB1473751A (en) * 1976-01-30 1977-05-18 Equipment P Co Ltd Blades for fencing swords
DE3239051C2 (de) * 1982-10-22 1986-08-07 Uhlmann Sportgeräte GmbH & Co KG, 7958 Laupheim Fechtklinge

Also Published As

Publication number Publication date
FR2581744A1 (fr) 1986-11-14
SU1600617A3 (ru) 1990-10-15
EP0258240A1 (de) 1988-03-09
ATE45031T1 (de) 1989-08-15
HUT46142A (en) 1988-09-28
DE3664682D1 (en) 1989-08-31
US4817942A (en) 1989-04-04
FR2581744B1 (fr) 1987-07-24
WO1986006824A1 (fr) 1986-11-20

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