EP0258240A1 - Sicherheitsfechtklinge. - Google Patents

Sicherheitsfechtklinge.

Info

Publication number
EP0258240A1
EP0258240A1 EP86902847A EP86902847A EP0258240A1 EP 0258240 A1 EP0258240 A1 EP 0258240A1 EP 86902847 A EP86902847 A EP 86902847A EP 86902847 A EP86902847 A EP 86902847A EP 0258240 A1 EP0258240 A1 EP 0258240A1
Authority
EP
European Patent Office
Prior art keywords
blade
longitudinal
section
zone
blade according
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
EP86902847A
Other languages
English (en)
French (fr)
Other versions
EP0258240B1 (de
Inventor
Jean Andre 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

Links

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 present invention aims 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 the stresses stressing 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 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, with 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, proportional to the increase in section of the blade, from the end of the latter to the end of this rupture zone
  • Figure 1 is a perspective view of the foil
  • Figure 2 is a longitudinal sectional view along line II— II of figure
  • FIG. 3 is a cross-sectional view similar to the figure of an alternative embodiment
  • Figure 7 is a perspective view of a sword blade
  • Figure 8 is a sectional view along VIII-VIII of Figure 7
  • Figure 9 is a view, in elevation, showing from below the hollow of the blade of Figure 7 .
  • Figures 10, 11, 12 and 13 are sectional views along X-X, XI-XI,
  • Figures 1 ⁇ and 15 are side elevation views showing, to scale enlarged, fragments of foil blades according to two alternative embodiments of the rupture zone.
  • FIGS. 1 to 6 designates a foil blade whose tip is extended by a threaded end piece 3 and whose heel is extended by a threaded rod ⁇ for fixing to a handle.
  • this blade has a transverse cross section of generally rectangular shape.
  • this blade has two longitudinal grooves profon ⁇ 6 opening 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 zone of concentration of stresses corresponding to the core 2b of the section in "H". 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 pl-p2 which goes, increasing, substantially in proportion to the increase in dimensions Tl-Dl, T2-D2 of the cross section of the blade, so that the core 2b has, in zone 7, a thickness el-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 increases to the heel.
  • the grooves 6 are provided with sloping side faces 6b converging towards the outside and giving them, in cross section, the shape of a trapezoid, the smallest base of which constitutes the opening 6c emerging from the blade.
  • the opening 6c has a height h which is less than the diameter of the casing l ia of the conductor 11 intended to be placed in the groove 6 for transmitting the keys with the opponent's plastron in an electric foil fight.
  • 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 l ia is deformed elastically during its passage through the opening 6c.
  • the envelope 1a cooperates with the sloping faces 6b of the groove and ensures that the conductor is held in this groove without the need for glue. Thanks to this arrangement, the conductor 11 is perfectly held in the groove and cannot exit outside of the groove, 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 "V" cross section 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 "1" starting from the end of the sword, a longitudinal zone 17 of concentration of stress and longitudinal failure.
  • This area is provided 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 cross section in "V" of the sword.
  • the depth pl-p2 of the groove 18 increases, as shown in the figures 12 and 13, from the tip 13 of the blade and in proportion to the variation of the dimensions Tl and Dl of the cross section of this blade.
  • the longitudinal rupture zone 17 has a thickness el-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 is flush with the bottom 20 of the concavity of the profile of the blade, as shown in FIG. 10.
  • the area of this affleu ⁇ ment is located at a distance L from the end of the blade, of value greater than the distance 1.
  • 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 el-e2 of the stress concentration zone 17 of the sword, as well as the thickness el-e2 of the stress concentration zone 7 of foil 2 is less than the thickness z of each of the wings 10a-2a which it connects, so as to constitute a rupture zone well.
  • the groove 6-18 making it possible to control the geometric characteristics of the stress concentration zone, can be produced in all the materials constituting the blades. However, its realization is simpler, less expensive and faster in blades made of alloy with structural hardening put temporarily in the softened position, that is to say when the material is in a state of high plasticity and low hardness, after making grooves 6 and other machining operations that the blade is hardened by temperature rise.
  • the core of the foil 2 is crossed in its part corresponding to the longitudinal breaking zone 7, by slots.
  • These lights of circular shape, 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 23-24 respectively which increase the concentration of stresses and constitute failure indicators.
  • the oblong openings 22 are inclined between 30 and 60 ° relative to the longitudinal axis of the foil, are separated by a small pitch so that the anterior end of each lumen is in front of or at least at the posterior end of the perforation which precedes it.
  • each light can also, in an embodiment not shown, be staggered on either side of the longitu ⁇ dinal axis of the blade while being parallel to this axis.
  • the transverse dimension of each light is less than 1 mm and of the order of a few tenths of a millimeter.
  • such 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 extends 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 of steel, or of forged alloy but also a composite material .

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Knives (AREA)
  • Mechanical Control Devices (AREA)
  • Fuses (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
  • Food-Manufacturing Devices (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Emergency Lowering Means (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
  • Endoscopes (AREA)
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
FR8507459A FR2581744B1 (fr) 1985-05-10 1985-05-10 Lame d'escrime de securite
FR8507459 1985-05-10

Publications (2)

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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8606824A1 *

Also Published As

Publication number Publication date
HUT46142A (en) 1988-09-28
DE3664682D1 (en) 1989-08-31
WO1986006824A1 (fr) 1986-11-20
ATE45031T1 (de) 1989-08-15
US4817942A (en) 1989-04-04
FR2581744A1 (fr) 1986-11-14
EP0258240B1 (de) 1989-07-26
FR2581744B1 (fr) 1987-07-24
SU1600617A3 (ru) 1990-10-15

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