EP0121494B1 - Fusée à tête perforante pour projectile - Google Patents

Fusée à tête perforante pour projectile Download PDF

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Publication number
EP0121494B1
EP0121494B1 EP84810098A EP84810098A EP0121494B1 EP 0121494 B1 EP0121494 B1 EP 0121494B1 EP 84810098 A EP84810098 A EP 84810098A EP 84810098 A EP84810098 A EP 84810098A EP 0121494 B1 EP0121494 B1 EP 0121494B1
Authority
EP
European Patent Office
Prior art keywords
primer
fuse
firing
mobile
positions
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
EP84810098A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0121494A1 (fr
Inventor
Jean-Pierre Golay
Denis Jaunin
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.)
Mefina SA
Original Assignee
Mefina 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 Mefina SA filed Critical Mefina SA
Priority to AT84810098T priority Critical patent/ATE27488T1/de
Publication of EP0121494A1 publication Critical patent/EP0121494A1/fr
Application granted granted Critical
Publication of EP0121494B1 publication Critical patent/EP0121494B1/fr
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C9/00—Time fuzes; Combined time and percussion or pressure-actuated fuzes; Fuzes for timed self-destruction of ammunition
    • F42C9/14—Double fuzes; Multiple fuzes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C11/00—Electric fuzes
    • F42C11/02—Electric fuzes with piezo-crystal
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C15/00—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges
    • F42C15/18—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein a carrier for an element of the pyrotechnic or explosive train is moved
    • F42C15/188—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein a carrier for an element of the pyrotechnic or explosive train is moved using a rotatable carrier
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C19/00—Details of fuzes
    • F42C19/02—Fuze bodies; Fuze housings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C19/00—Details of fuzes
    • F42C19/06—Electric contact parts specially adapted for use with electric fuzes

Definitions

  • a projectile When it is desired that a projectile is capable of destroying a target made of hard material, for example a concrete fort or an armored vehicle, it must be provided with a piercing head capable of penetrating the hard material and protecting the percussion and firing device for the projectile. Indeed, the projectile must be equipped with a rocket producing a delayed firing so that the explosion does not occur until after the penetration of the projectile into the goal. Instantaneous firing would do little damage to an armored goal.
  • the present invention aims to allow the choice of an instantaneous or delayed firing for a single projectile, this by a robust and reliable construction.
  • the subject of the present invention is a rocket with a piercing head for a projectile according to, for example, document US-A-2485887 and comprising an electric firing device and means for delaying firing, this device and these means being placed inside or behind a perforation piece made of high resistance material.
  • This rocket is characterized in that the firing device comprises two electric primers having different characteristics, these primers being carried by a moving part subjected to a restoring force and capable of occupying three positions, one of which is safety and two active positions, to place respectively no primer, or the first, or the second primer, opposite an explosive charge, a delay mechanism put into action by inertia at the start of the shot ensuring a delay in the movement of the moving part towards the one of its active positions, a selection device making it possible to choose the desired active position, the timer mechanism being provided with at least one stop member cooperating with the moving part and capable of occupying three positions, including one for blocking the moving part in its safety position, the other two positions of the stop member allowing the moving part to move in one or the other from its active positions, the selection device having a stop surface to limit the stroke of the stop member to define the stop of the moving part in its first active position.
  • the rocket shown comprises an annular part 1, fixed by crimping on a protective part 2 having an external thread 3 making it possible to fix the assembly on the body, not shown, of a projectile.
  • the annular part 1 surrounds an electrical firing device, comprising a striker 5 disposed in a cap 4 and intended to strike a hammer 6, against the action of a spring 7 at the time of impact.
  • the shock produced on the hammer 6 is applied to a piezoelectric element 8, which provides an electrical voltage peak under the effect of the shock.
  • This piezoelectric element rests on the front face of the protective part 2, which constitutes an anvil and at the same time an electrode at ground potential, while the hammer 6 constitutes the other electrode, which is connected via from a contact finger 10 to a step-down transformer 9.
  • the rocket also includes a timer mechanism 11, provided with a counterweight 12, which can be moved at the start of the blow to band a spring.
  • the latter acts as a motor on a clockwork movement contained in the timer 11, a movement which is of known construction and which will therefore not be shown in detail.
  • a movement of this kind is moreover described in CH-A-635 672.
  • the rod 13 constitutes a stop member for a moving part 15 in the form of a rotor pivotally mounted on a pin 16 and a pivot 17.
  • the pin 16 is secured to a spiral spring 18, the outer end of which is fixed to a bearing 19 of the rod 13, this bearing being carried by a disc 20.
  • This spring 18 biases the rotor 15 in a clockwise direction and this is retained in its rotation by the stop rod 13, which cooperates with a shoulder 21, provided on the periphery of the rotor to block it in the safety position.
  • the shoulder 21 is followed by a shoulder 22 which makes it possible to define a first active position of the rotor 15 by abutment against the rod 13. If the rod 13 is sufficiently displaced to release the shoulder 22, the rotor can turn further to reach a second active position.
  • the rotor 15 contains two electrical primers, only one of which is visible in FIGS. 1 and 2. These primers have different characteristics, one being intended for instantaneous firing and the other for delayed firing of the projectile. .
  • a pyrotechnic chain 25, 26, intended for communicate the firing of the projectile's explosive charge.
  • the component 25 of the pyrotechnic chain is separated from the rotor 15 by a metal disc 27 and is located opposite an orifice 28, formed in this disc.
  • the contact for supplying tension to the primer 24 is constituted by a rod 29, subjected to the action of a spring 30 and cooperating with a contact blade 31 which touches the finger 32 for supplying tension to the primer 24.
  • the contact rod 29 is pressed against the disc 20 which is at ground potential, so that the ignition terminals of the primer 24 are short-circuited, which makes the device completely neutral with respect to induced voltages, for example by electromagnetic devices.
  • no primer is found opposite the hole 28, since it is the safety position.
  • the arrangement is the same for the other primer, which is not shown and which also has an elastic contact rod.
  • the stop rod 13 has moved upwards and the rotor 15 has rotated under the action of the spring 18 to bring the primer 24 opposite the hole 28.
  • the contact rod 29 has slipped under the disc 20 until it is opposite an opening 23 of the disc 20 which it crosses under the action of the spring 30 to come into contact with a current supply formed by a conductor 33, the latter is connected to the step-down transformer 9.
  • the voltage produced by the piezoelectric element is applied to the primer 24 passing through the finger 10, the transformer 9 , the conductor 33, the rod 29 and the blade 31.
  • the selection of one or the other of the primers is controlled by acting on a rotary member 34 having a slotted head 35.
  • This member has an end 36 intended to limit the travel of the stop rod 13. In the position illustrated in FIG. 3, the end 36 prevents any displacement of the rod 13 upwards, making it possible to free the shoulder 21 of the rotor 15. If the member 34 is rotated by half a turn, as illustrated in FIGS. Figures 1 and 2, the part 13 can slide to release the shoulder 21 and constitute a stop for the shoulder 22 to define a first stop position of the rotor 15. When the member 34 is turned only one quarter turn, the end 36 is outside the path of the rod 13, so that its lower end is placed higher than the shoulder 22. The rotor 15 can then rotate until the rod contact 29 comes up against the end of a slot 38 extending the opening 23. In this positio n the contact rod of the other primer crosses the opening 23 after having slipped under the disc 20.
  • the end 36 has a housing 39 opposite the rod 13, in which this rod would be housed in the event that it is accidentally released, so as to prevent any rotation of the member 34 and prohibit armament of the rocket.
  • the member 34 is of course placed in its selection position before the start of the shot, so that after the launch of the projectile and after the delay given by the timer mechanism 11, the rod 13 moves upwards, under the action of the spring 14 and occupies, according to the preselection, a stop or release position for the shoulder 22 of the rotor 15.
  • the other primer is short-circuited by its rod 29 which is either pressed against the plate 20, or in contact with this plate at the end of the slot 38.
  • the striker 5 and the hammer 6 act on the piezoelectric element to produce an ignition voltage which is transmitted almost instantaneously to the primer which has been selected.
  • the generator is then dislocated by the impact shock, but the firing device is protected by the shielding piece 2 while the latter acts as a piercing head when entering the goal. Firing then occurs normally.
  • the shielding part 2 no longer has a protective role to play, but it makes it possible to use only one model of projectile which is also suitable. both for instant ignition and for delayed ignition after penetration into hard material.

Landscapes

  • General Engineering & Computer Science (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Toys (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
  • Fireproofing Substances (AREA)
  • Air Bags (AREA)
  • Laminated Bodies (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)
  • Soft Magnetic Materials (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Electric Clocks (AREA)
  • Drilling And Boring (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Fuses (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (AREA)
  • Stringed Musical Instruments (AREA)
EP84810098A 1983-03-07 1984-02-28 Fusée à tête perforante pour projectile Expired EP0121494B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84810098T ATE27488T1 (de) 1983-03-07 1984-02-28 Panzerbrechender geschosszuender.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1218/83 1983-03-07
CH1218/83A CH650330A5 (fr) 1983-03-07 1983-03-07 Fusee a tete perforante pour projectile.

Publications (2)

Publication Number Publication Date
EP0121494A1 EP0121494A1 (fr) 1984-10-10
EP0121494B1 true EP0121494B1 (fr) 1987-05-27

Family

ID=4205254

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84810098A Expired EP0121494B1 (fr) 1983-03-07 1984-02-28 Fusée à tête perforante pour projectile

Country Status (9)

Country Link
US (1) US4606271A (no)
EP (1) EP0121494B1 (no)
AT (1) ATE27488T1 (no)
CA (1) CA1245506A (no)
CH (1) CH650330A5 (no)
DE (1) DE3463971D1 (no)
ES (1) ES8503220A1 (no)
FI (1) FI77730C (no)
NO (1) NO163076C (no)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8322610U1 (de) * 1983-08-05 1985-01-17 Diehl GmbH & Co, 8500 Nürnberg Sicherungseinrichtung fuer bodenaufschlagzuender bei streumunition
CH664010A5 (fr) * 1985-07-12 1988-01-29 Mefina Sa Fusee pour projectile.
US4723087A (en) * 1985-09-09 1988-02-02 Raychem Ltd. Piezoelectric impact sensor
DE3833751C1 (de) * 1988-10-05 1999-06-10 Diehl Stiftung & Co Auslöseeinrichtung für das Zünden eines Anti-Shelter-Projektiles
FR2726359B1 (fr) * 1994-10-26 1996-11-29 Thomson Brandt Armements Fusee d'impact a double securite
CA2517200C (en) 2003-02-27 2011-02-08 Sn Technologies S.A. Missile fuse

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2129692A (en) * 1937-10-01 1938-09-13 Edwin J Hottinger Fuse
US2485887A (en) * 1944-04-06 1949-10-25 Us Navy Projectile
US2789508A (en) * 1953-02-18 1957-04-23 Rove Gene Safety and arming mechanism
NL124444C (no) * 1960-07-21
FR1595412A (no) * 1968-12-19 1970-06-08
FR2142634B2 (no) * 1971-02-11 1973-05-25 Lacroix
FR2126571A5 (no) * 1971-02-11 1972-10-06 Lacroix
DE2308912C3 (de) * 1973-02-23 1981-01-08 Messerschmitt-Boelkow-Blohm Gmbh, 8000 Muenchen Elektrische Zündanlage für die Sprengladung eines Gefechtskopfes o.dgl
DE2312793A1 (de) * 1973-03-15 1974-09-19 Dynamit Nobel Ag Piezoelektrischer zuender, insbesondere fuer geschosse
US3967556A (en) * 1975-03-31 1976-07-06 The United States Of America As Represented By The Secretary Of The Army Pneumatic fuze for safing and arming missiles
DE2533585A1 (de) * 1975-07-26 1977-02-10 Messerschmitt Boelkow Blohm Gefechtskopf zur bekaempfung von raeumlichen zielen, insbesondere schiffen
CH648110A5 (fr) * 1982-06-29 1985-02-28 Mefina Sa Dispositif de mise a feu d'une amorce de projectile.

Also Published As

Publication number Publication date
US4606271A (en) 1986-08-19
ES530305A0 (es) 1985-02-16
NO163076C (no) 1990-03-28
DE3463971D1 (en) 1987-07-02
FI77730C (fi) 1989-04-10
CA1245506A (fr) 1988-11-29
FI77730B (fi) 1988-12-30
FI840894A (fi) 1984-09-08
CH650330A5 (fr) 1985-07-15
EP0121494A1 (fr) 1984-10-10
NO840817L (no) 1984-09-10
FI840894A0 (fi) 1984-03-06
ES8503220A1 (es) 1985-02-16
ATE27488T1 (de) 1987-06-15
NO163076B (no) 1989-12-18

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