EP0206978B1 - Fusée de projectile à percussion - Google Patents

Fusée de projectile à percussion Download PDF

Info

Publication number
EP0206978B1
EP0206978B1 EP86810158A EP86810158A EP0206978B1 EP 0206978 B1 EP0206978 B1 EP 0206978B1 EP 86810158 A EP86810158 A EP 86810158A EP 86810158 A EP86810158 A EP 86810158A EP 0206978 B1 EP0206978 B1 EP 0206978B1
Authority
EP
European Patent Office
Prior art keywords
drum
spring
projectile
timing mechanism
moveable member
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
EP86810158A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0206978A1 (fr
Inventor
Jean-Pierre Golay
Pierre Luc Gagnebin
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
Publication of EP0206978A1 publication Critical patent/EP0206978A1/fr
Application granted granted Critical
Publication of EP0206978B1 publication Critical patent/EP0206978B1/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
    • F42C15/00—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges
    • F42C15/44—Arrangements for disarming, or for rendering harmless, fuzes after arming, e.g. after launch

Definitions

  • a percussion projectile rocket comprising a striker and a pyrotechnic chain leading to a detonator, the whole being arranged to ignite the projectile upon impact, at least one moving part acting between the striker and the detonator for prevent firing before the start of the blow and for a period corresponding to safety of mouth after the start of the blow, means causing a displacement of this moving part to bring it into an active position allowing firing during impact, a time delay device acting on this same moving part to then move it away from its position allowing firing and bringing it into an inactive position for which firing is no longer possible, the rocket comprising also a motor spring, one end of which acts on the moving part (see CH-A 199 818).
  • the moving part is biased by a spring and is engaged with a timer which slows down its movement.
  • This moving part is constituted by a rotating disc which performs only a fraction of a turn between its initial safety position and its final safety position.
  • This disc is arranged in the path of the striker to prevent its movement towards the detonator, but has an arcuate slot through which the striker can pass for the duration of the active position.
  • the transition from the initial safety position to the active position is done gradually, which gives an area of uncertainty from the start of the active position.
  • the invention aims to avoid this area of uncertainty.
  • the rocket according to the invention is characterized in that the other end acts on the timing device, means for locking the moving part being brought into the unlocking position by the timing device.
  • a projectile 1 is provided at its front part with a rocket 2 which comprises a body 3 screwed into a bore at the end of the projectile.
  • the front part of the body 3 comprises a percussion head 4 covered by a cap 5 and connected to a striker 6.
  • This head is urged forward by a spring 7 bearing on a cylindrical part 8.
  • the rod of the striker passes through a box 9 containing a mechanical safety device intended to prevent any movement of the striker before the projectile is loaded into a weapon.
  • This safety device is not part of the invention and will not be described in detail, because it can be of any known type.
  • the tip of the striker 6 is disposed opposite a primer 10 disposed in a part 11.
  • the primer 10 is connected to a detonator 12 by a pyrotechnic chain which is not shown in detail, because this is a provision well known in itself.
  • the detonator 12 is intended to produce the firing of the charge 13 of the projectile.
  • a housing 14 contains a safety device preventing the initiation of ignition of the detonator until the projectile has left its weapon.
  • This device comprises a moving part which creates a break in the pyrotechnic chain between the primer and the detonator, either by interposing a fire-resistant shutter placed in the path of the chain, or by distancing an element of the chain pyrotechnic.
  • the safety device placed in the housing 14 is locked in its safety position by a bar 15 retained in position by an elastic notch 16, adjusted so as to give way during the acceleration that the projectile undergoes in the weapon upon departure. therefore.
  • FIGS 2 to 4 show the safety device of the housing 14.
  • This device comprises a rotary drum 17 mounted rotating on a pivot 18, which can pivot itself between two plates 19 and 20.
  • This pivot 18 carries two toothed wheels 21 and 22, the first of which 21 is engaged with a toothed wheel 23 of a locking device which will be described later.
  • the toothed wheel 22 is engaged with a train - of multiplying gears, these gears being disposed between the plate 20 and the upper plate 24.
  • This gear train ends in a manner known per se to an exhaust mechanism 25, 26.
  • the drum has a part forming a barrel 27 coaxial with its pivot axis on the pivot 18 and housing a spiral spring 28.
  • the latter is attached by one of its ends 29 to the barrel and by its other end 30 to the pivot 18. It exerts therefore a torque in one direction on the pivot 18 and in the other direction on the drum 17.
  • the latter comprises a recess 31 intended to contain an element of the pyrotechnic chain. In the position illustrated in FIG. 4, this element of the chain is in a position which does not allow it to transmit the ignition of the primer 10 to the detonator 12.
  • the bar 15, illustrated in FIG. 1, crosses a gear wheel 32 of the gear train and thus blocks the latter, which constitutes with the exhaust parts 25 and 26 a time delay device.
  • the bar 15 is also engaged in a notch 33 provided in the periphery of the drum 17.
  • This drum also has a boss 34 which is intended to cooperate with a collar 35 integral in rotation with a pivot 37 bearing the toothed wheel 23 and having a flat 36, this assembly constituting a locking device.
  • the toothed wheel 32 is fixed on a pivot 38 having a notch 39 and intended to cooperate with a projection 40 provided inside the barrel 27.
  • the device works as follows:
  • the spring 28 is banded so as to urge the drum 17 anticlockwise to bring it into its active position.
  • this displacement is not possible, because the projection 40 of the barrel abuts against the pivot 38, which is retained in angular position by the bar 15 passing through the toothed wheel 32.
  • the pivot 38 has made a rotation of a quarter turn, its notch 39 releases the projection 40 and the drum 17 rotates under the action of the spring 28 worth approximately half a turn until its boss 34 abuts against the collar 35 of the pivot 37.
  • the element of the pyrotechnic chain which is placed in the recess 31 of said drum, is in the active position to transmit the firing of the primer 10 to the detonator 12.
  • the time necessary for the wheel 32 to release the drum 17 is chosen so as to ensure muzzle safety, that is to say to prevent the firing of the projectile in the event that it comes to touch an object in the first 50 to 100 meters of the trajectory of the projectile.
  • the spring 28 continues to relax by operating the exhaust 25, 26 and by rotating the pivot 37 in an anticlockwise direction.
  • the rotation of the pivot 18 continues, of course only in the case where the projectile has not exploded.
  • the drum 17 resumes its rotation until the boss comes into contact with a stop 41. At this time, it is in a position where communication pyrotechnic between the primer 10 and the detonator 12 is interrupted. The danger of an accidental explosion of the projectile when handling a misfire is thus eliminated.
  • Figures 5 and 6 relate to an alternative embodiment in which there is the drum 17, its pivot 18 and the entire gear train ensuring the braking of the movement of the pivot 18 by the exhaust device 25, 26.
  • This part of the mechanism operates in the same way as in the case of the embodiment according to FIGS. 2 to 4.
  • the mechanism causing the second part of the angular displacement of the drum 17 is modified. It is replaced by a spring device intended to return the drum 17 to its initial position after it has occupied its active position allowing the firing of the projectile.
  • This spring device consists of a pivot 42 carrying a toothed wheel 43 which meshes with a toothed crown 44, integral with the barrel 27.
  • the pivot 42 is surrounded by a spring 45 attached to a stud 46 of the plate 20.
  • the spring 45 is only slightly tensioned so that the torque which it exerts on the drum 17, by means of the gears 43 and 44, is much weaker and directed in the opposite direction than the torque exerted by the spring 28 of the barrel.
  • the drum 17 is released, caused by the rotation of the pivot 38 cooperating with the projection 40, the drum 17 is placed in its active position by rotating the pivot 42 and further tensioning the spring 45.
  • the active position of the drum 17 is obtained by a slot 47 wider than the diameter of the pivot 38 and by the stop obtained by the end 48 of this slot against the pivot 38, after a rotation of about half a turn.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Golf Clubs (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Vibration Dampers (AREA)
  • Air Bags (AREA)
  • Automotive Seat Belt Assembly (AREA)
  • Toys (AREA)
EP86810158A 1985-06-06 1986-04-02 Fusée de projectile à percussion Expired EP0206978B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH239385A CH661169GA3 (enrdf_load_stackoverflow) 1985-06-06 1985-06-06
CH2393/85 1985-06-06

Publications (2)

Publication Number Publication Date
EP0206978A1 EP0206978A1 (fr) 1986-12-30
EP0206978B1 true EP0206978B1 (fr) 1989-10-18

Family

ID=4232724

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86810158A Expired EP0206978B1 (fr) 1985-06-06 1986-04-02 Fusée de projectile à percussion

Country Status (3)

Country Link
EP (1) EP0206978B1 (enrdf_load_stackoverflow)
CH (1) CH661169GA3 (enrdf_load_stackoverflow)
DE (1) DE3666503D1 (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO891579L (no) * 1988-05-16 1989-11-17 Oerlikon Buehrle Ag Blindgjengerinnlegg for en prosjektiltenner.

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE428837A (enrdf_load_stackoverflow) * 1937-06-30
US3107618A (en) * 1961-10-27 1963-10-22 James L Vanover De-arming device
DE2423912C3 (de) * 1974-05-16 1978-11-16 Messerschmitt-Boelkow-Blohm Gmbh, 8000 Muenchen Wiedersicherungseinrichtung fur Minen
SE428725B (sv) * 1979-06-21 1983-07-18 Foerenade Fabriksverken Mina
FR2563622B1 (fr) * 1984-04-26 1987-10-02 France Etat Armement Dispositif de securite et d'armement pour engins explosifs

Also Published As

Publication number Publication date
EP0206978A1 (fr) 1986-12-30
CH661169GA3 (enrdf_load_stackoverflow) 1987-07-15
DE3666503D1 (en) 1989-11-23

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