EP0154762A2 - Insertion de base à répartition irrégulière des masses pour obus d'artillerie - Google Patents

Insertion de base à répartition irrégulière des masses pour obus d'artillerie Download PDF

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Publication number
EP0154762A2
EP0154762A2 EP84830327A EP84830327A EP0154762A2 EP 0154762 A2 EP0154762 A2 EP 0154762A2 EP 84830327 A EP84830327 A EP 84830327A EP 84830327 A EP84830327 A EP 84830327A EP 0154762 A2 EP0154762 A2 EP 0154762A2
Authority
EP
European Patent Office
Prior art keywords
base plug
respect
projectile
base
plug
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Withdrawn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
EP84830327A
Other languages
German (de)
English (en)
Other versions
EP0154762A3 (fr
Inventor
Rodolfo Andreetta
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.)
Simmel Difesa SpA
Original Assignee
Simmel Difesa SpA
Simmel SpA
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 Simmel Difesa SpA, Simmel SpA filed Critical Simmel Difesa SpA
Publication of EP0154762A2 publication Critical patent/EP0154762A2/fr
Publication of EP0154762A3 publication Critical patent/EP0154762A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B30/00—Projectiles or missiles, not otherwise provided for, characterised by the ammunition class or type, e.g. by the launching apparatus or weapon used
    • F42B30/003—Closures or baseplates therefor

Definitions

  • the present invention relates to base plugs for artillery projectiles intended to eject a useful load at a given point of their trajectory.
  • the base plug once separated from the projectile, does not go to interfere with the trajectory of the useful load because in such a case the load could be damaged.
  • arrangements have been devised to avoid that such a disadvantage may occur.
  • base plugs of a composite structure comprising a separable centering element inserted in a cavity provided in the base plug itself.
  • This element can be either slidable but not separable, or totally separable.
  • This assembly has a symmetrical distribution of the masses and therefore does not cause any disturbance in the trajectory of the projectile.
  • the components of the base plug are either thrown each in a different direction by the centrifugal force or, because of the eccentricity of the center of gravity due to their mutual movement, they are deviated, so that they go out from the trajectory of the useful load.
  • a base plug with eccentric structure is also known, in which a portion of material is missing in a side zone (that is, the center of gravity of the base plug is not on the axis of the projectile) and therefore at the time of splitting up the base plug is moved away from the trajectory of the useful load by the centrifugal force.
  • the base plugs with eccentric structure due to the .. fact that their center of gravity is on the axis of the projectile, may cause disturbances in the trajectory of the projectile, it being, however, possible to keep these disturbances within acceptable limits. Nevertheless, the forging process of the blank of base plugs having an eccentrical structure is rather complicated.
  • the base plug according to the invention having its geometric center on the axis of the projectile, is characterized in that it has a center of gravity eccentric with respect to the axis of the projectile because of the pressure of masses incorporated in the base plug having a different density with respect to the remainder of the material of the base plug.
  • the base plug 1 is provided with a blind hole 2 drilled in the side facing toward the inside of the projectile. This hole is filled with a threaded plug 3 having a different mass with respect to that of the base plug 1. It is apparent that the connection between plug 3 and plug 1 may be provided, besides by screwing, by other well known means, each as by welding, glueing and the like.
  • blind hole 2 may be drilled, instead of from the side of the base plug facing the inside of the projectile, also from the side facing outwardly.
  • Figures 3 and 4 show a second embodiment of the base plug according to the invention, in which the base plug 1' has been provided with a blind hole 2' drilled from the side of the base plug 1' facing the inside of the projectile. This hole 2' has thereafter been fitted by pouring into it a suitable material 3' of a density different from that of the base plug 1, for example a resin.
  • blind hole 2' might be provided in the portion of the base plug l' facing the outside of the projectile.
  • FIG. 5 A third embodiment of the invention is shown in Figures 5 and 6. This embodiment is similar to that shown in Figures 3 and 4, except that two blind holes are provided, symmetrically disposed with respect to an X-X centerline.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Details Of Rigid Or Semi-Rigid Containers (AREA)
  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
  • Closures For Containers (AREA)
EP84830327A 1984-01-20 1984-12-04 Insertion de base à répartition irrégulière des masses pour obus d'artillerie Withdrawn EP0154762A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT19251/84A IT1173088B (it) 1984-01-20 1984-01-20 Tappo fondello a masse differenziate per proiettili d'artiglieria
IT1925184 1984-01-20

Publications (2)

Publication Number Publication Date
EP0154762A2 true EP0154762A2 (fr) 1985-09-18
EP0154762A3 EP0154762A3 (fr) 1988-05-25

Family

ID=11156129

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84830327A Withdrawn EP0154762A3 (fr) 1984-01-20 1984-12-04 Insertion de base à répartition irrégulière des masses pour obus d'artillerie

Country Status (3)

Country Link
EP (1) EP0154762A3 (fr)
ES (1) ES292712Y (fr)
IT (1) IT1173088B (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0246205A1 (fr) * 1986-01-29 1987-11-19 Aktiebolaget Bofors Construction de projectile pour réduire la dispersion à l'impact
EP0253021A1 (fr) * 1986-04-24 1988-01-20 Rheinmetall GmbH Projectile sous-calibré à portée limitée du type flèche pour arme à canon
FR2650066A1 (fr) * 1989-07-24 1991-01-25 Rheinmetall Gmbh Projectile porteur
WO2004099699A2 (fr) * 2003-05-06 2004-11-18 Richard Sexton Procede de tir d'une arme a feu dans le but de disperser des projectiles

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2316575A1 (fr) * 1975-07-04 1977-01-28 Bofors Ab Dispositif pour le culot d'un projectile mis a feu par une charge propulsive
DE2738031A1 (de) * 1976-08-23 1978-03-02 Foerenade Fabriksverken Vorrichtung zum ausstoss und zum trennen von koerpern aus bzw. von einem geschoss

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2316575A1 (fr) * 1975-07-04 1977-01-28 Bofors Ab Dispositif pour le culot d'un projectile mis a feu par une charge propulsive
DE2738031A1 (de) * 1976-08-23 1978-03-02 Foerenade Fabriksverken Vorrichtung zum ausstoss und zum trennen von koerpern aus bzw. von einem geschoss

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0246205A1 (fr) * 1986-01-29 1987-11-19 Aktiebolaget Bofors Construction de projectile pour réduire la dispersion à l'impact
EP0253021A1 (fr) * 1986-04-24 1988-01-20 Rheinmetall GmbH Projectile sous-calibré à portée limitée du type flèche pour arme à canon
US4765248A (en) * 1986-04-24 1988-08-23 Rheinmetall Gmbh Limited range, arrow stabilized subcaliber projectile for a tubular weapon
FR2650066A1 (fr) * 1989-07-24 1991-01-25 Rheinmetall Gmbh Projectile porteur
DE3924397A1 (de) * 1989-07-24 1991-02-07 Rheinmetall Gmbh Traegergeschoss
US5042389A (en) * 1989-07-24 1991-08-27 Rheinmetall Gmbh Carrier projectile
WO2004099699A2 (fr) * 2003-05-06 2004-11-18 Richard Sexton Procede de tir d'une arme a feu dans le but de disperser des projectiles
WO2004099699A3 (fr) * 2003-05-06 2005-02-10 Richard Sexton Procede de tir d'une arme a feu dans le but de disperser des projectiles
US7017495B2 (en) * 2003-05-06 2006-03-28 Richard Sexton Gun firing method for dispersion of projectiles in a pattern

Also Published As

Publication number Publication date
IT1173088B (it) 1987-06-18
ES292712U (es) 1986-06-16
IT8419251A0 (it) 1984-01-20
ES292712Y (es) 1987-03-01
EP0154762A3 (fr) 1988-05-25

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Owner name: SIMMEL DIFESA S.P.A.

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Effective date: 19890628

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Inventor name: ANDREETTA, RODOLFO