US2787958A - Projectile - Google Patents

Projectile Download PDF

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Publication number
US2787958A
US2787958A US372063A US37206353A US2787958A US 2787958 A US2787958 A US 2787958A US 372063 A US372063 A US 372063A US 37206353 A US37206353 A US 37206353A US 2787958 A US2787958 A US 2787958A
Authority
US
United States
Prior art keywords
projectile
charge
outer body
bodies
gyration
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 - Lifetime
Application number
US372063A
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English (en)
Inventor
Brandt Edgar William
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.)
BELGE DE MECANIQUE ET D ARMEME
BELGE DE MECANIQUE ET D'ARMEMENT SA
Original Assignee
BELGE DE MECANIQUE ET D ARMEME
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 BELGE DE MECANIQUE ET D ARMEME filed Critical BELGE DE MECANIQUE ET D ARMEME
Application granted granted Critical
Publication of US2787958A publication Critical patent/US2787958A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F42B12/00—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material
    • F42B12/02—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect
    • F42B12/04—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of armour-piercing type
    • F42B12/10—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of armour-piercing type with shaped or hollow charge
    • F42B12/12—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of armour-piercing type with shaped or hollow charge rotatably mounted with respect to missile housing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B1/00—Explosive charges characterised by form or shape but not dependent on shape of container
    • F42B1/02—Shaped or hollow charges
    • F42B1/036—Manufacturing processes therefor

Definitions

  • Projectiles fired from a rifled gun barrel have a speed of gyration proportional to their linear speed and inversely proportional to their caliber.
  • centrifugal force resulting from such gyration and acting on the internal mechanism of the projectile is such that in certain cases the projectile does not or only inadequately fulfils the function which it is intended to perform.
  • the projectile of the present invention is of the type which is stabilized by gyration, fired from a rified gun barrel and which comprises an internal charge-carrier body housed and centred at its ends in a coaxial external body from which it is separated by a peripheral space.
  • the inner body rests at its base on a liquefiable and lubricating element, adapted under the effect of the propulsive charge to resist and to transmit the thrust from the outer body to the charge-carrier body, while communicating to said latter only a small fraction of the speed of gyration resulting from the engagement of the driving band of the outer body in the rifling.
  • the aforesaid liquefiable and lubricating element may advantageously consist of thermoplastic material, paraffines or waxes, which in its initial state, retain their normal shape but which liquefy under pressure and rise in temperature.
  • An element of this type forms a hydraulic cushion withstanding the effect of inertia of the 2,?87,958 Patented Apr. 9, 1957 inner charge-carrier body with respect to the outer body, and ensures perfect lubrication of the assembly.
  • Centring means may be provided having axial play and solid with one of the aforesaid bodies which centring means are adapted to permit axial displacement of one of the bodies with respect to the other, but which themselves are not affected by an axial thrust.
  • Balls or rings of anti-friction material may advantageously serve as centring means and may be disposed in rear and in front of the inner body. Since said centring means are not subjected to any axial thrust on the firing of the shot, they do not undergo any deformation and the effect of friction which results from the gyration is permissible.
  • the outer body has a density higher than that of the inner charge-carrier body, which is of light metal of equal resistance to the inertia and internal pressures developed on the firing of the shot.
  • the outer body Since the mass of the outer body is substantially greater than that of the inner body, said outer body stabilizes after the manner of a flywheel, the inner body, the weight and wall thickness of which are reduced to a minimum.
  • the outer body entirely surrounds the inner body and one of the centring members, preferably the front member, then constitutes a bearing acting as thrust block and serving to prevent the displacement of the inner body in the forward direction with respect to the outer body, which under the influence of the air resistance undergoes a reduction of velocity while the inner body tends to retain its initial velocity.
  • the liquefiable and lubricating element is housed in at least two compartments of the peripheral space which intercommunicate through orifices serving to balance pressure between said compartments on the firing of the shot.
  • one or two metallic rings may be inserted in the peripheral space and may be retained in one or two corresponding grooves in the inner body. These rings then act as sealing packings.
  • the outer body is closed at its base by a plug solid with the inner body.
  • Figure l is an axial half-section of one embodiment
  • Figure 2 shows, in axial half-section, a modification of the projectile illustrated in Figure l.
  • the projectile illustrated in Figure 1 comprises an outer body 1, a coaxial inner charge-carrier body 2 and a hollow explosive charge 3, the cavity of which is covered with a metal liner 4.
  • a peripheral space 5 separates the bodies 1 and 2 and at its bottom part comprises two compartments 6 and '7 intercornmunicating through passages 8 and filled with a liquefiable substance 9, for example parafiine wax.
  • Two bearing rings 16 and 11, of an anti-friction alloy or of graphite, are interposed between the bodies 1 and 2; the first 10 is mounted on the neck 12 of the piece 13 forming the cap of the charge-carrier body 2 and is coaxial with an annular centring element is, which in 3 turn is retained between the two parts 15 and 16 constituting the ogive of the projectile.
  • the bearing ring 11 acts as a rear centring of the inner body 2 and is mounted on a base plug 23.
  • a percussion fuze 17 is screwed to the end of the substantially conical cap 15, 16.
  • the primer-detonator 1 8 of fuze 17 transmits the fire on impact to the main detonator 19, which in turn ignites a relay charge 3a which induces the explosion of the hollow charge 3.
  • the compartment 6 containing the parafiine .wax is sealed peripherally by two annular rings 20 retained respectively in grooves 21 provided in the wall of the inner body 2.
  • the outer body 1 is provided with the usual driving band 22 adapted to engage the rifling of the barrel.
  • Figure 2 illustrates an embodiment in which the outer body 1a is open at the front, the ogival part 16a of the projectile being integral with the inner body 2a which it is desired to free from the eifect of gyration.
  • the base plug 23a is also rigidly connected to the body 2a.
  • the base of the projectile has two concentric surfaces S1 and S2 belonging respectively to the outer and inner bodies. If said surfaces bear to one another the ratio of the masses M1 and M2 of the bodies 111 and 2a and of the elements of the assembly which are integral therewith, the propulsive forces and hence the accelerations applied of the firing of the shot to the two bodies, will be the same.
  • the cap 16a may, in addition, "be provided at its periphery with vanes "26 inclined in relation to the axis of the projectile, for the purpose of braking the residual effect of gyration transmitted by the outer body 1a.
  • a spin stabilized projectile fired from a rifled gun comprising an inner charge carrier body, an outer coaxial body in which said inner charge carrier body is housed and centred, a driving band around said outer body, a peripheral space between said inner and outer bodies, a circular aperture in the bottom of said outer body and a plug closing said aperture, said plug being fixed in the bottom of said inner body and independent from movement of said outer body, a deformable lubricating element lodged rearwardly of said inner .body, between said inner and said outer bodies, said element being liquefiable at firing under the thrust of said outer body on said inner body, an annular sealing means between said inner and outer bodies, infront of said element, to retain said element, when liquefied, in the rear part ofr'said peripheral space, said element preventing rolling friction between the rear corresponding parts ofsaid inner body and said outer body.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Toys (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
US372063A 1952-09-15 1953-08-03 Projectile Expired - Lifetime US2787958A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
LU316791X 1952-09-15

Publications (1)

Publication Number Publication Date
US2787958A true US2787958A (en) 1957-04-09

Family

ID=19732552

Family Applications (1)

Application Number Title Priority Date Filing Date
US372063A Expired - Lifetime US2787958A (en) 1952-09-15 1953-08-03 Projectile

Country Status (8)

Country Link
US (1) US2787958A (enrdf_load_stackoverflow)
BE (1) BE522072A (enrdf_load_stackoverflow)
CH (1) CH316791A (enrdf_load_stackoverflow)
DE (1) DE940813C (enrdf_load_stackoverflow)
FR (1) FR1082452A (enrdf_load_stackoverflow)
GB (1) GB734998A (enrdf_load_stackoverflow)
LU (1) LU31685A1 (enrdf_load_stackoverflow)
NL (2) NL88120C (enrdf_load_stackoverflow)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2900873A (en) * 1955-11-10 1959-08-25 Haut Rhin Manufacture Machines Ordnance
US2927535A (en) * 1957-02-14 1960-03-08 Forsvarets Fabriksstyrelse Finless hollow charge projectile
US2981188A (en) * 1955-10-10 1961-04-25 Henry S Lipinski Spin-stabilized projectile with nonrotating shaped charge
US3157124A (en) * 1961-01-05 1964-11-17 Rheinmetall Gmbh Spin stabilized hollow charge projectile
US3361385A (en) * 1965-04-02 1968-01-02 Bert B. Gould Miniature ballistic rocket
US3613585A (en) * 1958-10-24 1971-10-19 Us Army High explosive antitank shell
US5164538A (en) * 1986-02-18 1992-11-17 Twenty-First Century Research Institute Projectile having plural rotatable sections with aerodynamic air foil surfaces
US5194690A (en) * 1990-02-21 1993-03-16 Teledyne Industries, Inc. Shock compression jet gun
US6026750A (en) * 1998-04-01 2000-02-22 Alliant Techsystems Inc. Shaped charge liner with integral initiation mechanism

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3002455A (en) * 1955-04-12 1961-10-03 Bofors Ab Ballistic missile
DE1135341B (de) * 1959-10-03 1962-08-23 Karl Kaesmeier Dipl Ing Drallstabilisiertes Hohlladungsgeschoss
LU38607A1 (enrdf_load_stackoverflow) * 1960-05-05
US10408590B1 (en) * 2018-10-24 2019-09-10 The United States Of America As Represented By The Secretary Of The Army Flash output for projectile training

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US407648A (en) * 1889-07-23 emmens
US464569A (en) * 1891-12-08 Shell for high explosives
US684949A (en) * 1900-09-18 1901-10-22 Alexandre Primat Projectile.
US1176082A (en) * 1914-12-15 1916-03-21 George M Beers Projectile.
US1191178A (en) * 1915-08-27 1916-07-18 Arthur Henry Wallis Projectile for firearms.
US1307607A (en) * 1918-06-13 1919-06-24 Willie A Wilkins Projectile.
US1895207A (en) * 1929-06-25 1933-01-24 Berlin Karlsruher Industriewer Method of forming projectiles
US2623465A (en) * 1949-02-15 1952-12-30 Brandt Soc Nouv Ets Projectile

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1305216A (en) * 1917-12-11 1919-05-27 Clarence Janes Projectile.

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US407648A (en) * 1889-07-23 emmens
US464569A (en) * 1891-12-08 Shell for high explosives
US684949A (en) * 1900-09-18 1901-10-22 Alexandre Primat Projectile.
US1176082A (en) * 1914-12-15 1916-03-21 George M Beers Projectile.
US1191178A (en) * 1915-08-27 1916-07-18 Arthur Henry Wallis Projectile for firearms.
US1307607A (en) * 1918-06-13 1919-06-24 Willie A Wilkins Projectile.
US1895207A (en) * 1929-06-25 1933-01-24 Berlin Karlsruher Industriewer Method of forming projectiles
US2623465A (en) * 1949-02-15 1952-12-30 Brandt Soc Nouv Ets Projectile

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2981188A (en) * 1955-10-10 1961-04-25 Henry S Lipinski Spin-stabilized projectile with nonrotating shaped charge
US2900873A (en) * 1955-11-10 1959-08-25 Haut Rhin Manufacture Machines Ordnance
US2927535A (en) * 1957-02-14 1960-03-08 Forsvarets Fabriksstyrelse Finless hollow charge projectile
US3613585A (en) * 1958-10-24 1971-10-19 Us Army High explosive antitank shell
US3157124A (en) * 1961-01-05 1964-11-17 Rheinmetall Gmbh Spin stabilized hollow charge projectile
US3361385A (en) * 1965-04-02 1968-01-02 Bert B. Gould Miniature ballistic rocket
US5164538A (en) * 1986-02-18 1992-11-17 Twenty-First Century Research Institute Projectile having plural rotatable sections with aerodynamic air foil surfaces
US5194690A (en) * 1990-02-21 1993-03-16 Teledyne Industries, Inc. Shock compression jet gun
US5303633A (en) * 1990-02-21 1994-04-19 Teledyne Industries, Inc. Shock compression jet gun
US6026750A (en) * 1998-04-01 2000-02-22 Alliant Techsystems Inc. Shaped charge liner with integral initiation mechanism

Also Published As

Publication number Publication date
NL180360B (nl) 1900-01-01
NL88120C (enrdf_load_stackoverflow) 1900-01-01
FR1082452A (fr) 1954-12-29
DE940813C (de) 1956-03-29
GB734998A (en) 1955-08-10
LU31685A1 (enrdf_load_stackoverflow) 1900-01-01
BE522072A (enrdf_load_stackoverflow) 1900-01-01
CH316791A (fr) 1956-10-31

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