US3435769A - Disintegrating bullet for practice cartridges for small-arms or automatic weapons - Google Patents

Disintegrating bullet for practice cartridges for small-arms or automatic weapons Download PDF

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Publication number
US3435769A
US3435769A US604697A US3435769DA US3435769A US 3435769 A US3435769 A US 3435769A US 604697 A US604697 A US 604697A US 3435769D A US3435769D A US 3435769DA US 3435769 A US3435769 A US 3435769A
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US
United States
Prior art keywords
bullet
casing
base
projectile
barrel
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
US604697A
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English (en)
Inventor
Raimund Germershausen
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.)
Rheinmetall Industrie AG
Original Assignee
Rheinmetall GmbH
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 Rheinmetall GmbH filed Critical Rheinmetall GmbH
Application granted granted Critical
Publication of US3435769A publication Critical patent/US3435769A/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
    • F42B8/00—Practice or training ammunition
    • F42B8/12—Projectiles or missiles
    • F42B8/14—Projectiles or missiles disintegrating in flight or upon impact
    • F42B8/16—Projectiles or missiles disintegrating in flight or upon impact containing an inert filler in powder or granular form
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B5/00—Cartridge ammunition, e.g. separately-loaded propellant charges
    • F42B5/02—Cartridges, i.e. cases with charge and missile
    • F42B5/067—Mounting or locking missiles in cartridge cases

Definitions

  • Fla Hum cclenensuaus e TTOIZ-Nb YS United States Patent Ofiice 3,435,769 Patented Apr. 1, 1969 3 435,769 DISINTEGRATING BULLET FOR PRACTICE CARTRIDGES FOR SMALL-ARMS R AUTO- MATIC WEAPONS Raimund Germershausen, Dusseldorf-Nerd, Germany, as-
  • Disintegrating bullets consist substantially of a plastic casing which is filled with heavy pulverous material and is sealed by means of a base which also consists of plastic.
  • such a bullet is substantially the same as a live bullet as regards its outer shape and its weight. Only if this requirement is met is it possible for the bullet to be used in automatic Weapons as Well without a detrimental elfect on the breech and loading mechanism of the gun.
  • the weight and shape of the bullet must allow the buildup of a predetermined gas pressure in the powder chamber, for on this depends the operation of the entire gun mechanism; it is, however, equally important that the bullet disintegrates readily immediately after leaving the barrel so that it cannot do any damage beyond a predetermined distance from the barrel muzzle.
  • the known bullet casings are provided in the longitudinal direction with several intended break lines.
  • a hollow shank adjoining the bullet base is provided projecting into the casing into the region of a widened guide ridge, said shank being provided with a surface of contact which bears against the inside wall of the bullet casing and which extends preferably over the entire length of the shank.
  • a further feature of this invention consists in that the end face of the hollow shank is employed as support for a reinforcement plate arranged in the bullet casing in the region of the guide ridge. This secures the reinforcement plate against displacement within the bullet casing. If it were not so supported, the reinforcement plate would be able to move somewhat rearwardly on firing in spite of the bullet filling and would thus no longer provide support for the guide ridge. The result would be an insufiicient seal between the bullet and barrel, which in extreme cases would make the recoil impulse too weak to ensure satisfactory operation of the gun mechanism.
  • the bullet or projectile illustrated in the drawing consists substantially of a thin-walled casing 1 extending to the base and a thick-walled base 5.
  • the rear portion of the bullet casing 1 comprises externally an annular thickening which is in the form of a guide ridge or band 2 and the purpose of which is to provide a good seal between the bullet and the barrel and a better centring of the bullet in the barrel.
  • the guide ridge 2 substantially corresponds in thickness to the guide ring of a live bullet, but the width thereof is substantially greater in the case of a disintegrating bullet.
  • a wide guide ridge 2 ensures an effective sealing and centring of the bullet in the barrel.
  • the portion of the bullet casing 1 which extends below the guide ridge 2 to the base comprises a transverse grooving 3 which, alone or in conjunction with an adhesive, ensures a firm fitting in the mouth of the cartridge case.
  • the inner surface of the mouth of the cartridge case may of course also be provided with a corresponding transverse grooving, but the advantage of a smooth cartridge mouth is that the cartridge case can be used if desired for live ammunition as well.
  • the bullet casing 1 is provided on the inside with a plurality of intended break lines 4 which extend as weakening grooves in the longitudinal direction of the bullet from the tip down to the guide ridge 2.
  • the thick-walled bullet base 5 comprises a long hollow shank 6 whose wall thickness decreases gradually from the base upwardly, the outer surface of said shank extending parallel to the bullet axis.
  • the end face of the hollow shank 6 extends up to the guide ridge 2 and serves as axial support for the reinforcing plate 8, which consists of plastic or board.
  • the outer surface of the hollow shank 6 is at the same time the surface of contact with the bullet casing 1.
  • the base comprises a shoulder 7, against which bears the lower end of the casing 1. The width of the shoulder 7 corresponds to the wall thickness of the casing 1.
  • the hollow shank 6 may also be provided with a plurality of intended break lines 9 extending longitudinally.
  • the reinforcing plate 8 After insertion of the bullet filling, which may consist of compressed mouldings or briquets 10 and 11 of heavy pulverous filler material, the reinforcing plate 8 is inserted.
  • the base 5, whose hollow shank 6 is also filled with a compressed moulding 12, is then pressed into the open end of the bullet casing 1 until the end face of the shank 6 abuts against the reinforcing plate 8 and the shoulder 7 against the lower edge of the casing 1.
  • the casing 1 and the base 5 are joined together at the shoulder 7 by welding. This may be done thermally or by induction by means of an inlaid metal wire or metal foil, by ul trasonic Welding, or by friction welding.
  • the welding may be carried out by means of a suitably heated mould in such a manner that the base 5 tapers conically towards the rear.
  • this disintegrating bullet of simple construction provides the excellent longitudinal and radial stability, the good seal between the bullet and the inside of the barrel and the good centring of the bullet in the barrel.
  • the wide guide ridge 2 prevents firing gases flowing past the bullet.
  • the hollow shank 6 is expanded under the effect of the momentum of the filling and pressed firmly agains the inside of the barrel. This provides an excellent gaseealing effect and a good centring of the bullet in the barrel.
  • the hollow shank 6 subjected to the internal stress due to the filling disintegrates along the break lines 9, the bullet casing 1 beginning to split at the same time.
  • the base piece consisting of the hollow shank 6 and the base 5 is made of a particularly brittle plastic, it may be ensured that not only the hollow shank 6 disintegrates into strips, but that the thickwalled base 5 also disintegrates into fragments of small range.
  • a decisive factor in ensuring that the disintegrating bullet remains intact in the barrel is sufiicient thickness of the bullet base, so that the latter is able to withstand the shearing forces arising on firing due to the various radial stresses between the casing and base. This may, however, also be achieved by using a particularly suitable plastic of high notch impact strength.
  • a practice projectile having a forward end, a rear end and an axis aligned with the direction of intended flight, comprising a generally tubular projectile casing having a closed forward end, a rear end, an inside surface, an outside surface, and an annular guiding and sealing band projecting radially outward from its outside surface; a separate annular reinforcing member within said projectile casing engaging the inside surface of said projectile casing radially opposite from said band; a base member generally closing the rear end of said projectile casing and extending forwardly to supportingly abut the rear end of said reinforcing member; a readily destructible filler material within said projectile casing; and means for rupturing said projectile casing to release said filler material during firing of the projectile.
  • said base includes a tubular hollow shank having an outside annular surface engaging the adjacent inside surface of said projectile casing and a forwardly facing annular surface abutting said reinforcing member.
  • said rupturing means is a plurality of generally axially extending grooves in said projectile casing to tear axially; said filler material is pulverant; said projectile casing is of one-piece synthetic material construction and said base is of one piece construction.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Soil Working Implements (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
  • Crushing And Pulverization Processes (AREA)
US604697A 1966-01-07 1966-12-27 Disintegrating bullet for practice cartridges for small-arms or automatic weapons Expired - Lifetime US3435769A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DER42380A DE1273373B (de) 1966-01-07 1966-01-07 Zerfallgeschoss fuer UEbungspatronen fuer Handfeuer- oder Maschinenwaffen

Publications (1)

Publication Number Publication Date
US3435769A true US3435769A (en) 1969-04-01

Family

ID=7406635

Family Applications (1)

Application Number Title Priority Date Filing Date
US604697A Expired - Lifetime US3435769A (en) 1966-01-07 1966-12-27 Disintegrating bullet for practice cartridges for small-arms or automatic weapons

Country Status (11)

Country Link
US (1) US3435769A (de)
AT (1) AT267370B (de)
BE (1) BE692258A (de)
CH (1) CH468616A (de)
DE (1) DE1273373B (de)
DK (1) DK122913B (de)
FR (1) FR1507578A (de)
GB (1) GB1168702A (de)
NL (1) NL6700078A (de)
NO (1) NO116229B (de)
SE (1) SE302579B (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3785293A (en) * 1970-12-31 1974-01-15 Aai Corp Practice ammunition
US3898933A (en) * 1973-03-21 1975-08-12 Haut Rhin Manufacture Machines Training bullet for fire arms
US4716835A (en) * 1986-05-23 1988-01-05 NWM de Kruithoorn B.V., Poeldonkweg Disintegrating projectile for cartridged maneuver ammunition
US5375529A (en) * 1991-10-18 1994-12-27 Snc Industrial Technologies Inc./Les Technologies Industrielles Snc Inc. Prefragmenting munitions
US7207276B1 (en) * 2004-08-25 2007-04-24 United States Of America As Represented By The Secretary Of The Army Non-lethal ammunition utilizing a dense powder ballast and a two-stage firing sequence
US20100212535A1 (en) * 2007-07-11 2010-08-26 Beal Harold F Traceable Frangible Projectile

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8308590U1 (de) * 1983-03-23 1984-08-30 Mauser-Werke Oberndorf Gmbh, 7238 Oberndorf Exerzierpatrone

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3170405A (en) * 1962-03-17 1965-02-23 Karlsruhe Augsburg Iweka Disintegrating training ammunition for firearms
US3242865A (en) * 1963-03-27 1966-03-29 Karlsruhe Augsburg Iweka Projectile
FR1438928A (fr) * 1964-07-09 1966-05-13 Rheinmetall Gmbh Projectile d'exercice désagrégeable pour armes automatiques ou manuelles
US3289585A (en) * 1964-04-23 1966-12-06 Dynamit Nobel Ag Shell construction

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3170405A (en) * 1962-03-17 1965-02-23 Karlsruhe Augsburg Iweka Disintegrating training ammunition for firearms
US3242865A (en) * 1963-03-27 1966-03-29 Karlsruhe Augsburg Iweka Projectile
US3289585A (en) * 1964-04-23 1966-12-06 Dynamit Nobel Ag Shell construction
FR1438928A (fr) * 1964-07-09 1966-05-13 Rheinmetall Gmbh Projectile d'exercice désagrégeable pour armes automatiques ou manuelles

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3785293A (en) * 1970-12-31 1974-01-15 Aai Corp Practice ammunition
US3898933A (en) * 1973-03-21 1975-08-12 Haut Rhin Manufacture Machines Training bullet for fire arms
US4716835A (en) * 1986-05-23 1988-01-05 NWM de Kruithoorn B.V., Poeldonkweg Disintegrating projectile for cartridged maneuver ammunition
US5375529A (en) * 1991-10-18 1994-12-27 Snc Industrial Technologies Inc./Les Technologies Industrielles Snc Inc. Prefragmenting munitions
US7207276B1 (en) * 2004-08-25 2007-04-24 United States Of America As Represented By The Secretary Of The Army Non-lethal ammunition utilizing a dense powder ballast and a two-stage firing sequence
US20100212535A1 (en) * 2007-07-11 2010-08-26 Beal Harold F Traceable Frangible Projectile

Also Published As

Publication number Publication date
DE1273373B (de) 1968-07-18
BE692258A (de) 1967-06-16
CH468616A (de) 1969-02-15
NO116229B (de) 1969-02-17
GB1168702A (en) 1969-10-29
AT267370B (de) 1968-12-27
NL6700078A (de) 1967-07-10
FR1507578A (fr) 1967-12-29
DK122913B (da) 1972-04-24
SE302579B (de) 1968-07-22

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