US3882777A - Cartridge for firearms - Google Patents

Cartridge for firearms Download PDF

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Publication number
US3882777A
US3882777A US351313A US35131373A US3882777A US 3882777 A US3882777 A US 3882777A US 351313 A US351313 A US 351313A US 35131373 A US35131373 A US 35131373A US 3882777 A US3882777 A US 3882777A
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US
United States
Prior art keywords
projectile
sabot
cartridge
weapon
bore
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
US351313A
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English (en)
Inventor
Gad Anders Rausing
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.)
Tetra Pak Developpement SA
Original Assignee
LADCO ENTERPRISES Ltd
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 LADCO ENTERPRISES Ltd filed Critical LADCO ENTERPRISES Ltd
Application granted granted Critical
Publication of US3882777A publication Critical patent/US3882777A/en
Assigned to TETRA PAK DEVELOPPEMENT SA reassignment TETRA PAK DEVELOPPEMENT SA ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: LADCO ENTERPRISES, LTD.
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
    • F42B14/00—Projectiles or missiles characterised by arrangements for guiding or sealing them inside barrels, or for lubricating or cleaning barrels
    • F42B14/06—Sub-calibre projectiles having sabots; Sabots therefor
    • F42B14/061—Sabots for long rod fin stabilised kinetic energy projectiles, i.e. multisegment sabots attached midway on the projectile
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B14/00—Projectiles or missiles characterised by arrangements for guiding or sealing them inside barrels, or for lubricating or cleaning barrels
    • F42B14/06—Sub-calibre projectiles having sabots; Sabots therefor
    • F42B14/064—Sabots enclosing the rear end of a kinetic energy projectile, i.e. having a closed disk shaped obturator base and petals extending forward from said base
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B14/00—Projectiles or missiles characterised by arrangements for guiding or sealing them inside barrels, or for lubricating or cleaning barrels
    • F42B14/06—Sub-calibre projectiles having sabots; Sabots therefor
    • F42B14/08—Sabots filled with propulsive charges; Removing sabots by combustion of pyrotechnic elements or by propulsive-gas pressure

Definitions

  • ABSTRACT A cartridge for a firearm comprises a projectile having a cross-sectiona1 area smaller than that of the bore of the weapon,the projectile being provided with a shoe the size of which fits into the bore of the weapon.
  • the present invention relates to a cartridge for firearms, comprising a projectile the cross-sectional area of which is smaller than the cross-sectional area of the bore of the arms, in conjunction with which the cartridge is intended to be used.
  • subcaliber projectiles that is to say projectiles whose cross-sectional area is smaller than the bore of the arms by means of which the projectile is to be shot off.
  • subcaliber projectiles are usually called flechettes and can best be compared to miniature darts, which are often provided with fins so as to stabilize the trajectory and consequently achieve better accuracy of fire.
  • the reason for wanting to change over from conventional projectiles to flechettes is among other things, that it so becomes possible to achieve flatter trajectories and lower projectile weight.
  • the problem which arises when conventional projectiles are replaced by flechettes is that of obtaining a sufficiently large propelling surface for the powder gases without such devices for obtaining a large propelling surface bringing about increased air resistance in the trajectory.
  • flechettes As projectiles in small arms ammunition and automatic arms ammunition. To achieve sufficient firing range and effect such flechettes must have a starting velocity which is as high as possible, in most cases 1.000-l.500 m/sec, which can be compared with approx. 700l.000 m/sec for conventional projectiles. Higher muzzle velocities than 900-l.000 m/sec can hardly be achieved in conventional arms with conventional projectiles other than by the use of a very long barrel and very high propelling pressure, which of course in turn decisively affects the appearance and the construction of the arms.
  • the material thickness in the barrels must be relatively great, for another thing the locking mechanism in the bolt must be made very strong so as to stand the high pressure, which results in a heavy and clumsy weapon, and furthermore, since the temperature gradient in the inner layer of the barrel may go up to several thousand degrees and the gas velocity is very great, the wear of the barrel is enormous and its life is short.
  • a corresponding device is hardly practical for application on cartridges in small arms ammunition, mainly because the cartridges in such a case would become enormously expensive to manufacture, but in accordance with the invention the problem can be solved in a different manner, in that the sabot is made multipart and the parts of the sabot are held together before the firing of the cartridge by a combustible body, which burns up completely before the projectile has left the muzzle of the arms.
  • FIG. 1 shows a caseless cartridge with a flechette projectile
  • FIG. 2 shows a normal cartridge provided with case with flechette projectile
  • FIG. 3 finally shows a view of the cartridges according to FIGS. 1 and 2 seen from the front.
  • the cartridge shown in FIG. 1 consists of a needleshaped projectile, a so-called flechette l which is provided with a recess 7 to accomodate a sabot 2 and with a fin 4.
  • the sabot 2 comprises two or more sections which are combined to a unit which differes most closely an annular washer whose inside part is adapted to be accomodated in the recess 7 of the flechette 1.
  • the sabot 2 consists appropriately of metal or some metal alloy, e.g., steel or brass, and the outer circular surface 8 must be machined to a surface fineness and true measurement which correspond to the demand made in respect of the achievement of complete tightness against the walls in the bore of the weapon.
  • the sabot 2 has an annular recess 6 which extends through all the parts of which the sabot is composed. In the example shown in FIG.
  • the parts of which the sabot is composed are held together with the help of a compressed powder mass 3 which at the same time constitutes the propellent charge of the cartridge.
  • a sealing washer 5 which can be manufactured of a combustible material, which however has to burn more slowly than the powder charge since the seal 5 must maintain its tightening function during the whole time whilst the powder charge 3 is burning.
  • the cartridge shown in FIG. 1 is thus not provided with any case outside the projectile, the sabot sealing device being held together by the cast powder mass 3.
  • a cartridge of this type is of course cheaper in its manufacture than a cartridge with case, and it will moreover be appreciably lighter especially as the weight of the projectile in this case will be appreciably lower than the weight of a normal projectile.
  • FIG. 2 is shown a variant of the cartridge shown in FIG. 1 in accordance with the invention, and in the example shown here the cartridge is provided with a case 9 of brass or similar material, which case in a known manner is provided with propellent charge and igniting device for the powder charge accomodated in the case 9.
  • the projectile l is provided as in the previous example with a recess 7, in which is arranged the sabot 2 and as in the earlier described case the sabot 2 consists of two or more sections, which are combined into a unit and which sections 2 are held together by a strip 10 of combustible plastic material.
  • FIG. 3 a view from the front of the projectile 1 with sabot 2, which in the case illustrated is divided into three sections, namely 2a, 2b and 20 which are arranged so that they are fitted against one another with a good fit.
  • the propellent charge in the case 9 is ignited and the projectile 1 together with the sabot 2 is in tight contact along its cylindrical surface 8.
  • the plastic ring or plastic strip 10 which holds together the parts of the sabot 2 will burn and the plastic strip 10 is dimensioned in such a manner that it will be completely burnt up before the projectile 1 has reached the muzzle of the barrel.
  • cartridges in accordance with the invention are very reliable in their function and are moreover cheap to manufacture, and it is possible consequently to use cartridges in accordance with the invention to achieve a firing range, accuracy of fire and effect of the projectile which cannot be achieved with conventional cartridges.
  • a cartridge for firearms comprising a projectile having a cross-sectional area smaller than the crosssectional area of the bore of the weapon in which the cartridge is to be used and provided with an annular recess thereabout, a plurality of metal sabot sections forming together a sabot surrounding and engaging the annular recess of said projectile, said sabot sections when assembled including an annular recess on the rear face of said sabot, the outer circumference of said sections forming a close seal with the bore of the weapon and means of combustible material engaging the annular recess in the rear face of the assembled sabot sections for securing said sabot sections together around said projectile, said combustile securing means being consumed by combustion when the weapon is tired before the projectile leaves the muzzle of the bore whereby the sabot sections disengage from said projectile after leaving the bore of the weapon.
  • a cartridge as claimed in claim 1 wherein said combustible securing means consists of a mass of pressed powder to assist in propelling the projectile from the bore of the weapon.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Portable Nailing Machines And Staplers (AREA)
US351313A 1972-04-20 1973-04-16 Cartridge for firearms Expired - Lifetime US3882777A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7205163A SE377840B (enrdf_load_stackoverflow) 1972-04-20 1972-04-20

Publications (1)

Publication Number Publication Date
US3882777A true US3882777A (en) 1975-05-13

Family

ID=20265848

Family Applications (1)

Application Number Title Priority Date Filing Date
US351313A Expired - Lifetime US3882777A (en) 1972-04-20 1973-04-16 Cartridge for firearms

Country Status (5)

Country Link
US (1) US3882777A (enrdf_load_stackoverflow)
CH (1) CH565362A5 (enrdf_load_stackoverflow)
DE (1) DE2319705C3 (enrdf_load_stackoverflow)
FR (1) FR2180990B1 (enrdf_load_stackoverflow)
SE (1) SE377840B (enrdf_load_stackoverflow)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4109582A (en) * 1975-11-15 1978-08-29 Rheinmetall Gmbh Twist-reducing rings for stabilized projectiles
FR2529319A1 (fr) * 1978-08-24 1983-12-30 Rheinmetall Gmbh Munition comportant une charge propulsive et un projectile stabilise par ailettes
US4598644A (en) * 1981-12-05 1986-07-08 Rheinmetall Gmbh Use of a portion of a propellant charge as a seal
US4671182A (en) * 1984-10-24 1987-06-09 Voest-Alpine Aktiengesellschaft Inertia projectile or sub-caliber
US4735148A (en) * 1986-03-18 1988-04-05 United Technologies Corporation Plastic composite sabot
US5148750A (en) * 1981-12-24 1992-09-22 Rheinmetall Gmbh Unitary projectile
US20070056461A1 (en) * 2005-06-10 2007-03-15 Diehl Bgt Defence Gmbh & Co., Kg Weapon system with caseless ammunition
US7934456B1 (en) * 2008-11-20 2011-05-03 Rheinmetall Waffe Munition Gmbh Sabot projectile

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2924041C2 (de) * 1979-06-15 1983-09-08 Rheinmetall GmbH, 4000 Düsseldorf Treibkäfig für ein unterkalibriges Treibkäfiggeschoß
DE3021914A1 (de) * 1980-06-11 1983-09-08 Deutsch Franz Forsch Inst Unterkalibergeschoss mit treibring
DE3031722A1 (de) * 1980-08-23 1986-10-09 Rheinmetall GmbH, 4000 Düsseldorf Wuchtgeschossanordnung mit spitzenseitigem treibkaefig
FR2611889B1 (fr) * 1987-03-05 1991-06-07 France Etat Armement Munition notamment pour artillerie comportant un projectile et une douille
DE102008049146A1 (de) * 2008-09-26 2010-04-01 Rheinmetall Waffe Munition Gmbh Treibkäfiggeschoss

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2389846A (en) * 1941-08-26 1945-11-27 George R Ericson High velocity projectile
US2423453A (en) * 1942-05-13 1947-07-08 James V Howe Projectile
US3033116A (en) * 1958-05-20 1962-05-08 John L Critcher Ammunition
US3107615A (en) * 1962-08-01 1963-10-22 James J Brady Non-lethal discarding device
US3125957A (en) * 1964-03-24 lipinski
US3148472A (en) * 1962-06-11 1964-09-15 Edward N Hegge Subcaliber projectile and sabot for high velocity firearms
US3262391A (en) * 1964-10-12 1966-07-26 Budd Co Subcaliber projectile and sabot
US3318244A (en) * 1965-07-01 1967-05-09 Charles E Rostocil Cartridge
US3427648A (en) * 1953-05-26 1969-02-11 Henry P Manning Missiles and gun barrels for eliminating sabots therefrom

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3125957A (en) * 1964-03-24 lipinski
US2389846A (en) * 1941-08-26 1945-11-27 George R Ericson High velocity projectile
US2423453A (en) * 1942-05-13 1947-07-08 James V Howe Projectile
US3427648A (en) * 1953-05-26 1969-02-11 Henry P Manning Missiles and gun barrels for eliminating sabots therefrom
US3033116A (en) * 1958-05-20 1962-05-08 John L Critcher Ammunition
US3148472A (en) * 1962-06-11 1964-09-15 Edward N Hegge Subcaliber projectile and sabot for high velocity firearms
US3107615A (en) * 1962-08-01 1963-10-22 James J Brady Non-lethal discarding device
US3262391A (en) * 1964-10-12 1966-07-26 Budd Co Subcaliber projectile and sabot
US3318244A (en) * 1965-07-01 1967-05-09 Charles E Rostocil Cartridge

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4109582A (en) * 1975-11-15 1978-08-29 Rheinmetall Gmbh Twist-reducing rings for stabilized projectiles
FR2529319A1 (fr) * 1978-08-24 1983-12-30 Rheinmetall Gmbh Munition comportant une charge propulsive et un projectile stabilise par ailettes
US4598644A (en) * 1981-12-05 1986-07-08 Rheinmetall Gmbh Use of a portion of a propellant charge as a seal
US5148750A (en) * 1981-12-24 1992-09-22 Rheinmetall Gmbh Unitary projectile
US4671182A (en) * 1984-10-24 1987-06-09 Voest-Alpine Aktiengesellschaft Inertia projectile or sub-caliber
US4735148A (en) * 1986-03-18 1988-04-05 United Technologies Corporation Plastic composite sabot
US20070056461A1 (en) * 2005-06-10 2007-03-15 Diehl Bgt Defence Gmbh & Co., Kg Weapon system with caseless ammunition
US20110120336A1 (en) * 2008-09-26 2011-05-26 Rheinmetall Waffe Munition Gmbh Sabot projectile
US7934456B1 (en) * 2008-11-20 2011-05-03 Rheinmetall Waffe Munition Gmbh Sabot projectile

Also Published As

Publication number Publication date
CH565362A5 (enrdf_load_stackoverflow) 1975-08-15
SE377840B (enrdf_load_stackoverflow) 1975-07-28
FR2180990A1 (enrdf_load_stackoverflow) 1973-11-30
FR2180990B1 (enrdf_load_stackoverflow) 1977-09-02
DE2319705B2 (de) 1980-01-17
DE2319705C3 (de) 1980-09-18
DE2319705A1 (de) 1973-10-25

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Legal Events

Date Code Title Description
AS Assignment

Owner name: TETRA PAK DEVELOPPEMENT SA, P.O. BOX 181, CH-1009

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:LADCO ENTERPRISES, LTD.;REEL/FRAME:004366/0561

Effective date: 19850204