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US3749020A - Cartridge and a method of producing the same - Google Patents

Cartridge and a method of producing the same Download PDF

Info

Publication number
US3749020A
US3749020A US00176060A US3749020DA US3749020A US 3749020 A US3749020 A US 3749020A US 00176060 A US00176060 A US 00176060A US 3749020D A US3749020D A US 3749020DA US 3749020 A US3749020 A US 3749020A
Authority
US
United States
Prior art keywords
holder
projectile
case
frusto
mouth
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
US00176060A
Other languages
English (en)
Inventor
R Weymuller
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 Air Defence AG
Original Assignee
Werkzeugmaschinenfabrik Oerlikon Buhrle AG
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 Werkzeugmaschinenfabrik Oerlikon Buhrle AG filed Critical Werkzeugmaschinenfabrik Oerlikon Buhrle AG
Application granted granted Critical
Publication of US3749020A publication Critical patent/US3749020A/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
    • 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
    • F42B5/073—Mounting or locking missiles in cartridge cases using an auxiliary locking element

Definitions

  • the present invention relates to a cartridge comprising a projectile and a cartridge case formed with a neck at its forward end, and a sleeve-shaped holder for the projectile inserted into the mouth of the neck.
  • a projectile and a cartridge case formed with a neck at its forward end and a sleeve-shaped holder for the projectile inserted into the mouth of the neck, in which a portion of the holder which is conically expanded by the insertion of the projectile bears against the inside of the neck of the cartridge case.
  • the present invention also provides a method of assembling such a cartridge wherein the previously conically converging rear end of the holder is conically expanded when the tail end of the projectile is forced into the same.
  • FIG. I is a side view of a cartridge case with a sleeveshaped holder in the mouth thereof shown in part sectional view;
  • FIG. 2 is a partial elevational view with parts in section of the arrangement showing a projectile fitted into the holder;
  • FIG. 3 is a partial sectional view showing the connection between the projectile and the cartridge case as in FIG. 2 at the instant the projectile is about to leave the arrangement;
  • FIG. 4 is an elevational view of a holder provided with holes for pressure equalization
  • FIG. 5 is a similar view of a holder provided with slits for pressure equalization
  • FIG. 6 is an elevational view with parts in section of an alternative embodiment of a sleeve-shaped holder in the mouth of a cartridge case.
  • FIG. 7 is an elevational view with parts in section of the arrangement according to FIG. 6 with a projectile fitted therein.
  • a cartridge case I has a substantially cylindrical mouth 3 of smaller diameter than the remainder 2 of the case.
  • the transition between the cylindrical mouth 3 and the substantially cylindrical remainder 2 of the case forms a conical neck 4.
  • the cartridge case I contains a propellant charge 5.
  • Inserted from the front end into the mouth of the cartridge case is a cylindrical holder 6.
  • This holder 6 comprises a cylindrical sleeve-shaped part 7 which bears against the cylindrical interior of the mouth 3 of the cartridge.
  • the cylindrical holder 6 is formed with a flange 6 which projects outwards from the cylindrical sleeve-shaped part 7.
  • the flange 6 rests on the edge of the mouth 3 and thus prevents the holder 6 from being pushed further to the rear of the cartridge.
  • the cylindrical sleeve-shaped portion 7 merges into a downwardly converging frusto-conical portion 9. This rearwardly tapering portion I and part of the adjoining cylindrical sleeve-shaped portion 7 are situated within the rearwardly widening neck 6 of the cartridge case I.
  • the cylindrical tail II of a projectile III is inserted into the cylindrical holder 6.
  • the projectile I6 is fitted with a driving band 12 which is received into a peripheral groove 113. With the aid of this driving band I2 the projectile I6 rests firmly on the flange 8.
  • the projectile I6 is further provided with a peripheral groove It.
  • the sides 15 (FIG. 3) of the peripheral groove I6 diverge outwardly in the shape of a Vee.
  • the tapering portion 9 of the sleeveehaped holder 6 snaps into engagement with this peripheral groove I4 after having first been expanded by the cylindrical body 16 of the projectile when this is inserted.
  • the diameter of the body Ill) of the projectile in the region of the peripheral groove 16 exceeds the internal diameter of the undeformed tapering portion 9 at its narrowest point so that even after the tapering portion 9 has snapped into engagement with the peripheral groove 14 a forwardly adjoining part T6 of the holder 6 will still be conically expanded to make partial contact with the inside of the neck. portion 6 of the cartridge case I.
  • the holder 6 as well as the projectile III are thus prevented from detaching themselves from the mouth of the cartridge case I.
  • the distance of the peripheral groove I4 from the rear edge of the driving band 112 measured in the axial direction, should be chosen to suit the length of the sleeve-shaped holder 6 to prevent the projectile W from having too much axial clearance between its two abutments.
  • FIG. 3 shows that when the projectile III is tired by the ignition of the charge 6 the rear part of the sleeveshaped holder 6 will be inwardly curled over. This curled part lies between the conically widening part I6 and the conically tapering part 9 of the sleeve-shaped holder 6 (FIG. 2).
  • the sleeve-shaped holder 6 must be made of a material that is capable of being elastically expanded by the body of the projectile I6. Moreover, the sleeve-shaped holder 6 must always be provided with openings to admit of a rapid equalisation of pressures between the inside and outside of the wall of the holder 6 when the propellant charge is ignited. Otherwise the holder 6 might be blown out of the cartridge case ll.
  • holes l? are provided in the rearward half of the holder 6 to ensure rapid pressure equalisation.
  • longitudinal slits 116 have been cut into the rear edge of the wall of the holder 6 at regular peripheral intervals.
  • the presence of these slits I6 not only ensures an equalisation of pressures, but the number and depth of the slits also limits the holding force acting on the projectile I0 to a given maximum value, and fi nally these longitudinal slits I6 aim facilitate an elastic expansion of the conically tapering part 9 when the projectile It] is inserted into the holder and the latter snaps into engagement with the peripheral groove 14in the projectile 10.
  • the above-described cartridge is assembled by first inserting the sleeve-shaped holder 6 into the cartridge case 1 that has been previously filled with a propellant charge 5, and by then thrusting the projectile 10 into the holder 6 until the driving band 12 strikes the flange 8 of the holder.
  • the conically tapering part 9- of the holder 6 engages the peripheral groove 14 in the tail ll of the projectile, whereas its conically expanded part 16 makes contact with the tapering neck 4 of the cartridge case 1.
  • the assembly comprising projectile l and holder 6, is therefore secured against becoming detached from the mouth of the cartridge case 1. Not until the round is tired can the considerable thrusts that develop fold back the conically tapering end 9 of the holder 6 to release the projectile 10.
  • the forces which arise when the projectile is released are transmitted by the rear part of the holder 6 to the neck portion 4 of the cartridge case 1.
  • the wall of the cartridge case I is subjected substantially exclusively to radial forces and not to forces acting in the axial direction.
  • the mouth 3 in a cartridge according to the invention can be considerably shortened and a greater charge can therefore be accommodated in a cartridge of the same overall lengthwith a consequent improvement in performance.
  • a shorter cartridge can achieve the same performance as a conventional cartridge.
  • the cartridge case 1 is made of light metal, particularly of an aluminium alloy, and the holder 6 consists of steel.
  • the interior of the cartridge case 1 is provided with a protective coat to prevent the highly compressed propellant gases in the region of the mouth 3 of the cartridge case 1 from eroding and partly melting the alloy, when the charge is ignited.
  • the described novel type of connection between the projectile, the holder and the cartridge case particularly ensures that this protective coat will not be damaged.
  • the holder 6 has a rear portion 19 that has a thickened cross section.
  • the external diameter of the holder 6 is cylindrical, whereas the internal diameter is reduced to form a rearwardly convergent taper.
  • the internal diameter of the holder 6 is expanded into a cylindrical shape. Consequently the external diameter of the holder 6 in this region expands to create a divergent cone which bears against the interior of the neck portion 4 of the cartridge case 1. In this arrangement the projectile 10 is held in the holder 6 in a pure press fit.
  • a cartridge comprising:
  • a case having a cylindrical main body portion closed at the rear end thereof and containing a propellant charge, a cylindrical mouth portion of a diameter less than the diameter of said main body portion, and a hollow frusto-conical neck portion joining said main body portion and said mouth portion;
  • a holder positioned within said case and having a cylindrical sleeve portion of an outer diameter to contact the interior of said mouth portion of said case, the forward end of said sleeve portion having an annular flange extending outwardly therefrom abutting the forward edge of said mouth portion of said case, the rear end of said sleeve portion merging into a flexible rearwardly converging frustoconical portion, the length of said sleeve portion being dimensioned such that the point of juncture between said sleeve portion and said frusto-conical portion is positioned rearwardly of the juncture of said neck and mouth portions of said case when said flange abuts said edge of said mouth portion of said case; and projectile positioned in said holder in contact with the inner periphery of said sleeve portion, said projectile having adjacent the rear end thereof an annular groove the bottom edge of said frusto-conical portion fitting in said groove, said rear end of said projectile de
  • a process for assembling a cartridge comprising: providing a case having a cylindrical main body portion closed at the rear end thereof, a cylindrical mouth portion of a diameter less than the diameter of said main body portion, and a hollow frustoconical neck portion joining said main body portion and said mouth portion; providing a holder having a cylindrical sleeve portion merging at the rear end thereof into a flexible rearwardly converging frusto-conical portion;

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Toys (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Coating Apparatus (AREA)
  • Coating By Spraying Or Casting (AREA)
US00176060A 1970-09-08 1971-08-30 Cartridge and a method of producing the same Expired - Lifetime US3749020A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1336170A CH531699A (de) 1970-09-08 1970-09-08 Patrone und Verfahren zu deren Herstellung

Publications (1)

Publication Number Publication Date
US3749020A true US3749020A (en) 1973-07-31

Family

ID=4391760

Family Applications (1)

Application Number Title Priority Date Filing Date
US00176060A Expired - Lifetime US3749020A (en) 1970-09-08 1971-08-30 Cartridge and a method of producing the same

Country Status (6)

Country Link
US (1) US3749020A (de)
BE (1) BE772151A (de)
CH (1) CH531699A (de)
DE (1) DE2143605C3 (de)
FR (1) FR2107298A5 (de)
GB (1) GB1356311A (de)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3968750A (en) * 1972-03-22 1976-07-13 Nederlandsche Wapen- En Munitiefabriek "De Kruithoorn" B.V. Projectile-case connection
US4972777A (en) * 1977-10-06 1990-11-27 General Electric Company Ammunition for liquid propellant gun
US5259288A (en) * 1988-02-09 1993-11-09 Vatsvog Marlo K Pressure regulating composite cartridge
WO1995013516A1 (en) * 1993-11-08 1995-05-18 Amtech Overseas, Inc. Pressure-regulating composite cartridge with gas expansion zone
USD478961S1 (en) 2002-08-06 2003-08-26 Thomas W. Acker Weed guard
USD478960S1 (en) 2002-08-06 2003-08-26 Thomas W. Acker Weed guard
US8763535B2 (en) 2011-01-14 2014-07-01 Pcp Tactical, Llc Narrowing high strength polymer-based cartridge casing for blank and subsonic ammunition
USD715888S1 (en) 2012-01-13 2014-10-21 Pcp Tactical, Llc Radiused insert
US8869702B2 (en) * 2011-01-14 2014-10-28 Pcp Tactical, Llc Variable inside shoulder polymer cartridge
US8875633B2 (en) 2011-01-14 2014-11-04 Pcp Tactical, Llc Adhesive lip for a high strength polymer-based cartridge casing and manufacturing method
US20150192394A1 (en) * 2014-01-09 2015-07-09 Randy R. Fritz Hollow Slug and Casing
US9194680B2 (en) 2011-01-14 2015-11-24 Pcp Tactical, Llc Polymer-based machine gun belt links and cartridge casings and manufacturing method
US10794671B2 (en) 2011-01-14 2020-10-06 Pcp Tactical, Llc Polymer-based cartridge casing for subsonic ammunition
US11448491B2 (en) 2018-07-30 2022-09-20 Pcp Tactical, Llc Polymer cartridge with enhanced snapfit metal insert and thickness ratios
US20230324153A1 (en) * 2022-04-11 2023-10-12 Federal Cartridge Company Reduced tension cartridge case with two-stage neck
WO2025002886A1 (en) * 2023-06-29 2025-01-02 Rabuffo Sa Ammunition cartridge
US12247818B2 (en) 2018-07-30 2025-03-11 Pcp Tactical, Llc Polymer ammunition article designed for use across a wide temperature range
US12247819B2 (en) 2010-07-30 2025-03-11 Pcp Tactical, Llc Two-piece insert and/or flash tube for polymer ammunition cartridges

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3938122C2 (de) * 1989-11-16 1993-09-30 Diehl Gmbh & Co Geschoßpatrone

Cited By (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3968750A (en) * 1972-03-22 1976-07-13 Nederlandsche Wapen- En Munitiefabriek "De Kruithoorn" B.V. Projectile-case connection
US4972777A (en) * 1977-10-06 1990-11-27 General Electric Company Ammunition for liquid propellant gun
US5259288A (en) * 1988-02-09 1993-11-09 Vatsvog Marlo K Pressure regulating composite cartridge
WO1995013516A1 (en) * 1993-11-08 1995-05-18 Amtech Overseas, Inc. Pressure-regulating composite cartridge with gas expansion zone
USD478961S1 (en) 2002-08-06 2003-08-26 Thomas W. Acker Weed guard
USD478960S1 (en) 2002-08-06 2003-08-26 Thomas W. Acker Weed guard
US9599443B2 (en) 2010-07-30 2017-03-21 Pcp Tactical, Llc Base insert for polymer ammunition cartridges
US12247819B2 (en) 2010-07-30 2025-03-11 Pcp Tactical, Llc Two-piece insert and/or flash tube for polymer ammunition cartridges
US9989343B2 (en) 2010-07-30 2018-06-05 Pcp Tactical, Llc Base insert for polymer ammunition cartridges
US11353299B2 (en) 2011-01-14 2022-06-07 Pcp Tactical, Llc Polymer-based cartridge casing for subsonic ammunition
US9995561B2 (en) 2011-01-14 2018-06-12 Pcp Tactical, Llc Narrowing high strength polymer-based cartridge for blank and subsonic ammunition
US12410994B2 (en) 2011-01-14 2025-09-09 Pcp Tactical, Llc Polymer-based cartridge casing for subsonic ammunition
US9194680B2 (en) 2011-01-14 2015-11-24 Pcp Tactical, Llc Polymer-based machine gun belt links and cartridge casings and manufacturing method
US9261335B2 (en) 2011-01-14 2016-02-16 Pcp Tactical, Llc Frangible portion for a high strength polymer-based cartridge casing and manufacturing method
US9372054B2 (en) 2011-01-14 2016-06-21 Pcp Tactical, Llc Narrowing high strength polymer-based cartridge casing for blank and subsonic ammunition
US9003973B1 (en) 2011-01-14 2015-04-14 Pcp Tactical, Llc Narrowing high strength polymer-based cartridge casing for blank and subsonic ammunition
US8763535B2 (en) 2011-01-14 2014-07-01 Pcp Tactical, Llc Narrowing high strength polymer-based cartridge casing for blank and subsonic ammunition
US8875633B2 (en) 2011-01-14 2014-11-04 Pcp Tactical, Llc Adhesive lip for a high strength polymer-based cartridge casing and manufacturing method
US8869702B2 (en) * 2011-01-14 2014-10-28 Pcp Tactical, Llc Variable inside shoulder polymer cartridge
US11976911B2 (en) 2011-01-14 2024-05-07 Pcp Tactical, Llc Polymer-based cartridge casing for subsonic ammunition
US10794671B2 (en) 2011-01-14 2020-10-06 Pcp Tactical, Llc Polymer-based cartridge casing for subsonic ammunition
USD715888S1 (en) 2012-01-13 2014-10-21 Pcp Tactical, Llc Radiused insert
USD765214S1 (en) 2012-01-13 2016-08-30 Pcp Tactical, Llc Radiused insert
US9395163B2 (en) * 2014-01-09 2016-07-19 Randy R. Fritz Hollow slug and casing
US20150192394A1 (en) * 2014-01-09 2015-07-09 Randy R. Fritz Hollow Slug and Casing
US12163770B2 (en) 2018-07-30 2024-12-10 Pcp Tactical, Llc Polymer cartridge with enhanced snapfit metal insert and thickness ratios
US12247818B2 (en) 2018-07-30 2025-03-11 Pcp Tactical, Llc Polymer ammunition article designed for use across a wide temperature range
US11448491B2 (en) 2018-07-30 2022-09-20 Pcp Tactical, Llc Polymer cartridge with enhanced snapfit metal insert and thickness ratios
US20230324153A1 (en) * 2022-04-11 2023-10-12 Federal Cartridge Company Reduced tension cartridge case with two-stage neck
US12359899B2 (en) * 2022-04-11 2025-07-15 Federal Cartridge Company Reduced tension cartridge case with two-stage neck
WO2025002886A1 (en) * 2023-06-29 2025-01-02 Rabuffo Sa Ammunition cartridge

Also Published As

Publication number Publication date
CH531699A (de) 1972-12-15
DE2143605B2 (de) 1973-08-02
GB1356311A (en) 1974-06-12
DE2143605C3 (de) 1974-02-28
FR2107298A5 (de) 1972-05-05
BE772151A (fr) 1972-01-17
DE2143605A1 (de) 1972-03-16

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