US3776136A - Ammunition arrangement - Google Patents

Ammunition arrangement Download PDF

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Publication number
US3776136A
US3776136A US00214191A US3776136DA US3776136A US 3776136 A US3776136 A US 3776136A US 00214191 A US00214191 A US 00214191A US 3776136D A US3776136D A US 3776136DA US 3776136 A US3776136 A US 3776136A
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US
United States
Prior art keywords
bore
cup
longitudinally
longitudinally extending
cartridge
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
US00214191A
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English (en)
Inventor
M Dix
Costa N La
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.)
Textron Systems Corp
Original Assignee
AAI Corp
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 AAI Corp filed Critical AAI Corp
Application granted granted Critical
Publication of US3776136A publication Critical patent/US3776136A/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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C19/00—Details of fuzes
    • F42C19/08—Primers; Detonators
    • F42C19/0823—Primers or igniters for the initiation or the propellant charge in a cartridged ammunition

Definitions

  • This invention relates to cartridge arrangements, and more particularly to cartridge arrangements employing high-low propellant gas chamber arrangements for initially containing propellant mix within a high pressure zone, to assist in, and control the rate of, burning of the propellant, and subsequently permitting the propellant gases to flow into an enlarged zone at a lower pressure in the course of propulsion of a projectile from the cartridge.
  • High-low ballistic systems have been employed previously in cartridge arrangements, for .the purpose of controlling the burning rate of the propellant.
  • One common prior art arrangement employs a unitary node in the base of the cartridge case, which has rupturable side openings therein forming initially closed gasports which are subsequently opened by rupturingof a membrane over the gas ports.
  • the burning of the propellant contained within the node is assisted by the initial restraint exerted by the initially substantially totally closed node, such that the gas pressure builds up, prior to rupture, to effect a desired rate and extent of'burning of the propellant.
  • the burning rate iscontrolled by both the initial restraint afforded by the closed gas ports, and by the size of the gas ports through which the gas may pass after rupture of the gas port seals.
  • It is a further feature of the invention to provide an improved high-low ballistic cartridge arrangement which utilizes a propellant burning control cup which is longitudinally expandable, to maintain a controlled high pressure retention chamber during initial burning of the propellant, and which is subsequently ejected forwardly from its retained position as a function of its expansion, and without requiring rupture thereof, to thereby enable the propellant gases to flow into a larger chamber area at a lower pressure for propulsion of the projectile from the cartridge.
  • FIG. 1 is a longitudinal section view of a cartridge according to the invention.
  • FIG. 2 is a longitudinal section view showing the cartridge of FIG. 1 in the course of firing, the propellant burning control cup being schematically illustrated in its configuration after forward expansion and release from its initially retained position in the cartridge case.
  • ahigh-low ballistic cartridge 11 having a case 21 and a projectile 4'1.
  • Projectile 41 may be of any suitable or desired configuration and construction, such being illustratively shown as a unitary mass having an ogive shaped forward end 43, with a central annular retention groove 47 which enables retention in the cartridge case 21, as through the crimping of the forward end of the case wall 23 as indicated at 23f.
  • the curved rear end zone 45 of the projectile may be suitably lo cated by a shoulder 23b formed between the enlarged bore 23a of case wall 23 and'a further enlarged bore section 230.
  • the case wall 23 which is open at its forward end to receive and contain the projectile 41,
  • a primer 6 which may be a conventional percussion primer, is press-fit or otherwise secured in a bore 25b in case base 25, which communicates through a flash ignition passageway 27 with the interior of cup 31.
  • a desired propellant mix 51 which may be of conventional or other desired composition, is contained within the chamber formed by the base end of bore 25a and the cup 31.
  • Propellant burning control cup 31 takes the form of a plurality of longitudinally extending tube sections 33 and 35, connected through an integral annular reverse bend 34, the inner tube section being closed at its forward end by an integral web section 37.
  • the outer tube section 33 extends forwardly of the base wall 25b and engages with the rear surface 45 of projectile 41. This engagement is advantageously effected in the illustrative embodiment by flaring the forward end of the tube section 33, as indicated at 33a.
  • the cup 31 is bottomed in bore 25a with its reverse bend 34 engaging with the bottom wall 25c at the end of bore 250, and the inner tube section 35 may be provided with a sufficient longitudinal extent to contain a desired quantity of propellant mix 51, while the extended length of tube section 33 is sufficient to enable the tube section 35 to be rolled forwardly to an extent sufficient to enable the cup 31 to be released from engagement with the bore 25a prior to engagement of the forwardly movable closed forward end 37 with the projectile 41.
  • the cup 31 is preferably press-fit, as with a light press-fit, into bore 25a, to provide a full fluid seal in the prefired portion of the cup 31.
  • the propellant burning control cup 41 may be formed of various suitable malleable materials, which have the characteristic of affording sufficient stiff columnar compressive strength to enable retention action by the projectile 41 on the tube section 33 during the initial burning of the propellant 51, while enabling plastic cold flow sequential incremental rolling of the tube section 33 through reverse bend 34 and inwardly to form an extension of tube section 35, and being of sufficient rupture strength to enable containment of the gas at the burning pressures without rupture in the course of the forward rolling expansion and subsequent essentially self-release and pressure-responsive forward expulsion of the cup 31.
  • suitable materials are aluminum, brass, nickel, and steel, although it will be apparent that other materials may also be employed which provide the desired characteristics as noted above, in a particular illustrative embodiment.
  • an aluminum cup 31 having a wall thickness of between 0.010 inch and 0.060 inch may be suitably employed, it being apparent that the particular wall thickness for a particular material will be a determining factor for both the column strength of the tube section 33 and the resistance to in-rolling of the tube section 33 through reverse bend 34, and therefore also affects the rate of unrolling for a given propellant burning pressure, thus exerting a control function on the propellant burning rate and peak pressure of the burning propellant 51.
  • the particular choice of materials, thickness of tube section, and size of the chamber formed by the cup 31 may be readily determined for a given required use, as one skilled in the art may find desirable and/or necessary.
  • the cartridge 11 may be conventionally chambered and fired in a suitable barrel as indicated in FIG. 2 at 71, as through the medium of a percussion firing pin, not shown.
  • the propellant mix 51 is ignited by flash ignition through passageway 27 from primer 61, and burning of the propellant 51 causes a substantial increase of pressure within the chamber formed by inner tube section 35 and wall 37 of the cup 31. This increase in pressure exerts a corresponding substantial force on the cup walls 35 and 37.
  • the mass and inertia of projectile 41 together with the retentive gripping exerted by crimp 23f and groove 47, prevent the cup 31 from being ejected from bore 25a during the initial burning of the propellant.
  • the propellant gas pressures thus act to enlarge the chamber formed by walls 35 and 37 of the cup 31, this action taking the effect of longitudinally moving the wall 37 forwardly through sequential incremental reverse rolling of the outer tube section 33 through reverse bend 34 and inwardly into and forming an extension of tube section 35, as generally indicated in broken lines in FIG. 1.
  • the primary expansion of this chamber is efiected by this longitudinal rolling action, although there is some small lateral expansion effected on the inner tube wall section 35 as schematically illustrated in this Figure as well as in FIG. 2.
  • the propellant burning chamber is thus maintained in a relatively small size, while increasing to a sufficiently small extent as to maintain adequate burning of the propellant for desirably complete propellant combustion.
  • the burning control cup 31 may be expected to be propelled forward with the projectile 41 during the movement of the projectile from the cartridge case 21, although at some point downstream the air resistance will cause the high resistance, low mass tube section 31 to drop away from the projectile 41 and fall to the ground, while the projectile 41 continues toward its target.
  • a unitary projectile which is in direct contact with the cup 31
  • different projectiles may be employed, such as multiple projectiles, and/or a sabot may be employed for the projectile or projectiles, in which latter event the sabot may be disposed between the projectile and the propellant burning control cup to effect the desired retention resistance on the cup during initial firing of the cartridge. Accordingly, the invention is not to be limited by the particular illustrative embodiment, but only by the scope of the appended claims.
  • a cartridge arrangement comprising a cartridge case a first bore formed in said case for receivinga projectile to be launched therefrom,
  • a longitudinally plastically deformably expandable and longitudinally expellable propellant burning control cup formed of material capable of -coldflow substantially permanent plastic deformation
  • a cartridge arrangement comprising a cartridge case a first bore formed in said case for receiving a projectile to be launched therefrom,
  • a longitudinally plastically deformably expandable and longitudinally expellable propell'antburning control cup formed of material capable of cold flow substantially permanent plastic deformation, disposed in said second smaller bore
  • said cup having a plurality of longitudinally extending wall sections, an annular reverse bend formed between first and second said longitudinally extending annular wall sections,
  • said cup being longitudinally expandable through sequential incremental cold-flow rolling movement of the material of one of said longitudinally extending cup wall sections through said reverse bend and I thence to a longitudinally elongated continuation of the adjoining other said longitudinally extending cup wall section.
  • said other longitudinally extending wall section which has said central closure thereacross being connected to said effectively laterally'outerlongi tudinally extending cup wall section through said annular reverse bend.
  • said eflectively laterally outer longitudinally extend ing cup wall section being in press fit -annular sealing engagement with the annular wall forming said second bore.
  • said effectively laterally-outer longitudinally extending cup wall section being in annular sealing engagement with the annular wall forming said second bore.
  • a cartridge arrangement comprising a cartridge case a first bore formed in said case for receiving a projectile to be launched therefrom,
  • said cup having an outer wall with an open forward end and having a closed base end, a reverse dimple formed in said closed base end and extending toward said open forward end,
  • a cartridge arrangement comprising a cartridge case a first bore formed in said case for receiving a projectile to be launched therefrom,
  • said cup being removable from said bore after substantial longitudinal deformation elongation of the effective interior of said cup.
  • said cup having a plurality of longitudinally extending wall sections, an annular reverse bend formed between first and second said longitudinally extending annular wall sections,
  • said cup being longitudinally expandable through sequential incremental cold-flow rolling movement of the material of one of said longitudinally extending cup wall sections through said reverse bend and thence to a longitudinally elongated continuation of the adjoining other said longitudinally extending cup wall section.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Toys (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
US00214191A 1971-12-30 1971-12-30 Ammunition arrangement Expired - Lifetime US3776136A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US21419171A 1971-12-30 1971-12-30

Publications (1)

Publication Number Publication Date
US3776136A true US3776136A (en) 1973-12-04

Family

ID=22798138

Family Applications (1)

Application Number Title Priority Date Filing Date
US00214191A Expired - Lifetime US3776136A (en) 1971-12-30 1971-12-30 Ammunition arrangement

Country Status (7)

Country Link
US (1) US3776136A (OSRAM)
JP (1) JPS5148000B2 (OSRAM)
CA (1) CA984222A (OSRAM)
CH (1) CH571205A5 (OSRAM)
DE (1) DE2262981C3 (OSRAM)
GB (1) GB1394705A (OSRAM)
IL (1) IL41081A (OSRAM)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3967552A (en) * 1974-12-17 1976-07-06 The United States Of America As Represented By The Secretary Of The Army Percussion ignition system for a smokeless, flashless, low noise cartridge
FR2925666A1 (fr) * 2007-12-20 2009-06-26 Verney Carron Sa Sa Munition d'arme a feu de gros calibre pour le tir d'un projectile constitue par au moins un corps spherique
USD813974S1 (en) * 2015-11-06 2018-03-27 Vista Outdoor Operations Llc Cartridge with an enhanced ball round
US10107608B2 (en) * 2015-02-10 2018-10-23 Salvatore Tedde Cartridge for light weapons
USD848569S1 (en) 2018-01-20 2019-05-14 Vista Outdoor Operations Llc Rifle cartridge
US10551154B2 (en) 2017-01-20 2020-02-04 Vista Outdoor Operations Llc Rifle cartridge with improved bullet upset and separation

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3507643A1 (de) * 1985-03-05 1986-09-11 Nico-Pyrotechnik Hanns-Jürgen Diederichs GmbH & Co KG, 2077 Trittau Patronierte munition
FR2630203B1 (fr) * 1988-04-13 1993-03-26 Verney Carron Sa Munition pour la propulsion a basse pression de projectiles volumineux de faible masse
DE8812000U1 (de) * 1988-09-22 1990-02-08 Rheinmetall GmbH, 4000 Düsseldorf Granatengeschoß
RU2117905C1 (ru) * 1996-03-27 1998-08-20 Конструкторское бюро приборостроения Патрон с нелетально поражающим элементом
DE102012014043B4 (de) 2012-07-14 2014-02-13 Diehl Bgt Defence Gmbh & Co. Kg Granate, insbesondere 40-mm-Granate

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US562535A (en) * 1896-06-23 Harris p
FR1255993A (fr) * 1960-02-01 1961-03-17 Perfectionnements apportés aux cartouches d'armes à feu
US3234877A (en) * 1964-04-27 1966-02-15 Herter Inc S Shotgun shell wad with powder pocket
US3288066A (en) * 1964-03-10 1966-11-29 Dynamit Nobel Ag Cartridge case
US3289584A (en) * 1964-04-18 1966-12-06 Dynamit Nobel Ag Mortar ammunition
US3404598A (en) * 1966-12-30 1968-10-08 Aai Corp Cup-sealed actuator with obturating groove anchoring and sealing arrangement

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US562535A (en) * 1896-06-23 Harris p
FR1255993A (fr) * 1960-02-01 1961-03-17 Perfectionnements apportés aux cartouches d'armes à feu
US3288066A (en) * 1964-03-10 1966-11-29 Dynamit Nobel Ag Cartridge case
US3289584A (en) * 1964-04-18 1966-12-06 Dynamit Nobel Ag Mortar ammunition
US3234877A (en) * 1964-04-27 1966-02-15 Herter Inc S Shotgun shell wad with powder pocket
US3404598A (en) * 1966-12-30 1968-10-08 Aai Corp Cup-sealed actuator with obturating groove anchoring and sealing arrangement

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3967552A (en) * 1974-12-17 1976-07-06 The United States Of America As Represented By The Secretary Of The Army Percussion ignition system for a smokeless, flashless, low noise cartridge
FR2925666A1 (fr) * 2007-12-20 2009-06-26 Verney Carron Sa Sa Munition d'arme a feu de gros calibre pour le tir d'un projectile constitue par au moins un corps spherique
US10107608B2 (en) * 2015-02-10 2018-10-23 Salvatore Tedde Cartridge for light weapons
USD813974S1 (en) * 2015-11-06 2018-03-27 Vista Outdoor Operations Llc Cartridge with an enhanced ball round
USD884821S1 (en) * 2015-11-06 2020-05-19 Vista Outdoor Operations Llc Enhanced ball round
US10551154B2 (en) 2017-01-20 2020-02-04 Vista Outdoor Operations Llc Rifle cartridge with improved bullet upset and separation
US11280595B2 (en) 2017-01-20 2022-03-22 Vista Outdoor Operations Llc Rifle cartridge with improved bullet upset and separation
USD848569S1 (en) 2018-01-20 2019-05-14 Vista Outdoor Operations Llc Rifle cartridge

Also Published As

Publication number Publication date
GB1394705A (en) 1975-05-21
CA984222A (en) 1976-02-24
IL41081A (en) 1976-10-31
JPS5148000B2 (OSRAM) 1976-12-17
DE2262981B2 (de) 1980-06-04
JPS4874099A (OSRAM) 1973-10-05
CH571205A5 (OSRAM) 1975-12-31
IL41081A0 (en) 1973-03-30
DE2262981C3 (de) 1981-02-05
DE2262981A1 (de) 1973-07-05

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