US2940391A - Encased projectile - Google Patents

Encased projectile Download PDF

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Publication number
US2940391A
US2940391A US733900A US73390058A US2940391A US 2940391 A US2940391 A US 2940391A US 733900 A US733900 A US 733900A US 73390058 A US73390058 A US 73390058A US 2940391 A US2940391 A US 2940391A
Authority
US
United States
Prior art keywords
projectile
fins
chamber
case
encased
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
US733900A
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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.)
Anstalt Fuer die Entwicklung von Erfindungen und Gewerblichen Anwendungen ENERGA
Original Assignee
Anstalt Fuer die Entwicklung von Erfindungen und Gewerblichen Anwendungen ENERGA
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 Anstalt Fuer die Entwicklung von Erfindungen und Gewerblichen Anwendungen ENERGA filed Critical Anstalt Fuer die Entwicklung von Erfindungen und Gewerblichen Anwendungen ENERGA
Application granted granted Critical
Publication of US2940391A publication Critical patent/US2940391A/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
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B10/00—Means for influencing, e.g. improving, the aerodynamic properties of projectiles or missiles; Arrangements on projectiles or missiles for stabilising, steering, range-reducing, range-increasing or fall-retarding
    • F42B10/02—Stabilising arrangements
    • F42B10/14—Stabilising arrangements using fins spread or deployed after launch, e.g. after leaving the barrel

Definitions

  • the purpose of the present invention is to remedy the above-mentioned drawbacks and it has as its object a projectile which has an empennage and is enclosed inside a casing, the fins of the empennage extending to the rear beyond the end of the tail which supports the empennage, the said casing comprising in its base a powder chamber, the metal Wall of which is provided with orifices and disposed facing the inner face of the fins of the empennage, and wherein the said orifices open between the fins only, the projectile and its case comprising means for securing them together in a determined angular position.
  • the powder chamber contains the whole of the propellant charge so that all the powder burns in the interior of the said chamber.
  • the previously mentioned chamber has a constant volume, keeping the Whole of the propellant charge at a constant density, the combustion then proceeding in a regular manner from one round to the next.
  • the upper part of the powder chamber forms a seating for the support of the rear of the projectile.
  • Fig. 1 shows an elevation, with part broken away, of an empennaged projectile enclosed in a cartridge case
  • Fig. 2 is a partial view, on a larger scale, of the enclosed projectile, the case and the powder chamber being in longitudinal section and Fig. 3 is a partial transverse section taken on the line 3-3 in Fig. 1.
  • The-projectile 1 comprises a rear part 2 at the end of which there are three spread-out fins 3 which are articulated in a fin support 4.
  • a case 5, preferably of brass or alloy of aluminum, in which the-projectile 1.is encased, comprises at its base a steel chamber 6.
  • Thesaid chamber which is in general. of a shape like atruncated cone and of which the wall, orientated to face the inner face of the fins, is provided with orifices 7, contains a propellant charge 8.
  • the holes 7 are distributed in such a manner that none of them opens directly opposite the inner face of the fins 3; thus the chamber 6 comprises meridional zones which are not perforated. It follows that the gases from the charge are ejected equally into each of the sections of the case marked out by the fins through the orifices 7 and that the dynamic pressure of the gases is uniformly distributed over every part of each fin.
  • the case 5 and the chamber 6 constitute between them a free annular space, to the bottom of-which the empennage fins can extend, the entire propellant charge being contained in the said chamber.
  • the rear end 10 of the projectile can rest on the top of the powder chamber 6 which thus assumes the character of a support for the projectile.
  • This arrangement obviates all stress on the empennage as the result of the projectiles becoming forced into the casing during transport and handling or when the gun is being loaded.
  • the chamber '6 is secured by its base to a steel ring 11 constituting the base of the cartridge case and screwed into the latter. It follows from this that one can insert and remove the charge without separating the projectile from its case.
  • the projectile 1 is enclosed in the case 5 in such a way that the inner surface of each fin comes opposite the unperforated meridional zone of the chamber 6.
  • the case 5 is secured to the projectile 1, in a predetermined angular position, by the inward protuberance of the said case (Fig. 1) at three points 12, in which operation the case is pressed into corresponding recesses in the body of the projectile.
  • a projectile to be fired from a rifled gun a cartridge case within which said projectile is encased, said projectile comprising a body, a base at the rear of said body, said base carrying a forwardly pivoted folded fin assembly opening out rearwardly and formed with a plurality of fins, each of said fins extending, in folded position and over the greater part of its length, rearw-ardly of the base .of the projectile, a powder chamber fixed to the rear end of the cartridge case and having perforations separated by a number [of non-perforated longitudinal zones, cooperating means on the projectile and on the cartridge case for securing said pants together in a predetermined relation in which each of said fins is placed opposite a non-perforated zone of said powder chamber.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Toys (AREA)
US733900A 1957-05-13 1958-05-08 Encased projectile Expired - Lifetime US2940391A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH828519X 1957-05-13

Publications (1)

Publication Number Publication Date
US2940391A true US2940391A (en) 1960-06-14

Family

ID=4540125

Family Applications (1)

Application Number Title Priority Date Filing Date
US733900A Expired - Lifetime US2940391A (en) 1957-05-13 1958-05-08 Encased projectile

Country Status (8)

Country Link
US (1) US2940391A (nl)
BE (1) BE566937A (nl)
CH (1) CH338731A (nl)
DE (1) DE1106210B (nl)
FR (1) FR1194950A (nl)
GB (1) GB828519A (nl)
LU (1) LU36024A1 (nl)
NL (2) NL227703A (nl)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3216356A (en) * 1964-01-30 1965-11-09 Jr William F Kaufmann Projectile
US3362328A (en) * 1966-01-24 1968-01-09 Army Usa Wear reduction additives
US3722413A (en) * 1970-09-11 1973-03-27 B Narvesen Arrangement in rockets
US4023496A (en) * 1972-08-09 1977-05-17 The United States Of America As Represented By The Secretary Of The Army Ejector motor braking system
US4334657A (en) * 1977-02-09 1982-06-15 Aktiebolaget Bofors Device for fin-stabilized shell or the like
US20090308274A1 (en) * 2008-06-11 2009-12-17 Lockheed Martin Corporation Integrated Pusher Plate for a Canister- or Gun-Launched Projectile and System Incorporating Same

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2220467B (en) * 1988-07-07 1992-01-08 John Christopher Thompson Re-usable ammunition cartridge

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB484346A (en) * 1936-04-03 1938-05-04 Sageb Sa Improvements in or relating to cartridges for firearms
US2338137A (en) * 1942-08-04 1944-01-04 Gerald H Shea Mortar flare shell
FR1064253A (fr) * 1951-11-07 1954-05-12 Fu R Die Entwicklung Von Erfin Projectile empenné

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE373811A (nl) * 1929-11-09
BE338084A (nl) * 1930-06-20

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB484346A (en) * 1936-04-03 1938-05-04 Sageb Sa Improvements in or relating to cartridges for firearms
US2338137A (en) * 1942-08-04 1944-01-04 Gerald H Shea Mortar flare shell
FR1064253A (fr) * 1951-11-07 1954-05-12 Fu R Die Entwicklung Von Erfin Projectile empenné

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3216356A (en) * 1964-01-30 1965-11-09 Jr William F Kaufmann Projectile
US3362328A (en) * 1966-01-24 1968-01-09 Army Usa Wear reduction additives
US3722413A (en) * 1970-09-11 1973-03-27 B Narvesen Arrangement in rockets
US4023496A (en) * 1972-08-09 1977-05-17 The United States Of America As Represented By The Secretary Of The Army Ejector motor braking system
US4334657A (en) * 1977-02-09 1982-06-15 Aktiebolaget Bofors Device for fin-stabilized shell or the like
US20090308274A1 (en) * 2008-06-11 2009-12-17 Lockheed Martin Corporation Integrated Pusher Plate for a Canister- or Gun-Launched Projectile and System Incorporating Same

Also Published As

Publication number Publication date
NL98587C (nl)
FR1194950A (fr) 1959-11-13
LU36024A1 (nl)
GB828519A (en) 1960-02-17
BE566937A (nl)
DE1106210B (de) 1961-05-04
NL227703A (nl)
CH338731A (fr) 1959-05-31

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