US2591286A - Metal cartridge and method for producing same - Google Patents

Metal cartridge and method for producing same Download PDF

Info

Publication number
US2591286A
US2591286A US15716A US1571648A US2591286A US 2591286 A US2591286 A US 2591286A US 15716 A US15716 A US 15716A US 1571648 A US1571648 A US 1571648A US 2591286 A US2591286 A US 2591286A
Authority
US
United States
Prior art keywords
cartridge
case
crimping
plastic material
die
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
US15716A
Other languages
English (en)
Inventor
Paulve Marcel Luc Amedee
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of US2591286A publication Critical patent/US2591286A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B7/00—Shotgun ammunition
    • F42B7/02—Cartridges, i.e. cases with propellant charge and missile
    • F42B7/12—Cartridge top closures, i.e. for the missile side

Definitions

  • the present invention relates to improvements in metal cartridges and more particularly sporting cartridges crimped in star formation. These cartridges are closed by gathering in the free .lips of the open end of the case and permit of avoiding the use of a wad.
  • One object of this invention is to provide a complete watertightness of the cartridge without any change in its ballistic qualities.
  • the invention concerns a method of making a metallic cartridge in which before completion of the last crimping step which is performed by turning over the folds made in .the open end of the case, one inserts in'Lthe middle gap, a small cylindrical piece of some plastic material.
  • This small plastic cylinder or thread which is given a suitable diameter greater than that of the gap, is compressed to a high extent by the .end edging of the folds when these latter are bent well back towards the center and the plastic material finds its way between the interstitial spaces .leftbetween these folds and .thus provides a thorough watertight closure of 'the cartridge.
  • the insertion of the plastic material may be carried out in any suitable way and for instance by injecting itin a pasty condition or by inserting the end of 'a' thread of this plastic material into the aforesaid central gap.
  • the plastic material employed for this closure may consist of natural or synthetic rubber and, generally speaking, may consist of any standard material classified as a plastic showing at the time of fits'ins'ertion in the gap sufiicient plastic quality 'to make the cartridge completely impervous to moisture.
  • the plastic "material introduced in the gap does not prove a hindrance at all to the opening of the cartridge when-itis fired.
  • the size of this'plastic material is substantially that'of a grain of shot and does not cause any interference in the cone of fire of the shot.
  • An object of :the present invention is to avoid any serious inconveniences of this kind and with this aim in view one of its important pointsis the fact that the star-shaped methodof crimping is carried out so that the crimped'end of the cartridge is concave andlinks up with the cylindrical body of the case through a semi-circus lar profile with a comp.aratively large radius, for instance, over twice thethickness of the wall of the case.
  • This special feature offers the further advantage that when the folds are bent back over the plastic material closing the central small gap, the flexibility of this plastic cannot'cause any partial upsetting of the crimping as might happen if the folding back formed a horizontal plane crime]. a bulged shape.
  • the cylindrical portion of the case shows one or more concave parts formed for instance, by one or more grooves, the bottom of which carries information or markings indicating the explosive charge, the number of the shot and so on. These markings may be either stamped on, or formed by a distinguishing color painted on the bottom of this or these concave portions of the case.
  • the present invention also contemplates as a new article of manufacture, metal cartridges with star-shaped crimping improved in accordance with this invention and characterized by the following features:
  • the crimped end is concave and connected to the cylindrical wall of the case by a semicircular surface of comparatively large radius.
  • the cylindrical wall of the case contains one or more concave portions such as grooves, thev bottom of which carries the required markings indicating the explosive charge and the number of the shot used in the cartridge.
  • the invention also includes the die employed for '-the last crimping operative step of the cartridge during which the plastic material is inserted in the central gap of the crimped end of the cartridge, and the folds formed at the end of the case are bent back over this plastic materia1 so as to compress it and ensure the watertightness. This folding back of the folds being continued towards the center of the. cartridge until the crimped end of the case assumes a concave shape connected to the cylindrical body bya toreshaped surface of comparatively large radius.
  • the die employed for this last operation is formed by a recessed socket of an inner diameter corresponding to the outer diameter of the cartridge to be crimped' and of which the bottom is convex and made up of a cone connected to the. wall of the socket constituting the die by a tore-shaped surface of comparatively large radius, the die being provided along its axis with a drilled hole through which is inserted the plastic material constituting the closure of the cartridge.
  • Figure l is an axial section of an improved cartridge case according to the invention before the crimping operation.
  • Figure 2 is a diagrammatic view partly in section and partly in elevation showing the last crimping operation and the closure of the cartridge.
  • Figure 3 is an elevation given partly in section of the crimped cartridge.
  • Figure 4 is a plan view showing the top of Figure 3.
  • the case I of the improved metal cartridge according to the invention has annular grooves or flutings 2 obtained by any suitable means and methods, and for instance by working the metal inwards during the manufacture of the case.
  • the folds 3 of the end of case I. are bent back towards the center by means of a die 4 formed according to the invention by a recessed socket the bottom f which is convex and forms, for instance, a cone the apex angle of which is suitably selected with respect to the degree of concavity that is wanted on the crimped end of the cartridge I.
  • the cone 5 is connected to the inner wall of the socket forming the die 4 by a tore-shaped surface 6 of comparatively large radius 1'.
  • An axial bore along the axis 1 is provided in the die 4 and permits the introduction of the plastic material 8 employed for closing the cartridge.
  • the cross-sectional area of the hole I of the die 4 and consequently that of the plastic thread 8 are selected so as to be greater than the area of the opening of the cartridge after the folds 3 are bent back.
  • This plastic material 8 thus gets into the interstitial spaces of the folds 3 and forms a plug closing the cartridge I in a perfectly watertight manner.
  • the end of the cartridge has however the faculty of opening out freely when the cartridge is fired. This piece of plastic does not interfere in any way with the cone of fire of the shots since it is about the same size as a grain of shot. (See Figure 3.)
  • the plastic material 3 is of any suitable character and may be formed either by a thermoplastic material or natural or synthetic rubber introduced preferably in a pasty condition, or in the form 'of a thread through the axial hole 1 of the die.
  • the amount of plastic inserted into the cartridge is selected suitably and any convenient means may be utilised for cutting up the thread 8.
  • the inside of the groove of fluting 2 bears an impression of paint or varnish ID of Whichthe colour ed to agree with a suitable codeand al- 4 he huntsman to appreciate at one glance the -hind of charge, number of the shot, or any other-loading particulars.
  • These impressions of colours of the carriage may be put on either before or after the crimping of the cartridge and it will be noticed from their position at, the bottom fgf the groove 2, that they will notbe erased by cartridges rubbing against each Rother or against the wall of the cartridge-pouches in which they are carried.
  • step 3 consisting in rendering concave the outer surface of the crimped end of the case and connecting said concave part with theffelaining portion of the case by a tore-shaped surface having a radius the length of which is greater than twice the thickness of the walls of said case.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Closures For Containers (AREA)
  • Tubes (AREA)
US15716A 1947-04-25 1948-03-18 Metal cartridge and method for producing same Expired - Lifetime US2591286A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR834214X 1947-04-25

Publications (1)

Publication Number Publication Date
US2591286A true US2591286A (en) 1952-04-01

Family

ID=9296981

Family Applications (1)

Application Number Title Priority Date Filing Date
US15716A Expired - Lifetime US2591286A (en) 1947-04-25 1948-03-18 Metal cartridge and method for producing same

Country Status (5)

Country Link
US (1) US2591286A (enrdf_load_stackoverflow)
BE (1) BE480870A (enrdf_load_stackoverflow)
DE (1) DE834214C (enrdf_load_stackoverflow)
FR (1) FR967037A (enrdf_load_stackoverflow)
GB (1) GB648923A (enrdf_load_stackoverflow)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2682222A (en) * 1951-01-26 1954-06-29 Canadian Ind Shot shell sealing
US2930275A (en) * 1955-11-15 1960-03-29 American Cyanamid Co Method of sealing spirally wound dynamite containers
US3261291A (en) * 1964-03-30 1966-07-19 Olin Mathieson Cartridge
US3628225A (en) * 1968-07-19 1971-12-21 Robert W Parker Method of making a military blank cartridge
US4742775A (en) * 1985-05-06 1988-05-10 Harris Paul C Power load for underwater spear gun
US4815389A (en) * 1987-07-31 1989-03-28 Remington Arms Company Shot cartridge
WO1991006824A1 (en) * 1989-11-03 1991-05-16 Olin Corporation Moisture seal for shotshells

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB816544A (en) * 1956-10-05 1959-07-15 Olin Mathieson Thermoplastic shotgun cartridges and method of closure therefor
NL259243A (enrdf_load_stackoverflow) * 1960-04-15
DE4331066C2 (de) * 1993-09-13 1998-01-22 Rheinmetall Ind Ag Verfahren zum Verschließen des vorderen Hülsenkörpers einer Manöverpatrone

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US50536A (en) * 1865-10-17 Improvement in metallic cartridges
GB190516922A (en) * 1905-08-21 1905-11-16 Cedric Chivers Improvements in Bindings for Books.
US1125644A (en) * 1915-01-19 H S Brewington Paper container.
GB202252A (en) * 1922-09-13 1923-08-16 Fr Des Munitions De Chasse De Improvement in cartridges
CH106575A (fr) * 1923-08-20 1924-09-16 Hardouin Camille Cartouche de chasse.
GB277762A (en) * 1926-06-26 1927-09-26 Daniel John Stapleton Improvements in and relating to blank ammunition for use in gas-operated machine guns
GB544814A (en) * 1940-09-25 1942-04-29 Du Pont Improvements in or relating to end closures for explosive cartridges
US2336065A (en) * 1940-03-29 1943-12-07 Canadian Ind Ammunition

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US50536A (en) * 1865-10-17 Improvement in metallic cartridges
US1125644A (en) * 1915-01-19 H S Brewington Paper container.
GB190516922A (en) * 1905-08-21 1905-11-16 Cedric Chivers Improvements in Bindings for Books.
GB202252A (en) * 1922-09-13 1923-08-16 Fr Des Munitions De Chasse De Improvement in cartridges
CH106575A (fr) * 1923-08-20 1924-09-16 Hardouin Camille Cartouche de chasse.
GB277762A (en) * 1926-06-26 1927-09-26 Daniel John Stapleton Improvements in and relating to blank ammunition for use in gas-operated machine guns
US2336065A (en) * 1940-03-29 1943-12-07 Canadian Ind Ammunition
GB544814A (en) * 1940-09-25 1942-04-29 Du Pont Improvements in or relating to end closures for explosive cartridges

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2682222A (en) * 1951-01-26 1954-06-29 Canadian Ind Shot shell sealing
US2930275A (en) * 1955-11-15 1960-03-29 American Cyanamid Co Method of sealing spirally wound dynamite containers
US3261291A (en) * 1964-03-30 1966-07-19 Olin Mathieson Cartridge
US3628225A (en) * 1968-07-19 1971-12-21 Robert W Parker Method of making a military blank cartridge
US4742775A (en) * 1985-05-06 1988-05-10 Harris Paul C Power load for underwater spear gun
US4815389A (en) * 1987-07-31 1989-03-28 Remington Arms Company Shot cartridge
WO1991006824A1 (en) * 1989-11-03 1991-05-16 Olin Corporation Moisture seal for shotshells

Also Published As

Publication number Publication date
FR967037A (fr) 1950-10-24
BE480870A (enrdf_load_stackoverflow)
GB648923A (en) 1951-01-17
DE834214C (de) 1952-03-17

Similar Documents

Publication Publication Date Title
US2591286A (en) Metal cartridge and method for producing same
US2936709A (en) Ammunition
US2336065A (en) Ammunition
DE68921764T2 (de) Jagdpatrone mit verkleinertem bodenpfropfen und vergrössertem innenvolumen für die schrotladungen.
GB967462A (en) Improvements in or relating to a shot-gun cartridge end closure and method of forming same
US2466561A (en) Propellent cartridge for mortar shells
EP0187709A1 (en) Water containing explosive cartridge and preparation thereof
USRE23102E (en) Waterproof explosive cartridge
US3442214A (en) Shotgun cartridge
US2682222A (en) Shot shell sealing
US219491A (en) Improvement in cartridges
US2389086A (en) Electric detonator
US4176583A (en) Device for conditioning expended shotshells
US2722155A (en) Manufacture of electric blasting caps
DE2729683C3 (de) Nichtelektrischer Verzögerungssprengsatz
US2371874A (en) Explosive cartridge
US2178723A (en) Detonator
US3648615A (en) Fusee cap
US2352549A (en) End closure for explosive cartridges
US2373554A (en) Ammunition
US2326310A (en) End closure for explosive cartridges
US1883575A (en) Shot shell and method of loading the same
US2947254A (en) Closing plug for semi-fixed ammunition
US2915972A (en) Ammunition
DE69004063T2 (de) Feuerwerkskörper mit Drückbetätigung.