US3136052A - Process for the closure of hollow bodies - Google Patents

Process for the closure of hollow bodies Download PDF

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Publication number
US3136052A
US3136052A US814714A US81471459A US3136052A US 3136052 A US3136052 A US 3136052A US 814714 A US814714 A US 814714A US 81471459 A US81471459 A US 81471459A US 3136052 A US3136052 A US 3136052A
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US
United States
Prior art keywords
folds
external
another
closure
case
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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
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US814714A
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English (en)
Inventor
Pickart Auguste Jean- Ghislain
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.)
FN Herstal SA
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FN Herstal SA
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Publication date
Application filed by FN Herstal SA filed Critical FN Herstal SA
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Publication of US3136052A publication Critical patent/US3136052A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B33/00—Manufacture of ammunition; Dismantling of ammunition; Apparatus therefor
    • F42B33/12—Crimping shotgun cartridges
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B8/00—Practice or training ammunition
    • F42B8/02—Cartridges
    • F42B8/04—Blank cartridges, i.e. primed cartridges without projectile but containing an explosive or combustible powder charge

Definitions

  • the foldingdown is effected until the inner folds project below the plane of the closure, i.e. are inscribed within an extremely obtuse cone towards the interior of the case.
  • the folds form projecting ribs externally of the plane of closure, inscribed in a truncated cone towards the exterior of the case.
  • the cartridge should terminate in a portion the shape of which is as similar as possible to that of the real projectile and which guides the cartridge over the path from the magazine to the barrel chamber and its centre of gravity should be conveniently situated in such manner that at the moment of ejection it carries out the same movements as those of the case of a real cartridge.
  • the present invention relates to a process for the closure of hollow cylindrical bodies of slight thickness and consists in forming on the end of the body a small number of folds, in rounding the ridges of the external folds whilst simultaneously bending them down towards the longitudinal axis, and in simultaneously elongating them transversely so as to constitute an ogive (conical point).
  • a feature of the invention there are initially produced, in a first phase, internal folds which are brought into contact and which have substantially the shape of arcs of a circle; the second phase consists in flattening the ridges of the external folds whilst folding them down towards the axis and elongating them transversely by means of a concave ogival matrix exerting a longitudinal thrust towards the body, so that each initial external fold yields two lateral folds.
  • An especially advantageous embodiment consists of practice ammunition wherein the case is prolonged by an inseparable terminal portion corresponding to the projectile and having its free end closed by the present process; the said cylindrical terminal portion is directly manufactured with the body of the case and is fitted thereon and secured thereto by welding during the manufacturing process.
  • FIGURE 1 is a view, partially in perspective and drawn to a large scale, of the end of a practice cartridge to be closed, shown after the first phase of operation;
  • FIGURE 2 is a lateral view, drawn to a large scale and in elevation, of the final ogive obtained, and FIG- URE 3 is a sectional view taken along the line IIIIII of FIGURE 2;
  • FIGURE 4 is a diagrammatic view, drawn to a still larger scale, and showing in plan the end of the ogive and the deformation of the folds for forming the ogive;
  • FIGURE 5 is an elevational view of a completed practice cartridge.
  • the body 1 of the case is prolonged by a tubular and cylindrical terminal portion 2, the said portion 2 comes, together with the body 1, directly from the factory in the case of small-bore ammunition. If the ammunition is of large size, the body of the case and the terminal tubular portion may be manufactured separately, the said terminal tubular portion then being made integral with the case by Welding.
  • a matrix the interior of which is provided with three pins arranged at under the pressure exerted by the matrix, the end is deformed and is formed with three inner folds 3, arranged at 120 relatively to one another, and with three outer folds 4 arranged also at 120, as apparent from FIGURES 1 and 4.
  • the inner folds 3 have the form of arcs of a circle brought into contact with each other.
  • the end thus folded is covered with a matrix of ogival shape, exerting an axial thrust towards the body of the case.
  • the inner folds 3 substantially retain their shape; at the beginning of this phase, the initial external folds 4 are flattened so as to adopt the position 4' shown in broken lines, whilst being turned down towards the axis 5, as shown in FIGURE 4.
  • the initial folds 4 are then crushed (flattened) and laterally extended so as to form the final lateral folds such as those shown at 4a and the lips 4b and 4c of which are pressed together; at the point 6 of the ogive, the outer lips 4b constitute a more or less complete circular surface (FIGURE 4) since the lateral folds 4a are in contact with each other at that point. The further away from the point 6, the greater will be the spacing between the folds 4a, as apparent from FIGURES 2 and 3.
  • the completed ammunition will have the appearance shown in FIGURE 5.
  • the terminalportion representing the dummy projectile is no longer separated from the case; it is not projected and cannot result in accident during point-blank firing; furthermore, the shape and mechanical characteristics of the cartridge resemble those of a real cartridge as closely as possible.
  • said crushing androunding of the external folds being" varied lengthwise. of the body to cause the arcuate segments to contact oneanother at the end of the body and to be spaced from'one another in. increasing mannerin a direction away from the end of the body'to form a closedogival end on said body.
  • a method for closing the end'of a hollow cylin drical body comprising indenting the body radially inwardly at the end thereof at angularly spaced locations to form arcuate internal folds alternating with external" folds along the periphery of the body, the body being adjacent internal folds includean angle therebetween of 7 R eferenc eslCitedin the file of this patent UNITED. STATES PATENTS Salisbury June 127,- 1386

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Toys (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
US814714A 1958-06-04 1959-05-21 Process for the closure of hollow bodies Expired - Lifetime US3136052A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE568340 1958-06-04

Publications (1)

Publication Number Publication Date
US3136052A true US3136052A (en) 1964-06-09

Family

ID=3845036

Family Applications (1)

Application Number Title Priority Date Filing Date
US814714A Expired - Lifetime US3136052A (en) 1958-06-04 1959-05-21 Process for the closure of hollow bodies

Country Status (6)

Country Link
US (1) US3136052A (zh)
BE (1) BE568340A (zh)
ES (1) ES250046A1 (zh)
FR (1) FR1223086A (zh)
GB (1) GB897673A (zh)
NL (2) NL239701A (zh)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3311962A (en) * 1963-04-01 1967-04-04 Olin Mathieson Method of making an expanding point bullet
US3344464A (en) * 1964-03-31 1967-10-03 Olin Mathieson Pencil ferrule
US3452576A (en) * 1966-11-21 1969-07-01 Kelvinator Inc Method of and device for fabricating y-fittings
US3731517A (en) * 1968-12-30 1973-05-08 Patent And Devel Of North Caro Method of fabricating a fluid dispersion nozzle
US4131007A (en) * 1976-05-05 1978-12-26 Tenneco, Inc. Coupling device for connecting a plurality of ports to one pipe-method of making same
US4625537A (en) * 1982-12-06 1986-12-02 Grumman Aerospace Corporation Localized boss thickening by cold swaging
US4867065A (en) * 1987-09-19 1989-09-19 Rheinmetal Gmbh Training cartridge
FR2710142A1 (fr) * 1993-09-13 1995-03-24 Rheinmetall Gmbh Procédé d'obturation du corps de douille avant d'une cartouche de manÓoeuvre.
US20040016357A1 (en) * 2002-03-20 2004-01-29 Beal Harold F. Ammunition projectile having enhanced aerodynamic profile
US20050051259A1 (en) * 2003-09-09 2005-03-10 Chin-Kuang Luo Method for sealing heat pipes
US20080136154A1 (en) * 2005-02-15 2008-06-12 Autoliv Development Ab Airbag Inflator Gas Outlet and a Method of Manufacturing an Airbag Inflator
US20140034676A1 (en) * 2011-03-09 2014-02-06 Bravilor Holding B.V. Beverage preparation device with a deformable outlet passage
US20160084621A1 (en) * 2014-09-19 2016-03-24 ARC Technology, LLC Haptic feedback device for simulator
US9879958B2 (en) 2014-09-19 2018-01-30 ARC Technology, LLC Haptic feedback spark device for simulator
US20190376771A1 (en) * 2011-01-14 2019-12-12 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

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2674324A1 (fr) * 1991-04-02 1992-09-25 Eguizabal Echevarria Julian Projectile pour la simulation de tir au laser.
DE9304828U1 (de) * 1993-03-30 1993-06-09 Metallwerk Elisenhütte GmbH, 5408 Nassau Patrone für Manöverzwecke

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US260326A (en) * 1882-06-27 salisbury
US726579A (en) * 1902-09-22 1903-04-28 Otto Schuette Blank cartridge.
US934174A (en) * 1908-11-20 1909-09-14 Leslie E Hooker Method of making closed-end tubes.
US965745A (en) * 1909-11-16 1910-07-26 Lee B Purcell Blank cartridge.
US1924734A (en) * 1931-03-11 1933-08-29 Aluminum Co Of America Method of making tubular materials
US1994725A (en) * 1933-04-28 1935-03-19 Nat Tube Co Apparatus for reducing the diameter of the ends of pipes and tubes
US2055771A (en) * 1933-04-18 1936-09-29 Aluminum Co Of America Method of making shafts
US2130699A (en) * 1936-07-02 1938-09-20 Hans Amfaldern Method for the production of lightmetal flasks with thickened neck parts
US2357110A (en) * 1941-09-15 1944-08-29 Smith Corp A O Method of making bombshells
US2421629A (en) * 1943-02-10 1947-06-03 Otto A Langos Method for closing the ends of metal tubes
US2936709A (en) * 1952-12-16 1960-05-17 Olin Mathieson Ammunition

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US260326A (en) * 1882-06-27 salisbury
US726579A (en) * 1902-09-22 1903-04-28 Otto Schuette Blank cartridge.
US934174A (en) * 1908-11-20 1909-09-14 Leslie E Hooker Method of making closed-end tubes.
US965745A (en) * 1909-11-16 1910-07-26 Lee B Purcell Blank cartridge.
US1924734A (en) * 1931-03-11 1933-08-29 Aluminum Co Of America Method of making tubular materials
US2055771A (en) * 1933-04-18 1936-09-29 Aluminum Co Of America Method of making shafts
US1994725A (en) * 1933-04-28 1935-03-19 Nat Tube Co Apparatus for reducing the diameter of the ends of pipes and tubes
US2130699A (en) * 1936-07-02 1938-09-20 Hans Amfaldern Method for the production of lightmetal flasks with thickened neck parts
US2357110A (en) * 1941-09-15 1944-08-29 Smith Corp A O Method of making bombshells
US2421629A (en) * 1943-02-10 1947-06-03 Otto A Langos Method for closing the ends of metal tubes
US2936709A (en) * 1952-12-16 1960-05-17 Olin Mathieson Ammunition

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3311962A (en) * 1963-04-01 1967-04-04 Olin Mathieson Method of making an expanding point bullet
US3344464A (en) * 1964-03-31 1967-10-03 Olin Mathieson Pencil ferrule
US3452576A (en) * 1966-11-21 1969-07-01 Kelvinator Inc Method of and device for fabricating y-fittings
US3731517A (en) * 1968-12-30 1973-05-08 Patent And Devel Of North Caro Method of fabricating a fluid dispersion nozzle
US4131007A (en) * 1976-05-05 1978-12-26 Tenneco, Inc. Coupling device for connecting a plurality of ports to one pipe-method of making same
US4625537A (en) * 1982-12-06 1986-12-02 Grumman Aerospace Corporation Localized boss thickening by cold swaging
US4867065A (en) * 1987-09-19 1989-09-19 Rheinmetal Gmbh Training cartridge
FR2710142A1 (fr) * 1993-09-13 1995-03-24 Rheinmetall Gmbh Procédé d'obturation du corps de douille avant d'une cartouche de manÓoeuvre.
US5459914A (en) * 1993-09-13 1995-10-24 Rheinmetall Gmbh Method of sealing the front of a cylindrical sleeve body of a practice cartridge
US20040016357A1 (en) * 2002-03-20 2004-01-29 Beal Harold F. Ammunition projectile having enhanced aerodynamic profile
US7036433B2 (en) * 2002-03-20 2006-05-02 Beal Harold F Ammunition projectile having enhanced aerodynamic profile
US20050051259A1 (en) * 2003-09-09 2005-03-10 Chin-Kuang Luo Method for sealing heat pipes
US20080136154A1 (en) * 2005-02-15 2008-06-12 Autoliv Development Ab Airbag Inflator Gas Outlet and a Method of Manufacturing an Airbag Inflator
US20190376771A1 (en) * 2011-01-14 2019-12-12 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
US11353299B2 (en) * 2011-01-14 2022-06-07 Pcp Tactical, Llc Polymer-based cartridge casing for subsonic ammunition
US20230115741A1 (en) * 2011-01-14 2023-04-13 Pcp Tactical, Llc Polymer-based cartridge casing for subsonic ammunition
US11976911B2 (en) * 2011-01-14 2024-05-07 Pcp Tactical, Llc Polymer-based cartridge casing for subsonic ammunition
US20140034676A1 (en) * 2011-03-09 2014-02-06 Bravilor Holding B.V. Beverage preparation device with a deformable outlet passage
US9125520B2 (en) * 2011-03-09 2015-09-08 Bravilor Holding B.V. Beverage preparation device with a deformable outlet passage
US20160084621A1 (en) * 2014-09-19 2016-03-24 ARC Technology, LLC Haptic feedback device for simulator
US9719759B2 (en) * 2014-09-19 2017-08-01 ARC Technology, LLC Haptic feedback device for simulator
US9879958B2 (en) 2014-09-19 2018-01-30 ARC Technology, LLC Haptic feedback spark device for simulator
US10066913B2 (en) 2014-09-19 2018-09-04 ARC Technology, LLC Haptic feedback spark devices for simulator
US11448491B2 (en) 2018-07-30 2022-09-20 Pcp Tactical, Llc Polymer cartridge with enhanced snapfit metal insert and thickness ratios

Also Published As

Publication number Publication date
GB897673A (en) 1962-05-30
ES250046A1 (es) 1959-12-01
BE568340A (zh)
NL239701A (zh)
FR1223086A (fr) 1960-06-15
NL106032C (zh)

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