US3658007A - Hollow bursting charge - Google Patents

Hollow bursting charge Download PDF

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Publication number
US3658007A
US3658007A US804852A US3658007DA US3658007A US 3658007 A US3658007 A US 3658007A US 804852 A US804852 A US 804852A US 3658007D A US3658007D A US 3658007DA US 3658007 A US3658007 A US 3658007A
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US
United States
Prior art keywords
conical
explosive
ignition
main
charge
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
US804852A
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English (en)
Inventor
Ludwig Bucklisch
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.)
Dynamit Nobel AG
Original Assignee
Dynamit Nobel 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 Dynamit Nobel AG filed Critical Dynamit Nobel AG
Application granted granted Critical
Publication of US3658007A publication Critical patent/US3658007A/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
    • F42B1/00—Explosive charges characterised by form or shape but not dependent on shape of container
    • F42B1/02—Shaped or hollow charges
    • F42B1/024—Shaped or hollow charges provided with embedded bodies of inert material

Definitions

  • annular ignition zone for the main bursting charge
  • inert body consists of a substance having a relatively low sound velocity, for example, synthetic material, plaster of Paris, or the like, which will delay the direct ignition in the axial direction so that ignition will first of all take place radially of the main bursting charge after detouring the inert body.
  • This is accomplished, in accordance with the invention, by assembling all the explosives in one jacket together with an inert element and a conical insert and conically offsetting the jacket encompassing the hollow explosive charge on its interior toward the primer for reception of the conical shell, ignition transmitting explosive contacting the primer at preferably its flattened tip.
  • the inert body is provided as a double cone received within the inner conical surface of the ignition transmitting shell and a conical bore in the main bursting charge, respectively. In this manner, the inert body may be maintained in a centered position within the jacket, if necessary, during the assembly process with respect to the primer by means of a suitable device. All of the conical surfaces of the explosive elements have axes that are congruent.
  • a conical shell bottom section may be provided with a conical exterior surface received within the conical end of the jacket and a conical interior surface receiving therein the ignition transmitting shell.
  • the outside conical surface of the bottom piece will preferably have substantial play in the transverse direction with respect to the jacket but have a tight fit for its internal surface with respect to the ignition transmitting explosive shell.
  • FIG. 1 is an axial cross-sectional view taken through a hollow explosive charge according to the present invention.
  • FIG. 2 is an axial cross-sectional view taken through another embodiment of the present invention.
  • the hollow explosive charge has a slightly conical tubular jacket or casing 8 provided at one end with an inclined jacket bottom 2 having a conical interior surface and terminating in a rear portion receiving therein the primer 6.
  • the primer 6 is immediately adjacent to and ignites the conical shell ignition transmitting explosive l, which is slightly truncated at its tip adjacent primer 6.
  • the outer conical surface of the shell 1 is accurately complementary to the interior surface of the bottom 2 and has its interior conical surface accurately complementary to the exterior adjacent conical surface of the inert element or body 3, which is shaped as a double cone with or without truncated front or rear ends.
  • the inert body 3 may be constructed of metal, synthetic material, plaster of Paris, or the like, and the cone thereof directed to the front fits into a corresponding internal conical surface of the main explosive or bursting charge 4.
  • the ignition transmitting explosive 1 contacts the main explosive charge 4 along a surface that is an extension of the rearward conical surface of the inert body 3.
  • the jacket 8 may be made of metal and is provided with a conical insert 5 extending within the complementary-formed conical bore of the main explosive charge 4 on the end opposite the rear primer 6.
  • the detonation waves will thus be propagated from the primer 6 by way of the ignition transmitting element 1 to the main explosive charge 4, with the inert body being circumvented. Within the inert body 3, the waves will propagate so slowly that they arrive with a delay at the main explosive charge in order to continue the detonation in the axial direction.
  • the detonation waves thus impinge on the conical insert 5 with a steep angle.
  • the second embodiment of the present invention employs a jacket 8 having a slightly conical taper on its exterior to the primer 6. As in the embodiment described with respect to FIG.
  • the inert body 3 is shaped as a double cone and is enveloped, on the one hand, by the main explosive charge 4, and on the other hand, by the ignition transmitting explosive l, which is shell shaped.
  • the outer conical surface of the ignition transmitting explosive 1 does not directly contact the bottom 2 of the jacket 8, but instead extends at a larger angle with a space therebetween.
  • the space is filled by a bottom piece 7, which rests, on the one hand, on the internal surface of the jacket 8 and, on the other hand, complementarily engages the outer surface of the ignition transmitting explosive 1.
  • the ignition transmitting explosive l, the inert body 3 and the explosive charge 4 fit very accurately with respect to each other; the bottom piece 7 need not contact the jacket 2 in an accurately fitting manner; rather, this bottom piece 7 may be provided with transverse play with respect to the jacket 8 to compensate for assymmetries of the individual explosive and inert parts with respect to one another.
  • the manufacture of the identical conical shapes for interfitting conical surfaces may be suitably accomplished with tools, for example, pressing dies and drawing tools, of corresponding conical shape, which tools will be produced on the same machine tool with the same setting for the machining operations, so that any unevenness which might occur is compensated for during the assembly of the mating parts.
  • tools for example, pressing dies and drawing tools, of corresponding conical shape, which tools will be produced on the same machine tool with the same setting for the machining operations, so that any unevenness which might occur is compensated for during the assembly of the mating parts.
  • An axially symmetrical explosive device with annular ignition comprising: a rear primer, a main explosive charge having conically shaped front and rear recesses disposed in an axially symmetrical manner and pointed toward each other, the rear recess covering only a central portion of the rear of said main charge, the peripheral region of said main explosive charge surrounding said rear recess having a frusto-conical surface tapered in the rearward direction; a conical insert in the front recess of said main explosive charge; a jacket surrounding said main explosive charge and having a conically shaped interior surface pointing rearwardly to said primer; an ignition transmitting explosive within said conically shaped interior surface of said jacket and having the shape of a conical shell with its rear tip adjacent said primer and its front periphery complementary to and receivable on the remaining peripheral region of said main explosive charge; an inert body having oppositely pointed first and second conical exterior surfaces, said first surface being complementary to and received within the conical surface of said ignition transmitting explosive and the second surface complementary to and received within the
  • the explosive device according to claim 1 including a conical shell bottom piece mounted between and complementary to each of the conical shaped interior surface of said jacket with transverse play and the conical exterior surface of said ignition transmitting explosive without play.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
  • Portable Nailing Machines And Staplers (AREA)
US804852A 1968-03-08 1969-03-06 Hollow bursting charge Expired - Lifetime US3658007A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19681696660 DE1696660A1 (de) 1968-03-08 1968-03-08 Hohlsprengladung

Publications (1)

Publication Number Publication Date
US3658007A true US3658007A (en) 1972-04-25

Family

ID=5687958

Family Applications (1)

Application Number Title Priority Date Filing Date
US804852A Expired - Lifetime US3658007A (en) 1968-03-08 1969-03-06 Hollow bursting charge

Country Status (6)

Country Link
US (1) US3658007A (enrdf_load_stackoverflow)
BE (1) BE729489A (enrdf_load_stackoverflow)
DE (1) DE1696660A1 (enrdf_load_stackoverflow)
FR (1) FR1599650A (enrdf_load_stackoverflow)
GB (1) GB1251158A (enrdf_load_stackoverflow)
NL (1) NL6816873A (enrdf_load_stackoverflow)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4829901A (en) * 1987-12-28 1989-05-16 Baker Hughes Incorporated Shaped charge having multi-point initiation for well perforating guns and method
US5233929A (en) * 1992-05-14 1993-08-10 The United States Of America As Represented By The Secretary Of The Navy Booster explosive rings
US6393991B1 (en) 2000-06-13 2002-05-28 General Dynamics Ordnance And Tactical Systems, Inc. K-charge—a multipurpose shaped charge warhead
US20050115391A1 (en) * 2003-10-14 2005-06-02 Baker Ernest L. Method and apparatus to improve perforating effectiveness using a unique multiple point initiated shaped charge perforator
RU2453796C1 (ru) * 2011-01-12 2012-06-20 Николай Евгеньевич Староверов Кумулятивный заряд староверова-5 /варианты/
US20150020705A1 (en) * 2007-04-17 2015-01-22 Marc Hartmann Apparatus for releasing fluid to the atmosphere
US10048047B2 (en) * 2014-08-06 2018-08-14 Alba Manufacturing Corp. Explosive booster
US20210310773A1 (en) * 2018-07-31 2021-10-07 Orica International Pte Ltd Explosive Device Configured For Producing A Quasi-Planar Shock Wave
WO2025066297A1 (zh) * 2024-06-07 2025-04-03 中铁七局集团有限公司 露天矿山间隔装药爆破施工方法

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2816528C1 (de) * 1978-04-17 1991-01-03 Rheinmetall Gmbh Doppelhohlladung in koaxialer Tandemanordnung,insbesondere fuer panzerbrechende Projektile
FR2555303B1 (fr) * 1978-07-28 1987-01-16 France Etat Armement Nouvelle tete militaire explosive antichar
DE2852334A1 (de) * 1978-12-04 1980-06-26 Dynamit Nobel Ag Verfahren zur herstellung gepresster, insbesondere grosskalibriger sprengladungen
DE2852359C1 (de) * 1978-12-04 1991-02-21 Dynamit Nobel Ag Inerteinlage zur Detonationswellenlenkung in Hohlladungen
DE3216684C2 (de) * 1982-05-04 1986-01-09 Josef Dipl.-Math. 8899 Rettenbach Kiermeir Hohlladung

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB714747A (en) * 1951-09-12 1954-09-01 Luvo Ltd Improvements in projectiles containing an explosive in the form of a hollow charge
US2809585A (en) * 1949-11-16 1957-10-15 Sidney A Moses Projectile for shaped charges
US3027838A (en) * 1956-06-27 1962-04-03 Borg Warner Shaped charge
US3034393A (en) * 1959-06-01 1962-05-15 Aerojet General Co Method for producing a shaped charge
GB970395A (en) * 1960-04-05 1964-09-23 John Olof Bjorklund Improvements in armour piercing projectiles
US3451339A (en) * 1964-03-03 1969-06-24 Tech De Rech Ind Et Mechanique Priming explosive devices

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2809585A (en) * 1949-11-16 1957-10-15 Sidney A Moses Projectile for shaped charges
GB714747A (en) * 1951-09-12 1954-09-01 Luvo Ltd Improvements in projectiles containing an explosive in the form of a hollow charge
US3027838A (en) * 1956-06-27 1962-04-03 Borg Warner Shaped charge
US3034393A (en) * 1959-06-01 1962-05-15 Aerojet General Co Method for producing a shaped charge
GB970395A (en) * 1960-04-05 1964-09-23 John Olof Bjorklund Improvements in armour piercing projectiles
US3451339A (en) * 1964-03-03 1969-06-24 Tech De Rech Ind Et Mechanique Priming explosive devices

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4829901A (en) * 1987-12-28 1989-05-16 Baker Hughes Incorporated Shaped charge having multi-point initiation for well perforating guns and method
US5233929A (en) * 1992-05-14 1993-08-10 The United States Of America As Represented By The Secretary Of The Navy Booster explosive rings
US6393991B1 (en) 2000-06-13 2002-05-28 General Dynamics Ordnance And Tactical Systems, Inc. K-charge—a multipurpose shaped charge warhead
US20050115391A1 (en) * 2003-10-14 2005-06-02 Baker Ernest L. Method and apparatus to improve perforating effectiveness using a unique multiple point initiated shaped charge perforator
US6925924B2 (en) * 2003-10-14 2005-08-09 Molycorp Inc. Method and apparatus to improve perforating effectiveness using a unique multiple point initiated shaped charge perforator
US20050188878A1 (en) * 2003-10-14 2005-09-01 Baker Ernest L. Unique multiple point initiated shaped charge perforator and method for its use
US20150020705A1 (en) * 2007-04-17 2015-01-22 Marc Hartmann Apparatus for releasing fluid to the atmosphere
RU2453796C1 (ru) * 2011-01-12 2012-06-20 Николай Евгеньевич Староверов Кумулятивный заряд староверова-5 /варианты/
US10048047B2 (en) * 2014-08-06 2018-08-14 Alba Manufacturing Corp. Explosive booster
US20210310773A1 (en) * 2018-07-31 2021-10-07 Orica International Pte Ltd Explosive Device Configured For Producing A Quasi-Planar Shock Wave
US12104887B2 (en) * 2018-07-31 2024-10-01 Orica International Pte Ltd Explosive device configured for producing a quasi-planar shock wave
WO2025066297A1 (zh) * 2024-06-07 2025-04-03 中铁七局集团有限公司 露天矿山间隔装药爆破施工方法

Also Published As

Publication number Publication date
DE1696660A1 (de) 1971-11-18
NL6816873A (enrdf_load_stackoverflow) 1969-09-10
GB1251158A (enrdf_load_stackoverflow) 1971-10-27
BE729489A (enrdf_load_stackoverflow) 1969-08-18
FR1599650A (enrdf_load_stackoverflow) 1970-07-15

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