US3377953A - Detonator - Google Patents

Detonator Download PDF

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Publication number
US3377953A
US3377953A US564871A US56487166A US3377953A US 3377953 A US3377953 A US 3377953A US 564871 A US564871 A US 564871A US 56487166 A US56487166 A US 56487166A US 3377953 A US3377953 A US 3377953A
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United States
Prior art keywords
detonation
explosive
detonator
acting
charge
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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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US564871A
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English (en)
Inventor
Thomanek Franz Rudolf
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Individual
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Individual
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Publication of US3377953A publication Critical patent/US3377953A/en
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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
    • C—CHEMISTRY; METALLURGY
    • C06—EXPLOSIVES; MATCHES
    • C06C—DETONATING OR PRIMING DEVICES; FUSES; CHEMICAL LIGHTERS; PYROPHORIC COMPOSITIONS
    • C06C7/00—Non-electric detonators; Blasting caps; Primers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B3/00—Blasting cartridges, i.e. case and explosive
    • F42B3/10—Initiators therefor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S102/00—Ammunition and explosives
    • Y10S102/701—Charge wave forming

Definitions

  • This invention relates, in general, to the construction (if an explosive charge and, in particular, to a new and useful explosive charge or detonator having punctiform initiation of the detonation of a high intensity charge for obtaining 'an axially symmetrical detonation and wherein the explosive charge includes a fast acting explosive embedded in a slower acting explosive.
  • the symmetry of the detonation start will improve because the initiation intensity has increased.
  • the starting point of the detonation wave will then be equally probable over the entire cross section of the surface contact of the detonator rod. Therefore, because the starting point remains uncertain, it would be impossible to achieve a symmetrical detonation wave.
  • a detonator having punctiform initiation of the detonation of high intensity which includes an explosive charge of a faster detonation velocity explosive imbedded in a charge of a slower acting explosive.
  • Such a construction assures an exact punctiform initiation of the detonation with such a high initiation intensity, that a uniform propagation of the detonation in all directions will occur. This is effected by a detonator which consists of the two explosives of difierent detonation velocity.
  • a further object of the invention is to provide a detonator having exact punctiform initiation of the detonation with such a high initiation intensity that a uniform propagation of the detonation in all directions will be insured.
  • a further object of the invention is to provide a deton'ator which is simple in design, rugged in construction and economical to manufacture.
  • FIG. 1 is a schematic sectional representation of a detonator constructed in accordance with the invention
  • FIG. 2 is a view similar to FIG. 1 of another embodiment of the invention.
  • FIG. 3 is a view similar to FIG. 1 of still another embodirnent of the invention.
  • the invention embodied therein comprises a detonator which includes a slower explosive 1 of a relatively large size in which is embedded a conical tip 2' of a faster acting explosive 2.
  • the construction in accordance with the invention, is such that a non-symmetrical detonation is not probable. If an eccentric detonation wave is started, for example, at the tip of the arrow 3, the wave which is propagated designated 4 will strike after a short period of time the tip 2 of the explosive 2. Since the conical tip -2 of the faster-acting explosive 2 is surrofi'nded on all sides by the slower acting explosive 1, the release of the detonation wave in the cone apex takes place with full intensity.
  • the detonation wave shows then at a later point a course or wave path indicated 5.
  • an axially symmetrical eccentric detonation wave is released in the cone apex.
  • the following explosive charge proper is therefore initiated 'axially symmetrically by the symmetrically oriented detonation wave front portion 5a.
  • FIG. 2 another embodiment is indicated in which a slower explosive 7 surrounds a cone apex 8' of a faster acting explosive 8.
  • An additional cone of a faster-acting explosive 9 is arranged above the cone 8 in an apex man ner.
  • the following explosives are used: For the detonator part 7, tetryl pressed with about 2% wax and graphite; for the detonator part 8, for example, a cast explosive of from about 15% TNT and hexogen with a grain size of less than m.
  • the part 9 may advantageously comprise a highly pressed nitropenta with 2% Wax.
  • the detonator according to FIG. 2 operates so that each detonation wave in part 9, no matter where it is released on the surface, is always conducted first to the cone apex of the part 9 and thus also to the apex of the part 8.
  • the detonation waves in part 7 can thus have no harmful effect in any case on the axial symmetrical design of the detonation wave in part -8.
  • initiation of the detonation in a conical explosive charge of a faster explosive is conducted to the apex of the latter where an annular body 11 of a faster explosive is assembled with intermediate bodies 12 and 13.
  • the intermediate bodies 12 and 13 are made of a slower acting explosive.
  • the individual charges in FIGS. 1 and 2 are joined together, preferably with an adhesive such as a plastic adhesive.
  • a detonator having punctiform initiation of the detonation of high intensity for obtaining an axially symmetrical detonation comprising a slow acting explosive charge, and a fast-acting explosive charge having a conical tip imbedded within the slow acting charge, and means for initiating detonation at a point on said slow acting explosive charge at a location close to the axis of said fast acting explosive charge.
  • a detonator according to claim 1, wherein there are at least two slow acting explosive charges, one each surrounding the respective conical tip portion of each fast-acting explosive charge.
  • a detonator according to claim 1, including adhesive means bonding said explosive charges together.
  • a detonator according to claim 1, wherein said fastacting explosive is a cast explosive of around 15% TNT and 85% hexogen.
  • a detonator having punctiform initiation of a detonation of high intensity, for obtaining an axially symmetrical detonation comprising a slow acting explosive charge, and a fast-acting explosive charge imbedded within the slow acting charge, said fast-acting explosive charge including a conical tip imbedded in said slow acting charge, and a second fast-acting explosive having a conical tip portion arranged with its apex abutting the apex of said first fast-acting explosive charge, said slow acting explosive charge surrounding the conical tip of said fastacting and said second fast-acting explosive charges.
  • a detonator having punctiform initiation of the detonation of high intensity for obtaining an axially symmetrical detonation, at least two fast-acting explosive charges each having conical tip portions and being arranged with their apexes abutting, and a plurality of slow acting explosive charges surrounding the conical tip portions of said fast-acting explosive charges.
  • a detonator according to claim 6, wherein one of said fast-acting explosives is a cast explosive of around 15 TNT and hexogen and the other is pressed with a nitropenta and 2% wax, and the slow acting explosive is pressed tetryl and 2% wax and graphite.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
  • Air Bags (AREA)
US564871A 1965-08-12 1966-07-13 Detonator Expired - Lifetime US3377953A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB83239A DE1241734B (de) 1965-08-12 1965-08-12 Zuendsystem zum punktfoermigen Initiieren von Sprengkoerpern und zur Erzeugung von nachfolgend sich dadurch rotations-symmetrisch im Sprengkoerper ausbreitenden Detonationswellen

Publications (1)

Publication Number Publication Date
US3377953A true US3377953A (en) 1968-04-16

Family

ID=6981857

Family Applications (1)

Application Number Title Priority Date Filing Date
US564871A Expired - Lifetime US3377953A (en) 1965-08-12 1966-07-13 Detonator

Country Status (5)

Country Link
US (1) US3377953A (en, 2012)
CH (1) CH444001A (en, 2012)
DE (1) DE1241734B (en, 2012)
GB (1) GB1157304A (en, 2012)
SE (1) SE336097B (en, 2012)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3491688A (en) * 1968-05-01 1970-01-27 Intermountain Res & Eng Booster and method of use

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1796082B1 (de) * 1968-08-28 1971-12-09 Wasagchemie Ag Zuender fuer die punktfoermige Initiierung von Sprengladungen
DE2807258C1 (de) * 1978-02-21 1983-05-05 Messerschmitt-Bölkow-Blohm GmbH, 8000 München Zuendsystem zum Initiieren von Sprengladungen
DE19643706C2 (de) * 1996-10-23 1998-08-27 Daimler Benz Aerospace Ag Vorrichtung zum punktförmigen Initiieren einer Ladung

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2396978A (en) * 1941-04-28 1946-03-19 Franklin R Amthor Shell
US2604042A (en) * 1947-10-06 1952-07-22 Ici Ltd Detonating explosive charge and method of impressing surfaces employing same
US3100445A (en) * 1959-01-14 1963-08-13 Borg Warner Shaped charge and method of firing the same
US3285012A (en) * 1963-03-05 1966-11-15 Onera (Off Nat Aerospatiale) Solid propellant rocket motors

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2396978A (en) * 1941-04-28 1946-03-19 Franklin R Amthor Shell
US2604042A (en) * 1947-10-06 1952-07-22 Ici Ltd Detonating explosive charge and method of impressing surfaces employing same
US3100445A (en) * 1959-01-14 1963-08-13 Borg Warner Shaped charge and method of firing the same
US3285012A (en) * 1963-03-05 1966-11-15 Onera (Off Nat Aerospatiale) Solid propellant rocket motors

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3491688A (en) * 1968-05-01 1970-01-27 Intermountain Res & Eng Booster and method of use

Also Published As

Publication number Publication date
SE336097B (en, 2012) 1971-06-21
GB1157304A (en) 1969-07-09
DE1241734B (de) 1967-06-01
CH444001A (de) 1967-09-15

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