US3491687A - Explosive cartridge - Google Patents

Explosive cartridge Download PDF

Info

Publication number
US3491687A
US3491687A US635052A US63505267A US3491687A US 3491687 A US3491687 A US 3491687A US 635052 A US635052 A US 635052A US 63505267 A US63505267 A US 63505267A US 3491687 A US3491687 A US 3491687A
Authority
US
United States
Prior art keywords
cartridge
detonator
explosive
casing
tube
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
US635052A
Other languages
English (en)
Inventor
Jacques Cholet
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.)
IFP Energies Nouvelles IFPEN
Original Assignee
IFP Energies Nouvelles IFPEN
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 IFP Energies Nouvelles IFPEN filed Critical IFP Energies Nouvelles IFPEN
Application granted granted Critical
Publication of US3491687A publication Critical patent/US3491687A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B3/00—Audible signalling systems; Audible personal calling systems
    • G08B3/14—Audible signalling systems; Audible personal calling systems using explosives
    • 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

Definitions

  • An explosive cartridge for carrying out under-water explosions which comprises a cartridge body of destructible material comprising an inner tube surrounded by a cylindrical casing and defining an annular space therebetween, said casing being integral with said tube and having one end closing said annular space and terminating with a tubular extension of the inner tube, detonator means disposed in the inner tube at the terminating end portion of the casing, a first charge of low sensitivity explosive disposed in said annular space in the end portion of the casing and a second relay-charge of high sensitivity disposed in a predetermined relationship with respect to the detonator means.
  • This invention relates to a new type of explosive cartridge adapted for use in connenction with a sound wave emitting device of the type described in the French Patent 1,422,837.
  • FIGURE 1 is a schematic external view of the cartridge
  • FIGURE 2 represents a cross-sectional view of a first embodiment of cartridge according to this invention
  • FIGURE 3 represents a cross-sectional View of a second embodiment of cartridge
  • FIGURE 4 represents a cross-sectional view of a third embodiment of cartridge according to the invention.
  • the cartridge comprises a body made of insulating material, substantially rigid and destructible such as for instance plastic material, said body consisting essentially of an external casing 2 surrounding a concentric internal tube 1 integral therewith, the casing and the internal tube being for instance mouldedv as a sole piece.
  • the internal tube 1, cylindrical over its whole length is surrounded by the casing 2.
  • This casing has a cylindrical shape over the major part of its length and is provided, close to one end thereof designated by the term of cartridge nose, with a rounded part 3 closing the space between the casing and tube 1 at one end thereof and terminating with a tubular extension 4 of tube 1.
  • the casing 2 comprises at the end opposite to the tubular extension 4, an enlarged part forming the head of the cartridge and terminating with a flange 7.
  • the cartridge according to this invention also comprises a charge 8 of low sensitive explosive material, for instance a nitrate-containing explosive, in combination with a lower amount 9 of a very sensitive explosive, hereafter referred to as explosive relay or relay-charge, for instance pentrite.
  • This explosive relay may have an annular shape so as to surround the tube 1 while being placed in the interior of the main charge 8.
  • the system of exploding charges of different sensitivities is known per se.
  • the object of the invention is to provide cartridges of such a configuration as to make possible an association of charges of different sensitivities within a cartridge body in such a manner that said charges can be introduced very quickly and with the maximal security into the cartridge body at the place provided therefor.
  • the main charge of explosive material is placed at the bottom of the easing into the space between the tube 1 and the casing 2, and is maintained in said position by means of a watertight cork 10 made of destructible material (plastic material for instance).
  • An electric detonator 11 is placed at the time the cartridge is to be used, inside the tube 1 wherein it is maintained in the vicinity of the explosive charge by the narrowing 5 at one end, and at the other end by the locking member 12 integral with the tube 1, made of a deformable material so as to make possible the introduction of the detonator.
  • the electric wires of detonator 11 are protected respectively by tubes 1 and 4.
  • the internal diameter of the narrowing 5 slightly greater than that of the conductors of the detonator which extend, through said narrowing, by a denuded portion housed in the tubular part 4.
  • FIGURE 3 illustrates a second embodiment of a cartridge according to this invention, according to which the explosive relay is placed inside the tube 1 behind the detonator 11 to which it can be secured by a sleeve 13 made of destructible material. It is thus very simple, at the time where the cartridge is to be used, to introduce in tube 1 the assembly of elements 9, 11 and 13. There may also be placed, between the detonator 11 and the narrowing 5, an insulating ring 14 of supple material.
  • the inner tube 1 of the cartridge varies in diameter over its length.
  • the part 1a of this tube which is the nearer of the cartridge nose exhibits, over a length smaller than that of the detonator, an inside diameter equal, except for a slight clearance, to the diameter of the detonator.
  • the remaining part 1b of the inner tube has a larger diameter and forms, at its junction, with part 1a, an annular shoulder 15.
  • a first charge, of low-sensitive explosive material is introduced, in the same manner as in the preceding cases, into the annular space between tube 1 and casing 2, and is maintained in the bottom of said annular space by means of a watertight annular cork 10 made of destructible material (plastic material for example).
  • the second charge or relay-charge 9, consisting of very sensitive explosive material is given the shape of a ring whose internal diameter is adapted to the external diameter of the detonator and whose external diameter is adapted to the internal diameter of the enlarged tube part 112.
  • the relay-charge is engaged on one end of the detonator 11 and the assembly relay-detonator is slid into the tube 1 until it reaches the position where the relay-charge comes in abutment against the shoulder 15.
  • the relay-charge 9 is placed near a first end of detonator 11, preferably in the vicinity of the active part thereof, and at such a place that, when the relay is in abutment against the shoulder 15, the second end of the detonator is substantially at the bottom of the casing.
  • ca-rtridge configuration allows a greater rapidity in the preparation of the cartridge just before use, and a greater security of operation since the relay is only put in place at the last moment before use.
  • An explosive cartridge for carrying out underwater explosions which comprises an inner tube surrounded by a cylindrical casing and defining an annular space therebetween, said casing being integral with said inner tube and closing said annular space by terminating at one end of the cartridge, said cartridge being open at the other end and said inner tube extending beyond the terminating point of the casing and containing an internal narrowing of the inner tube at about said terminating point, detonator means maintained in a predetermined position in the cartridge with one end thereof in abutment against the internal narrowing of the tube between said tube and the tubular extension thereof at about the terminating point of the casing, the other end of said detonator means being in abutment against a locking member of deformable materials integral with the inner tube, a first charge of low sensitivity explosive disposed in the annular space in the terminating end portion of the casing, a second relay charge of high sensitivity disposed in the annular space in the terminating end portion of the casing, and means disposed in said annular space for maintaining the explosive in its position and in
  • An explosive cartridge for carrying out underwater explosions which comprises an inner tube surrounded by a cylindrical casing and defining an annular space therebetween, said casing being intergral with said inner tube and closing said annular space by terminating at one end of the cartridge, said cartridge being open at the other end and said inner tube extending beyond the terminating point of the casing and containing an internal narrowing of the inner tube at about said terminating point, detonator means maintained in a predetermined position in the cartridge with one end thereof in abutment against the internal narrowing of the tube between said tube and the tubular extension thereof at about the terminating point of the casing, a first charge of low sensitivity explosive disposed in the annular space in the terminating end portion of the casing, a second relay charge of high sensitivity disposed inside the inner tube behind the detonator and secured at one end to the detonator by a sleeve means, the other end of said second relay charge being in abutment against a locking member of deformable material integral with the inner tube and wherein means

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
US635052A 1966-05-03 1967-05-01 Explosive cartridge Expired - Lifetime US3491687A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR60135 1966-05-03

Publications (1)

Publication Number Publication Date
US3491687A true US3491687A (en) 1970-01-27

Family

ID=8607743

Family Applications (1)

Application Number Title Priority Date Filing Date
US635052A Expired - Lifetime US3491687A (en) 1966-05-03 1967-05-01 Explosive cartridge

Country Status (8)

Country Link
US (1) US3491687A (enrdf_load_stackoverflow)
DE (1) DE1646361A1 (enrdf_load_stackoverflow)
DK (1) DK130895B (enrdf_load_stackoverflow)
FR (1) FR1605060A (enrdf_load_stackoverflow)
GB (1) GB1166962A (enrdf_load_stackoverflow)
NL (1) NL6706242A (enrdf_load_stackoverflow)
NO (1) NO115772B (enrdf_load_stackoverflow)
SE (1) SE391234B (enrdf_load_stackoverflow)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3675574A (en) * 1969-11-28 1972-07-11 Davey Bickford Smith & Cie Sa Explosive device
US3788223A (en) * 1972-07-13 1974-01-29 Du Pont Explosive primer
US3831522A (en) * 1973-03-02 1974-08-27 R Romney Explosive booster and container therefor
US3931763A (en) * 1974-09-24 1976-01-13 Atlas Powder Company Explosive priming device
US3937296A (en) * 1969-04-21 1976-02-10 Hercules Incorporated Firing device, explosive charge, method, and system, for seismic exploration
US5614693A (en) * 1996-01-11 1997-03-25 The Ensign-Bickford Company Accessory charges for booster explosive devices
US5780764A (en) * 1996-01-11 1998-07-14 The Ensign-Bickford Company Booster explosive devices and combinations thereof with explosive accessory charges
US20070234921A1 (en) * 2006-03-28 2007-10-11 Schlumberger Technology Corporation Heat Insulating Container for a Detonator

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2913982A (en) * 1952-12-29 1959-11-24 Hercules Powder Co Ltd Priming device
US3212438A (en) * 1962-09-07 1965-10-19 Hercules Powder Co Ltd Priming device for blasting compositions
US3246602A (en) * 1964-07-09 1966-04-19 Gulf Oil Corp Explosive cartridge with rigid closure means
US3276372A (en) * 1965-04-28 1966-10-04 Hercules Powder Co Ltd Booster device
US3360070A (en) * 1964-12-18 1967-12-26 Inst Francais Du Petrole Apparatus for firing explosive charges under water

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2913982A (en) * 1952-12-29 1959-11-24 Hercules Powder Co Ltd Priming device
US3212438A (en) * 1962-09-07 1965-10-19 Hercules Powder Co Ltd Priming device for blasting compositions
US3246602A (en) * 1964-07-09 1966-04-19 Gulf Oil Corp Explosive cartridge with rigid closure means
US3360070A (en) * 1964-12-18 1967-12-26 Inst Francais Du Petrole Apparatus for firing explosive charges under water
US3276372A (en) * 1965-04-28 1966-10-04 Hercules Powder Co Ltd Booster device

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3937296A (en) * 1969-04-21 1976-02-10 Hercules Incorporated Firing device, explosive charge, method, and system, for seismic exploration
US3675574A (en) * 1969-11-28 1972-07-11 Davey Bickford Smith & Cie Sa Explosive device
US3788223A (en) * 1972-07-13 1974-01-29 Du Pont Explosive primer
US3831522A (en) * 1973-03-02 1974-08-27 R Romney Explosive booster and container therefor
US3931763A (en) * 1974-09-24 1976-01-13 Atlas Powder Company Explosive priming device
US5614693A (en) * 1996-01-11 1997-03-25 The Ensign-Bickford Company Accessory charges for booster explosive devices
US5780764A (en) * 1996-01-11 1998-07-14 The Ensign-Bickford Company Booster explosive devices and combinations thereof with explosive accessory charges
US20070234921A1 (en) * 2006-03-28 2007-10-11 Schlumberger Technology Corporation Heat Insulating Container for a Detonator
US7481166B2 (en) * 2006-03-28 2009-01-27 Schlumberger Technology Corporation Heat insulating container for a detonator
US20090090263A1 (en) * 2006-03-28 2009-04-09 Schlumberger Technology Corporation Heat insulating container for a detonator
US7673566B2 (en) * 2006-03-28 2010-03-09 Schlumberger Technology Corporation Method for use in a wellbore

Also Published As

Publication number Publication date
SE391234B (sv) 1977-02-07
DE1646361A1 (de) 1971-07-08
GB1166962A (en) 1969-10-15
NL6706242A (enrdf_load_stackoverflow) 1967-11-06
DK130895C (enrdf_load_stackoverflow) 1975-09-29
DK130895B (da) 1975-04-28
FR1605060A (enrdf_load_stackoverflow) 1973-01-12
NO115772B (enrdf_load_stackoverflow) 1968-11-25

Similar Documents

Publication Publication Date Title
US4425849A (en) Primer assembly
US4383484A (en) Primer assembly
US4335652A (en) Non-electric delay detonator
ES2700800T3 (es) Dispositivo reforzador de cebado
US4718345A (en) Primer assembly
US4215631A (en) Sealed pyrotechnic delay
US3491687A (en) Explosive cartridge
US3151447A (en) Igniter device
US3793954A (en) Dynamite detonator assembly
US3279372A (en) Seismic detonator
KR840002759A (ko) 비전기성 폭팔물
GB1081747A (en) Tracer shotgun cartridge
US3939772A (en) Blasting caps initiatable by thermal detonation energy of an explosive gas mixture, and blasting system
US2251918A (en) Antiaircraft projectile
GB1019950A (en) Improvements in priming devices for quick fuses
US3135204A (en) Means for explosively removing the nose cone of a missile
US3260202A (en) Explosive connector assembly
RU2678280C1 (ru) Контейнер для фиксации и установки патронов-боевиков и промежуточных детонаторов во взрывных скважинах
US4796533A (en) Primer assembly
EP0015697A1 (en) Non-electric delay detonator and assembly of a detonating cord and a delay detonator
GB1100374A (en) Grenade with a shaped hollow charge
US3547033A (en) Ignitor for explosive charge with means for preventing inadvertent ignition
RU2706994C1 (ru) Промежуточный детонатор
US2943572A (en) Fuze
US2842059A (en) Detonator