US3885499A - Thermal detonation energy-initiatable blasting caps, and detonation system and method - Google Patents

Thermal detonation energy-initiatable blasting caps, and detonation system and method Download PDF

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Publication number
US3885499A
US3885499A US426979A US42697973A US3885499A US 3885499 A US3885499 A US 3885499A US 426979 A US426979 A US 426979A US 42697973 A US42697973 A US 42697973A US 3885499 A US3885499 A US 3885499A
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United States
Prior art keywords
charge
shell
explosive gas
conduit means
ignition
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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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US426979A
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English (en)
Inventor
Eldon K Hurley
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Ireco Inc
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Hercules LLC
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Filing date
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Application filed by Hercules LLC filed Critical Hercules LLC
Priority to US426979A priority Critical patent/US3885499A/en
Priority to AR256981A priority patent/AR204644A1/es
Priority to CA211,479A priority patent/CA1028562A/fr
Priority to SE7413238A priority patent/SE418855B/xx
Priority to NO744057A priority patent/NO144230C/no
Priority to FI3360/74A priority patent/FI59580C/fi
Priority to DE2457622A priority patent/DE2457622C3/de
Priority to FR7441940A priority patent/FR2255571B1/fr
Priority to MX177030A priority patent/MX155149A/es
Priority to IE2612/74A priority patent/IE40558B1/xx
Priority to ES74433103A priority patent/ES433103A1/es
Priority to IT30772/74A priority patent/IT1027845B/it
Priority to BR10635/74A priority patent/BR7410635D0/pt
Priority to SU742088772A priority patent/SU850026A3/ru
Priority to AU76627/74A priority patent/AU491242B2/en
Priority to GB5490674A priority patent/GB1449560A/en
Priority to ES433102A priority patent/ES433102A1/es
Priority to ZA00748124A priority patent/ZA748124B/xx
Priority to PH16650A priority patent/PH13071A/en
Priority to JP49146647A priority patent/JPS5817156B2/ja
Priority to YU3403/74A priority patent/YU40109B/xx
Priority to ZM5/75A priority patent/ZM575A1/xx
Application granted granted Critical
Publication of US3885499A publication Critical patent/US3885499A/en
Priority to HK187/77A priority patent/HK18777A/xx
Priority to MY256/77A priority patent/MY7700256A/xx
Assigned to IRECO INCORPORATED, A CORP. OF DE. reassignment IRECO INCORPORATED, A CORP. OF DE. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: HERCULES INCORPORATED
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
    • F42D—BLASTING
    • F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
    • F42D1/04—Arrangements for ignition

Definitions

  • Also provided in a system including a plurality of the above blasting caps spaced apart for detonation of one or more main charges, together with additional conduit means for conveying the explosive gas to the plurality of blasting caps for the emplacement, and means for detonation of the thus emplaced explosive gas.
  • Method including passing a stream of the explosive gas along the emplacement route, for purging the system prior to the detonation, is also provided.
  • This invention relates to nonelectric blasting caps initiated by explosive energy from detonation of an explosive gas mixture.
  • this invention relates to a detonator system, including a plurality of. blasting caps above described, together with means for emplacing an explosive gas mixture in initiating relationship therewith and then detonating the gas mixture.
  • a further aspect of the invention relates to a method including detonation of a stream of an explosive gas mixture after emplacing it for detonation in ignition relationship with a responsively ignitable initiator charge(s) for the initiation of one or more main charges.
  • Nonelectric blasting caps generally comprise a closed shell loaded with base, primer and ignition charges in that order, often with a delay charge intermediate the primer and ignition charges, for initiation by action of a detonator cord extending into the cap shell in ignition relationship with the ignition system.
  • the primer charge is detonatable in response to burning of the delay, or ignition, charge and the base charge is detonatable in response to detonation of the primer charge.
  • the delay charge, or fuse is disposed to burn over a predetermined time duration to delay communication of the ignition charge with the primer for the detonation.
  • Other types of nonelectric type blasting caps include those such as of the squib or deflagrating types, in which the ignitable initiator charge can be the only charge in the blasting cap, or it can be operatively associated with one or more additional charges.
  • detonator cord type initiators In the utilization of detonator cord type initiators in the initiation of delay blasting caps, the resulting force of detonation causes rupture of the cap shell often with undue venting of heat and pressure developed in the ignition area with failure to ignite the delay fuse and hence failure of the shot.
  • the choice of main explosive charge to be detonated by a detonator cord type initiator is limited to that which is not directly responsive to detonation of the cord. Further, a detonator cord type initiator often functions to prepressurize the explosive, thus resulting in decreased energy from the main charge.
  • detonation utilizing a detonator cord type initiator is extremely noisy and is the subject of many complaints associated with blasting operations; and detonator initiator cord, PETN (or equivalent) filled, is subject to all precautionary measures required for handling explosives, and is, of course, subject to shipping restrictions.
  • This invention is concerned with a nonelectrically initiated blasting cap assembly, a nonelectrically initiated detonator system, and a method for nonelectrical initiation, providing for the elimination of numerous problems associated with the use of detonator cord type initiators.
  • a nonelectrically initiated blasting cap which comprises a shell; an initiator charge in said shell ignitable in response to action of thermal detonation energy of an explosive gas mixture; a first conduit means extending into said shell in communication with said initiator charge so as to convey an explosive gas mixture as a confined stream into detonating position for responsive ignition of said initiator charge; and a second conduit means extending from the zone of said communication to the outside of said shell, whereby a stream of said explosive gas mixture can be continuously passed from said first conduit means through said zone of communication and through said second conduit means to purge said zone of gases other than said explosive gas mixture and thereafter explosive gas mixture in said first conduit means can be detonated for propagation of resulting thermal detonation energy to said communication zone for ignition of said initiator charge.
  • the second conduit means is generally a tubular member extending through an end, or side wall, of the shell so as to convey an exit flow of the explosive gas mixture from the zone of communication in the shell during the purge, and to an adjacent, and similar, blasting cap, when a plurality of such blasting caps are components of a detonator system described more fully hereinafter.
  • the second conduit means is a passageway, or opening, through a side wall of the cap shell thus similarly providing the exit flow of explosive gas mixture from the shell for the purging action.
  • a blasting cap of the invention comprises a closed elongated shell, including a plug end closure member; base, primer and ignition charges, with or without a delay charge intermediate the primer and ignition charges, extending in that order toward the plug closure from the opposite shell end, and said ignition charge spaced from said ignition plug to provide a resulting intermediate open space; a first tube extending into said shell through the plug closure and terminating in direct communication with said open space; and a second tube extending from the above described open space through at least a portion of the plug closure to the outside of said shell.
  • a detonator system for one or more main charges which comprises a plurality of spaced apart nonelectrically initiated blasting caps, each said blasting cap comprising (l) a shell, (2) an initiator charge in said shell ignitable in response to action of thermal detonation energy of an explosive gas mixture, (3) a first conduit means extending into said shell into communication with said initiation charge so as to convey an explosive gas mixture as a confined stream into detonating position for responsive ignition of said initiator charge, or to convey said explosive gas mixture as a purge stream for the zone of said communication and (4) a second conduit means extending from said zone to the outside of said shell for egress purge flow of the explosive gas mixture from said zone; a third conduit means external to said plurality of blasting caps connecting through each said first conduit means for conveying a confined stream of said explosive gas mixture thereinto; and means for detonating said explosive gas mixture when confined in said third conduit means.
  • a method for initiating a nonelectric blasting cap for the detonation of a main charge, wherein said blasting cap contains an initiator charge ignitable in response to action of thermal detonation energy of an explosive gas mixture, said method comprising passing an explosive gas mixture into said blasting cap and into operative communication therein with said initiator charge for detonation and responsive ignition of said ignition charge and then from the zone of said communication to the outside of said blasting cap to purge said zone of gases other than said explosive gas. thereafter retaining said explosive gas mixture as a confined stream along the path of said purge and detonating same upstream from said blasting cap, and propagating resulting thermal detonation energy along said path into ignition relationship with said initiator charge.
  • FIG. 1 illustrates a zero delay type blasting cap of the invention, including a pair of tubular members supported in an ignition plug end closure for ingress and egress of the explosive gas mixture during the purge operation, and thereafter for ingress of thermal detonation energy from detonation of the explosive gas mixture;
  • FIG. 2 is a delay type blasting cap otherwise the same as that of FIG. 1;
  • FIG. 3 is the same as FIGS. 1 or 2 except that in lieu of the egress flow tube, an open passageway is disposed in the side wall of the shell for egress of the explosive gas mixture during the purge operation;
  • FIG. 4 illustrates a plurality of any of the blasting caps of FIGS. 1 and 2 as elements of a detonator system of the invention
  • FIG. 5 is the same as FIG. 4 except that it illustrates a plurality of blasting caps of FIG. 3;
  • FIG. 6 illustrates an embodiment of blasting system of the invention including a plurality of blasting caps of either or both of FIGS. 1 and 2 supported for detonation of a series of separate main explosive charges; and FIGS. 4-6 particularly illustrate method of the invention.
  • Like parts in the drawings are designated by like numbers.
  • elongated shell of zero delay type blasting cap 9 is integrally closed at bottom end 1 l and is closed at the opposite end 12 by ignition plug end closure 13.
  • Base explosive charge 14, primer charge 16 and ignition charge 17 extend in that order in shell 10 from bottom end 11 toward closure plug 13, and ignition charge 17 is spaced from inner face 13' of plug 13 to provide resulting intermediate void space, or cavity, 18.
  • a first tube 19 extends from outside shell 10 through plug closure 13 into communication with charge 17 through void space 18.
  • a second tube 21 extends through plug 13 from a point in communication with void space 18 to a point outside shell 10.
  • Base charge 14 is detonatable in response to detonation of primer charge 16 and primer 16 is detonatable in response to ignition of ignition charge 17.
  • Base charge 14 is any suitable high explosive charge such as PETN, RDX, Tetryl, or the like, for detonation to produce explosive energy for detonation of a main explosive charge in detonating relationship therewith.
  • primer charges 16 are diazodinitrophenol, often a diazodinitrophenol system of the well known type including a top layer for ignition in response to ignition of the charge 17 and a lower-and higher-density layer detonatable in response to ignition of the top layer.
  • Further exemplary primer charges 16 are diazodinitrophenol/potassium chlorate, lead azide and mercury fulminate.
  • Ignition charge 17 is any suitable charge utilized in an ignition/primer/base charge blasting cap assembly, with or without a delay charge intermediate the ignition and primer charges, and ignitable in response to action of thermal detonation energy of an explosive gas mixture, illustrative of which are leadselenium, lead-tin/selenium, tin/selenium, red lead/boron, and lead oxide/manganese.
  • Tube 19 is generally a plastic tube, as for example 0.103 inch OD by 0.060 inch ID and formed from polyethylene; and confines a stream of the explosive gas mixture for flow into void space 18; and tube 21 is the same, or similar in design and composition to tube 19.
  • Tube 21, in communication with void space 18, serves to convey a stream of explosive gas mixture from void space 18, during the purging operation and, as an element of the detonator system of the invention, to direct propagating detonation energy from open space 18.
  • blasting cap assembly 9 a stream of an explosive gas mixture such as a mixture of oxygen with a fuel such as manufactured gas, acetylene, hydrogen, or hydrogen/methane, is passed into open space 18 through tube 19 and is thus emplaced so that, upon detonation, the resulting thermal detonation energy propagates into ignition relationship with ignition charge 17.
  • an explosive gas mixture such as a mixture of oxygen with a fuel such as manufactured gas, acetylene, hydrogen, or hydrogen/methane
  • FIG. 2 illustrates another embodiment, which is the same as that of FIG. 1 except that the blasting cap 9' is of the delay type and contains a delay fuse assembly 22 intermediate the ignition 17 and primer 16 charges.
  • charge 17 of FIG. 2 differs in composition from that of FIG. 1 to the extent necessary to assure a sufficiently hot ignition for delay fuse 23, which is conventionally disposed as a core 23 in a swaged metal tube 24 in ignitable relationship with ignition charge 17 and in detonating relationship with primer 16.
  • a wafer type charge (not specifically shown) which has a higher heat of reaction than that of charge 17 and serves as a supplemental source of heat for ignition of the delay fuse, is positioned subjacent charge 17.
  • Such wafer type charges are generally utilized in combination with longer burning and hence less ignition sensitive delay charges as disclosed in US. Pat. No. 3,776,135.
  • FIG. 3 illustrates a blasting cap 8 which is the same as the blasting caps of FIGS. 1 and 2 except that in lieu of the tube 21, a conduit, or passageway 26, extends from open communication with cavity 18 through a side wall of shell 10.
  • a series of five blasting caps A-E inclusive can be any of blasting caps 9 and 9' of FIGS. 1 and 2, each for being disposed in detonating relationship with a booster or main explosive charge (neither shown) and are in series with the discharge line from a gas mixing and ignition system 27, comprising fuel gas supply 28 connecting through line 29, gas flow control meter 31 and line 30 with gas mixing/ignition chamber 32; and oxidizer gas supply 33 connecting through line 34, flow control meter 36 and line 37 with gas mixing- /ignition chamber 32.
  • a suitable fuel gas generally a manufactured gas, or hydrogen
  • supply 28 via line 29, through flow meter 31 which in turn controls the requisite rate of flow and pressure of fuel gas through line 30 to mixing chamber 32 for mixing therein with oxidizer gas from supply 33.
  • oxidizing gas is passed from supply 33 via line 34, through flow meter 36 which in turn controls the requisite rate of flow and pressure ofoxidizer gas through line 37 in the required proportions for the mixing step in chamber 32.
  • the relative proportions of fuel and oxidizer are predetermined to provide an explosive gas mixture which is then ignited in chamber 32 by spark generated by action of spark plug 39 operatively extending into chamber 32 for that purpose.
  • Conduit 38 extends from chamber 32 and connects through a suitable collar, or sleeve, type connector 38a with inlet tube 19 of a first blasting cap 9 of the series A-E to convey flow of the explosive gas mixture from chamber 32 through tube member 19, void space 18 and exit flow tube 21, and in series through each of the successive caps B-E to thereby purge each void space 18 of substantially all gas other than that from line 38.
  • Tube 21 of each of blasting caps 4A-D connects with tube 19 of the succeeding blasting cap of the series A-E by any suitable means, such as by a plastic collar, or sleeve, connector 20.
  • the stream of explosive gas mixture from line 38 is passed in series through tube 19, open space 18 and tube 21 of each of caps A-E; and the flow of explosive gas through the series A-E is maintained for a time duration sufficient to complete the requisite purge of all blasting cap cavity portions 18, generally a period of at least about one minute often from five to ten' minutes dependent upon the flow variables involved.
  • the ignitor member 39 Upon completion of the purging action, and with the flow of the explosive gas mixture in line 38 at the desired pressure and flow rate levels, the ignitor member 39 is actuated, and, by action of the spark, the explosive gas mixture thus emplaced for detonation and responsive ignition of the ignition charge, is detonated.
  • Check valve system 35 in chamber 32 precludes back pressure flow of explosive energy into the upstream flow and supply stream.
  • the detonation wave front then travels,'confined in line 38 and each of tubes 19 and 21 through each cavity 18 in series A-E.
  • the explosive gas mixture flow is generally continued through line 38 for the detonation, the flow can be terminated for subsequent detonation'of the emplaced, but nonflowing, explosive gas mixture.
  • one or more of the tubes 19 and 21 may fail to confine the explosive energy, in which event the detonation rate of the particular explosive gas is sufficiently high to permit the detonation wave front to travel ahead of the tube breakage so that the latter does not preclude series travel of the detonation wave front through the series of caps.
  • FIG. 5 illustrates another embodiment of detonator system of the invention the same as that in FIG. 4 except that blasting caps 8 of FIG. 3 are in lieu of those of FIGS. 1 or 2.
  • a continuous stream of an explosive gas mixture from chamber 32 is passed through line 38 as a manifold supply connecting by suitable connector means, such as a collar or sleeve 25, with each of the caps A E respectively to supply a stream of explosive gas mixture through each tube 19 into each corresponding void space 18AE; and in lieu of the series type purging action of FIG. 4, the explosive gas mixture from each void space 18 is discharged therefrom through the conduit, or opening, 26 in a side wall of each cap assembly.
  • suitable connector means such as a collar or sleeve 25
  • the explosive gas mixture in line 38 is detonated by action of spark generation means in chamber 32.
  • the detonation front then travels along line 38 through each tube 19, to, in each instance, emplace the resulting thermal detonation energy in ignition contact with the ignition charge.
  • each of the separate bore holes 41, in earth formation 40, of FIGS. 6A-C is loaded with any suitable cap-insensitive main explosive charge 42 such as an aqueous gel type explosive, a dynamite, prills/fuel oil, or the like.
  • a pair of suitable boosters 43 is embedded in each of the main explosive masses. Each booster is cap-sensitive and is in detonating relationship with the main explosive charge adjacent thereto, and is initiated by action of a blasting cap system of the invention such as that of FIG. 4.
  • booster units 43 e.g. each 500 grams of PETN, tetryl or the like, are embedded, and spaced apart, in explosive mass 42 to provide for detonation of the main explosive charge along its entire length.
  • Each booster unit 43 contains a blasting cap 9 or 9 of FIGS. 1 or 2.
  • the explosive gas mixture from chamber 32 is supplied via line 38 and passed in series through the entire plurality of blasting caps 9 and/or 9 in the separate booster charges in the three bore holes via tubes 19 and 21 of each blasting cap, as illustrated with reference to FIG. 4.
  • the system of FIG. 6 containing delay caps regulates the burning time of each delay fuse and hence the delay between shots in each bore hole including when desired, a progressively longer delay time along the entire series of boosters in the bore holes of FIG. 6.
  • blasting cap assemblies in which the initiator charge is the only charge in the blasting cap, or is utilized with one or more additional charges, exemplary of which blasting caps are those of the deflagrating or squib type.
  • ignition charges EXAMPLE 1 A stream of manufactured gas Type B comprising, on a volume basis, 24% methane, 3% ethane, 18% carbon monoxide, and 55% hydrogen, was passed at a rate of 1.5 liters per minute at 50 psi together with a separate stream of oxygen at the rate of 1.5 liters per minute at 50 psi into a mixing chamber to form a resulting explosive gas mixture which was then passed from the mixing chamber through 100 feet of 0.25 inch OD by 0.125 inch ID polyethylene tubing and then in series through 108 blasting caps of the type specifically illustrated with reference to FIGS. 1 and 2.
  • each tube 19 and 21 was 0.103 inch OD 1"" 0.060 inch ID and formed from polyethylene; and i ended two feet from the top of the ignition plug.
  • the base charge was 0.40 gram PETN and the primer charge was 0.30 gram diazodinitrophenol, of which 0.06 gram was pressed on an open end capsule at a density of about 1.6 grams per cc. and the remainder was contained in the capsule at a density of about 1.10 grams per cc.
  • the wafer charge was Fe O /AI/B/FbSn/Se/SnoW Floss (15.0/l2.0/2.5/48.6/l8.9/3.0), 0.20 gram; and the delay charge was BaO /Te/Se (40/40/20) in amount and length providing the respective l, 2.9, 4.5 and 9 second average burning times.
  • Example 2 The procedure of Example 1 was repeated except that an oxygen flow rate of 0.2 liter per minute was utilized with a flow rate of manufactured gas Type B at 0.2 liter per minute in series with 99 delay blasting caps of FIG. 2 each delay charge having an average burning time of 9 seconds. Ninety-eight of the shots fired and the unsuccessful shot was found to be due to a break in the delay fuse column.
  • any suitable explosive gas mixture can be utilized in practice'of the invention, those having relatively high detonation rates, such as at least about 2,000 meters per second are often advantageously utilized; and when a spark generating system, such as illustrated with reference to FIG. 4, is utilized, the preferred explosive gas mixture is one which yields carbon monoxide and carbon dioxide upon detonation to aid in sweeping water from the mixing and ignition system which would otherwise foul and corrode the spark generation element. Accordingly, any suitable organic fuel gas/oxygen/hydrogen is now a preferred explosive gas mixture utilized, including such gas mixture as manufactured gas Type B, and oxygen/methane/hydrogen mixtures.
  • thermal detonation energy it is meant heat and flame produced by the detonation of the explosive gas mixture.
  • a blasting cap of claim 1 said shell being elongated. and a plug closure member therefor; an ignition charge, as said initiator, in spaced apart relationship with said plug to provide said open space; base, primer and said ignition charges, with or without a delay charge intermediate said primer and ignition charges, extending in that order toward said plug closure and said first conduit means comprising a tube extending from outside said shell through said plugclosure and opening into said open space.
  • said second conduit means comprising a passageway in a side wall of said shell.
  • said second conduit means comprising an additional tube extending through said plug closure.
  • a detonator system for detonation of one or more main charges comprising a plurality of spaced apart nonelectrically initiated blasting caps, each said blasting cap comprising (1) a closed shell, (2) an initiator charge in said shell ignitable in response to action of thermal detonation energy of an explosive gas mixture and said shell containing an open space adjacent said initiator charge; (3) a first conduit means extending from outside said shell into said open space in direct open communication with said initiator charge so as to convey an explosive gas mixture as a confined stream into detonating position in said open space for responsive ignition of said ignition charge, or to convey said explosive gas mixture as a purge stream for said open space, and (4) a second conduit means extending from said open space to the outside of said shell for egress purge flow of said explosive gas mixture from said open space prior to detonation of said confined stream for said responsive ignition; a third conduit means external to said plurality of blasting caps connecting through each said first conduit means for conveying a confined stream of said explosive gas mixture thereinto
  • each said blasting cap shell being elongated and a plug closure member therefor; an ignition charge, as said initiator charge, disposed in each said shell in spaced apart relationship with saidclosure plug therein to provide said open space; base, primer and said ignition charges in each said shell, with or without a delay charge intermediate said primer and ignition charges, extending in that order toward said plug closure; and said first conduit means in said each shell extending from outside said shell through said plug closure and opening into said open space.
  • each said blasting cap containing as said first conduit means a first tube extending through the closure plug thereof, and as said second conduit means a second tube extending through said closure plug.
  • each said blasting cap containing as said second conduit means a passageway in a side wall of the shell.
  • said third conduit means connecting with said first tube of a first of a series of said blasting caps, and said first tube of each succeeding blasting cap connecting with said second tube of a preceding blasting cap so as to dispose said blasting caps for series flow of confined, or purging, gas therethrough.
  • said third conduit means extending outside said plurality of blasting caps, and the first conduit means of each blasting cap connecting in open communication with said third conduit means so as to receive a separate flow of said explosive gas mixture therefrom.
  • each said blasting cap being integrally closed at one end, and an ignition plug, as said plug closure, closing said shell at the other end; base, primer, delay and said ignition charges in each said blasting cap extending in that order toward said ignition plug from the integrally closed shell end; as said third conduit means, a third tube connecting at one end with a source of said explosive gas mixture and at the other end with said first tube of a first of a series of said blasting caps; and said first tube of each succeeding blasting cap connecting with said second tube of a preceding blasting cap so as to dispose said blasting caps for series flow of confined, or purging, gas therethrough.
  • a method for initiating a nonelectric blasting cap for the initiation of a main charge wherein said blasting cap contains an initiator charge ignitable in response to action of thermal detonation energy of an explosive gas mixture, said method comprising passing an explosive gas mixture into said blasting cap and into operative communication therein with said initiation charge for detonation and responsive ignition of said initiation charge and then from the zone of said communication to the outside of said blasting cap to purge said zone of gases other than said explosive gas, thereafter retaining said explosive gas as a confined stream along the path of said purge and detonating same upstream from said blasting cap, and propagating resulting thermal explosive energy along said path into ignition relationship with said initiation charge.

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  • General Engineering & Computer Science (AREA)
  • Air Bags (AREA)
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  • Portable Nailing Machines And Staplers (AREA)
  • Professional, Industrial, Or Sporting Protective Garments (AREA)
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US426979A 1973-12-20 1973-12-20 Thermal detonation energy-initiatable blasting caps, and detonation system and method Expired - Lifetime US3885499A (en)

Priority Applications (24)

Application Number Priority Date Filing Date Title
US426979A US3885499A (en) 1973-12-20 1973-12-20 Thermal detonation energy-initiatable blasting caps, and detonation system and method
AR256981A AR204644A1 (es) 1973-12-20 1974-01-01 Capsula explosiva iniciable sin electricidad
CA211,479A CA1028562A (fr) 1973-12-20 1974-10-16 Detonateurs explosibles sous l'effet de l'energie thermique engendree par la detonation d'un gaz, et systeme et methode connexes
SE7413238A SE418855B (sv) 1973-12-20 1974-10-21 For tendning pa icke elektrisk veg avsedd sprengkapsel
NO744057A NO144230C (no) 1973-12-20 1974-11-11 Fenghette med ikke-elektrisk tenning, og avfyringssystem for flere slike fenghetter
FI3360/74A FI59580C (fi) 1973-12-20 1974-11-20 En pao ickeelektrisk vaeg taendbar spraengkapsel
DE2457622A DE2457622C3 (de) 1973-12-20 1974-12-05 Nichtelektrisch zundbare Sprengkapsel und Sprengsystem unter Verwendung der Sprengkapsel sowie Zundverfahren
FR7441940A FR2255571B1 (fr) 1973-12-20 1974-12-13
MX177030A MX155149A (es) 1973-12-20 1974-12-16 Sistema detonador mejorado para una o mas cargas
IE2612/74A IE40558B1 (en) 1973-12-20 1974-12-18 Thermal detonation energy-initiatable blasting caps, and detonation system and method
SU742088772A SU850026A3 (ru) 1973-12-20 1974-12-19 Детонирующее устройство
BR10635/74A BR7410635D0 (pt) 1973-12-20 1974-12-19 Espoleta nao iniciada eletricamente sistema detonador e processo para iniciacao de uma espoleta nao eletrica
ES74433103A ES433103A1 (es) 1973-12-20 1974-12-19 Un sistema detonador.
AU76627/74A AU491242B2 (en) 1973-12-20 1974-12-19 Thermal detonation energy initiatable blasting caps, and detonation system and method
GB5490674A GB1449560A (en) 1973-12-20 1974-12-19 Thermal detonation energy-initiatable blasting caps and detonation system and method
ES433102A ES433102A1 (es) 1973-12-20 1974-12-19 Un cebo para explosivos.
IT30772/74A IT1027845B (it) 1973-12-20 1974-12-19 Capsule di detonazione innescate mediante energia ti detonazione termicha sistema di detonazionee motedo relativo
PH16650A PH13071A (en) 1973-12-20 1974-12-20 Thermal detomation energy-initiatable blasting cars and detonation system and method
ZA00748124A ZA748124B (en) 1973-12-20 1974-12-20 Thermal detonation energy - initiatable blasting caps, and detonation system and method
JP49146647A JPS5817156B2 (ja) 1973-12-20 1974-12-20 非電気式点火方法及びそれ用の雷管
YU3403/74A YU40109B (en) 1973-12-20 1974-12-20 Detonator ectivated by means of heat detonation energy
ZM5/75A ZM575A1 (en) 1973-12-20 1975-01-10 Thermal detonation energy-initiatable blasting caps and detonation system and method
HK187/77A HK18777A (en) 1973-12-20 1977-04-20 Thermal detonation energy-initiatable blasting caps, and detonation system and method
MY256/77A MY7700256A (en) 1973-12-20 1977-12-30 Thermal detonation energy initiatable blasting caps, and detonation system and method

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US426979A US3885499A (en) 1973-12-20 1973-12-20 Thermal detonation energy-initiatable blasting caps, and detonation system and method

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US3885499A true US3885499A (en) 1975-05-27

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JP (1) JPS5817156B2 (fr)
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Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3939772A (en) * 1974-10-04 1976-02-24 Hercules Incorporated Blasting caps initiatable by thermal detonation energy of an explosive gas mixture, and blasting system
US3999609A (en) * 1975-06-09 1976-12-28 Cabot Corporation Explosive well stimulation method
FR2315339A1 (fr) * 1975-06-27 1977-01-21 Ici Ltd Procede et dispositif pour provoquer l'expansion radiale d'un tube metallique
US4041867A (en) * 1974-12-04 1977-08-16 Nitro Nobel Ab Conductor containing explosive gas mixture for initiation of ignition element and explosive charge
US4056059A (en) * 1976-07-30 1977-11-01 Hercules Incorporated Closed initiator system including explosive energy-initiatable blasting caps, and method
US4073235A (en) * 1976-07-30 1978-02-14 Hercules Incorporated Explosive energy-initiatable blasting caps containing a porous ignition and detonation system and method
US4485739A (en) * 1983-03-02 1984-12-04 H. L. & A. G. Balsinger, Inc. Detonation gas delivery unit
US4757764A (en) * 1985-12-20 1988-07-19 The Ensign-Bickford Company Nonelectric blasting initiation signal control system, method and transmission device therefor
US4821645A (en) * 1987-07-13 1989-04-18 Atlas Powder Company Multi-directional signal transmission in a blast initiation system
US4821646A (en) * 1987-06-29 1989-04-18 Cxa Ltd./Cxa Ltee Delay initiator for blasting
US4953464A (en) * 1987-07-13 1990-09-04 Atlas Powder Company Multi-directional signal transmission in a blast initiation system
US5223766A (en) * 1990-04-28 1993-06-29 Sony Corporation Image display device with cathode panel and gas absorbing getters
AU646261B2 (en) * 1990-06-22 1994-02-17 Cxa Ltd./Cxa Ltee Delay initiator for blasting
US5515784A (en) * 1994-08-09 1996-05-14 The Ensign-Bickford Company Signal transmission devices and detonation systems using the same
WO1997025298A1 (fr) * 1996-01-11 1997-07-17 The Ensign-Bickford Company Detonateurs comportant des conducteurs d'entree a lignes multiples
US6588797B1 (en) 1999-04-15 2003-07-08 Trw Inc. Reduced smoke gas generant with improved temperature stability

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4012481A (en) * 1975-11-07 1977-03-15 Pgp Industries, Inc. Process for the separation of platinum group metals
DE2758550C2 (de) * 1977-12-23 1986-01-30 Schering AG, 1000 Berlin und 4709 Bergkamen Verfahren zur Entfernung von Restmengen einer Behandlungsflüssigkeit von Gegenständen und Vorrichtung zur Durchführung des Verfahrens
JPH01164863U (fr) * 1989-04-07 1989-11-17
JP5184322B2 (ja) * 2008-12-08 2013-04-17 株式会社カコー 爆破の制御方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1025065A (en) * 1912-04-30 W E Ingram Blasting fuse and cap.
US1185916A (en) * 1915-09-25 1916-06-06 Samuel Allen Guiberson Jr Fuse-lighter.
US3597919A (en) * 1969-03-24 1971-08-10 Gen Electric Linear gas generator actuated latching and thrusting device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1025065A (en) * 1912-04-30 W E Ingram Blasting fuse and cap.
US1185916A (en) * 1915-09-25 1916-06-06 Samuel Allen Guiberson Jr Fuse-lighter.
US3597919A (en) * 1969-03-24 1971-08-10 Gen Electric Linear gas generator actuated latching and thrusting device

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3939772A (en) * 1974-10-04 1976-02-24 Hercules Incorporated Blasting caps initiatable by thermal detonation energy of an explosive gas mixture, and blasting system
US4041867A (en) * 1974-12-04 1977-08-16 Nitro Nobel Ab Conductor containing explosive gas mixture for initiation of ignition element and explosive charge
US3999609A (en) * 1975-06-09 1976-12-28 Cabot Corporation Explosive well stimulation method
FR2315339A1 (fr) * 1975-06-27 1977-01-21 Ici Ltd Procede et dispositif pour provoquer l'expansion radiale d'un tube metallique
US4056059A (en) * 1976-07-30 1977-11-01 Hercules Incorporated Closed initiator system including explosive energy-initiatable blasting caps, and method
US4073235A (en) * 1976-07-30 1978-02-14 Hercules Incorporated Explosive energy-initiatable blasting caps containing a porous ignition and detonation system and method
US4485739A (en) * 1983-03-02 1984-12-04 H. L. & A. G. Balsinger, Inc. Detonation gas delivery unit
US4757764A (en) * 1985-12-20 1988-07-19 The Ensign-Bickford Company Nonelectric blasting initiation signal control system, method and transmission device therefor
US4821646A (en) * 1987-06-29 1989-04-18 Cxa Ltd./Cxa Ltee Delay initiator for blasting
US4821645A (en) * 1987-07-13 1989-04-18 Atlas Powder Company Multi-directional signal transmission in a blast initiation system
US4953464A (en) * 1987-07-13 1990-09-04 Atlas Powder Company Multi-directional signal transmission in a blast initiation system
US5223766A (en) * 1990-04-28 1993-06-29 Sony Corporation Image display device with cathode panel and gas absorbing getters
AU646261B2 (en) * 1990-06-22 1994-02-17 Cxa Ltd./Cxa Ltee Delay initiator for blasting
US5293821A (en) * 1990-06-22 1994-03-15 Ici Canada Inc. Delay initiator for blasting
US5515784A (en) * 1994-08-09 1996-05-14 The Ensign-Bickford Company Signal transmission devices and detonation systems using the same
WO1997025298A1 (fr) * 1996-01-11 1997-07-17 The Ensign-Bickford Company Detonateurs comportant des conducteurs d'entree a lignes multiples
US5747722A (en) * 1996-01-11 1998-05-05 The Ensign-Bickford Company Detonators having multiple-line input leads
US6588797B1 (en) 1999-04-15 2003-07-08 Trw Inc. Reduced smoke gas generant with improved temperature stability

Also Published As

Publication number Publication date
ZA748124B (en) 1976-01-28
PH13071A (en) 1979-11-23
HK18777A (en) 1977-04-29
FI59580C (fi) 1981-09-10
SE418855B (sv) 1981-06-29
AU7662774A (en) 1976-06-24
MY7700256A (en) 1977-12-31
GB1449560A (en) 1976-09-15
DE2457622B2 (de) 1978-01-26
DE2457622C3 (de) 1978-09-28
AR204644A1 (es) 1976-02-20
FI59580B (fi) 1981-05-29
ZM575A1 (en) 1975-10-21
SU850026A3 (ru) 1981-07-23
IE40558B1 (en) 1979-07-04
IT1027845B (it) 1978-12-20
YU40109B (en) 1985-08-31
JPS5095412A (fr) 1975-07-29
IE40558L (en) 1975-06-20
YU340374A (en) 1982-02-28
ES433103A1 (es) 1976-11-16
SE7413238L (fr) 1975-06-23
FI336074A (fr) 1975-06-21
NO144230C (no) 1981-07-22
ES433102A1 (es) 1976-12-01
MX155149A (es) 1988-02-01
NO144230B (no) 1981-04-06
JPS5817156B2 (ja) 1983-04-05
FR2255571A1 (fr) 1975-07-18
DE2457622A1 (de) 1975-06-26
BR7410635D0 (pt) 1975-09-02
NO744057L (fr) 1975-07-14
CA1028562A (fr) 1978-03-28
FR2255571B1 (fr) 1978-10-13

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