US2558163A - Blasting explosive package - Google Patents

Blasting explosive package Download PDF

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Publication number
US2558163A
US2558163A US51828A US5182848A US2558163A US 2558163 A US2558163 A US 2558163A US 51828 A US51828 A US 51828A US 5182848 A US5182848 A US 5182848A US 2558163 A US2558163 A US 2558163A
Authority
US
United States
Prior art keywords
cartridges
explosive
tube
package
rigid
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
US51828A
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English (en)
Inventor
Harold R Wright
William G Allan
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.)
Imperial Chemical Industries Ltd
Original Assignee
Imperial Chemical Industries Ltd
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 Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Application granted granted Critical
Publication of US2558163A publication Critical patent/US2558163A/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
    • F42B3/00—Blasting cartridges, i.e. case and explosive
    • 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
    • F42B3/02—Blasting cartridges, i.e. case and explosive adapted to be united into assemblies

Definitions

  • the present invention relates to improvements in columnar blasting explosive packages of the kind wherein a rigid tubular sheath of cardboard or the like holds a succession of detonating explosive cartridges in alignment along its length so they will-transmit a detonation from one to another along the column.
  • compositions use for instance cast or compressed compositions based on aromatic polynitrocompounds, solid explosive nitricvesters or nitramines either alone or in admixture are commonly of a rigid consistency, and they are usually less easy to in ⁇ tiate than nitroglycerine explosives. For this reason it may be necessary to .interpose a booster of a more sensitive detonating explosive between the detonator and the main charge of the detonating explosive.
  • the main charge or the booster as the case may be is shaped to accommodate a detonator.
  • a columnar blasting explosive package containing a number of cartridges comprising a rigid high velocity explosive composition in le in a unitary it, to the inner wall of which are adhesively at- ⁇ tached a number of similarly oriented cartridges of rigid detonating explosive each shaped at one end to accommodate a detonator, whereof at least the terminal portions so shaped consist of an explosive sensitive to initiation directly by a detonator, said cartridges being separated from one another in the tube by deformable spacing members each covering only a portion of the end surface of each cartridge and being of insumcient thickness to lprevent the transmission of detonation from one cartridge to the next, the tube being distinctively marked on its exterior wall opposite each spacing member.
  • the marks serve to indicate to the operator the line around which the tube should be cut in order to divide it at the correct position to permit insertion of a detonator.
  • the main portion of the explosive if not sulcently sensitive to be directly initiated by a detonator, may conveniently be cast around a pellet booster, the booster explosive being directly sensitive to a detonator.
  • Each explosive charge may be contained in a cup of paper or other suitable material with the booster, if present, at one end.
  • the cartridges may be located in the rigid tube by meansA of a each cartridge.
  • the rigid tube is desirably made of cardboard, thick pasteboard, thick paper or like rigid material that can be cut by means of a knife, and is marked opposite the discs separating the individual cartridges with indentations or surfacemarks.
  • One or both ends. of ⁇ the tube may be turned over, provided access is left for a detonator to be inserted into the end of the terminal cartridgeshaped to accommodate it, e. g. by leaving the turned over end open at the middle or by providing an easily rupturable end closure. Such turning over assists in the support of the cartridges within the tube.
  • FIG. 4 is an end elevation of the assembly illustrated in Figure 3 and Figure 5 is an enlarged detail in axial section of one of the cartridges accommodated in the package illustrated in Figure l and in the assembly illustrated in Figure 3.
  • the rigid waxed cardboard tube I has an open helical ridge 2 formed along its outer surface and has a cylindrical inner surface. Terminal portions of its length are turned over leaving a central hole around 6, as is best seen at 3 in Figures 2, 3, andA 4.
  • a series of marks 4, seen only in Figure 1. are located so as to lie exactly over a series of annular felt spacing discs 5 seen in Figure 3 separating the explosive cartridges C from one another.
  • the external coupling tube I has a helical slot 8 running along its internal surface in which the heli- ⁇ cal ridge 2 can run as seen in Figures 3 and 4.
  • Each explosive cartridge C has a thin paper container 9 folded over at one end into the form of a cup into which there is laid a thin paper disc I cemented to the base of a pellet primer II axially channeled to accommodate a detonator not shown.
  • the primer I has a thin paper disc I2 covering its other end, and a charge I3 of a high velocity rigid explosive is cast into the paper cup around the pellet booster.
  • the explosive charge I3 becomes rigid when it solidifles. It may advantageously consist of a mixture of TNT and tetryl ⁇ in the proportions 75:25 by weight, and the pellet primer may be made of compressed tetryl, PETN or cyclotrimethylene trinitramine.
  • each cartridge C is smeared with a cement not shown in the drawing, e. g. one based on nitrocellulose, capable of adhering to the waxed inner surface of the tube I, only one of the ends of which is turned over at this stage.
  • the rst cartridge is then loaded into the tube I so as to rest on the turned over end of the tube. and the annular felt spacing disc is laid over it.
  • the next cartridge is then introduced so as to rest in the same orientation over the aforesaid felt spacing disc, and so forth until the required number of cartridges and spacing discs have been introduced.
  • the remote end of the tube I is then turned over.
  • the tube I is cut through by an operator at the mark lying over the spacing disc between the second and third cartridges, so as to subdivide the package between these two cartridges.
  • the felt spacing disc thus exposed is removed and discarded.
  • one of the packages is similarly subdivided between the second and third cartridge and the smaller of the resulting cut packages is coupled with an undivided package provided with a screw sheath as shown in Figure 3, by screwing the sheath relative to the packet so as to engage the thread on the surface of the cut package abutted endwise to said undivided package.
  • An electric detonator may be inserted through the thin paper coverings ofthe terminal pellet booster into the channel thereof.
  • this booster will detonate and initiate the detonation at high velocity of the explosive charge cast around it. and this in turn will initiate the detonation of the nextv booster, the distance between the cartridges separated by the spacing discs being so restricted as vto ensure the detonation being transmitted from cartridge to, cartridge.
  • a columnar blasting explosive package comprising a rigid tube of material subdivisible into lengths by cutting, a plurality of similarly oriented cartridges superposed one on the other and lying within said rigid tube, each of said cartridges comprising a cast detonating explosive adapted to receive at one. end thereof a detonator and each of said cartridges being spaced from each of said other cartridges by an annular disc of felt material, and distinctive markings on the external portion of said tube in positions corresponding to said annular spacing means.
  • a columnar blasting explosive package comprising a rigid tube of,A material subdivisible into lengths by cutting. a plurality of similarly oriented cartridges superposed one on the other and lying within said rigid tube. each of said cartridges comprising a cast detonating explosive adapted to receive at one end thereof a detonator and each of said cartridges being spaced from each of said other cartridges by an annular disc, distinctive markings on the external portion uf said tube in positions corresponding to said annular spacing means, and means for facilitating the junction of the exterior of said rigid tube of said explosive package to another similar package in order to form a longer rigid column.
  • junction means comprises a helical ridge running the length of said rigid tube and an external coupling tube adapted to cooperate with said helical ridge.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)
  • Management, Administration, Business Operations System, And Electronic Commerce (AREA)
US51828A 1947-11-19 1948-09-29 Blasting explosive package Expired - Lifetime US2558163A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB30668/47A GB633528A (en) 1947-11-19 1947-11-19 Improvements in or relating to blasting explosive assemblies

Publications (1)

Publication Number Publication Date
US2558163A true US2558163A (en) 1951-06-26

Family

ID=10311268

Family Applications (1)

Application Number Title Priority Date Filing Date
US51828A Expired - Lifetime US2558163A (en) 1947-11-19 1948-09-29 Blasting explosive package

Country Status (3)

Country Link
US (1) US2558163A (enrdf_load_stackoverflow)
GB (1) GB633528A (enrdf_load_stackoverflow)
NL (2) NL142770B (enrdf_load_stackoverflow)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3407735A (en) * 1965-05-08 1968-10-29 Rheinmetall Gmbh Separately-loaded ammunition
US3791297A (en) * 1971-12-15 1974-02-12 Ca Ind Ltd Explosive package
US4240349A (en) * 1978-09-11 1980-12-23 Lash Charles C Foldable linear explosive charge
US4280407A (en) * 1979-05-21 1981-07-28 C-I-L Inc. Explosive package assembly
US4284006A (en) * 1979-08-13 1981-08-18 Davis Explosive Sources, Inc. Linear explosive charge with constant detonation velocity and synchronous booster charges
US4286520A (en) * 1979-08-13 1981-09-01 Davis Explosive Sources, Inc. Linear explosive charge with constant detonation velocity and synchronous booster charges
US20060196665A1 (en) * 2005-03-01 2006-09-07 Owen Oil Tools Lp Novel device and methods for firing perforating guns
US20080245255A1 (en) * 2007-04-04 2008-10-09 Owen Oil Tools, Lp Modular time delay for actuating wellbore devices and methods for using same
US20100000789A1 (en) * 2005-03-01 2010-01-07 Owen Oil Tools Lp Novel Device And Methods for Firing Perforating Guns
FR2945615A1 (fr) * 2009-05-18 2010-11-19 Nexter Systems Dispositif de separation d'un ensemble de modules de charge propulsive
CN104501662A (zh) * 2014-12-04 2015-04-08 安徽理工大学 一种螺旋聚能型掏槽药柱壳体
US10113845B1 (en) 2014-12-19 2018-10-30 Ultratec Special Effects, Inc. Apparatus for shipping components of an explosive device

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2770312A (en) * 1953-09-11 1956-11-13 Stanolind Oil & Gas Co Seismic wave generation
US2842056A (en) * 1954-05-04 1958-07-08 Seismograph Service Corp Explosive charge

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1406844A (en) * 1921-03-25 1922-02-14 George E Gelm Torpedo for blasting purposes
US1431774A (en) * 1921-01-20 1922-10-10 Bowman Robert Lee Blasting shell or sheet
US1587356A (en) * 1921-10-29 1926-06-01 French Battery Company Battery
US2078298A (en) * 1933-06-08 1937-04-27 Ici Ltd Blasting
US2129508A (en) * 1935-05-23 1938-09-06 Atlas Powder Co Molded explosive
US2353739A (en) * 1940-11-07 1944-07-18 American Can Co Explosive container
US2403488A (en) * 1945-05-01 1946-07-09 Hercules Powder Co Ltd Explosive cartridge assembly
US2429079A (en) * 1943-06-30 1947-10-14 Hercules Powder Co Ltd Connecting means for explosive cartridges
US2448658A (en) * 1946-03-02 1948-09-07 Atlas Powder Co Method for making explosive assemblies

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1431774A (en) * 1921-01-20 1922-10-10 Bowman Robert Lee Blasting shell or sheet
US1406844A (en) * 1921-03-25 1922-02-14 George E Gelm Torpedo for blasting purposes
US1587356A (en) * 1921-10-29 1926-06-01 French Battery Company Battery
US2078298A (en) * 1933-06-08 1937-04-27 Ici Ltd Blasting
US2129508A (en) * 1935-05-23 1938-09-06 Atlas Powder Co Molded explosive
US2353739A (en) * 1940-11-07 1944-07-18 American Can Co Explosive container
US2429079A (en) * 1943-06-30 1947-10-14 Hercules Powder Co Ltd Connecting means for explosive cartridges
US2403488A (en) * 1945-05-01 1946-07-09 Hercules Powder Co Ltd Explosive cartridge assembly
US2448658A (en) * 1946-03-02 1948-09-07 Atlas Powder Co Method for making explosive assemblies

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3407735A (en) * 1965-05-08 1968-10-29 Rheinmetall Gmbh Separately-loaded ammunition
US3791297A (en) * 1971-12-15 1974-02-12 Ca Ind Ltd Explosive package
US4240349A (en) * 1978-09-11 1980-12-23 Lash Charles C Foldable linear explosive charge
US4280407A (en) * 1979-05-21 1981-07-28 C-I-L Inc. Explosive package assembly
US4284006A (en) * 1979-08-13 1981-08-18 Davis Explosive Sources, Inc. Linear explosive charge with constant detonation velocity and synchronous booster charges
US4286520A (en) * 1979-08-13 1981-09-01 Davis Explosive Sources, Inc. Linear explosive charge with constant detonation velocity and synchronous booster charges
US20100000789A1 (en) * 2005-03-01 2010-01-07 Owen Oil Tools Lp Novel Device And Methods for Firing Perforating Guns
US20060196665A1 (en) * 2005-03-01 2006-09-07 Owen Oil Tools Lp Novel device and methods for firing perforating guns
US7913603B2 (en) 2005-03-01 2011-03-29 Owen Oil Tolls LP Device and methods for firing perforating guns
US8079296B2 (en) 2005-03-01 2011-12-20 Owen Oil Tools Lp Device and methods for firing perforating guns
US20080245255A1 (en) * 2007-04-04 2008-10-09 Owen Oil Tools, Lp Modular time delay for actuating wellbore devices and methods for using same
US7721650B2 (en) * 2007-04-04 2010-05-25 Owen Oil Tools Lp Modular time delay for actuating wellbore devices and methods for using same
FR2945615A1 (fr) * 2009-05-18 2010-11-19 Nexter Systems Dispositif de separation d'un ensemble de modules de charge propulsive
EP2253926A1 (fr) * 2009-05-18 2010-11-24 NEXTER Systems Dispositif de séparation d'un ensemble de modules de charge propulsive
CN104501662A (zh) * 2014-12-04 2015-04-08 安徽理工大学 一种螺旋聚能型掏槽药柱壳体
US10113845B1 (en) 2014-12-19 2018-10-30 Ultratec Special Effects, Inc. Apparatus for shipping components of an explosive device

Also Published As

Publication number Publication date
NL142770B (nl)
NL69713C (enrdf_load_stackoverflow)
GB633528A (en) 1949-12-19

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