US2628559A - Explosive drill - Google Patents

Explosive drill Download PDF

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Publication number
US2628559A
US2628559A US647069A US64706946A US2628559A US 2628559 A US2628559 A US 2628559A US 647069 A US647069 A US 647069A US 64706946 A US64706946 A US 64706946A US 2628559 A US2628559 A US 2628559A
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US
United States
Prior art keywords
charge
casing
explosive
priming
drill
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
US647069A
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English (en)
Inventor
Jasse Raymond
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.)
CT D ETUDES M B A SOC
DITE CENTRE D'ETUDES M B A Ste
Original Assignee
CT D ETUDES M B A SOC
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 CT D ETUDES M B A SOC filed Critical CT D ETUDES M B A SOC
Application granted granted Critical
Publication of US2628559A publication Critical patent/US2628559A/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
    • 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
    • F42B3/08—Blasting cartridges, i.e. case and explosive with cavities in the charge, e.g. hollow-charge blasting cartridges

Definitions

  • This invention has for its objectan explosive drill or perforator. which is of general use for boring operations, demolitions, destructions and parcelling operations and is more particularly intended for usein boring a deep hole in a predetermined direction in any natural or artificial obstacle.
  • theimproved perforator comprises a casing having a longitudinal. axis of symmetry, made of a light material such as cardboard or. sheet metal, and housing from rear to front at. least. one
  • a fixation device secured to saidfront end in order tomaintain a predetermedspacingbetween the fore plane of said cavity and the surface of the obstacle to be bored.
  • Fig. 1 is a longitudinal section of the device
  • Fig. 2 is a similar view of a modified construction.
  • Figs. 3 and 4 Show diagrammatically other arrangements of the charges.
  • the drillor perforator comprises a cylindrical, container or casing l of cardboard or metal closed at its rear endbya woodenlplugl securedin the container by meansofscrews 3.
  • the frontor inner surface of. saidrplug which isa surfaceofrevolutioncoaxial with the casing comprises a central spherical part ,4 and a flaring conical part 5.
  • a blasting charge H1 is placed in front of said priming charge, the front surface of the same being a sphero-conical flaring surface coaxial with the casing and having a shape similar to thefront faceof the plug.
  • the thickness of the composite charge in a direction parallel to the axis ofthe-casing is substantially uniform at all points of its cross section.
  • the container I carries at its front end a tubular extension open at both ends which is provided at its front endwith attaching means such as a bracket .12 by means, of which it may be readily secured to the obstacle l3 to be bored, as for instance by a nail M.
  • the casing When. a. perforating operation is to be made.
  • the casing is fixed to the obstacle so that its axis coincides with the direction of the bore to be drilled and a combineddetonator and fuze I5 is inserted through a hole provided axially in the rear end of plug 2 so as to contact with the priming or firing charge I. The shot is then fired.
  • the initial impulsion imparted by the detona tor fuze' I5 is transmitted from the rear tothe front first to the priming charge I and then to the explosivecharge Ill.
  • the detonation is propagated frontwards by a decomposition of the main charge in successive layers having a shape correspondingsubstantially to the shape initially given to the rear part of said charge.
  • the explosive waves are directed and concentrated towards a point located ahead somewhere on the axis of the casing, i. e. on the axis of perforation.
  • a maximum concentration of the explosive waves is obtained in the desired direction with a minimum weight of explosive material.
  • the device has thus a high eliciency.
  • Thecasing being made of a light material can be easily manufactured atreduced costs.
  • the device is not heavy and can beeasily manipulated and it ensures a very small projection of inoffensivesplinters.
  • the length of the tubular extension II is so calculated that when the device is in firing position the front face of the. whole pyrotechnical body will be located ata distance'from the obstacle corresponding to the maximum. efficiency. Said distance, which varies according to the shape of the charges and the material constituting the obstacle is in all cases less than 1.5 the diameter of the charge.
  • the front faces of the plug, priming charge and blasting charge may havethe shape of other surfaces of revolution of a conoidalcharacter suohasa paraboloid, an ellipsoid, etc; as showntin Fig. 2.
  • blastingcharge has sucha shapethat the priming charge will partly envelop the blasting charge.
  • the device is completed by a funnel shaped hollow member 18 I (Fig. 2) having removably and telescopically engaged in the free end of the casing I.
  • a short hole [9 having a small diameter is drilled in the face of the obstacle or structure to be bored.
  • the reduced end or nozzle of said funnel member 18 is introduced into said hole. The device is thus given at once a correct position in which it is properly secured on'the obstacle or structure to be drilled.
  • the construction may be so devised that for storing and handling purposes the funnel will be placed inside the casin extension in an inverted position, as shown in dotted lines in the lower part of Fig. 2.
  • the bulk'of the whole device is thus reduced and the funnel acts as a protective covering for the front end of the same.
  • the plug 2 may be composed of separate pieces of wood or cardboard or by a body of an inert material such as earth or kieselguh'r, which will not become agglomerated or solidified under physical or chemical actions (shocks, heat, etc.)
  • Said body is held at the rear'end of the casing by an end wall 29, as shown in Fig. 2.
  • the casing is madeof sheet metal.
  • Fig. 3 shows another modification in which a plurality of priming charges is provided."
  • the blasting charge 20 is partly enveloped by a priming charge 21 which is' itself partly enveloped by a priming charge 22 at the topof which is provided a recess 23 for housing the detonator fuse.
  • the shape of the charges is of the type described with reference to Fig. 2'.
  • the solid angle at the apex of each charge gradually increases from one charge to the next, from the rear end to the front end of the device.
  • materials constituting the various charges are chosen of different grades or are compressed diiferently one from another so that the detonation speed in the charges will progressively decrease from the rear end to the front end of the device.
  • the concentration of the detonation waves along the axis of the device will progressively increase from the first priming charge 22 which is fired directly by the detonator fuse to the second priming charge 2
  • Fig. 4 shows a further modification in which recesses 25, 2t, 21 are formed in the outer face of the second priming charge 21, which may be considered as an intermediary priming charge or an orientation charge.
  • Said recesses are so arranged that their axial lines such as a, b, 0 will converge to a point :1 located on the axial lineof the casing, whichds also the axis of the;reces s, or cavity formed by the outer face 1 of the blast- Moreover the explosive ing charge.
  • Said recesses could be bodies of revolution and have an annular or toroidal shape.
  • the whole of the priming and blasting charges can be wrapped in a light envelope made of paper, cardboard or metal, according to the shape and nature of the constituents of the charges, so that they may be introduced more easily into the casing.
  • an explosive drill having an outer casing having .afbase portion closing one end thereof whilst the other end is open and free and a drill I hollow charge in said casing adjacent said base portion, means for securing said drill to the structure to be drilled comprising a sleeve engaging the free open end of the casing, a substantially funnel-shaped member attached to the outer end of said sleeve, said member terminating in a tube adapted to enter a hole of small diameter in the structure tosupport the drill on the structure.
  • means for securing said drill to the structure to be drilled comprising a sleeve, engaging the free open end of the casing, a conical member secured to the free end of the sleeve and an elongated tube secured to the reduced end of the conical member, the tube being adapted for insertion into a hole of small diameter provided in the structure to b drilled to secure said drill in the structure.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Ink Jet (AREA)
  • Toys (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)
US647069A 1945-02-06 1946-02-12 Explosive drill Expired - Lifetime US2628559A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR610106X 1945-02-06

Publications (1)

Publication Number Publication Date
US2628559A true US2628559A (en) 1953-02-17

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US647069A Expired - Lifetime US2628559A (en) 1945-02-06 1946-02-12 Explosive drill

Country Status (4)

Country Link
US (1) US2628559A (is")
BE (1) BE462859A (is")
FR (2) FR54890E (is")
GB (1) GB610106A (is")

Cited By (38)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2782715A (en) * 1951-10-05 1957-02-26 Borg Warner Well perforator
US2856750A (en) * 1955-06-02 1958-10-21 American Viscose Corp Vinyl resin impregnated rayon cordage
US2892407A (en) * 1952-01-28 1959-06-30 Norman A Macleod Shaped cavity explosive charge
US2908222A (en) * 1953-05-25 1959-10-13 Borg Warner Apparatus for detonating shaped explosive charges
US2926603A (en) * 1957-12-18 1960-03-01 Borg Warner Well perforator shaped charge
US2937157A (en) * 1956-11-07 1960-05-17 Dow Chemical Co Haloethylene polymers containing allyl ethers of 2-hydroxy benzophenones
US2972948A (en) * 1952-09-16 1961-02-28 Raymond H Kray Shaped charge projectile
US2972949A (en) * 1956-01-18 1961-02-28 Norman A Macleod Anti-personnel fragmentation weapon
US2980018A (en) * 1956-01-03 1961-04-18 Borg Warner Well perforator shaped charge
US2999458A (en) * 1958-07-01 1961-09-12 Du Pont Surface wave generator
US3016831A (en) * 1958-10-02 1962-01-16 Du Pont Surface wave generator
US3100445A (en) * 1959-01-14 1963-08-13 Borg Warner Shaped charge and method of firing the same
US3103882A (en) * 1949-01-15 1963-09-17 William L Gilliland Explosive cartridges and explosives
US3135205A (en) * 1959-03-03 1964-06-02 Hycon Mfg Company Coruscative ballistic device
US3154014A (en) * 1961-10-27 1964-10-27 Gen Dynamics Corp Method of and apparatus for accelerating gases and solids
US3186304A (en) * 1962-10-22 1965-06-01 Mb Assoc Hypervelocity gun
US3188955A (en) * 1961-03-31 1965-06-15 Western Co Of North America Explosive charge assemblies
US3191533A (en) * 1963-01-23 1965-06-29 Jet Res Ct Inc Gas discharge apparatus
US3218199A (en) * 1963-08-14 1965-11-16 Du Pont Process for hardening metals using explosive means
DE1210747B (de) * 1962-05-29 1966-02-10 Montage Technik Anstalt F Verfahren und Vorrichtung zur Herstellung von Loechern im Erdboden
US3275098A (en) * 1960-12-27 1966-09-27 William S Filler Method and apparatus for generating seismic waves
US3280743A (en) * 1963-05-10 1966-10-25 Hubert G Reuther Directional control of explosive energy
US3347164A (en) * 1965-05-18 1967-10-17 Schlumberger Prospection Multiple perforation shaped charge
US3410212A (en) * 1953-05-07 1968-11-12 Army Usa Anti-tank mine with binary explosive charge
US3439611A (en) * 1967-09-13 1969-04-22 Du Pont Explosive primer
US3561361A (en) * 1950-04-18 1971-02-09 Us Army Detonation system for shaped charges
US3611932A (en) * 1969-07-03 1971-10-12 Us Navy Shaped wave generator
US3906857A (en) * 1953-05-22 1975-09-23 Jr Salvatore Joseph Rotondi Anti-tank mine
DE2706060A1 (de) * 1977-02-12 1978-08-17 Rheinmetall Gmbh Verfahren zum lenken der detonationswelle im sprengstoff von ladungen vorgebbarer wirkrichtung, insbesondere hohlladungen, und massnahme zum durchfuehren des verfahrens
US4109576A (en) * 1975-06-18 1978-08-29 Eckels Robert E Shaped charge with enhanced penetration
DE2807258C1 (de) * 1978-02-21 1983-05-05 Messerschmitt-Bölkow-Blohm GmbH, 8000 München Zuendsystem zum Initiieren von Sprengladungen
WO1989009376A1 (en) * 1988-03-24 1989-10-05 The University Of Manchester Institute Of Science Explosive cutting device with waveguide
US5271332A (en) * 1992-10-02 1993-12-21 The United States Of America As Represented By The Secretary Of The Navy Modified channel effect for solid explosive detonation waves
US6739265B1 (en) 1995-08-31 2004-05-25 The Ensign-Bickford Company Explosive device with assembled segments and related methods
KR101190654B1 (ko) 2010-03-11 2012-10-15 국방과학연구소 모의 손상 성형작약탄의 제조방법
US20160169639A1 (en) * 2014-12-12 2016-06-16 Schlumberger Technology Corporation Composite Shaped Charges
US10365073B1 (en) * 2017-09-29 2019-07-30 The United States Of America As Represented By The Secretary Of The Navy Extraction charge for underground threats
US11415397B2 (en) * 2018-01-05 2022-08-16 Halliburton Energy Services, Inc. Additive manufacturing of energetic materials in oil well shaped charges

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2750885A (en) * 1949-01-22 1956-06-19 Borg Warner Aligning means for shaped charge perforating apparatus
US2707917A (en) * 1949-07-25 1955-05-10 Lane Wells Co Well casing perforator
US2809585A (en) * 1949-11-16 1957-10-15 Sidney A Moses Projectile for shaped charges
US2757611A (en) * 1950-04-11 1956-08-07 Joseph H Church Shaped charges
US3292536A (en) * 1950-04-25 1966-12-20 Joseph H Church Shaped explosive charges
US2719458A (en) * 1950-05-31 1955-10-04 Albert M Stott Electrically fired percussion primer
US2947250A (en) * 1951-09-24 1960-08-02 Welex Inc Shaped charge assembly and gun
US2900905A (en) * 1951-10-15 1959-08-25 Duncan P Macdougall Projectile cavity charges
DE1142536B (de) * 1952-08-12 1963-01-17 Charlotte Vogt Geb Petersen Rotationssymmetrische Hohlsprengladung
GB2354309B (en) * 1978-05-22 2001-07-04 Hunting Eng Ltd Explosive devices
FR2488389B1 (fr) * 1980-08-06 1986-04-25 Serat Perfectionnements aux charges creuses
FR2672380B1 (fr) * 1983-08-18 1993-12-31 Commissariat A Energie Atomique Charge formee a hautes performances.
GB2227298B (en) * 1984-08-28 1991-02-13 Fraunhofer Ges Forschung A device for producing explosively shaped projectiles

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US356064A (en) * 1887-01-11 Blasting-cap
GB191120110A (en) * 1911-09-11 1912-01-11 Wallace Fairweather Improvements in and relating to Explosive Mines.
US1029051A (en) * 1910-08-25 1912-06-11 Frank Dutcher Parade-torch.
GB191128030A (en) * 1910-12-14 1912-10-10 Westf Anhaltische Sprengstoff Improvement in Explosive Charges or Bodies.
US1088606A (en) * 1913-09-22 1914-02-24 Catharine M Mcginley Mosquito-torch.
US1406844A (en) * 1921-03-25 1922-02-14 George E Gelm Torpedo for blasting purposes
US1440601A (en) * 1921-01-06 1923-01-02 John R Holran Explosive charge
US1531555A (en) * 1924-07-31 1925-03-31 Joseph W Harris Art of perforating and severing metals
US1534012A (en) * 1923-08-27 1925-04-14 Charles P Watson Percussion fuse
US1534011A (en) * 1921-09-22 1925-04-14 Charles P Watson Percussion fuse
US2247169A (en) * 1937-12-11 1941-06-24 Heitzman Safety Blasting Plug Blasting shell for surface blasting
US2407093A (en) * 1942-05-21 1946-09-03 Gestion Et D Expl De Brevets S Method and apparatus for cutting or punching sheet material
US2419414A (en) * 1941-10-03 1947-04-22 Sageb Sa Projectile
US2420201A (en) * 1942-03-07 1947-05-06 Olin Ind Inc Blasting cap

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US356064A (en) * 1887-01-11 Blasting-cap
US1029051A (en) * 1910-08-25 1912-06-11 Frank Dutcher Parade-torch.
GB191128030A (en) * 1910-12-14 1912-10-10 Westf Anhaltische Sprengstoff Improvement in Explosive Charges or Bodies.
GB191120110A (en) * 1911-09-11 1912-01-11 Wallace Fairweather Improvements in and relating to Explosive Mines.
US1088606A (en) * 1913-09-22 1914-02-24 Catharine M Mcginley Mosquito-torch.
US1440601A (en) * 1921-01-06 1923-01-02 John R Holran Explosive charge
US1406844A (en) * 1921-03-25 1922-02-14 George E Gelm Torpedo for blasting purposes
US1534011A (en) * 1921-09-22 1925-04-14 Charles P Watson Percussion fuse
US1534012A (en) * 1923-08-27 1925-04-14 Charles P Watson Percussion fuse
US1531555A (en) * 1924-07-31 1925-03-31 Joseph W Harris Art of perforating and severing metals
US2247169A (en) * 1937-12-11 1941-06-24 Heitzman Safety Blasting Plug Blasting shell for surface blasting
US2419414A (en) * 1941-10-03 1947-04-22 Sageb Sa Projectile
US2420201A (en) * 1942-03-07 1947-05-06 Olin Ind Inc Blasting cap
US2407093A (en) * 1942-05-21 1946-09-03 Gestion Et D Expl De Brevets S Method and apparatus for cutting or punching sheet material

Cited By (41)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3103882A (en) * 1949-01-15 1963-09-17 William L Gilliland Explosive cartridges and explosives
US3561361A (en) * 1950-04-18 1971-02-09 Us Army Detonation system for shaped charges
US2782715A (en) * 1951-10-05 1957-02-26 Borg Warner Well perforator
US2892407A (en) * 1952-01-28 1959-06-30 Norman A Macleod Shaped cavity explosive charge
US2972948A (en) * 1952-09-16 1961-02-28 Raymond H Kray Shaped charge projectile
US3410212A (en) * 1953-05-07 1968-11-12 Army Usa Anti-tank mine with binary explosive charge
US3906857A (en) * 1953-05-22 1975-09-23 Jr Salvatore Joseph Rotondi Anti-tank mine
US2908222A (en) * 1953-05-25 1959-10-13 Borg Warner Apparatus for detonating shaped explosive charges
US2856750A (en) * 1955-06-02 1958-10-21 American Viscose Corp Vinyl resin impregnated rayon cordage
US2980018A (en) * 1956-01-03 1961-04-18 Borg Warner Well perforator shaped charge
US2972949A (en) * 1956-01-18 1961-02-28 Norman A Macleod Anti-personnel fragmentation weapon
US2937157A (en) * 1956-11-07 1960-05-17 Dow Chemical Co Haloethylene polymers containing allyl ethers of 2-hydroxy benzophenones
US2926603A (en) * 1957-12-18 1960-03-01 Borg Warner Well perforator shaped charge
US2999458A (en) * 1958-07-01 1961-09-12 Du Pont Surface wave generator
US3016831A (en) * 1958-10-02 1962-01-16 Du Pont Surface wave generator
US3100445A (en) * 1959-01-14 1963-08-13 Borg Warner Shaped charge and method of firing the same
US3135205A (en) * 1959-03-03 1964-06-02 Hycon Mfg Company Coruscative ballistic device
US3275098A (en) * 1960-12-27 1966-09-27 William S Filler Method and apparatus for generating seismic waves
US3188955A (en) * 1961-03-31 1965-06-15 Western Co Of North America Explosive charge assemblies
US3154014A (en) * 1961-10-27 1964-10-27 Gen Dynamics Corp Method of and apparatus for accelerating gases and solids
DE1210747B (de) * 1962-05-29 1966-02-10 Montage Technik Anstalt F Verfahren und Vorrichtung zur Herstellung von Loechern im Erdboden
US3186304A (en) * 1962-10-22 1965-06-01 Mb Assoc Hypervelocity gun
US3191533A (en) * 1963-01-23 1965-06-29 Jet Res Ct Inc Gas discharge apparatus
US3280743A (en) * 1963-05-10 1966-10-25 Hubert G Reuther Directional control of explosive energy
US3218199A (en) * 1963-08-14 1965-11-16 Du Pont Process for hardening metals using explosive means
US3347164A (en) * 1965-05-18 1967-10-17 Schlumberger Prospection Multiple perforation shaped charge
US3439611A (en) * 1967-09-13 1969-04-22 Du Pont Explosive primer
US3611932A (en) * 1969-07-03 1971-10-12 Us Navy Shaped wave generator
US4109576A (en) * 1975-06-18 1978-08-29 Eckels Robert E Shaped charge with enhanced penetration
DE2706060A1 (de) * 1977-02-12 1978-08-17 Rheinmetall Gmbh Verfahren zum lenken der detonationswelle im sprengstoff von ladungen vorgebbarer wirkrichtung, insbesondere hohlladungen, und massnahme zum durchfuehren des verfahrens
FR2380530A1 (fr) * 1977-02-12 1978-09-08 Rheinmetall Gmbh Procede pour diriger l'onde de detonation dans la matiere explosive des charges a direction d'action predeterminee, en particulier des charges creuses, et disposition pour la mise en oeuvre du procede
US4291624A (en) * 1977-02-12 1981-09-29 Rheinmetall Gmbh Explosive charges
DE2807258C1 (de) * 1978-02-21 1983-05-05 Messerschmitt-Bölkow-Blohm GmbH, 8000 München Zuendsystem zum Initiieren von Sprengladungen
WO1989009376A1 (en) * 1988-03-24 1989-10-05 The University Of Manchester Institute Of Science Explosive cutting device with waveguide
US5271332A (en) * 1992-10-02 1993-12-21 The United States Of America As Represented By The Secretary Of The Navy Modified channel effect for solid explosive detonation waves
US6739265B1 (en) 1995-08-31 2004-05-25 The Ensign-Bickford Company Explosive device with assembled segments and related methods
KR101190654B1 (ko) 2010-03-11 2012-10-15 국방과학연구소 모의 손상 성형작약탄의 제조방법
US20160169639A1 (en) * 2014-12-12 2016-06-16 Schlumberger Technology Corporation Composite Shaped Charges
US9612095B2 (en) * 2014-12-12 2017-04-04 Schlumberger Technology Corporation Composite shaped charges
US10365073B1 (en) * 2017-09-29 2019-07-30 The United States Of America As Represented By The Secretary Of The Navy Extraction charge for underground threats
US11415397B2 (en) * 2018-01-05 2022-08-16 Halliburton Energy Services, Inc. Additive manufacturing of energetic materials in oil well shaped charges

Also Published As

Publication number Publication date
FR965547A (is") 1950-09-15
FR54890E (fr) 1950-12-07
BE462859A (is")
GB610106A (en) 1948-10-12

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