US3252418A - Magnetic mine - Google Patents

Magnetic mine Download PDF

Info

Publication number
US3252418A
US3252418A US381955A US38195564A US3252418A US 3252418 A US3252418 A US 3252418A US 381955 A US381955 A US 381955A US 38195564 A US38195564 A US 38195564A US 3252418 A US3252418 A US 3252418A
Authority
US
United States
Prior art keywords
coil
charge
mine
wire
lead
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
US381955A
Other languages
English (en)
Inventor
Terrioux Jean-Pierre
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.)
C R I F SA
Crif SA
Original Assignee
C R I F SA
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 C R I F SA filed Critical C R I F SA
Application granted granted Critical
Publication of US3252418A publication Critical patent/US3252418A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C13/00—Proximity fuzes; Fuzes for remote detonation
    • F42C13/08—Proximity fuzes; Fuzes for remote detonation operated by variations in magnetic field
    • 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
    • F42B1/028—Shaped or hollow charges characterised by the form of the liner
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B23/00—Land mines ; Land torpedoes
    • F42B23/04—Land mines ; Land torpedoes anti-vehicle, e.g. anti-aircraft or anti tank
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C11/00—Electric fuzes
    • F42C11/001—Electric circuits for fuzes characterised by the ammunition class or type
    • F42C11/007—Electric circuits for fuzes characterised by the ammunition class or type for land mines

Definitions

  • JEANPIERRE TERRIOUX MAGNETIC MINE Filed July 13, 1964 May 24, 1966 Inven+or JEAN- PIERRE' TERR BY KOULULBAQ Mi'omevs United States Patent 3,252,418 MAGNETIC MINE Jean-Pierre Terrioux, Montelimar, France, assignor to Societe anouyme dite: C.R.I.F. (Centre de mecanics Industrielles et de Fabrications) Filed July 13, 1964, Ser. No. 381,955 c Claims priority, application France, July 22, 1963, 942,237; June 22, 1964, 979,179 Claims. (Cl; 102-19.2)
  • the present invention consists essentially in eliminating the shaped charge liner as such from these mines and substituting for it the coil which serves as the fuse for detonating the charge.
  • This coil or coils serves both its normal electrical purpose and that of a projectile, as soon as the mine has been detonated.
  • Another object of this invention is to provide a new method of manufacturing the coil of such a mine, essentially characterized by the fact that the copper wire from which the coil is formed is covered with a lead coating, for example by passing it through a bath of molten lead, after a light timing to facilitate its adherence.
  • the lead is then superficially oxidized, for example by heating in an oxidizing atmosphere, and the wire which has been treated in this manner is then insulated by applying to it a coating of a thermoplastic varnish.
  • the Wire is then coiled up to form the desired dish, but thicker than its final thickness.
  • the coil is finally heated to plasticiz/e the insulating coating and compressed to the desired thickness.
  • reference numeral 1 designates the casing of the improved mine according to the present invention, which casing houses a detonator 2 connected to a fuse 3 which functions magnetically in a conventional manner, for example upon the approach of an armored vehicle.
  • the coil 5 which is required to explode the mine, replaces the shaped charge liner and for this purpose is mounted in the upper part of the casing 1 above the conventional charge 4.
  • the end wires 5a-5b pass through the central portion of the charge 4 and end at the terminals 6 of the fuse 3.
  • the coil 5, whether single or multiple, may be of tightly coiled wire, kept rigid by impregnation or some other process.
  • This wire is preferably made of copper since that metal imparts to the plate the density and melting point which are necessary if the mine is to function properly.
  • the coil must have the customary shape of a circular dish bounded on its convex and concave faces by conical surfaces, and that in order to serve its electrical purpose the coil must be made of a relatively large number of turns of electrical wire having a diameter of about .15 mm., for example.
  • the layer of lead is then superficially oxidized by. heating the wire in an oxidizing atmosphere, either continuously or in coils.
  • the oxidized wire is then insulated by covering it with a coating of thermoplastic varnish.
  • the resulting wire is coiled into the desired shape, but slightly thicker than the intended end product. This coil is then heated to the necessary temperature, so as to partially fuse the thermoplastic varnish and com pressed between a punch and die having the shape of the desired end product until it is reduced to the desired thickness.
  • the lead layer is caused by the tinning to adhere well to the copper and the thermoplastic layer is caused to adhere well to the lead because it is gripped in the superficial oxide layer.
  • any openings which may have been formed during the fusing of the coil are eliminated and the individual turns are brought closer together so that they are stuck tight to each other by the layer of thermoplastic varnish which fills the interstices between the turns of the coil and enlarges the adhesive surface.
  • This adhesion is moreover improved by the cohesion between the various layers making up the wire.
  • the result is a rigid shaped charge liner, which is solid and substantially free from holes.
  • this shaped charge liner has a much higher density than when it is made by simply coiling up an ordinary copper wire in the presence of lead.
  • This increase in density is important in enabling the shaped charge liner to carry out the ballistic function which it serves in addition to acting as part of the casing for the charge.
  • the layer of lead oxide which surrounds each wire and which remains unaffected by the fusion of the thermoplastic varnish has an insulating power suificiently substantial to supplement that of the varnish and help prevent short circuits between the turns of the coil.
  • the casing for the shaped charge made in this manner comprises on the one hand copper wire which serves primarily to conduct current, but makes a substantial contribution to the weight of the casing for ballistic purposes.
  • the tin serves to improve the adherence of the layer of lead which serves primarily to increase the weight of the ballistic charge, but also conducts a little electric current.
  • the layer of lead oxide which has a ballistic function due to its density, a mechanical function in that it improves the adherence of the layer of varnish, and an electrical function in that it provides insulation between the individual turns of the coil.
  • the layer of thermoplastic varnish serves to stick the assembly together as well as to provide insulation between the coils.
  • the shaped charge mine according to the invention has the customary characteristics of such mines, but an improved performance.
  • a magnetically detonated explosive mine of the type comprising a charge, a detonator, and means comprising an electrical coil for firing said detonator, the turns of said coil being formed into a solid shaped charge liner having a central depression and constituting part of a casing enclosing said charge.
  • a magnetically detonated explosive mine of the type comprising a charge, a detonator, and means comprising an electrical coil for firing said detonator, said coil comprising Wire covered by a coating of thermoplastic insulating material fused to form with said wire a solid shaped charge liner having a central depression and constituting part of a casing enclosing said charge.
  • a mine as claimed in claim 2 in which said wire is covered with successive coatings of tin, lead, and thermoplastic insulating material.
  • a magnetically detonated explosive mine of the type comprising a charge, a detonator, and means comprising an electrical coil for firing said deton ator, said charge being formed with a depression in one side thereof, while said coil fits into said depression and forms part of a casing enclosing said charge.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Insulating Of Coils (AREA)
  • Hard Magnetic Materials (AREA)
  • Insulated Conductors (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
US381955A 1963-07-22 1964-07-13 Magnetic mine Expired - Lifetime US3252418A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR942237A FR1534655A (fr) 1963-07-22 1963-07-22 Perfectionnement aux mines dites à charge formée à mise à feu magnétique
FR979179A FR93052E (fr) 1963-07-22 1964-06-22 Perfectionnement aux mines charge formée, a mise a feu magnétique.

Publications (1)

Publication Number Publication Date
US3252418A true US3252418A (en) 1966-05-24

Family

ID=26202509

Family Applications (1)

Application Number Title Priority Date Filing Date
US381955A Expired - Lifetime US3252418A (en) 1963-07-22 1964-07-13 Magnetic mine

Country Status (10)

Country Link
US (1) US3252418A (enrdf_load_stackoverflow)
BE (1) BE650544A (enrdf_load_stackoverflow)
CH (1) CH412641A (enrdf_load_stackoverflow)
DE (1) DE1226910B (enrdf_load_stackoverflow)
FR (2) FR1534655A (enrdf_load_stackoverflow)
GB (1) GB1077582A (enrdf_load_stackoverflow)
IS (1) IS723B6 (enrdf_load_stackoverflow)
LU (1) LU46503A1 (enrdf_load_stackoverflow)
NL (1) NL6408393A (enrdf_load_stackoverflow)
SE (1) SE301442B (enrdf_load_stackoverflow)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3777663A (en) * 1972-06-22 1973-12-11 Jet Research Center Shaped charge enclosure apparatus
US3875862A (en) * 1972-02-18 1975-04-08 Dynamit Nobel Ag Hollow charge mines for multiple deployment
US4080898A (en) * 1976-02-05 1978-03-28 Gieske Harry A Spiral wrapped shaped charge liners and munition utilizing same
DE3112387A1 (de) * 1981-03-28 1985-12-19 Messerschmitt-Bölkow-Blohm GmbH, 8012 Ottobrunn Hohlladungsmine zur panzerabwehr
EP0235115A1 (de) * 1986-01-28 1987-09-02 Intertechnik Techn. Produktionen- Gesellschaft m.b.H. Annäherungsschalter zum Zünden einer Hohlladung, insbesondere für eine Mine
US4809613A (en) * 1986-10-17 1989-03-07 Diehl Gmbh & Co. Casing for an explosive charge
US4982662A (en) * 1987-08-21 1991-01-08 Imperial Chemical Industries Plc Shaped primer
RU2743918C1 (ru) * 2020-04-30 2021-03-01 Федеральное Государственное Бюджетное Образовательное Учреждение Высшего Образования «Новосибирский Государственный Технический Университет» Кумулятивный заряд (варианты)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH639479A5 (fr) * 1980-11-17 1983-11-15 Perret Jean Detecteur inductif de proximite et son utilisation.
PL446620A1 (pl) * 2023-10-31 2025-05-05 Wojskowy Instytut Techniki Inżynieryjnej Im. Profesora Józefa Kosackiego Zapalnik magnetyczny

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3001476A (en) * 1945-06-04 1961-09-26 John R Boykin Magnetic fuze

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3001476A (en) * 1945-06-04 1961-09-26 John R Boykin Magnetic fuze

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3875862A (en) * 1972-02-18 1975-04-08 Dynamit Nobel Ag Hollow charge mines for multiple deployment
US3777663A (en) * 1972-06-22 1973-12-11 Jet Research Center Shaped charge enclosure apparatus
US4080898A (en) * 1976-02-05 1978-03-28 Gieske Harry A Spiral wrapped shaped charge liners and munition utilizing same
DE3112387A1 (de) * 1981-03-28 1985-12-19 Messerschmitt-Bölkow-Blohm GmbH, 8012 Ottobrunn Hohlladungsmine zur panzerabwehr
EP0235115A1 (de) * 1986-01-28 1987-09-02 Intertechnik Techn. Produktionen- Gesellschaft m.b.H. Annäherungsschalter zum Zünden einer Hohlladung, insbesondere für eine Mine
US4809613A (en) * 1986-10-17 1989-03-07 Diehl Gmbh & Co. Casing for an explosive charge
US4982662A (en) * 1987-08-21 1991-01-08 Imperial Chemical Industries Plc Shaped primer
RU2743918C1 (ru) * 2020-04-30 2021-03-01 Федеральное Государственное Бюджетное Образовательное Учреждение Высшего Образования «Новосибирский Государственный Технический Университет» Кумулятивный заряд (варианты)

Also Published As

Publication number Publication date
IS1397A7 (is) 1965-01-23
NL6408393A (enrdf_load_stackoverflow) 1965-01-25
BE650544A (enrdf_load_stackoverflow) 1964-11-03
LU46503A1 (enrdf_load_stackoverflow) 1964-09-10
FR93052E (fr) 1969-02-07
DE1226910B (de) 1966-10-13
FR1534655A (fr) 1968-08-02
IS723B6 (is) 1970-09-28
SE301442B (enrdf_load_stackoverflow) 1968-06-04
GB1077582A (en) 1967-08-02
CH412641A (fr) 1966-04-30

Similar Documents

Publication Publication Date Title
US3252418A (en) Magnetic mine
US2725821A (en) Circuit closing means and blasting assembly
US5036768A (en) Attenuator for dissipating electromagnetic and electrostatic energy
GB1598002A (en) Electric igniter
JP2004506867A (ja) 線形点火装置
US3332350A (en) Electric blasting cap having heatshrinkable plastic-covered match assembly
US3906858A (en) Miniature igniter
US4335653A (en) Electric igniter with conductive bodies and thin connector
US3686934A (en) Microdetonator assembly
US2086548A (en) Electric initiator
SE442674B (sv) Anordning vid inbyggnad av eltenddon
GB747935A (en) Improvements in or relating to static resistant electric initiator
US2920569A (en) Electrical pellet primer
US2974590A (en) Static resistant electric initiator
US3311055A (en) Toroidal booster with cylindrically symmetrical output
US1832052A (en) Electric mine firing device
US2481696A (en) Electric firing device
CN114688927A (zh) 适应于井下煤矿许用型电子雷管、起爆系统及起爆方法
GB681481A (en) Improvements in or relating to electric detonators and electric blasting assemblies
US2086527A (en) Electric blasting initiator
US3056350A (en) Electric igniter
US2086532A (en) Electric blasting initiator
GB2033553A (en) Electric priming devices
KR100425623B1 (ko) 신관의 기폭 장치 및 그것의 제조 방법
US2963971A (en) Initiator assembly