US3373687A - Wire mounting for an electric fuze of a shaped-charge projectile - Google Patents

Wire mounting for an electric fuze of a shaped-charge projectile Download PDF

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Publication number
US3373687A
US3373687A US446006A US44600665A US3373687A US 3373687 A US3373687 A US 3373687A US 446006 A US446006 A US 446006A US 44600665 A US44600665 A US 44600665A US 3373687 A US3373687 A US 3373687A
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US
United States
Prior art keywords
fuze
shell
wire
outer shell
charge
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
US446006A
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English (en)
Inventor
Simmons Bjorn Herman Olof
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.)
Saab Bofors AB
Original Assignee
Bofors AB
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 Bofors AB filed Critical Bofors AB
Application granted granted Critical
Publication of US3373687A publication Critical patent/US3373687A/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
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C19/00—Details of fuzes
    • F42C19/06—Electric contact parts specially adapted for use with electric fuzes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42B—EXPLOSIVE CHARGES, e.g. FOR BLASTING, FIREWORKS, AMMUNITION
    • F42B12/00—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material
    • F42B12/02—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect
    • F42B12/04—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of armour-piercing type
    • F42B12/10—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect of armour-piercing type with shaped or hollow charge

Definitions

  • Another more specific object of the invention is to provide a novel and improved wire mounting in which the attachment of the wire to the afore referred to contact member o-f the energizing circuit of the ⁇ fuze is such that the wire is fully capable of withstanding the powerful acceleration forces to which it is subjected when the projectile is propelled toward its target.
  • FIG. 1 is a perspective view, partly in section, of an explosive projectile of the shaped or hollow charge type in which is incorporated the wire mounting according to the invention.
  • the exemplied projectile is illustrated as an antitank projectile or missile.
  • the front portion of the projectile comprises a substantially conical outer shell 1 which is mechanically and electrically connected to a rear casing 2, which is lled with a shaped explosive charge 3 of suitable composition.
  • the rear end of casing 2 mounts an electric fuze 4 of conventional design.
  • One terminal of the energizing circuit of this fuze should be visualized as being connected to the outer shell 1 through casing 2.
  • a second terminal of the fuze is connected through a conductor wire 5 to a for-ward contact member 6.
  • This contact member is shown in the form of an inner shell substantially duplicating the conical configuration of the outer shell 1.
  • the circuitry of the fuze is arranged in a conventional manner, so that an energizing circ-uit for the fuze is closed, causing activation thereof, when the outer shell 1 and the inner shell 6 are brought into electric contact with each other, which occurs when the outer shell or both shells are deformed by the impact of the projectile on a target.
  • the jet defines approximately a cone which has at each transverse plane a diameter of approximately 10% of the diameter of the cavity defined by the liner at the respective plane.
  • the purpose of the jet is to strike and pierce the target at the point where the penetrating force is at a maximum.
  • Such function of hollow or shaped-charge projectiles is well known and understood as such, and does not constitute part of the invention.
  • a conductor wire centrically disposed in liner 7 is bound to interfere considerably with the formation of the jet.
  • the penetrating force of the jet may be reduced by about 50%.
  • the wire By arranging wire eccentrically in reference to the center axis of liner 7, that is, eccentrically in reference to the path of the jet, the wire will not appreciably interfere with the formation of the jet, and is also less exposed to the damaging forces of the jet.
  • the wire extends from the fuze through a tube 8 inserted into the charge.
  • the tube may be made of brass or a suitable plastic, but in many instances, a simple bore through the charge is sufficient.
  • a guide disk 9 made, for instance, of insulation material, at the forward end of tube or bore 8 guides the wire which is extended through a hole 6a in the inner contact shell 6.
  • a protective sleeve 10, made, for instance, of plastic, is preferably provided to prevent damage to the wire at the edge of the hole.
  • the portion of the wire protruding between the inner shell 6 and the outer shell 1 is secured to contact shell 6 in strong mechanical and electrical contact therewith. While the wire may be attached by soldering, a rivet 11, such as is shown, has been found to be preferable.
  • a strain relief means 12 is preferably provided between the point of attachment of the wire to contact shell l6 at rivet 11 and the hole 6a through which the wire is extended.
  • the strain relief means may be in the form of a headed pin 12 upon which the wire is wound with several turns.
  • the diameter of the cone formed by the jet occupies about of the diameter of liner 7 at each transverse plane.
  • the eccentric or slanted mounting of the wire assures that the wire will be outside the jet cone for practically its entire length.
  • the wire should be kept as short as possible to reduce its mass as much as possible.
  • the mounting of the wire on inner contact shell 6 is placed as close to the rear end of contact shell 6 as is practical.
  • a small mass of the wire in conjunction with the aforedescribed mounting thereof, and the provision of strain relief means, make the wire capable of withstanding even very high forces of acceleration. It is also essential that the wire be stretched taut so that it offers a minimum basis for attack by the forces of acceleration and that it is safely eccentric for practically its entire length with respect to the path of the jet stream.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Elimination Of Static Electricity (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Air Bags (AREA)
US446006A 1964-04-07 1965-04-06 Wire mounting for an electric fuze of a shaped-charge projectile Expired - Lifetime US3373687A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE426064 1964-04-07

Publications (1)

Publication Number Publication Date
US3373687A true US3373687A (en) 1968-03-19

Family

ID=20263816

Family Applications (1)

Application Number Title Priority Date Filing Date
US446006A Expired - Lifetime US3373687A (en) 1964-04-07 1965-04-06 Wire mounting for an electric fuze of a shaped-charge projectile

Country Status (9)

Country Link
US (1) US3373687A (fi)
AT (1) AT253988B (fi)
BE (1) BE662071A (fi)
CH (1) CH424545A (fi)
DE (1) DE1297515B (fi)
FI (1) FI41630C (fi)
FR (1) FR1429664A (fi)
GB (1) GB1100374A (fi)
NL (1) NL140332B (fi)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3667393A (en) * 1969-07-24 1972-06-06 Forsvarets Fabriksverke Electric fuze for shaped-charge missiles
US4020765A (en) * 1975-11-07 1977-05-03 The United States Of America As Represented By The Secretary Of The Army Light activated fuze
US4111126A (en) * 1969-01-14 1978-09-05 Messerschmitt-Bolkow-Blohm Gesellschaft Mit Beschrankter Haftung Warhead for use against armored targets
US4421030A (en) * 1981-10-15 1983-12-20 The Boeing Company In-line fuze concept for antiarmor tactical warheads
US4831936A (en) * 1985-01-31 1989-05-23 Aktiebolaget Bofors Armor piercing shell
US4913057A (en) * 1987-04-03 1990-04-03 Aktiebolaget Bofors Armor piercing shell
EP0391876A2 (en) * 1989-04-06 1990-10-10 Bofors AB Armour-piercing projectile
US5723811A (en) * 1995-06-13 1998-03-03 Tda Armements Sas Warhead having a core generating charge

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2457946C2 (de) * 1974-12-07 1982-12-02 Rheinmetall GmbH, 4000 Düsseldorf Zündsystem für Geschosse
SE8200194L (sv) * 1982-01-15 1983-07-16 Bofors Ab Laddning
DE3315406C1 (de) * 1983-04-28 1984-06-20 Messerschmitt-Bölkow-Blohm GmbH, 8000 München Elektrische Aufschlagszündung für Gefechtsköpfe

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2485887A (en) * 1944-04-06 1949-10-25 Us Navy Projectile
US2672094A (en) * 1946-09-18 1954-03-16 Claudius H M Roberts Fuze
US2728296A (en) * 1945-02-27 1955-12-27 Leo T Meister Instantaneous detonator for hollow charge projectiles
US2849957A (en) * 1953-01-27 1958-09-02 Bofors Ab Explosive projectile
US2856853A (en) * 1956-10-09 1958-10-21 Richard P Mcginnis Impact switch
US2934019A (en) * 1956-02-02 1960-04-26 Charles R Olsen Fuze assembly

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1054322A (fr) * 1952-01-16 1954-02-09 Projectile à charge creuse pour tubes rayés
BE548003A (fi) * 1955-05-20 1900-01-01

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2485887A (en) * 1944-04-06 1949-10-25 Us Navy Projectile
US2728296A (en) * 1945-02-27 1955-12-27 Leo T Meister Instantaneous detonator for hollow charge projectiles
US2672094A (en) * 1946-09-18 1954-03-16 Claudius H M Roberts Fuze
US2849957A (en) * 1953-01-27 1958-09-02 Bofors Ab Explosive projectile
US2934019A (en) * 1956-02-02 1960-04-26 Charles R Olsen Fuze assembly
US2856853A (en) * 1956-10-09 1958-10-21 Richard P Mcginnis Impact switch

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4111126A (en) * 1969-01-14 1978-09-05 Messerschmitt-Bolkow-Blohm Gesellschaft Mit Beschrankter Haftung Warhead for use against armored targets
US3667393A (en) * 1969-07-24 1972-06-06 Forsvarets Fabriksverke Electric fuze for shaped-charge missiles
US4020765A (en) * 1975-11-07 1977-05-03 The United States Of America As Represented By The Secretary Of The Army Light activated fuze
US4421030A (en) * 1981-10-15 1983-12-20 The Boeing Company In-line fuze concept for antiarmor tactical warheads
US4831936A (en) * 1985-01-31 1989-05-23 Aktiebolaget Bofors Armor piercing shell
US4913057A (en) * 1987-04-03 1990-04-03 Aktiebolaget Bofors Armor piercing shell
EP0391876A2 (en) * 1989-04-06 1990-10-10 Bofors AB Armour-piercing projectile
EP0391876A3 (en) * 1989-04-06 1992-02-26 Bofors AB Armour-piercing projectile
US5723811A (en) * 1995-06-13 1998-03-03 Tda Armements Sas Warhead having a core generating charge

Also Published As

Publication number Publication date
FR1429664A (fr) 1966-02-25
BE662071A (fi) 1965-08-02
CH424545A (de) 1966-11-15
NL6504439A (fi) 1965-10-08
FI41630C (fi) 1969-12-10
GB1100374A (en) 1968-01-24
DE1297515B (de) 1969-06-12
AT253988B (de) 1967-05-10
FI41630B (fi) 1969-09-01
NL140332B (nl) 1973-11-15

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JPS62501441A (ja) 安全化することができる地雷内の装置