US2737888A - Projectile equipped with a safety device - Google Patents

Projectile equipped with a safety device Download PDF

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Publication number
US2737888A
US2737888A US331657A US33165753A US2737888A US 2737888 A US2737888 A US 2737888A US 331657 A US331657 A US 331657A US 33165753 A US33165753 A US 33165753A US 2737888 A US2737888 A US 2737888A
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US
United States
Prior art keywords
detonator
projectile
safety device
charge
fire
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
US331657A
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English (en)
Inventor
Brandt Edgar William
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.)
Anstalt Fuer die Entwicklung von Erfindungen und Gewerblichen Anwendungen ENERGA
Original Assignee
Anstalt Fuer die Entwicklung von Erfindungen und Gewerblichen Anwendungen ENERGA
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Publication of US2737888A publication Critical patent/US2737888A/en
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
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C15/00—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges
    • F42C15/24—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein the safety or arming action is effected by inertia means
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C15/00—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges
    • F42C15/24—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein the safety or arming action is effected by inertia means
    • F42C15/26—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein the safety or arming action is effected by inertia means using centrifugal force
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42—AMMUNITION; BLASTING
    • F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C15/00—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges
    • F42C15/34—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein the safety or arming action is effected by a blocking-member in the pyrotechnic or explosive train between primer and main charge

Definitions

  • This invention relates to means adapted to ensure perfect safety in artillery projectiles, and more particularly in hollow-charge projectiles, both during transport and handling and, when fired, over a certain distance forward of the muzzle of the weapon;
  • the invention relates to a projectile of the type comprising inside a casing, a hollow explosive charge the cavity of which is covered with a metal cap open at its apex, and means of transmitting fire through said cap from a front fuze to a rear detonator.
  • the projectile of the present invention is characterized in that, before the firing of the shot, the detonator is housed in the inoperative position inside a safety cage contiguous to the charge carrier base of the projectile and is adapted, after the firing of the shot, to take up its operative position in the explosive charge at the rear of the apex of the cap.
  • the housing of the detonator in the safety position in a cage separate from the part of the projectile containing the charge offers full safety to the operators.
  • the invention is advantageously applicable to projectiles stabilised by an empenna-ge, since in that case the safety cage may at the same time constitute a fin carrier.
  • the detonator is enclosed, in the inoperative position, in an intermediate chamber, from which it is separated by a peripheral space, said chamber being itself housed in the safety cage.
  • the detonator is held in the inoperative position by an inertia member traversed by a conduit adapted to transmit the fire from the head fuze to the detonator.
  • Said inertia member may cooperate in known manner with a system of balls adapted, by displacement, to free the inertia member and at the same time the detonator, which can then assume the operative position.
  • the aforesaid inertia members serves as a secondary safety device and is adapted to be plastically deformed under the effect of the explosion of the detonator, so as to obturate, similarly to a valve, the passage passing through it, thus preventing access of the gases to the interior of the cap and the transmission of fire from the detonator, in the inoperative position to the explosive charge.
  • Figure 1 shows a side elevation partly in section of a finned projectile provided with the device of the present invention
  • Figure 2 is an axial section on a larger scale of the safety device of Fig. 1;
  • Figures 3, 4 and 5 illustrate a modification and show the functioning of the safety device respectively before, during and after the firing of the shot;
  • Figures 6 and 7 illustrate another modification of a structural detail of the safety device of the invention.
  • the projectile shown in Figure 1 is of the hollow charge type and 'has a head fuze 1, an ogival point 2, a charge carrier body 3, a double charge 4, 5 hollowed out to provide an axial cavity or passageway, and a metal cap 6 covering the cavity of the charge 4.
  • An internally hollowed fin carrier 7' is mounted on the base 5a of the charge carrier body 3, and movablefins 8 constituting a folding empennage are articulated at the rear end of the fin carrier 7, as described and claimed in the specification of the co-pending application No. 316,016.
  • the projectile is'packed inside a case 9, the base of which comprises a cartridge carrier 10.
  • the safety device 11 is housed inside the cage which is formed by the fin carrier 7.
  • said safety device comprises a movable detonator 12 which, in-the' inoperative'position, is locked by balls 13 inside a detonator carrier 14 against the action of a spring 15.
  • the detonator 12 is coupled with a relay 16, the jacket 17 of which is supported by a bearing surface 18 onthe balls 13, which in turn are retained in the locking position by means of a ring 19.
  • the latter is adapted to move back on the firing of the shot against the action of a spring 20, thus freeing the balls 13, which are withdrawn into a housing provided for the purpose.
  • the ring 19 After firing and on cessation of the positive acceleration, the ring 19 is retained by an elastic ring 21 in a groove 22 made in the periphery thereof (see Figure 5).
  • the safety device is provided with a supplementary jacket 23 constituting an intermediate chamber inside the safety cage 7 It is moreover advantageous to provide a secondary safety device in the form of an obturator 24 interposed in the fire passage from the head fuze 1 to the detonator 12.
  • the obturator 24 is retained in its housing by a ball 25 preventing it from escaping forwards and by a spring 26 which prevents it from moving backwards during transport and handling.
  • the obturator 24 is connected through the medium of the spring 26 with a valve 27 resting on an inner lip 27'.
  • the relay is replaced by an inertia member 1711 deformable under pressure and retained in position by the balls 13 acting on an annular bearing surface 18a on said inertia member.
  • the latter is traversed by a conduit adapted to transmit fire to the detonator 12.
  • the inertia member 17a has a relatively great wall thickness in relation to its diameter, so that the premature explosion of the detonator
  • the hereindescribed safety device operates as follows:
  • a projectile comprising a jacket open at the front and rear, a percussion fuse in the head of the jacket, an explosive charge inside said jacket and having an axial passageway, a metal cap lining the forward part of said passageway and being open at its rear end to transmit fire from the fuse, a housing mounted on the rear open end of said jacket, said housing having a peripherally spaced supplementary jacket, a detonator, holding means for retaining said detonator in said housing rearwardly of said charge, inertia-actuated means for releasing said detonator and permitting it to move forwardly into the an explosive charge inside said jacket and having an axial passage-way, a metal cap lining the forward part ofsaid passageway and being open at its rear end to transmit fire from'the fuze, a housing mounted onthe rear open end of said jacket, a detonator, and displaceable means for holding said detonator in said housing rearwardly of said charge, and inertia-actuated means for releasing said dc

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Air Bags (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Automotive Seat Belt Assembly (AREA)
US331657A 1952-01-25 1953-01-16 Projectile equipped with a safety device Expired - Lifetime US2737888A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH722646X 1952-01-25

Publications (1)

Publication Number Publication Date
US2737888A true US2737888A (en) 1956-03-13

Family

ID=4531666

Family Applications (1)

Application Number Title Priority Date Filing Date
US331657A Expired - Lifetime US2737888A (en) 1952-01-25 1953-01-16 Projectile equipped with a safety device

Country Status (8)

Country Link
US (1) US2737888A (pt)
BE (1) BE516106A (pt)
CH (1) CH297054A (pt)
DE (1) DE953948C (pt)
FR (1) FR1068411A (pt)
GB (1) GB722646A (pt)
LU (1) LU31870A1 (pt)
NL (2) NL93303C (pt)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2938460A (en) * 1956-09-12 1960-05-31 Energa Finned projectile
US2960036A (en) * 1958-03-10 1960-11-15 Vickers Armstrongs Aircraft Hollow-charge warheads of projectiles
US3010397A (en) * 1939-10-18 1961-11-28 Energa Projectile provided with a safety device
US3023704A (en) * 1957-07-29 1962-03-06 Dawson Philip John Projectiles for mortars and like projectors
US3137233A (en) * 1962-02-23 1964-06-16 Henry S Lipinski Explosive confinement ring
US3190222A (en) * 1961-10-31 1965-06-22 Forsvarets Fabriksstyrelse Impact sensitive top fuze
US3580174A (en) * 1968-03-07 1971-05-25 Oerlikon Buehrle Ag Projectile with hollow explosive charge
US3858515A (en) * 1971-09-06 1975-01-07 Sarmac Sa Projectile fuse
US4334657A (en) * 1977-02-09 1982-06-15 Aktiebolaget Bofors Device for fin-stabilized shell or the like
EP2381211A3 (de) * 2010-04-26 2014-05-21 TDW Gesellschaft für verteidigungstechnische Wirksysteme mbH Zündvorrichtung für einen Penetrator

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU38335A1 (pt) * 1960-03-03
CH617262A5 (pt) * 1977-12-02 1980-05-14 Sarmac Sa
IT1135535B (it) * 1980-03-27 1986-08-27 Sarmac Sa Spoletta di fondello,in particolare per granata da fucile
CA1264123A (en) * 1981-12-08 1990-01-02 John Stuart Mcveagh Hollow charge and liner assemblage

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US672827A (en) * 1898-11-25 1901-04-23 Gathmann Torpedo Gun Company Shell for high explosives.
US734697A (en) * 1897-12-18 1903-07-28 Louis Gathmann Safety-fuse for high-explosive shells.
US1321407A (en) * 1919-11-11 taylor
US1327600A (en) * 1918-08-19 1920-01-06 Bethlehem Steel Corp Base detonating-fuse
US1944780A (en) * 1931-11-30 1934-01-23 Brandt Edgar William Percussion fuse of high sensitivity
US2441388A (en) * 1942-08-19 1948-05-11 George W Blackinton Projectile
GB614320A (en) * 1944-02-10 1948-12-14 Energa Armour piercing explosive projectile
GB625333A (en) * 1946-11-09 1949-06-27 Energa Improvements in or relating to projectiles
US2521739A (en) * 1946-07-16 1950-09-12 Leo T Meister Fuse for bombs
US2697400A (en) * 1944-02-14 1954-12-21 Lyle K Liljegren Projectile with shaped charge and point initiating fuze

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1530336A (en) * 1922-12-20 1925-03-17 Bofors Ab Releasing arrangement at primer safety device in fuse for projectiles

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1321407A (en) * 1919-11-11 taylor
US734697A (en) * 1897-12-18 1903-07-28 Louis Gathmann Safety-fuse for high-explosive shells.
US672827A (en) * 1898-11-25 1901-04-23 Gathmann Torpedo Gun Company Shell for high explosives.
US1327600A (en) * 1918-08-19 1920-01-06 Bethlehem Steel Corp Base detonating-fuse
US1944780A (en) * 1931-11-30 1934-01-23 Brandt Edgar William Percussion fuse of high sensitivity
US2441388A (en) * 1942-08-19 1948-05-11 George W Blackinton Projectile
GB614320A (en) * 1944-02-10 1948-12-14 Energa Armour piercing explosive projectile
US2697400A (en) * 1944-02-14 1954-12-21 Lyle K Liljegren Projectile with shaped charge and point initiating fuze
US2521739A (en) * 1946-07-16 1950-09-12 Leo T Meister Fuse for bombs
GB625333A (en) * 1946-11-09 1949-06-27 Energa Improvements in or relating to projectiles

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3010397A (en) * 1939-10-18 1961-11-28 Energa Projectile provided with a safety device
US2938460A (en) * 1956-09-12 1960-05-31 Energa Finned projectile
US3023704A (en) * 1957-07-29 1962-03-06 Dawson Philip John Projectiles for mortars and like projectors
US2960036A (en) * 1958-03-10 1960-11-15 Vickers Armstrongs Aircraft Hollow-charge warheads of projectiles
US3190222A (en) * 1961-10-31 1965-06-22 Forsvarets Fabriksstyrelse Impact sensitive top fuze
US3137233A (en) * 1962-02-23 1964-06-16 Henry S Lipinski Explosive confinement ring
US3580174A (en) * 1968-03-07 1971-05-25 Oerlikon Buehrle Ag Projectile with hollow explosive charge
US3858515A (en) * 1971-09-06 1975-01-07 Sarmac Sa Projectile fuse
US4334657A (en) * 1977-02-09 1982-06-15 Aktiebolaget Bofors Device for fin-stabilized shell or the like
EP2381211A3 (de) * 2010-04-26 2014-05-21 TDW Gesellschaft für verteidigungstechnische Wirksysteme mbH Zündvorrichtung für einen Penetrator

Also Published As

Publication number Publication date
LU31870A1 (pt)
CH297054A (fr) 1954-03-15
DE953948C (de) 1956-12-06
BE516106A (pt)
FR1068411A (fr) 1954-06-24
GB722646A (en) 1955-01-26
NL175102B (nl)
NL93303C (pt)

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