US2737888A - Projectile equipped with a safety device - Google Patents
Projectile equipped with a safety device Download PDFInfo
- 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
- Authority
- 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
Links
Images
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Automotive Seat Belt Assembly (AREA)
- Portable Nailing Machines And Staplers (AREA)
- Air Bags (AREA)
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 (et) |
BE (1) | BE516106A (et) |
CH (1) | CH297054A (et) |
DE (1) | DE953948C (et) |
FR (1) | FR1068411A (et) |
GB (1) | GB722646A (et) |
LU (1) | LU31870A1 (et) |
NL (2) | NL175102B (et) |
Cited By (10)
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
LU38335A1 (et) * | 1960-03-03 | |||
CH617262A5 (et) * | 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)
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)
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 |
-
0
- LU LU31870D patent/LU31870A1/xx unknown
- NL NL93303D patent/NL93303C/xx active
- NL NLAANVRAGE7410677,A patent/NL175102B/xx unknown
- BE BE516106D patent/BE516106A/xx unknown
-
1952
- 1952-01-25 CH CH297054D patent/CH297054A/fr unknown
- 1952-12-12 DE DEA17088A patent/DE953948C/de not_active Expired
- 1952-12-18 FR FR1068411D patent/FR1068411A/fr not_active Expired
-
1953
- 1953-01-01 GB GB75/53A patent/GB722646A/en not_active Expired
- 1953-01-16 US US331657A patent/US2737888A/en not_active Expired - Lifetime
Patent Citations (10)
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)
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 |
---|---|
NL93303C (et) | |
DE953948C (de) | 1956-12-06 |
FR1068411A (fr) | 1954-06-24 |
GB722646A (en) | 1955-01-26 |
LU31870A1 (et) | |
BE516106A (et) | |
CH297054A (fr) | 1954-03-15 |
NL175102B (nl) |
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