US3491689A - Projectile having a useful charge which must be released at a point on the projectile trajectory - Google Patents

Projectile having a useful charge which must be released at a point on the projectile trajectory Download PDF

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Publication number
US3491689A
US3491689A US735458A US3491689DA US3491689A US 3491689 A US3491689 A US 3491689A US 735458 A US735458 A US 735458A US 3491689D A US3491689D A US 3491689DA US 3491689 A US3491689 A US 3491689A
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United States
Prior art keywords
projectile
charge
useful
trajectory
fuze
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Expired - Lifetime
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US735458A
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English (en)
Inventor
Marcel Francois
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.)
Compagnie Francaise Thomson Houston SA
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Compagnie Francaise Thomson Houston SA
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Expired - Lifetime legal-status Critical Current

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    • 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
    • F42B12/36—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect for dispensing materials; for producing chemical or physical reaction; for signalling ; for transmitting information
    • F42B12/56—Projectiles, missiles or mines characterised by the warhead, the intended effect, or the material characterised by the warhead or the intended effect for dispensing materials; for producing chemical or physical reaction; for signalling ; for transmitting information for dispensing discrete solid bodies
    • F42B12/58—Cluster or cargo ammunition, i.e. projectiles containing one or more submissiles
    • F42B12/62—Cluster or cargo ammunition, i.e. projectiles containing one or more submissiles the submissiles being ejected parallel to the longitudinal axis of the projectile

Definitions

  • the latter is connected to a braking parachute and the projectile base contains a projectile tilting charge and carries a lateral nozzle at the rear of the centre of gravity of the projectile for creating, under the elfect of the gases produced by the tilting charge and ejected through the nozzle, a couple which tilts the projectile on its trajectory.
  • Delay means are disposed between the fuze and the ejecting and tilting charges so that combustion of the tilting charge precedes ignition of the ejecting charge.
  • the present invention relates to projectiles of the type having a useful charge, such as an illuminating or flare charge which must be released at a point on the trajectory and then braked relative to the rest of the projectile.
  • a useful charge such as an illuminating or flare charge which must be released at a point on the trajectory and then braked relative to the rest of the projectile.
  • the useful charge is usually separated from the rest of the projectile at a given point on the trajectory by means of a time fuze containing a small explosive charge of the black powder type and a clock mechanism which is set before tiring the projectile.
  • the useful charge is provided with a parachute which opens at the moment of separation and, owing to the braking action thereof, allows the useful charge to continue its descent at low speed. Now, at the moment of separation, the projectile splits up into a plurality of parts.
  • the base of the projectile constitutes in fact the most dangerous part for this canopy owing to its weight and position.
  • This part of the projectile is heavy since, when firing, it must be capable of withstanding the thrust of the gases and consequently its wall is thick and strong. Further, this base carries in many cases a rear iin structure or, when it concerns a self-propelling projectile, propelling means.
  • the object of the invention is to provide a projectile of the aforementioned type which remedies these drawbacks.
  • the projectile according to the invention is of the type comprising a time fuze for igniting the useful charge and an explosive ejecting charge adapted to eject, from the body of the projectile, the useful charge which is connected to a braking parachute, wherein the base of the projectile contains, in addition to said charge for ejecting said use- Lit() 3,491,689 Patented Jan.
  • a projectile tilting charge and carries a lateral nozzle which is located at the rear of the centre of gravity of the projectile so as to create, under the effect of the ejection of gases produced by the combustion ofsaid tilting charge, a couple which tilts the projectile, delay means being disposed between said fuze and said ejecting and tilting charges whereby the combustion of said tilting charge precedes the ignition of said ejecting charge.
  • the ignition of the time fuze therefore rst produces the ignition of the useful charge and tilting charge, the projectile tilts owing to the ejection of the gases through the lateral nozzle, then the useful charge is expelled with its parachute in a direction parallel to the axis of the tilted projectile, that is, at an angle relative to the tangent to the trajectory of the projectile, and consequently the canopy of the parachute opens off the trajectory of the -body of the projectile so that the latter cannot damage it.
  • FIG. 1 is a longitudinal sectional view of a projectile according to the invention
  • FIG. 2 is a cross-sectional View taken along line 2-2 of FIG. l;
  • FIG. 3 is a partial detail longitudinal sectional view of the projectile on a scale larger than that of FIG. l, and
  • FIGS. 4-8 are diagrams showing the elements of the projectile in the various stages on the projectile trajectory.
  • the invention is applied to a projectile comprising a head A, a body B, a base C and a n structure D carried by the latter.
  • This projectile contains a useful charge or load E which, in the presently-described embodiment, is an illuminating device or flare.
  • the head A of the projectile comprises a time fuze 1 containing an adjustable delay means and an explosive charge 2 of the black powder type fixed on a support 3.
  • the body B of the projectile comprises a cylindrical case 4 the front end of which is connected to the support 3 by shearable pins 5.
  • This body contains the useful charge or load E consisting of a container 6 containing an illuminating charge 7 which can be ignited by the charge 2 of the fuze through pyrotechnic delay means 8.
  • a ⁇ cable 9 and suspending lines 9a Fixed to this container 6 by a ⁇ cable 9 and suspending lines 9a (see FIG. 7) is the canopy 10 of a parachute.
  • This canopy is disposed in an envelope consisting of two half-shells 11 and 11a and a pot 12.
  • the half-shells 11 and 11a and the pot 12 are retained in the body 4 by a ring 13 which bears against a flange 14 on the pot and is merely a tight it in the body 4. Screwed in this ring 13 is the front end of the base C.
  • the body of the projectile has an axial tube 15 which extends therethrough and transmits rearwardly the iiames from the combustion of the igniting charge 2 to two rear charges 16 and 17 by lway of delay apertures 18, 19.
  • the charge 16 can ignite, through pyrotechnic delay means 20 (FIGS. 1 and 2), a pot ejecting charge 21, whereas the charge 17 can ignite, through apertures 22, an auxiliary propelling charge 23 the ignition of Awhich produces propelling gases which are ejected through the bore 24 of a lateral nozzle 25, after expulsion of a closing plug 26 by the pressure of said gases.
  • the delay means 8, 20, 22 are such that the operation of the fuze 1 and the ignition of the charge 2 at time T results, rstly, in the ignition, by way of the apertures 22, of the propelling charge 23 whose combustion lasts about 0.04 second and, then, the ignition by way of the delay means 20, of the potejecting charge 21, at about time T
  • the projectile therefore operates in the following manner:
  • the latter ignites the charge 2.
  • the projectile is at P1 on its trajectory. It is for example propelled at a speed V of the order of 200 metres per sec.
  • the propelling charge 23 is ignited and burns from about T to T-l-0.04 second.
  • the latter therefore tilts on its trajectory.
  • the projectile has tilted to the position P2 (FIG. 5) and its longitudinal axis then makes an angle of, for example, 30 with the tangent T of the trajectory.
  • This charge 21 explodes and the pins 5 shear under the effect of the pressure created and the contents of the projectile, namely the fuze 1, the charge E and the parachute with its envelope (11, 12) is expelled forwardly in a direction parallel to the longitudinal axis of the projectile (FIG. 6) with a speed v relative to the assembly (body E, base C, fin structure D) for example of the order of 10-20 metres per sec.
  • the useful charge E has travelled through a few decimetres relative to the assembly (E, C, D) and the angle of tilt is then about 45 (FIG. 6).
  • the canopy 10 of the parachute starts to open at the end of the suspending lines 9a, which connect it to the charge E through the cable 9, whereas the half-shells 11, 11R and the pot 12 are seperated therefrom (FIG. 7).
  • the device is of utility for projectiles of small calibre (-81 mm.) since it requires very little space.
  • the assembly is very strong owing to the fact that the shearable pins 5 are located in the front part of the projectile, since the assembly A, B, C, constitutes a rigid unit.
  • a projectile comprising a body having a base and, disposed in said body: a useful charge which must be released at a point on the projectile trajectory, a braking parachute connected to said useful charge, an explosive ejecting charge disposed in said base and adapted to eject from said body said useful charge, a time-delay fuze having a fuze charge communicating with said useful charge and said ejecting charge for igniting said useful and ejecting charges, said base containing, in addition to said ejecting charge, a projectile tilting charge which communicates with said fuze charge, said ybase including a lateral gas ejection nozzle which communicates with said tilting charge and is located to the rear of the centre of gravity of the projectile and so oriented as to eject laterally gases produced by the combustion of said tilting charge and create a moment which tilts the projectile, and delay means interposed between said fuze charge and said ejecting charge and between said fuze charge and said tilting charge and said
  • a projectile as claimed in claim 1, comprising an envelope for said parachute, said envelope comprising the combination of two adjacent freely disposed half-shells and a rear frustoconical pot.
  • a projectile as claimed in claim 1, comprising an axial tube communicating with said fuze charge, an axial powder charge located to the rear of said axial tube and communicating with said fuze charge via said tube so that said axial tube transmits the flames produced by said fuze charge to said axial powder charge, said ejecting and tilting charges communicating with said axial powder charge through said delay means.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Toys (AREA)
US735458A 1967-06-13 1968-06-07 Projectile having a useful charge which must be released at a point on the projectile trajectory Expired - Lifetime US3491689A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR110100A FR1533978A (fr) 1967-06-13 1967-06-13 Projectile perfectionné à charge utile devant être libérée en un point de la trajectoire

Publications (1)

Publication Number Publication Date
US3491689A true US3491689A (en) 1970-01-27

Family

ID=8632875

Family Applications (1)

Application Number Title Priority Date Filing Date
US735458A Expired - Lifetime US3491689A (en) 1967-06-13 1968-06-07 Projectile having a useful charge which must be released at a point on the projectile trajectory

Country Status (15)

Country Link
US (1) US3491689A (xx)
AT (1) AT286144B (xx)
BE (1) BE716349A (xx)
CH (1) CH470649A (xx)
DE (1) DE1703557B2 (xx)
DK (1) DK133066C (xx)
ES (1) ES355023A1 (xx)
FI (1) FI53890C (xx)
FR (1) FR1533978A (xx)
GB (1) GB1199239A (xx)
IL (1) IL30095A (xx)
LU (1) LU56243A1 (xx)
NL (2) NL6808199A (xx)
NO (1) NO124008B (xx)
SE (1) SE332584B (xx)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2422142A1 (de) * 1974-05-08 1975-11-20 Dynamit Nobel Ag Schraubverbindung mit sollbruchstelle
US3946672A (en) * 1974-08-13 1976-03-30 Thiokol Corporation Rocket propelled projectile
US4005656A (en) * 1974-06-27 1977-02-01 Ab Bofors Device for a pyrotechnical flare body comprising a flame spreader for the flame emitted by the flare body
US4023496A (en) * 1972-08-09 1977-05-17 The United States Of America As Represented By The Secretary Of The Army Ejector motor braking system
US4833993A (en) * 1986-11-26 1989-05-30 Esperanza Y Cia., S.A. Army mortar shell
US4869174A (en) * 1988-03-18 1989-09-26 Buck Werke Gmbh, & Co. Exercise firing projectile
US5347931A (en) * 1992-11-12 1994-09-20 Thiokol Corporation Combustible flare ignition system
EP2063215A3 (de) * 2007-11-26 2013-02-20 Rheinmetall Waffe Munition GmbH Munition oder Geschoss zur Gefechtsfeldbeleuchtung
KR101320978B1 (ko) 2005-09-10 2013-10-22 디일 베게테 디펜스 게엠베하 운트 코 카게 유도 폭탄
US20190137246A1 (en) * 2016-04-06 2019-05-09 Bae Systems Bofors Ab Parachute device for a divisible shell
US20220373312A1 (en) * 2019-09-06 2022-11-24 Cta International Anti-air shell for telescoped ammunition with double unlock

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3111907A1 (de) * 1981-03-26 1982-10-07 Dynamit Nobel Ag, 5210 Troisdorf Verfahren zum verteilen von submunition
ES2000853A6 (es) * 1986-08-08 1988-03-16 Esperanza & Cie Sa Proyectil portador para mortero
SE468367B (sv) * 1989-08-17 1992-12-21 Bofors Ab Separeringssaett foer verkansdelar

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2362534A (en) * 1940-01-12 1944-11-14 Sageb Sa Lighting projectile

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2362534A (en) * 1940-01-12 1944-11-14 Sageb Sa Lighting projectile

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4023496A (en) * 1972-08-09 1977-05-17 The United States Of America As Represented By The Secretary Of The Army Ejector motor braking system
DE2422142A1 (de) * 1974-05-08 1975-11-20 Dynamit Nobel Ag Schraubverbindung mit sollbruchstelle
US4005656A (en) * 1974-06-27 1977-02-01 Ab Bofors Device for a pyrotechnical flare body comprising a flame spreader for the flame emitted by the flare body
US3946672A (en) * 1974-08-13 1976-03-30 Thiokol Corporation Rocket propelled projectile
US4833993A (en) * 1986-11-26 1989-05-30 Esperanza Y Cia., S.A. Army mortar shell
US4869174A (en) * 1988-03-18 1989-09-26 Buck Werke Gmbh, & Co. Exercise firing projectile
US5347931A (en) * 1992-11-12 1994-09-20 Thiokol Corporation Combustible flare ignition system
KR101320978B1 (ko) 2005-09-10 2013-10-22 디일 베게테 디펜스 게엠베하 운트 코 카게 유도 폭탄
EP2063215A3 (de) * 2007-11-26 2013-02-20 Rheinmetall Waffe Munition GmbH Munition oder Geschoss zur Gefechtsfeldbeleuchtung
US20190137246A1 (en) * 2016-04-06 2019-05-09 Bae Systems Bofors Ab Parachute device for a divisible shell
US10458765B2 (en) * 2016-04-06 2019-10-29 Bae Systems Bofors Ab Parachute device for divisible shell
US20220373312A1 (en) * 2019-09-06 2022-11-24 Cta International Anti-air shell for telescoped ammunition with double unlock
US11835325B2 (en) * 2019-09-06 2023-12-05 Cta International Anti-air shell for telescoped ammunition with double unlock

Also Published As

Publication number Publication date
FI53890C (fi) 1978-08-10
ES355023A1 (es) 1969-11-16
BE716349A (xx) 1968-11-04
SE332584B (xx) 1971-02-08
DE1703557B2 (de) 1973-05-30
GB1199239A (en) 1970-07-15
DK133066B (da) 1976-03-15
CH470649A (fr) 1969-03-31
DE1703557A1 (de) 1971-11-11
NL6808199A (xx) 1968-12-16
AT286144B (de) 1970-11-25
NL136006C (xx)
DK133066C (da) 1976-08-16
IL30095A (en) 1972-01-27
FI53890B (fi) 1978-05-02
LU56243A1 (xx) 1968-09-23
NO124008B (xx) 1972-02-14
IL30095A0 (en) 1970-03-22
DE1703557C3 (xx) 1973-12-20
FR1533978A (fr) 1968-07-26

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