FR2479444A1 - Pocket rocket, especially for a shotgun, including means of non-arming in the event of a percussion of an approximate obstacle - Google Patents

Pocket rocket, especially for a shotgun, including means of non-arming in the event of a percussion of an approximate obstacle Download PDF

Info

Publication number
FR2479444A1
FR2479444A1 FR8106103A FR8106103A FR2479444A1 FR 2479444 A1 FR2479444 A1 FR 2479444A1 FR 8106103 A FR8106103 A FR 8106103A FR 8106103 A FR8106103 A FR 8106103A FR 2479444 A1 FR2479444 A1 FR 2479444A1
Authority
FR
France
Prior art keywords
rocket
counterweight
fact
striker
detonator
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.)
Withdrawn
Application number
FR8106103A
Other languages
French (fr)
Inventor
Maurice Rusbach
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.)
SARMAC
Original Assignee
SARMAC
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
Priority to CH240680 priority Critical
Application filed by SARMAC filed Critical SARMAC
Publication of FR2479444A1 publication Critical patent/FR2479444A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42AMMUNITION; BLASTING
    • F42CAMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C15/00Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges
    • F42C15/44Arrangements for disarming, or for rendering harmless, fuzes after arming, e.g. after launch
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F42AMMUNITION; BLASTING
    • F42CAMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
    • F42C15/00Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges
    • F42C15/24Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein the safety or arming action is effected by inertia means

Abstract

THE POCKET ROCKET COMPRISING A FIXED BREAKER 17 AND A MOBILE DETONATOR 14, A SPRING 18 TENDING THE DETONATOR AWAY FROM THE BREAKER, AND MEANS OF LOCKING THE DETONATOR IN THE INACTIVE POSITION COMPRISING A MASSELOT 21 SLIDING MOUNT 25 AS WELL AS TO THE ACTION OF MEANS OF DELAYING 24 OF ITS MOVEMENT FORWARD. THIS ROCKET STILL CONTAINS A SECOND MASSELOTTE 22 SLIDING SUBJECT TO ELASTIC ACTION 25 TENDING TO BE SEPARATED FROM THE FIRST MASSELOTTE 21, THIS SECOND MASSELOTTE 22 PROVIDING THE DEFINITIVE LOCKING OF THE DETONATOR IN ITS INACTIVE POSITION WHEN BOTH IN THE TWO MASS 22 THEIR EXTREME ADVANCED POSITION.

Description

The present invention relates to a mechanical base rocket, intended

to equip a projectile,

including a rifle grenade.

  There are such rockets which provide security for storage and transport. Often even the rocket is mounted in the projectile shortly before its use or at least after its long-term storage. These rockets also have muzzle safety, that is to say means making it possible to inhibit the firing of the explosive charge, if the projectile strikes an obstacle placed nearby.

  immediately from the mouth of the launcher, either on

  the first meters of the projectile's trajectory.

  These two safety features of current rockets can however be supplemented. In fact, if the projectile encounters an obstacle during the first meters of its trajectory, current rockets prevent the immediate explosion of the projectile, but it is still armed and the slightest subsequent shock can cause it to explode. This represents a serious danger for the personnel and the aim of the present invention is to produce a base rocket comprising the security of storage and transport, as well as the security of mouth of the previous forms but which moreover ensures the non-arming of the projectile if it strikes an obstacle close to the shooter so that the projectile, not having exploded at the time of this impact, is harmless even after, once it has fallen to the ground, and so that it can be easily evacuated, recovered than destroyed without doing

  call in demining specialists.

  This base rocket for an explosive projectile comprising, housed inside an enclosure, a fixed striker -2 and a movable assembly comprising a detonator, movable between an inactive position housed in a hollow body, distant from the striker and a position activates in contact with this striker, a spring tending to move the moving element away from the

  striker, and further comprising locking means

  lage of the moving part in the inactive position compre-

  nant a counterweight sliding mounted Outside the hollow body and subjected to an elastic action as well as to the action of means for delaying its movement forward under the effect of said elastic action, is characterized by the fact that it comprises a second sliding weight outside the hollow body subjected to an elastic action tending to separate it from the first weight, this second weight ensuring the final locking of the moving assembly in its inactive proposition when the two weights are in their position

extreme advanced.

  The attached drawing illustrates schematically and by way of example a rifle grenade equipped with

  the base rocket according to the invention.

  Figure 1 is a sectional view of a first embodiment of a rifle grenade provided

of the base rocket.

  Figure 2 illustrates a detail of the rocket

pellet.

  FIG. 3 illustrates the baffles of the base rocket delaying the arming of the projectile at

kick start.

  FIG. 4 is a longitudinal section of the base rocket in the inert storage position and

transport.

  Figure 5 is a half longitudinal section

- 3 - 24.79444

  illustrating the position of the rocket parts at the start

therefore.

  FIG. 6 is a half longitudinal section illustrating the position of the parts of the rocket when the projectile is on its trajectory, after the delay

mouth safety.

  Figure 7 is a longitudinal half section illustrating the position of the parts of the rocket at the impact of the projectile at the end of normal trajectory

on the goal.

  FIG. 8 is a longitudinal half section illustrating the position of the parts of the rocket after the projectile has undergone a negative acceleration during the muzzle safety delay, that is to say

  on the first meters of its trajectory.

  Figure 9 is a half longitudinal section

  showing the parts of the rocket after the projection

  tile has experienced a negative acceleration during

  mouth safety delay but before the mass-

  monkfish have reached their maximum movements.

  Figure 10 is a longitudinal section

  another projectile fitted with the base rocket.

  FIG. 11 is a longitudinal section of a variant of the base rocket, in the position of

inert storage.

  The present base rocket 1 is intended to equip various explosive projectiles 2 and in particular rifle grenades. This rocket is called a pellet because it is located in the projectile at the rear of the

explosive charge 3 of projectile 2.

  This base rocket 1 comprises a sealed enclosure formed by a rigid shell 4 and of a significant thickness situated outside the explosive charge 3 of the projectile 2. This shell is closed at its rear end by a body 5 crimped using a skirt 6 of

4 - 2479444

  this housing 4. The housing 4 is extended forward by a thin sheath 7 closed at its front end by a plug 8 provided with a point constituting the

striker 17.

  The body 5 comprises a central recess, receiving a movable detonator, delimited by a skirt 9 bearing by its edge, before against a shoulder of the housing 4 via the sheath which is

  thus rigidly fixed to the skirt 9.

  The mobile detonator sliding in the recess

  central body 5 and in the sheath 7 has a mass II provided with a peripheral locking groove 12 and a thin skirt 13 extending forward containing a primary charge 16 and a secondary charge 14 and

set on a cover 15.

  The striker 17 is housed in the upper part of the sheath 7 and can come into contact with the primary charge 16 of the detonator, when the latter moves towards the front of the rocket by effect

of inertia.

  A spring 18 tends to hold the crew

  mobile (detonator) in the body 5 away from the percussion

17.

  The skirt 9 of the body has at least one bore 19 located, when the movable assembly is in

  rear position, opposite the blocking groove 12.

  A space 20 is provided between the housing 4 and

  the body 5 in which two annular masses are housed

sliding tracks 21, 22.

  Each of these annular masses has a head or rim with a thickness substantially equal to that of the space 20 to guide and center the mass in its longitudinal displacements. Each mass 21, 22 also comprises a thinner skirt, which can overlap in the space 20 and whose

- 5 - 2479444

  lengths are such that whatever the posi-

  relative masses 21, 22 these skirts overlap

  always smells at least partially.

  In addition, the skirt of the anterior annular mass 28 is of a length such that when this mass 21 is in its extreme front position, its head in abutment against the housing 4, the bore 19 of the body 5 is released. The anterior annular mass 21 comprises a stud 23 engaged in a groove 24 formed in the cylindrical wall of the skirt 9 of the body 5. This groove 24 is illustrated in plan in FIG. 3 and comprises a locking branch 24a and a delay branch 24b having a number of zigzag baffles slowing the axial displacement towards the front of the

mass 21.

  A spring 25 tends to separate the two masses

annulars 21, 22 from each other.

  Finally, the posterior annular mass 22 comprises a peripheral groove containing an elastic rod 26 intended to lock this mass 22 in the extreme front position by cooperating with a locking groove 27 formed in the internal wall of the

shoemaker 4.

  In the inactive storage and transfer position

  port the base rocket is in the state illustrated in FIG. 4. The mobile detonator is in the rear position, at the bottom of the central housing of the body 5. This mobile detonator is locked in this position by a ball 28 located in each bore 19 of the body and projecting into the blocking groove 12 of the mass 11. The ball 28 is held in this position by the skirt of the front counterweight 21. The rear counterweight 22

  is in the extreme rear position while the mass-

  anterior monkfish 21 is kept in a position

- 6 - 2479444

  intermediate by its stud 23 which is located at the top

  of the locking branch 24a of the groove 24.

  Normal operation of the rocket described

is the next.

  At the time of the start of the blow (FIG. 5), that is to say of the launching of the projectile 2, the rocket undergoes a strong acceleration and the anterior counterweight 21 retreats with respect to the body 5 until the moment when the nipple 23 is

  located in the low position 24c of the glass groove

rusting 24.

  When the acceleration of the kick start

  ceases, the front counterweight 21 moves towards the a-

  vant under the effect of the spring 25. This movement is however braked and slowed down by the zigzag baffles of the branch 24b of the locking groove 24 that

should follow the nipple 23.

  When the flyweight 21 comes into abutment against the shoemaker (Figure 6) and the first meters

  or tens of meters from the trajectory have been traveled

  rus smoothly, the ball 28 is released by the skirt of the counterweight 21 and this ball in turn releases the

  mass 11 of the mobile detonator. The rocket is thus armed.

  Upon impact (Figure 7) the mobile detonator advances under the effect of the sudden deceleration and the primary charge 16 of the detonator strikes the striker 17, causing the secondary charge of the detonator to fire, which is now located in

  explosive charge 3 and causes it to explode

  this. At the same time, the counterweight 22 moves forward under the effect of the deceleration but this

  has no effect on the operation of the rocket.

  On the other hand, when the projectile accidentally hits an obstacle during the first meters of the trajectory, that is to say before the 7 - anterior counterweight 21 is in its extreme front position, the counterweight 22, under the effect of the deceleration of the projectile, moves forward against the action of the spring 25 and comes into contact with the front counterweight 21 (Figure 9) and moves with it until in its extreme front position (Figure 8). Under these conditions, the head of the rear counterweight 22 locks the ball 28 at the moment when the skirt of the front counterweight 21 releases this ball, from

  so that the mobile detonator remains locked.

  When the flyweights 21 and 22 reach their extreme front position (FIG. 8) the rod 26 of the flyweight 22 is located opposite the groove 27 and can relax elastically thereby causing the flyweights 21 and 22 to be permanently blocked in their

  extreme forward position and thereby ensures the locking

  The definitive length of the mobile detonator in the inactive position.

  In this way the projectile is not fired

  and remains inert. It therefore became harmless.

  Figures 9 and 10 illustrate a variant

  of the base rocket whose operation is identified

  than the one described above.

  It is obvious that in variants not illustrated, the detonator could be mounted in a mobile assembly which would be locked like said

  mobile detonator. This mobile crew could include

  ter further a pyrotechnic delay or other elements. Of course various modifications can be made by those skilled in the art to the device which has just been described only by way of non-example (s).

  limiting (s) without departing from the scope of the invention.

-8 -

Claims (6)

  1. Base rocket for explosive projectile
  both housed inside an enclosure (4), a person
  fixed cutter (17) and a mobile assembly comprising a detonator (11,14,16), movable between an inactive position, housed in a hollow body (5), distant from the striker and an active position in contact with it
  striker; a spring (18> tending to distance the equi-
  mobile page of the striker, and still comprising mo-
  yen for locking the moving element in position
  inactive including a flyweight mounted (21)
  health outside the hollow body and subjected to an elastic action as well as to the action of means (23,24) for delaying its forward movement under the effect of said elastic action, characterized by the fact that it comprises a second counterweight (22) sliding outside the hollow body subjected to an elastic action tending to separate it from the first
  counterweight, this second counterweight ensuring the ver-
  permanent rusting of the moving part in its po-
  inactive position when the two flyweights are
  wind in their extreme forward position.
  2. Base rocket according to claim 1, charac-
  terrified by the fact that elastic actions act
  health on the weights are carried out by only one
spring (25).
  3. Base rocket according to claim 1 or the
  claim 2, characterized in that it comprises
  carries means for blocking the second counterweight
in its extreme forward position.
  4. Rocket base according to claim 3, charac-
  terrified by the fact that these locking means are t '9 _ constituted by an elastic ring (26) housed in a
  peripheral groove (27) of the second counterweight
  designed to cooperate with a peripheral groove formed in the internal wall of a shoemaker forming part of the enclosure.
5. Rocket according to claim 4, characterized by
  the fact that the two weights are annular and
  smooth in an annular space (20) between the
hollow body and the shoemaker.
  6. Rocket according to one of the preceding claims,
  characterized by the fact that the enclosure is waterproof and that it comprises a shoemaker (4) and a sheath (7), the striker being fixed to one of the ends of this sheath.
FR8106103A 1980-03-27 1981-03-26 Pocket rocket, especially for a shotgun, including means of non-arming in the event of a percussion of an approximate obstacle Withdrawn FR2479444A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CH240680 1980-03-27

Publications (1)

Publication Number Publication Date
FR2479444A1 true FR2479444A1 (en) 1981-10-02

Family

ID=4233045

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8106103A Withdrawn FR2479444A1 (en) 1980-03-27 1981-03-26 Pocket rocket, especially for a shotgun, including means of non-arming in the event of a percussion of an approximate obstacle

Country Status (6)

Country Link
BE (1) BE888119A (en)
DE (2) DE8109086U1 (en)
ES (1) ES500716A0 (en)
FR (1) FR2479444A1 (en)
GB (1) GB2072809A (en)
IT (1) IT1135535B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT383891B (en) * 1982-08-03 1987-09-10 Oregon Ets Patentverwertung Grenade
US4597261A (en) * 1984-05-25 1986-07-01 Hughes Aircraft Company Thermally actuated rocket motor safety system
DE3663196D1 (en) * 1985-12-17 1989-06-08 Oerlikon Buehrle Ag Impact fuze for a projectile
BE1005559A3 (en) * 1991-02-14 1993-10-26 Herstal Sa Safety device, respectively time-delay, for projectile
CN107314722A (en) * 2017-04-24 2017-11-03 重庆长安工业(集团)有限责任公司 Suitable for low speed, low overload, micro- rotating environment Zhe Fa insurance institutions

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU31870A1 (en) * 1952-01-25
GB191104698A (en) * 1910-09-26 1911-07-13 Eugene Schneider Improvements in or relating to Percussion Fuses for Projectiles.
GB191208067A (en) * 1911-04-10 1912-11-28 Bofors Gullspang Ab Improvements in and relating to safety Devices for Gun Shell Fuses.
FR690879A (en) * 1929-02-18 1930-09-26 Anciens Ets Skoda Rocket safety
CH302584A (en) * 1952-03-21 1954-10-31 Inventa Ag Device for the shock-proof storage of moving parts on projectile fuses when firing.
FR1082594A (en) * 1952-09-15 1954-12-30 Belge De Mecanique Et D Armeme Rifle grenade
FR1221429A (en) * 1958-03-28 1960-06-01 Oerlikon Buehrle Ag Rocket percussion
FR1300100A (en) * 1960-10-29 1962-07-27 Energa Rocket pellet

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191104698A (en) * 1910-09-26 1911-07-13 Eugene Schneider Improvements in or relating to Percussion Fuses for Projectiles.
GB191208067A (en) * 1911-04-10 1912-11-28 Bofors Gullspang Ab Improvements in and relating to safety Devices for Gun Shell Fuses.
FR690879A (en) * 1929-02-18 1930-09-26 Anciens Ets Skoda Rocket safety
LU31870A1 (en) * 1952-01-25
CH302584A (en) * 1952-03-21 1954-10-31 Inventa Ag Device for the shock-proof storage of moving parts on projectile fuses when firing.
FR1082594A (en) * 1952-09-15 1954-12-30 Belge De Mecanique Et D Armeme Rifle grenade
FR1221429A (en) * 1958-03-28 1960-06-01 Oerlikon Buehrle Ag Rocket percussion
FR1300100A (en) * 1960-10-29 1962-07-27 Energa Rocket pellet

Also Published As

Publication number Publication date
IT8119849D0 (en) 1981-02-19
BE888119A (en) 1981-09-28
DE8109086U1 (en) 1981-09-10
ES8302297A1 (en) 1982-05-16
ES500716D0 (en)
GB2072809A (en) 1981-10-07
IT1135535B (en) 1986-08-27
BE888119A1 (en)
DE3112191A1 (en) 1982-01-14
ES500716A0 (en) 1982-05-16

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