US3858515A - Projectile fuse - Google Patents

Projectile fuse Download PDF

Info

Publication number
US3858515A
US3858515A US282112A US28211272A US3858515A US 3858515 A US3858515 A US 3858515A US 282112 A US282112 A US 282112A US 28211272 A US28211272 A US 28211272A US 3858515 A US3858515 A US 3858515A
Authority
US
United States
Prior art keywords
detonator
projectile
fuse
passageway
primer
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
US282112A
Other languages
English (en)
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 SA
Original Assignee
Sarmac SA
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 Sarmac SA filed Critical Sarmac SA
Application granted granted Critical
Publication of US3858515A publication Critical patent/US3858515A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • F42C15/18—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein a carrier for an element of the pyrotechnic or explosive train is moved
    • F42C15/184—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein a carrier for an element of the pyrotechnic or explosive train is moved using a slidable carrier
    • 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
    • F42C15/20—Arming-means in fuzes; Safety means for preventing premature detonation of fuzes or charges wherein a securing-pin or latch is removed to arm the fuze, e.g. removed from the firing-pin
    • 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

Definitions

  • ABSTRACT A fuse for an explosive projectile comprises a forward [30] Foreign Application Priority Data primer and a rearward detonator that is exploded by the primer and that communicates with the primer Sept.
  • the detonator and a valve that closes the passageway are mounted as an IOZ/ggggggg assembly for Conjoint Sliding movement from a [58] Fie'ld 6 79 85 6 ward position in which the detonator is outside the ex- 1 6 plosive charge of the projectile, to a rearward position in which the detonator is disposed within that explo- [56] References Cited sive charge, under the influence of the inertia of the assembly when the projectile is launched and is accel- UNITED STATES PATENTS crating.
  • PROJECTILE FUSE a projectile fuse which overcomes the above disadvantages.
  • a further object of the present invention is the provision of a projectile fuse with whichaccidental explosion of the projectile is prevented.
  • a still further object of the invention is the provision of a projectile fuse which arms the projectile only when the projectile is well away from the launching site.
  • Another object of the present invention is the provision of a projectile fuse whi ch will be relatively simple and inexpensive to manufacture, easy to assemble, light in weight, and reliable in use.
  • a projectile fuse comprising a firing primer at the forward end of the fuse and a detonator connected to the primer by a firing passageway which is ordinarily closed by a safety device.
  • the detonator is displaceable between a forward inactive position in which it is disposed outside the explosive charge of the projectile and an active position in which it is located inside the explosive charge by the acceleration of the projectile upon launching, and is characterizedby the fact that the displacement of the detonator, takes place parallel'to the longitudinal'axis of the fuse and that the safety device comprises a valve that closes the firing passage and is mechanically connected to the detonator so as to move axially as an assembly with the detonator.
  • FIG. 1 is an enlarged partially cross sectional view of a first form of projectile fuse according to the present invention
  • FIG. 2 is a fragmentary cross-sectional view taken at right angles to FIG. 1;
  • FIG. 3 is a cross-sectional view taken on the line 3-3 of FIG. 2;
  • FIG. 4 is a fragmentary view of the safety device of the fuse shown in FIG. 1;
  • FIG. 5 is a view similar to FIG. 1 but showing a second embodiment of the invention.
  • FIG. 6 is a view similar to FIGS. 1 and 5 but showing a third embodiment of the invention.
  • FIG. 7 is a view similar to FIGS. 1, 5 and 6, but showing a variant of the third form of FIG. 6;
  • FIG. 8 is a view similar to FIGS. 1, 5, 6 and 7, but showing a fourth embodimentof the invention.
  • a fuse according to the present invention adapted to be fixed in operative position in the nose of an explosive projectile (not shown in FIG. 1) coaxially of the projectile.
  • the fuse forms in effect the forward end of the projectile and comprises a primer 3 as well as'the prim'ers firing device, which latter may be either mechanical or electrical but in any event is operated by the impact of the projectile or by a timing device or an inertial device actuated by the launching or by the impact of the projectile.
  • primer 3 is an electrical primer and is fired by the arrival of an electric current.
  • This current is supplied by a current generator, which may for example be a battery or any other suitable generator, the current being delivered to the primer 3 when a switch, actuated by the impact of the projectile, is closed.
  • the switch may have the conventional form of a double cap deformable by the impact of the projectile, each element of the cap being of an electrically conductive material and comprising one of the contacts of the switch.
  • Primer 3 is maintained in operative position in sleeve 4 by means of which it is maintained forwardly of the projectile. Primer 3 is threaded in sleeve 4 which itself is threaded in the upper end of a tubular casing 5 of the fuse. The other contact of the electric primer 3 is placed in electric contact by means of contact member 1 with the internal cap.
  • the tubular casing 5 comprises a forward portion whose internal diameter is less than the internal-diameter of its rear portion so that an annular shoulder 6 is provided about midway of the length of casing 5.
  • a lower sleeve 7 is threaded on the lower end of casing 5 and also has an external screw thread 8 for securement of the fuse to the nose of the projectile. This securement may be effected, as indicated in FIG.
  • a member 9 of insulating material for example of plastic, having the form of a ring whose internal screw threading coopcrates with that of the lower sleeve so that its external screw threading will mate with the forward end of the projectile which encloses the explosive charge 10, which in the embodiment illustrated in FIG. 5 is constituted by a frangible sleeve 11.
  • Lower sleeve 7 also serves for the mounting of a casing 12 which defines a cavity extending from the operative position of the fuse to the interior of the explosive charge 10 of the projectile and located along a prolongation of the axis of the fuse.
  • a guide socket 13 is disposed in the lower portion of larger diameter of casing 5 and comprises an internal wall located in the elongation of the internal wall of the upper part of easing 5.
  • the upper end of guide socket 13 is of reduced thickness so as to be offset relative to the annular shoulder 6 and to form with shoulder 6 an annular recess 14.
  • the lower end of guide socket 13 comprises a wall whose annular end 15 has an internal diameter corresponding to that of the recess formed by casing 12 and whose external diameter corresponds to that outside the casing.
  • This guide sleeve is maintained in position by the lower sleeve 7 and is grasped by sleeve 7 between the lower confronting surface of the casing 5 and a flange 16 of casing 12.
  • an assembly comprising a detonator 17 and the safetly device of the fuse.
  • This assembly comprises a rear plug 18 to which is secured a tubular bushing 19.
  • Detonator 17 is disposed in bushing 19 and rests on the forward surface of plug 18.
  • An upper plug 20 is disposed atop detonator l7 and has a central opening 21 which comprises a portion of the firing passageway connecting the primer 3 to the detonator 17.
  • This assembly also comprises the safety device itself which, in its rest position shown in FIG. 1, closes the firing passageway connecting the primer 3 to the detonator 17.
  • This safety device comprises a cylindrical valve 22 whose axis is perpendicular to that of the fuse. Valve 22 is displaceable linearly within a bore 23 provided in the upper plug 20.
  • the upper part of plug 20 comprises a guide and provides an opening 24 that communicates with bore 23 and which is coaxial with the fuse.
  • the upper part of plug 20 also has a bore 25 of larger diameter whose upper part closes the lower end of the socket of primer 3.
  • the head 26 of the plug 20 slides in the casing and has an external diameter corresponding to the internal diameter of casing 5 so as to guide the assembly in its axial displacements.
  • Bushing 19 is also secured to the upper plug above latch 22 so that the axial positions of the upper and lower plugs as well as the axial position of the detonator are fixed relative to each other.
  • a coil compression spring 27 acts between the annular end wall of guide socket l3 and the head 26 of the upper plug to urge the assembly of the upper and lower plugs and the detonator to an advanced rest position in which the upper surface of head 26 of plug 20 bears against the lower face of the upper sleeve 4.
  • the detonator 17 is located outside of and above the explosive charge 10 of the projectile and is separated therefrom by the lower plug 18 which prevents any combustion from reaching the explosive charge 10 even if the detonator is accidentally fired.
  • the fuse also comprises means to maintain the axial operative position of the assembly 17, 18, 20, comprising a resilient ring 28 which acts radially and which is disposed in a groove 29 provided in the peripheral wall of head 26.
  • a resilient ring 28 which acts radially and which is disposed in a groove 29 provided in the peripheral wall of head 26.
  • the valve 22 of the safety device comprises an opening 30 which forms a portion of the firing passageway and which in the operative position comes opposite opening 21.
  • the angular position ofvalve 22 is maintained by pin 31 fixed in upper plug 20 and whose end extends within a groove provided in the periphery of cylindrical valve 22 and extends along a generatrix thereof.
  • Valve 22 also has a blind bore 34 that is axially disposed in the rest position of valve 22, in which position it is coaxial with openings 21 and 24 in the upper plug 20.
  • Blind bore 34 has the same diameter as opening 24.
  • a conduit 35 is, in the rest position, partially disposed in the blind bore 34 through the opening 24 and fixes thus the rest position of valve 22 against the action of springs 32. The external diameter of this conduit 35 corresponds to the diameter of opening 24 and bore 34 and its internal bore is part of the firing passageway.
  • the conduit 35 has a flange 36 at its upper end which provides one of the seats against which the compression spring 37 presses, the other seat being provided by the bore of the upper plug about the conduit 35. This compression spring urges the conduit 35 forwardly of the fuse out of the blind bore 34 in valve 22.
  • the recess 40 comprises two branches, a shorter branch 42 and a longer branch 43.
  • the midline of each branch zigzags, so that relative movement of the pin 41 and the recess 40 is confined to a zigzag path and is thus retarded.
  • FIGS. 1-4 The fuse shown in FIGS. 1-4 operates as follows:
  • detonator 17 In the inactive position, which is the illustrated position, detonator 17 is located outside the explosive charge 10 of the projectile which is equipped with the fuse. Even if detonator 17 were to be fired, the charge would not explode.
  • the firing passageway connecting the primer 3 to the detonator 17 is closed by valve 22 so that an accidental firing of primer 3 will not fire detonator 17. In this inactive position, the projectile is thus disarmed and harmless.
  • the arming operation proceeds automatically as the round is launched.
  • the projectile is subjected to a very great acceleration such that the inertial forces acting on the assembly 17-20 cause this assembly to be displaced linearly against the action of the return spring 27, toward the rear of the fuse.
  • the lower plug 18 will come to rest at the bottom of the casing 12.
  • the shock is absorbed by the shock absorber 44, for example comprised by a ring of elastic deformable material, such that the casing 12 will not be damaged.
  • the assembly 17-20 will be positioned with respect to the casing 5 so that the resilient retaining ring 28 will confront the annular recess 14 under shoulder 6. This retaining ring 28 deforms and expands so as to lock the fuse assembly in operative position. In this operative position, the detonator enters into the explosive charge surrounding casing 12.
  • the locking ring 38 Simultaneously and/or partially sequentially with the displacement of the assembly 17-20 relative to casing 5, the locking ring 38, which is also subjected to inertial forces because of its mass, will be displaced with respect to the upper plug 20 toward the bottom of the bore 25 against the action of compression spring 27.
  • This axial displacement of the locking ring effects a zigzag displacement thereof as the pin 41 moves through the branch 42 of the recess 40.
  • the pin 41 is located in the upper opening of the reces 40.
  • valve 22 is freed and moves laterally under the action of springs 32 until it strikes against the bushing 19, in which position the passageway 30 is axially aligned with the fuse and connects the internal bore of conduit 35 with the bore 21 of the upper plug 20.'At this time, thefiring passageway is established and cleared and connects the primer 3 to the detonator 17.
  • the primer 3 is fired by impact'of the projectile, theshock wave thus produced will fire detonator 17 which in its turn, because it is disposed'within the explosive charge, will explode the charge '10 through the casing 12 which ruptures under the force of explosion of the detonator 17.
  • This fuse accordingly provides a simple and easily constructed arrangement and simple and strong mounting, which also is characterized by total safety of the projectile, because the projectile is disarmed during storage and transport and in fact until it is fired. Moreover, as the'p'rojectile is not armed until its launching acceleration has diminished, the projectile is not dangerous until it is a substantial distance from its firing or launching site.
  • FIG. 5 the alternative embodiment shown there is of the same general type as that described in FIGS. l-4.
  • the casing 5 is providedwith an annular recess 46 whose function is identical to recess 14 and the shoulder 6 of the first embodiment. This arrangement permits the passage of the guide socket 13 while the rear end of the casing 5 comprises an annular flange 47 against which the spring 27 presses.
  • valve 22 is differently constructed and is displaceable angularly about its own axis, perpendicular to the axis of the fuse.
  • Valve 22 in the FIG. 5 embodiment comprises two trunnions 48, 49 which pivot in the lower part of the upper plug 20 and are disposed on opposite sides of the body 50.
  • Body 50 comprises, as in the first embodiment, a blind bore 34 in the interior of which is disposed in the inactive position the conduit 35.
  • a passage 51 traversing the body 50 from side to side.
  • Spring 53 is disposed about trunnion 48 and acts between this trunnion and the upper plug 20.
  • the other trunnion 49 is provided with an annular recess 54 that extends about.90 and provides a race for a portion of a ball 55 disposed in a housing provided in the upper plug 20.
  • the ends of recess 54 cooperate with ball 55 tofix the angular operative position of the latch and to limit its angular displacement under the action of the spring 53.
  • FIG. 5 The operation of the second embodiment shown in FIG. 5 is similar to that of the first embodiment of FIGS. l-4.
  • the valve 22 When the conduit 35 escapes the blind bore 34 in the valve 22, the valve 22 is displaced angularly to its operative position, which is determined by the entry into contact of the ball 55 and one end of the recess 54, in which position the passageway 51 places the .bore of conduit 35 in communication with the bore 21 so that the firing passageway between primer 3 and detonator 17 is open.
  • the positioning means of the axially movable assembly is formed'by a guide bushing 56 which is secured in the lower portion of casing 5 as in the first form of FIGS. 14.
  • This bushing comprises an internal wall which has a truncated upper portion 57 and a lower shoulder 58.
  • Resilient ears 59 are confined bythe body of bushing 56 maintaining the detonator 17 between the lower plug 18 and the upper plug 61.
  • the forward edge of the guide bushing 56 presses a shielding plate 63 against a shoulder of casing 5 and holds it there.
  • This shielding plate extends perpendicular to the axis of casing 5 and has one or more holes 64 therethrough which are located in the immediate proximity of the wall of casing 5.
  • the mobile assembly In the illustrated inoperative position, the mobile assembly is maintained in a position such that the annular forward edge 67 of the upper plug 61 will bear against the shielding plate 63.
  • This edge 67 is located on a circumference disposed in- I tile, against the action of spring 62.
  • the shock of plug 18 against the bottom of the casing 12 is absorbed by a shock absorber 68 comprising a resilient member disposed adjacent the bottom of casing 12.
  • the resilient ears 59 expand and engage under the shoulder 58, which maintains the mobile assembly in its operative position in which the detonator 17 in introduced into the explosive charge 10.
  • the disarmed condition of the projectile until it has left the firing vicinity is due, in the FIG. 6 embodiment, to the balls 65 which do not leave the bore 66 until the projectile has lost its initial acceleration.
  • FIG. 6 The modified form of FIG. 6, shown in FIG. 7, is similar in a number of respects to that of FIG. 6.
  • the arrangement for positioning the movable assembly comprises a resilient ring 69 provided in a groove 70 in the peripheral wall of the upper plug. This resilient ring cooperates with a shoulder 71 of the casing 5. In this fashion the guide bushing can be eliminated.
  • the safety device of FIG. 7 comprises three balls 65 instead of two, and the shielding plate 63 is replaced with a membrane 72 which is ruptured by the explosion of the primer.
  • the movable assembly 17, 18, 60, 61 is displaced axially while the membrane 72 remains in place, which permits the balls 65 to leave passage 66 upon deceleration.
  • FIG. 7 The operation of the embodiment of FIG. 7 is thus identical to that of FIG. 6 by virtue of the fact that the firing passageway is not opened until the moment when the primer ignites, upon impact of the projectile, which ruptures the membrane 72.
  • the operation of the primer may be effectuated as well by compression as by inertia.
  • the last embodiment of the fuse is more particularly designed for projectiles that are mechanically detonated upon high impact.
  • a projectile comprises an explosive charge 10 in which is disposed the casing 12 in the interior of which the movable assembly of the fuse slides.
  • This casing is carried by an annular support 73 connected to the casing 5 of the fuse by a circular primer seat 74.
  • This primer seat 74 has spaced about its periphery four, six, eight or any other number of mechanical percussion primers 75.
  • These primers 75 are disposed in recesses of the primer seat 74 and are connected to the inside of the casing 12, near the upper end of this casing, by channels 76 provided in the primer seat 74.
  • the casing 5 of the fuse is fixed to the primer seat 74 and is closed at its forward portion by an end piece 77.
  • the movable assembly of the fuse comprises a lower plug 18, the detonator 17 and an upper ring 78 maintained in assembly by a bushing 60.
  • This bushing 60 comprises resilient ears 79 cooperating in a forward rest position with a conical portion of the upper end of the casing 5.
  • the cars 79 expand under the lower face of the primer seat 74 and thus maintain the movable assembly against the action of spring 62.
  • the detonator is outside the charge in the inoperative position but enters into the explosive charge in the operative or armed position.
  • the movable assembly occupies a position such that the lower plug 18 will be situated above the channels 76 and will thus prevent any communication between the primers and the detonator 17. It should be noted that the firing of one or more primers will in this position not rupture the casing 12 and therefore will not fire the explosive charge 10.
  • the movable assembly also comprises a plug 81 centered on the ring 78 and subjected to the action of a spring 80 which tends to separate ring '78 and plug 81. In the inactive position, therefore, the plug 81 is compressed between ring 78 and the end piece 77 by the spring 62.
  • the projectile also comprises mechanical firing pins 82 for each primer 75 actuated by a percussion plate 83.
  • the mobile assembly Upon firing, the mobile assembly is displaced under the effect of the acceleration of the projectile, to its operative position in which the detonator 17 is introduced into the charge. This assembly is maintained in this position by its maintenance means.
  • the plug 81 follows the movable assembly during its movement, the force of the spring 80 being less than the inertial forces acting on the stop during the acceleration of the projectile.
  • the firing passageway is closed and the projectile is thus disarmed.
  • the channels 76 give access to the detonator, it is not until the projectile decelerates that the plug 81 will separate from the ring 78 under the action of the spring 80 and the inertial forces acting thereon during deceleration of the projectile. This arrangement keeps the projectile disarmed until it is a substantial distance from the firing site.
  • the projectile fuse of the present invention comprises a combination of a detonator located outside the explosive charge and introduced into the explosive charge upon firing, and a safety device closing the firing passageway which connects the primer to the detonator until a given moment after firing when some suitable mechanism which acts to open the firing passageway after the detonator has entered the explosive charge.
  • a projectile containing an explosive charge and at the forward end of the projectile a fuse comprising a primer fixedly mounted in a forward portion of the fuse, a detonator containing an explosive charge, means defining a firing passageway between the primer and the detonator such that when the passage-way is openand the primer is fired, the primer will fire the detonator, means mounting the detonator for movement between a forward inactive position forward of and outside the explosive charge of the projectile and a rear active position to which the detonator moves by inertia when the projectile is fired and in which rear position the detonator is within the charge of the projectile, the fuse having fixed closure means which close said passageway in the forward position of the detonator and open said passageway in the rear position of the detonator, said detonator having movable closure means which move rearwardly with said detonator and close said passageway when said detonator moves toward said rear active position and which move forwardly relative to the detonator and open
  • a projectile fuse as claimed in claim 1, said movable closure means comprising at least one ball disposed in a portion of said passageway that extends through a forward portion of said detonator.
  • said fixed closure means comprising a shielding plate that extends across the interior of said fuse and that has a central imperforate portion that closes and retains said at least one ball in said portion of said passageway carried by the detonator, said shielding plate being perforate outwardly of said central portion to complete said passageway through said plate.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Bags (AREA)
  • Portable Nailing Machines And Staplers (AREA)
US282112A 1971-09-06 1972-08-21 Projectile fuse Expired - Lifetime US3858515A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1302071A CH543066A (fr) 1971-09-06 1971-09-06 Fusée de projectile

Publications (1)

Publication Number Publication Date
US3858515A true US3858515A (en) 1975-01-07

Family

ID=4388579

Family Applications (1)

Application Number Title Priority Date Filing Date
US282112A Expired - Lifetime US3858515A (en) 1971-09-06 1972-08-21 Projectile fuse

Country Status (5)

Country Link
US (1) US3858515A (fr)
CH (1) CH543066A (fr)
DE (1) DE2243758A1 (fr)
FR (1) FR2152116A5 (fr)
SE (1) SE397728B (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4212245A (en) * 1977-12-02 1980-07-15 Sarmac S.A. Bottom fuse
US4281600A (en) * 1978-03-08 1981-08-04 Forenade Fabriksverken Subprojectile to be expelled from a projectile
US4284007A (en) * 1978-03-08 1981-08-18 Forenade Fabriksverken Projectile with at least one expellable subprojectile
US4320706A (en) * 1978-12-22 1982-03-23 Sarmac S.A. Percussion head fuse for an explosive projectile
US5105742A (en) * 1990-03-15 1992-04-21 Sumner Cyril R Fluid sensitive, polarity sensitive safety detonator
US10378866B2 (en) * 2015-03-05 2019-08-13 Atlantic Inertial Systems Limited Projectiles

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2933859A1 (de) * 1978-09-22 1980-04-17 Sarmac Sa Gewehrgranate

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1182488A (en) * 1915-06-09 1916-05-09 Reynold Janney Detonator.
US1230933A (en) * 1917-03-30 1917-06-26 William L Simpson Positive fuse-percussion.
US1687341A (en) * 1928-10-09 Fuse for projectiles
US2737888A (en) * 1952-01-25 1956-03-13 Energa Projectile equipped with a safety device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1687341A (en) * 1928-10-09 Fuse for projectiles
US1182488A (en) * 1915-06-09 1916-05-09 Reynold Janney Detonator.
US1230933A (en) * 1917-03-30 1917-06-26 William L Simpson Positive fuse-percussion.
US2737888A (en) * 1952-01-25 1956-03-13 Energa Projectile equipped with a safety device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4212245A (en) * 1977-12-02 1980-07-15 Sarmac S.A. Bottom fuse
US4281600A (en) * 1978-03-08 1981-08-04 Forenade Fabriksverken Subprojectile to be expelled from a projectile
US4284007A (en) * 1978-03-08 1981-08-18 Forenade Fabriksverken Projectile with at least one expellable subprojectile
US4320706A (en) * 1978-12-22 1982-03-23 Sarmac S.A. Percussion head fuse for an explosive projectile
US5105742A (en) * 1990-03-15 1992-04-21 Sumner Cyril R Fluid sensitive, polarity sensitive safety detonator
US10378866B2 (en) * 2015-03-05 2019-08-13 Atlantic Inertial Systems Limited Projectiles

Also Published As

Publication number Publication date
CH543066A (fr) 1973-10-15
SE397728B (sv) 1977-11-14
FR2152116A5 (fr) 1973-04-20
DE2243758A1 (de) 1973-03-15

Similar Documents

Publication Publication Date Title
US4454816A (en) Cartridge having a pyrotechnical actuation of a payload with a safety device
US3858515A (en) Projectile fuse
US4953475A (en) Safety-arming system for launched projectiles
US5549047A (en) Submunition fuse with a nondelay self-destruct firing device
US2900908A (en) Centrifugal safety device for a projectile fuze
US3724385A (en) Fuze having a pneumatic and inertia arming system
US3715987A (en) Fuze for a nongyratory projectile
US2692557A (en) Fuse
US3054870A (en) Variable sensitivity inertia switch
US4030418A (en) Gravity deployed mine with combined upper clearing charge firing and delayed main charge initiation
US3337701A (en) Retard sensor for retarded bombs
US3112703A (en) Universal hand grenades and projectiles
US4599945A (en) Out-of-line interrupter ignition system for flares and markers
US2498043A (en) Fuse
US4667600A (en) Safe/arm explosive transfer mechanism
US3417701A (en) Detonating fuse for bombs and the like
US1393585A (en) Fuse for projectiles
US5168122A (en) Safe-and-arm device
US3430567A (en) Combination fuze for explosive devices
US4015533A (en) Dual pressure sensing safing and arming mechanism
US1288797A (en) Hand-grenade.
US2405840A (en) Fuse
US2420662A (en) Fuze
US1690331A (en) Supersensitive fuse for drop bombs
US4320706A (en) Percussion head fuse for an explosive projectile